Loop Breaker Manual

Document number: SG101278TENLanguage: En Revision: B01 Issue date: 6.11.2008

Instructions manual

DC High speed circuit-breaker UR26 81/82S

Number of pages: 62

SG101278TEN-B01 Established by: Desbaillet Checked by: Released by:Signature:Date:

Sécheron SA Tel. +41 22 739 41 11Rue du Pré-Bouvier 25 Fax:+41 22 738 48 111217 Meyrin- Geneva [email protected] www.secheron.com

Document number: SG101278TEN Revision: B01 Issue date: 6.11.2008 Established by: Desbaillet Copyright© 2008 Sécheron SA - This document is not contractual and contains information corresponding to the level of technology at the date of release.

File: 1-UR26-8S front.fm

Copyright© 2008 Sécheron SAGeneva, SwitzerlandReproduction in whole or part, or disclosure to a third party prohibited.

Design modificationsThis document is not contractual and contains information corresponding to the level oftechnology at the date of release. Sécheron reserves the right to modify and/or improve theproduct, whose characteristics are described in these documents, as required by new technologyat any time. It is the purchaser’s responsibility to inform himself, no matter what thecircumstances, of the product’s maintenance conditions and requirements.Sécheron reserves all rights, especially those arising from our general delivery conditions.

Document informationIn case of dispute between a non-English version of this publication and its correspondingEnglish version, the English one is the only legal version.

It is important to keep this manual for the lifetime of the equipment and to pass it on to anysubsequent owner or user.

Structure of this instruction manual• Chapters A to F: all the information needed to understand, install, use, perform the

maintenance and order a spare part for the standard version of this device.• Chapter G. Options: all the information needed to understand, install, use, perform the

maintenance and order an option or a spare part for these options.• Chapter H. Customization: all the information needed to install, use, perform the maintenance

and order a part for these customized assemblies (chapter not included withoutcustomization).

Note! When the “Customization” chapter is present, always refer to it at first before refering to the otherchapters which are entended to the standard device.

Throughout this manual:

• the numbers between brackets (x) refer to the corresponding positions in the figure shown inthe same sub-chapter.

• the blue texts are hyperlinks, to be clicked on to navigate in electronic files; they are black inprinted manuals.

UR26 81/82S Revision changes


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Revision changesDocument number: SG101278TEN

Revision Date Done by DescriptionB00 13.7.07 Desbaillet Complete rewriting of manual.

B01 6.11.08 Desbaillet

Page 2: added text.A.1.2: removed “Intended”.A.1.6: changed.B.1.2: modified Icw, added (Tamb = 40 °C) in Ith; modified INss text.C.1: modified dimensions.C.8.1: changed text and drawing.C.8.2: modified all.C.13: added ”followed by a holding current.”D.1: changed grease.D.3: changed title.D.4: changed to “Horns”; changed criteria pos 196/197; added “& 300-AC”.D.7.3: clarified text in “Adjustment”.D.7.6: modified text.D.7.6+D.8.1+D.9+D.11: removed W2 greaseD.4+D.8.3: changed “fixed contact piece” into “fixed contact”.D.10: added spring change.D.13: changed “tripping device” into “direct release”; added G.7.2 Xref.E.2b): put (5).F.4.1: put kit catch.F.4.5: modified arc chutes numbers.G: modified § order as UR26-8T manual; removed “not required paragraph”.G.5.2: added “and the lever (9) “; changed drawing.G.5.3: modified.G.5.4: added.G.7: added number.G.7.1 + G.7.2: added stroke K.G.7.1+G.2.1+G.4: added important.


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UR26-81/82S Table of contents


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Table of contents

A. IntroductionA.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-9

A.1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-9A.1.2 Uses of the high speed circuit-breaker . . . . . . . . . . . . . . . . . . . . . . . . . . .A-9A.1.3 Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-10A.1.4 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-10A.1.5 Device identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11A.1.6 Type tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11A.1.7 Routine tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11

A.2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-11A.2.1 Hazard information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-12A.2.2 Personnel use requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-12

B. Technical specificationsB.1 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-13

B.1.1 Breaking current parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-13B.1.2 Main circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-13B.1.3 Control circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-14B.1.4 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-14

B.2 Breaker control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-14B.2.1 Typical values for the closing coils. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-15

B.3 Auxiliary contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-16B.3.1 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-16B.3.2 Commutation diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-16

C. InstallationC.1 Weight and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-17C.2 General requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-18C.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-18C.4 Transport damage procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-18C.5 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-18C.6 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-19C.7 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-19C.8 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-19

C.8.1 Mounting position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-19C.8.2 Clearances to be observed in operating position. . . . . . . . . . . . . . . . . . .C-20

C.9 Earth connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-20C.10 Low voltage connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-21C.11 High voltage connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-22


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C.12 Maximum current release (Id) setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-22C.12.1 Direct release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-22C.12.2 Setting procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-22

C.13 Final visual inspection and tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-24

D. MaintenanceD.1 Required tools and consumable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-25D.2 Standard tightening torques. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-26D.3 Periodicity of the inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-26D.4 Part replacement criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-26D.5 Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-27D.6 Visual inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-28

D.6.1 Arc chute removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-28D.6.2 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-28D.6.3 Arc chute refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-28

D.7 Detailed inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-29D.7.1 Cleaning the contact area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-29D.7.2 Measuring the “W” contact wear dimension . . . . . . . . . . . . . . . . . . . . . . D-29D.7.3 Check and adjustment of the X clearance . . . . . . . . . . . . . . . . . . . . . . . D-30D.7.4 Check and adjustment of the Y clearance . . . . . . . . . . . . . . . . . . . . . . . D-31D.7.5 Check and adjustment of the Z clearance. . . . . . . . . . . . . . . . . . . . . . . . D-32D.7.6 Check and grease. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-32

D.8 Replacement of the main contacts and the pole . . . . . . . . . . . . . . . . . . . . . . . . . . . D-33D.8.1 Replacement of the moving contact assembly . . . . . . . . . . . . . . . . . . . . D-33D.8.2 Replacement of the catch (16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34D.8.3 Replacement of the fixed contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34D.8.4 Change of the pole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-35D.8.5 Final reassembling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-35

D.9 Replacement of the closing device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-36D.10 Replacement of the closing core and the spring . . . . . . . . . . . . . . . . . . . . . . . . . . . D-36D.11 Replacement of the fork unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-37D.12 Replacement of the arc chute parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-38

D.12.1 Replacement of de-ionizing plates and baffles . . . . . . . . . . . . . . . . . . . . D-38D.12.2 Replacement of the horns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-38

D.13 Replacement of the direct release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-39D.14 Replacement of the pusher and the damper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-40D.15 After sales services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-40

E. Trouble shootingE.1 Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-41

E.1.1 Main circuit malfunctions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-41E.1.2 Auxiliary switches malfunctions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-42

E.2 Adjustments of the closing coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-43

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E.3 Performance check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-44E.4 Replacement of the auxiliary contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-44

F. Wear & spare parts catalogueF.1 List description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-47F.2 Recommended spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-47F.3 After sales services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-47F.4 Catalogue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-48

F.4.1 Main circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-48F.4.2 Auxiliaries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-48F.4.3 Direct tripping device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-49F.4.4 Closing device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-49F.4.5 Arc chute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-50F.4.6 Frame and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-50

G. OptionsG.1 Varistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-51

G.1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-51G.1.2 Trouble shouting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-51G.1.3 Spare parts catalogue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-51

G.2 Indirect releases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-52G.2.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-52G.2.2 Maintenance - J clearance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-53G.2.3 Maintenance - In case of replacement of the direct release . . . . . . . . . G-53G.2.4 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-53G.2.5 Spare and wear parts catalogue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-54

G.3 Wiping contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-56G.3.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-56G.3.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-56G.3.3 Spare and wear parts catalogue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-56

G.4 Direct release type DE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-57G.4.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-57G.4.2 Maximum current release (Id) settings. . . . . . . . . . . . . . . . . . . . . . . . . . G-57G.4.3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-57G.4.4 Spare and wear parts catalogue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-58

G.5 Manual closing device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-58G.5.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-58G.5.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-58G.5.3 Spare part catalogue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-59


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G.6 Over current release indicator & contact wear indicator. . . . . . . . . . . . . . . . . . . . . G-59G.6.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-59G.6.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-59G.6.3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-59G.6.4 Spare parts catalogue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-60

G.7 Manual release device: M3 type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-60G.7.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-60G.7.2 Maintenance - J clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-60G.7.3 Trouble shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-61

G.8 Position indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-61G.8.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-61

UR26-81/82S Introduction


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A. Introduction

A.1 General description

A.1.1 DescriptionThe UR26 is a DC high-speed current-limiting circuit-breaker, with natural cooling. It has beendesigned to ensure, on detection of a short-circuit, a trip free and rapid opening of its maincontact; and to quickly extinguish the arc by generating a constant over-voltage during the wholeinterruption process.

02601S

1. Fixed insulating frame made of glass-fibre reinforced insulating material.2. Main circuit, consisting of a lower connection terminal (21), a moving contact (22), an upper

connection terminal (23) and a fixed contact (24).3. Over-current release.4. Arc chute.5. Closing device and fork.6. Auxiliary contacts housing with pusher (7).

A.1.2 Uses of the high speed circuit-breakerBecause of its short response time following the detection of an excess current (short-circuit,overload detection...), it is particularly suitable for the protection of the DC equipment in tractionsubstations or industrial installations.

DANGER! To ensure maximum safety, servicemen and operators must read the A.2 "Safetyprecautions" section before starting installation, maintenance and adjustment ofthe device or before starting to operate it.

2

3

7

1

4

5

6

23

21

22

24


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Introduction UR26-81/82S

A.1.3 Main features• High insulation level to earth and between main contact• High breaking and making capacity• Long service life• Simple maintenance• Small dimensions

A.1.4 Functions

Closing When a closing pulse is received, the closing device (1) moves the fork (2), which closes themoving contact (3) and applies the contact pressure to the main contacts (3 & 9). The pusher (4),pushed by the moving contact (3), actuates the auxiliary contacts (5). The closing force isabsorbed by the damper (6).

HoldingOnce the main contact is closed, the contact pressure is maintained by the closing device (1),either with a reduced holding current (E type) or with a permanent magnet (M type).

OpeningThe circuit-breaker opens either through an over-current release or through an appropriateopening order:

• An over-current that exceeds the maximum current setting value, causes the direct releaserod (7) to move up, which lifts (8) the fork (2), thus releasing the moving contact (3).

• Opening the breaker on remote order cuts off the holding current of the closing device(E type) or applies a reverse current pulse (M type), which causes the fork (2) to retract.

The pusher (4) then opens the moving contact (3) and actuates the auxiliary contacts (5).

The arc generated between the main contacts (3 & 9) moves upwards between the horns (11)into the arc chute (10) and is split by the baffles (12). The ionized gases are mostly neutralisedbetween the de-ionizing plates (13).

02649

1

2

3

12

11

13

5

46

7

8

11

10

9

UR26-81/82S Introduction


File: a-UR26-8S_Intr_en.fm A-11

A.1.5 Device identificationThe plate that is riveted to the device carries the data should you need to contact Sécheron. The CE mark indicates that this device complies with the basic health and safety regulations ofthe European Economic Area (EEA).

03653

A.1.6 Type testsThis device is compliant to IEC 61992 and EN 50123-1/2.

A.1.7 Routine testsThese tests define the particular characteristics that each device has to fulfil at the end of theproduction. These values are recorded in a routine test sheet, which is attached to the device atdelivery.

A.2 Safety precautions

1. Device type 6. International standards number2. Identification number 7. Rated voltage3. Serial number 8. Manufacturer, site of manufacture4. Rated operational current 9. Routine test certificate5. Manufacture date 10. CE mark

Type:

Nr: IEC/EN

Sécheron SA, Genève

Ser. Nr:

In: Un:

Date

109

1234

5

6

7

8

DANGER! High voltage electricity can kill or cause serious injury.Never touch the circuit-breaker before the high voltage circuit is neutralized and theinstallation is properly earthed.All inspection, maintenance and installation operations carried out on the circuit-breaker must be performed with the power off and the circuit-breaker earthed.Some controls require the use of low voltage (DC) electrical supply. Follow thesafety requirements in force to carry out these operations.When performing installation, inspections and maintenance, keep your hands awayfrom moving parts during the opening and closing operations of the circuit-breaker.Do not attempt to service the internal parts without the presence of another personwho is trained in first aid.Modifying, removing, deactivating or otherwise changing components in any waymay affect the safety of the device. Not using parts from the original manufacturercan affect the performance and safety of the device and automatically waivesSécheron’s warrantyCircuit-breaker that appear damaged or defective should be disconnected or madeinoperative and secured against unintended operation until they can be repaired byqualified personnel.


A-12 File: a-UR26-8S_Intr_en.fm

Introduction UR26-81/82S

A.2.1 Hazard informationHazard information in this document has the following meanings:

A.2.2 Personnel use requirements

The instruction manual describes the authorized ways to install, operate and service thedevice, and it may only be installed, operated and serviced in accordance with these instructions.Sécheron will take no responsibility for injury or damage if the device is installed, operated andserviced in any other way.

During installation, maintenance and operation of the device, technicians and operators areresponsible for:

• the device and the working area around the device;• the personnel in the device area;• ensuring that the safety test is fully completed before the high voltage circuit is connected.

Electricians should be certified according to local regulations with experience of similar types ofinstallations. They must have proven skills in reading and working with drawings and cable lists,as well as knowledge of local safety regulations for power and automation. Work with theelectrical equipment must be performed by skilled or instructed technicians only.

According to EN 60 204-1:1992 class 3.55, a skilled person is:

• an individual with technical knowledge or sufficient experience enabling him to avoid thehazards that electricity/mechanical devices/chemicals etc. can create.

According to EN 60 204-1:1992 class 3.30, an instructed person is:

• an individual adequately advised or supervised by a skilled person, in order to avoid thehazards that electricity/mechanical devices/chemicals etc. can create.

DANGER! Immediate danger to life! Failure to observe this information will result in death or serious personal injury!

WARNING! Risk of serious personal injury!Failure to observe this information could result in death or serious personal injury!

CAUTION! Risk of minor personal injury!Failure to observe this information may result in minor personal injury!

Important! Risk of damage to equipment!Failure to observe this information could result in damage to equipment

WARNING! If safety precautions are not followed, there is risk of personal injury.

UR26-81/82S Technical specifications


File: b-UR26-8S_tech data_en.fm B-13

B. Technical specificationsB.1 Characteristics

B.1.1 Breaking current parametersIss = Prospective sustained short circuit current

Îss = Peak of Iss

Icut off = Cut off current

Id = Setting of maximum current release

di/dt = Initial current rate of rise

UNe = Rated voltage

Ûarc = Maximum arc voltage

tb = Total break time

tc = Time-constant of the circuit

tl = Opening time

B.1.2 Main circuit

Refer to the corresponding data sheet for complementary information.

Unit UR26-81S UR26-82SRated voltage UNe 900 V 1800 VMaximal operational voltage 1000 V 2000 VRated insulation voltage UNm 3000 V 3000 V

Rated service current INe 2600 A 2600 AConventional free air thermal current (Tamb = 40 °C) Ith 2600 A 2600 A

Transient overload performances (Tamb = 40 °C):1h5 min.1 min.10 sec

Icw

2700 A3600 A4800 A8200 A

2700 A3600 A4800 A8200 A

Rated short-circuit making and breaking capacity according to EN-50123-1-2

ÎNssINssTNc

180 kA125 kA100 ms

115 kA80 kA

31.5 ms

Making and breaking capacity according to ANSI C37-14UNeIpIs

800 V200 kA120 kA

1600 V140 kA85 kA

Maximum arc voltage Ûarc ≤ 2500 V ≤ 4000 V

03659_S

Id

Icut off

Iss

0.63 Iss

U

t

t

tl

I

tb

Îss

di/dt

Ûarc

UNe

tc


B-14 File: b-UR26-8S_tech data_en.fm

Technical specifications UR26-81/82S

B.1.3 Control circuit

B.1.4 Operating conditions

B.2 Breaker control

The circuit-breaker can be maintained in the closed position using either a reduced holdingcurrent (E type) or without current (M type).

Note! Sécheron recommends the protection of the closing device coil using an automatic circuit-breaker with thermic protection, having the following characteristics: a closing pulse duration of0.5-1 sec, the ability to trigger the circuit-breaker several times consecutively and a holdingcurrent that is limited to 5% of the closing current.

Electric holding: E typeA. Start of the closing pulse: the contacts F + G close.B. Closing pulse: 0.5 to 1 s.C. Start of the holding current: the contact G opens.D. Holding: a R1 resistance limits the holding current to 5% of the closing current.E. Opening: the contact F opens to provoke the interruption of the holding current.

03602

Magnetic holding: M typeA. Start of the closing pulse: the contacts E close.B. Closing pulse: 0.5 to 1 s, then the contacts E open.C. Holding: achieved by the permanent magnet.D. Opening: the contacts F close to provoke a current pulse of the opposite polarity to the

closing current. The duration of this pulse is 0.5-1 s, then the contacts F opens. The openingcurrent is 20 % of the closing current.

Nominal voltage Un 24, 36, 48, 72, 96, 110, 220 Vdc

Supply voltage limits (-25°C < Tamb < +40°C) 0.7Un to 1.25Un

Ambient outdoors temperature Tamb -25 °C to +40 °CAltitude h ≤ 1400 mFlammability To standards NF F 16-101 - NF F 16-102 – NF ISO 1928

Important! A longer closing pulse may burn the coil.

R1: holding resistor S: automatic circuit-breaker

–

+

~ 5%

100%

0 0,5 1 t [s]

SV=

R1

E

F

G

B CA

DIe

UR26-81/82S Technical specifications


File: b-UR26-8S_tech data_en.fm B-15

03604

B.2.1 Typical values for the closing coils

* Optional voltage

R1: resistor to be inserted in the holding circuit of the E type.

Rs: resistor to be inserted in serial with the coil in the opening circuit of the M type.

Rp: resistor to be inserted in paralel with the coil in the opening circuit of the M type.

Notes• Values given for ambient temperature range between -30°C and 70°C. The Imax and Imin

values are given for the most unfavourable values of voltage and temperature.• Rmin = 0.92 x Rnom; Rmax = 1.08 x Rnom.• These values refer to DC voltage or rectified full-wave voltage.• Total opening time of the closing device on its own:

– Type E: 350 ms without recovery diode; 2.5 s with recovery diode (not recommended asthe opening time is too long).

– Type M: 100 to 500 ms• Sécheron recommends to protect the control circuit (while opening) with a varistor.

Rp: parallel resistor Rs: serial resistor S: automatic circuit-breaker

Coil characteristicsClosing E type holding M type opening

Pulse 0,5 to 1 [s] Pulse 0,5 to 1 [s]

Uno

m

Um

in

Um

ax

Rno

m

I nom

I min

E

I min

M

I max

R1

Inom I min

I max Rs

Rp

I nom I min

I max

[V] [V] [V] [Ω] [A] [A] [A] [A] [Ω] [A] [A] [A] [Ω] [Ω] [A] [A] [A]

24 16.8 30.0 0.575 41.7 22.5 25.0 70.9 11.4 2.00 1.38 2.54 2.36 1.33 6.07 3.81 8.49

36 25.2 45.0 1.10 32.7 17.7 19.6 55.6 25.0 1.38 0.95 1.74 5.30 2.99 4.31 2.73 5.96

48 33.6 60.0 2.30 20.9 11.3 12.5 35.4 45.7 1.00 0.69 1.27 9.40 5.35 3.05 1.90 4.27

64* 44.8 80.0 3.64 17.6 9.5 10.6 29.9 79.4 0.77 0.53 0.97 17.20 9.00 2.30 1.45 3.20

72 50.4 90.0 4.40 16.4 8.8 9.8 27.8 100.0 0.69 0.48 0.87 21.20 11.97 2.16 1.36 2.98

110 77.0 137.5 9.40 11.7 6.3 7.0 19.9 210.0 0.50 0.35 0.63 40.00 20.00 1.61 1.01 2.26

125* 87.5 156.3 11.95 10.5 5.6 6.3 17.8 272.0 0.44 0.30 0.56 52.00 26.00 1.42 0.89 1.99

220 154.0 275.0 37.60 5.9 3.2 3.5 9.9 840.0 0.25 0.17 0.32 160.0 80.00 0.81 0.50 1.13

Power consumption [W] 1300 400 400 2200 55 2.3 1.2 3.6 200 15 25 12 38

Ie

~ 20%

100%

0

0

0,5 1 tc tc+1tc+0.5

t [s]

D

FE

BA

C

–

SV=+

Rp

Rs


B-16 File: b-UR26-8S_tech data_en.fm

Technical specifications UR26-81/82S

B.3 Auxiliary contacts

B.3.1 Characteristics• Two hard silver contacts• Breaking capacity at 110 VDC: 1 A (ohmic)• Minimum let-through current: 10 mA for 24 V (for clean and dry environment)• Connections: screws M3

B.3.2 Commutation diagram

03672

M. Main contact

A. Switching of auxiliary contacts (a+b)

M

Aba

1

0

UR26-81/82S Installation


File: c-UR26-8S_inst_en.fm C-17

C. Installation

C.1 Weight and dimensions

DimensionsThe DIN-ISO 2768-1 coarse tolerances are applied to these dimensions.

02610

(1) Type 81 arc chute

(2) Type 82 arc chute


Weight (± 5 kg) UR26-81S UR26-82S

Circuit-breaker (standard, without options): 53 kg 53 kg

Arc chute: 24 kg 34 kg

Total: 77 kg 87 kg

R490

40160

238617 (1)419 (2) 168

69

60 240194 319.5

645131.5

156

371

784

51

9510

0

23

20

300

4xØ11


C-18 File: c-UR26-8S_inst_en.fm

Installation UR26-81/82S

C.2 General requirements

Special arrangements must be agreed between the user and Sécheron SA to cover extremeservice conditions such as:

• altitude above 1400 m;• ambient temperature exceeding + 40°C;• minimum temperature below - 25°C;• high average temperature combined with high relative air humidity (> 95%);• heavy rain, sand storms, etc.

C.3 Packing

Always pack the circuit-breaker assembled with the arc chute and protected against impacts andmoisture.

C.4 Transport damage procedure

The customer must open the package to check the equipment. If the equipment is damaged, thecustomer must imperatively report the damage by means of an official letter to Sécheron SAwithin 7 days of receiving the goods. Once this delay has expired, all transport damages canno longer be covered by our insurance, and Sécheron SA will have to charge the customer forany repair of this nature. For the repair procedure, please refer to our website“www.secheron.com” and click on “Services / RMA”.

C.5 Handling

Circuit-breaker with its arc chute attached: lift it using ropes/slings as shown below.

Arc chute only: manipulate it by hand, or ropes, or straps and a hook. Lift the arc chute usingboth lifting handles (1).

02611

CAUTION! Risk of crushing. The high speed circuit-breaker can weight up to 87 kg.




C.6 Storage

Store the circuit-breaker in a dry (maximum 50% of relative humidity at 40°C), clean and coveredplace, with a temperature range between -25°C and +55°C.

C.7 Disposal

If the device is to be permanently disposed of, disassemble it as far as possible and separate thefollowing materials:

– stainless steel– copper and copper alloys– aluminium– rubber (seals, etc.)– plastics– electrical cables– permanent magnets

Recycle or dispose of all materials and components in compliance with local regulations.

C.8 Mounting

C.8.1 Mounting positionThe circuit-breaker must be installed with the arc chute upside (except when installed in someoptional enclosures).

The arc chute must be screwed on the circuit-breaker.

Fix the circuit-breaker by means of M10 screws (3) or bolts (4), with washers, tightened to atorque of 44 Nm.

To be able to insert one of the screw (3), the earth bolt (5) needs to be removed andreassembled after (see § C.9).

02656-1

Important! The circuit-breaker must be installed in an indoor ventilated enclosure that is freefrom dust and moisture (minimum IP20).

40

23

160 319.5 131.5

5

3 4




C.8.2 Clearances to be observed in operating position

(1) Grid with 50% of surface opening.

02612

C.9 Earth connection

Connect the earthing conductor (1) onto the M8 connecting bolt (2). Tighten it to a torque of22 Nm.

This bolt also connects the closing device (3) and the multi-pole connector (4) to the earth.

03615

Minimum distances to: A B C (1)

Insulating wall 25 95 750

50% insulated grid - - 350

Metal wall 200 300 750

BB AA A

C

A

81 82

CAUTION! The minimal cross-section of the earthing conductor (1) must be of 50 mm2.

1

4

3

2

2

1 2




C.10 Low voltage connections

Connector specifications• VEAM swivel type, with 22 contact pins for conductors from 1.5 to 2.5 mm2, using a multi-core

cable. • The 20x1.5 mm2 and the 2x2.5 mm2 (positions 21 and 22) male pins are made of gold plated

copper. • The 22 x 2.5 mm2 female pins are made of gold plated brass.• Contact: Imax = 41A; ∆U = 20 mV.

Installationa) Insert the cables (1) into the female pins (2) according to the diagrams shown below, using

the following crimp contact tools from Cannon ITT Industries:– Crimping tool VM8.– Crimping die VH435.– Insertion tool 46736.– Removal tool 43240.– Guide pin for female contacts 27977-12T8.

The closing coil is connected to pins 21 and 22 of the connector, regardless of the polarity

b) Connect the moving connector (3) into the fixed connector (4).

03614

Wiring between the auxiliary contacts and the connector:

A. Type ab (NO-NC) auxiliary switches.B. Type U changeover auxiliary switches.C. Double connection only for closing device at 24 Vdc.

Note! Up to five double-contact switches (5) can be inserted in the auxiliary housing (6).

4

6

2

1 3 12

3

4

56

789

10

14

15

161718

19

2021

2211

1213

5

6

C

2115

13 10 7 4 1

14 12 11 9 8 6 5 3 2

22

C

21

20

22

19

B CAC

D D

D

2119

20 18 14 1016 12 8 6 4 2

17 15 13 11 9 7 5 3 1

22




C.11 High voltage connections

The power connections may be made by cables or bars.

a) Clean the surface of the main connections (1).b) Connect the bars (2) or the cables (3) using four M12 bolts (4) onto each main terminal (1).

Tighten the bolts (4) to a torque of 67 Nm.

02613

Note! According to EN-50123 for this range of current, the recommended current density is 1 A/mm2

for copper bars and 1.5 A/mm2 for copper cables.

C.12 Maximum current release (Id) setting

C.12.1 Direct releaseThe direct release may or may not be equipped with a removable core (11) according to yourspecification of the release range. When the core is removed, store it in the special clip (13).

02650

C.12.2 Setting procedurea) Remove the caps (6 & 7).b) Loosen the lock nut (3).c) Loosen or tighten the special nut (4) to move the indicating mark (5) to the required value.d) Tighten the lock nut (3) and re-insert both caps (7& 6).

The tripping device (1) is calibrated at the factory and adjusted either to the lowest value on theadjustment scale or to the value requested by the customer when ordering. A label (2 & 9) showsthe correspondence between the current values and the scale (8).

4

41

13

3

1 2

54321

11

1

1

1311

1




Version with coreTwo ranges of setting are available:

– With the core (11) inserted in the direct release (1): the setting range is, according tolabel (9A), between 2000 and 4600 A, with corresponding scale (5) from 1.3 to 4.8.

– With the core (11) removed from the direct release (1): the setting range is, according tolabel (9B), between 4300 and 8000 A, with corresponding scale (5) from 1.0 to 4.9.

Example: to set the maximum current release value Id at 6000 A, an extrapolation from thelabel (9) requires the indicating mark (5) to be set at 2.4 on the scale with the core (11) removed.

03620

A. Values with the core inserted (in amperes corresponding to the beginning, middle and end ofthe scale).

B. Values with the core removed (in amperes corresponding to the beginning, middle and end ofthe scale).

Version without core (optional)Example: to set the maximum current release value Id at 2500 A, an extrapolation from thelabel (2) requires the indicating mark (5) to be set at graduation 1.8.

03616

A. Current in amperes.B. Corresponding line on the direct release scale (8).

54321

Ids (A)

2000

3000

4600

4,8 4,9

3,0

8000

6500

4300

1,01,3

2,4

HSHR 430 390 P1

A B

Pt. 1,8= 2450 A

3

4

8

59

1

76

11

54321

Ids (A)

2000 1,2

2,3

2,8

3,2

4,2

3000

3500

4000

5000

HSBA 400 226 P1

A B

Pt. 1,8= 2500 A

3

4

8

521

7

6




C.13 Final visual inspection and tests

Perform the following operations before putting the circuit-breaker into service.

a) Check the following points:– Closing pulse duration set between 0.5 and 1 s, followed by the holding current.– Holding current value (in the case of an E type circuit-breaker) set at 5% of the closing

current value.b) Ensure that both catches (1) of the moving contact are properly inserted in both grooves (2)

of the fork unit (3).

02617

c) Check that all fixing and connection bolts are correctly tightened.d) Check that the circuit-breaker can close and open several time consecutively.

3

1

2

Important! Operate the circuit-breaker to test it WITHOUT connecting it to the high voltagecircuit.Never operate the circuit-breaker under electric load without the arc chute and thesparks arresters fitted.

UR26-81/82S Maintenance


File: d-UR26-8S_maint_en..fm D-25

D. Maintenance

D.1 Required tools and consumable

11-14: Sécheron quotes and delivers these tools on request.

11-13: gauges of type min-max:

– if both ends pass: clearance too wide;– if both ends do not pass: clearance too narrow;– if one end passes and not the other: the clearance is within tolerances.

03655

Grease for general purposeShell Rhodina LT2; Sécheron number SG104114P00001.


1. Open end wrenches 8, 10, 13 and 17 mm / 2x24 (4 mm thick)2. Pin removers 4 and 6 mm3. Allen wrenches 2.5, 3, 4, 5, 6 and 8 mm4. Ratchet wrench with sockets 8, 9, 10 and 13 mm5. Flat head screwdrivers Nº 4 and 6 mm6. Pozidriv screwdriver Nº 17. Flat long nose pliers 60 mm8. Set of feeler gauges 0.05 to 2 mm9. Electric test multi-meter10. Knife or scraper11. Sécheron gauge SG101425P112. Sécheron gauge SG101427P0000213. Sécheron gauge SG101429P0000214. Sécheron spacer SG101777P0000115. Dry cloth

1 2 3 4 5 6 7 8 9 10 11 12 13 14


D-26 File: d-UR26-8S_maint_en..fm

Maintenance UR26-81/82S

Cleaning agentsDenatured alcohol.

A solution of liquid soap in water may be used on polyester or polyamide parts on the conditionthat these parts are stripped down to the polyester or polyamide parts only for this work and thenrinsed with fresh water and well dried before reassembly.

D.2 Standard tightening torques

Unless specially indicated, use these values for greased stainless steel bolts.

Note! Paint a red line on the parts after having tightened a screw/nut to the requested torque.

D.3 Periodicity of the inspections

D.4 Part replacement criteria

Refer to the “wear and spare parts catalogue” chapter for the location of the parts.

For parts that are subject to wear due to current interruptions:

Important! No other solvents allowed!

Thread diameter Torque [Nm] ± 10% Thread diameter Torque [Nm] ± 10%

M3M4M5

1.32.95.4

M6M8M10

92244

Operation Frequency

Visual inspection At least once a year

Detailed inspection

Whenever one of the following event occurs first:– Every 18-24 months– Or after every 250 overload current interruptions

(current value > maximum current release setting Id).– Or after every 500 manual or remote openings

(current value < maximum current release setting Id).

Item position Name of the component Replacement criteria See §

121115 / 116192 / 193

Moving contact*Fixed contact*Pole*

When dimension W1 reaches 54 ± 0.5 mm or W2 reaches 3 ± 0.5 mm.

D.7

196/197 Spark arrestersWhen the marks left by local burns reach a depth that is half the original thickness (12 mm) of the parts or when cracks appear.

D.7

5806 HornsWhen their cross-section reaches half the part’s original cross-section (20 x 4 mm2).

D.12.2




* These parts should be changed simultaneously

Replace the following parts, subject to wear due to mechanical operations, according to thenumber of current interruptions (counted or estimated).

* To be replaced completely, or returned to Sécheron SA for repair.

D.5 Procedure

Perform the following operations:

580258035804

De-ionization platesWhen the marks left by local burns reach a depth that is half the part’s original thickness (2.5 mm).When vertical cracks appear.

D.12.1

5805 BafflesWhen they are touching each other.When the wear (1) reaches a height that is half the part’s original height.

D.12.1

Item position Name of the component Number of current interruptions See §

123330334370710720127-AC324-AC

CatchFork unitCompression springClosing corePusher assemblyDamperSpring AC (optional part)Cover AC (optional part)

50’000

D.8.1D.11D.9D.9D.14D.14G.3G.3

300 & 300-AC Closing device 150’000 D.14

G.3

250, 1200, 1280, 1290

Direct over-current instantaneous release*Optional indirect release*

Criterion: Every 10’000 trips (every 10 years at a rate of 3 trips per day).

D.13G.2

Visual inspection See §1. Remove the arc chute D.6.12. Perform the visual inspection D.6.23. Refit the arc chute D.6.3

Detailed inspection1. Clean the contact area D.7.12. Measure the “W” contact wear dimension D.7.23. Check and adjust the “X” clearance D.7.34. Check and adjust the “Y” clearance D.7.45. Check and adjust the “Z” clearance D.7.56. Check and grease D.7.67. Check and adjust the “J” clearance G.2.2 + G.7.2

1




D.6 Visual inspection

The circuit-breaker contacts must be checked and maintained with special care. Any soot depositshould be wiped away with a dry rag. If large beads form, scrape them off using a wire brush.

D.6.1 Arc chute removala) Remove the screws (1).b) Loosen both nuts (2) and turn the flanges (3) of 90° to free the horns (4).c) Carefully swivel (5) the arc chute to the side of the circuit-breaker.

03619

D.6.2 Inspectiona) Visually check that all components such as bolts, nuts, clips, etc. are present. If needed,

replace them, and tighten them according to the table of the § D.2, except for specificallyspecified torques in corresponding paragraphs throughout this manual.

b) Check the following parts for wear (1) according to the § D.4 "Part replacement criteria" andtheir referenced sections:– the moving contact (2);– the fixed contact (3);– the pole (4);– the sparks arresters (5): remove them from the circuit-breaker and clean them using a

dry rag and a dust collector;– the outer horns (7) and the baffles (8).

c) Change them when necessary.

03622

D.6.3 Arc chute refittingReassemble the arc chute in reverse order to § D.6.1 "Arc chute removal".

Tighten both nuts (2) with washer to a torque of 10 Nm.

Important! Never use a file on the contacts.Never apply grease onto the contacts.

2

34

51

3

5

7

7

8

4

5

3

2

41




D.7 Detailed inspection

First perform a visual inspection, see § D.6.

D.7.1 Cleaning the contact areaa) Remove the spark arresters (2).b) Clean them using a dry cloth and a dust collector, as well as the upper plate (3) , the frame at

the bottom (4) of the cut-out chamber and the arc chute inlet (1).c) Refit all components.

03623

D.7.2 Measuring the “W” contact wear dimensionTwo different methods can be used. Use the method 1 when the lateral access to the maincontacts is possible.

The circuit-breaker must be closed.

Method 1a) Remove a spark arrester (1).b) Using a flexible graduated ruler (2), measure the W1 distance between the base of the fixed

contact plate (3) and the horn (4) of the moving contact (5).If W1 ≤ 54±0.5 mm, replace the main contacts (see § D.8 "Replacement of the main contactsand the pole").

02625

Note! “W1” dimension for new contacts is 61±1mm.

1

44

3 2

5 10 15 20 25 30 35 40 45 50 55 60 65 70

5 10 15 20 25 30 35 40 45 50 55 60 65 70

1

3 2 4

A B

25 53 4

W1W1




Method 2The circuit-breaker must be closed.

Measure as shown below.

– “W2” dimension for new contacts is 8±1mm.– If W2 ≤ 3±0.5 mm, replace the main contacts (see § D.8).

03624

Note! Where the optional manual closing device is present, please see § G.5 "Manual closing device".

D.7.3 Check and adjustment of the X clearance

Requirement: X = 2.0 ± 0.5 mm.

Note! This measurement is performed with the circuit-breaker opened and secured in this position.

Measurementa) The SG101777P00001 spacer (1) must be inserted between the mobile and the fixed

contacts to block the contacts in the open position.

02638

b) Checking the X clearance: two possible ways:• Measure the extension of the rod (2) out of the closing device (3) with a depth gauge or a

comparator.– First, without pressure on the rod (2), measure the length A.– Second, with pressure (6) applied axially onto the rod (2), press the fork (4) against both

catches (5), measure the length B.– The A-B difference corresponds to the X clearance.

• Remove the arc chute (see § D.6.1) and the spark arresters (7).Insert a feeler gauge (8) between the fork (4) and one of the two catches (5).

c) Adjust the X clearance if the measurement is out of tolerances.

AdjustmentAdd or remove the shims (9) on the closing device fixing bolts according to § D.10, until thecorrect X clearance is obtained (adding shims (9) increases the X clearance).

W21

2

1 2

7 45

19

32

B

A

X

6

8

X




D.7.4 Check and adjustment of the Y clearance

Requirement: Y = 2.0+0.2/-0.5 mm

Note! This measurement is performed with the circuit-breaker closed.

MeasurementMeasure the Y clearance on both arms (6) of the fork with the recommended SG101429P00002Sécheron gauge (or a feeler gauge). Where there is a difference between the sides, take theaverage value Y = (Y1+Y2)/2.

AdjustmentLoosen the lock nut (1) and the nut (2), turn the nut (2) to adjust the Y clearance and retightenthe nut (1).

After adjustment, at least two open/closing operations must be performed prior to re-check theclearance.

Note! Control and adjust the Y clearance after each setting of the “Id” value (see § C.12 "Maximumcurrent release (Id) setting"). If no specific Id value is determined when adjusting the Y value, set the ld to the mark “2” on thedirect release scale.

026396

Y

1

2




D.7.5 Check and adjustment of the Z clearance

Requirement: Z = 1.6 ± 0.2 mm

Requirement with the optional wiping contact mounted: ZAC = 0.1+0.3/-0 mm. To see if this optionis mounted, see § G.3 "Wiping contact".

This measurement is performed with the circuit-breaker opened. A correct Z clearance setting isimportant to correctly operate the auxiliary contacts (2), which signal the circuit-breaker status(opened or closed). The auxiliary contacts may not operate when there is an incorrectZ clearance.

Measurementa) The SG101777P00001 spacer (1) must be inserted between the mobile (3) and the fixed (4)

contacts to block them in the completely opened position.

Note! If the optional “Position Indicator” is mounted on the housing (9), see § G.5.

b) Remove the transparent cover (5).c) Measure the Z clearance at the tip of the pusher (8) using the recommended

SG101427P00002 Sécheron gauge (or an universal feeler gauge).

AdjustmentLoosen the lock nut (7) and nut (6), turn the nut (6) to adjust the Z clearance and retighten both.

After the adjustment, at least two open/closing operations must be performed before recheckingthe clearance.

02640

D.7.6 Check and greasea) In order to check the tightening torque of all screws and nuts, look at the red mark (4) which

must be aligned; if this mark is desaligned (5) retighten the screw according to the § D.2 tableor specifically specified torques in corresponding paragraphs throughout this manual (i.e thenuts (1) at 17 Nm).

b) Grease the fork assembly (2) and the ratchet catch (3), applying the grease with a brush.

02626

1

59

4

3

5

2

Z678

8 4

2

31

5

4




D.8 Replacement of the main contacts and the pole

a) Remove the arc chute (see § D.6.1 "Arc chute removal").b) Remove the spark arresters (1).c) Remove the flanges (2), the thin M8 nuts (3) and the spring washers (4).

02686

D.8.1 Replacement of the moving contact assembly

Removala) Remove both horns (20), the spacers (4) and both coolers (5).b) Remove the box (6).c) Remove the damper assembly (7).d) Remove the end of the pusher (8) from its seat (9) on the moving contact, then remove the

pusher (8) from the frame (10). See § D.14 for details.

Note! With the wiping contact option: remove both screws, sockets and springs (see § G.3 "Wipingcontact" for details).

e) Drive out the pin (11).f) Remove the moving contact (12) assembly.

02685

Reassemblinga) Insert the new moving contact (12). Slightly grease the catches (16).b) Insert the pin (11) through the lower connecting bar (15) and the new moving contact

assembly (12).

Note! If the optional wiping contact has been previously removed, remount it according to § G.3.2.

1

3,4

2

0,1

9

12

17

16

5

67810

11

18

2012

5

4

16

15

13

14




c) Reassemble the pusher (8) on the frame and insert the end of the pusher (8) into its seat (9)on the moving contact.

d) Reassemble the damper assembly (7).e) Reassemble the box (6).f) Reassemble both coolers (5), the spacers (4) and both horns (20).g) Check the alignment of the moving contact (12) with the fixed contact (13). If necessary,

realign by loosing the screws (14) of the lower connecting bar (15), aligning it and thentightening the screws (14).

h) Check the X and Y clearances. If necessary, adjust them according to § D.7.3 and D.7.4.

D.8.2 Replacement of the catch (16)Refer to the illustration 02685 above.

a) Remove both 2 screws (17) and change the catch (16).b) With a small angle, adjust the perpendicularity (18) and tighten the screws (17).

D.8.3 Replacement of the fixed contact

Removala) Push the key (1) off the top plate (2).

Note! For the 1000 V version, lift the horn (3) to free the screw (4).

b) Remove the screw (5) located in the insulator.c) Remove the fixed contact in upward direction (6). The fixed contact is composed of an upper

connexion (7) and a fixed contact (8). If the contact surface is worn, replace only the fixedcontact (8).

d) Remove the fixed contact (8) by unscrewing the three screws (9).

Reassemblinge) Check the perfect condition of the contact surfaces of the upper connexion (7) and of the new

fixed contact (8).f) Fix the new fixed contact (8) on the upper connexion (7) by means of the three screws (9)

and tighten them to a torque of 22 Nm.g) Introduce the fixed contact (7,8,9) into its seat on the breaker and slide it up to the stop

against the projection of the frame.h) Reinsert the screw (5) in the insulator and tighten it.i) Slide the key (1) onto its seat in the top plate (2).

Note! For the 1000 V breaker, lift the horn to let pass the screw (4).

02627

1 32 5

4

8 9611

10

7

12 13 15 14 16




D.8.4 Change of the poleRefer to the figure "02627" above.

Removala) Remove one of the two horns (10).b) Loosen the connecting flange (11).c) Remove the connecting flange (12).d) Remove (16) the pole (13) - blow-out core (14) - seal (15) assembly and disassemble it.

Reassemblinge) Slide the blow-out core (14) and then the seal (15) onto the new pole (13).f) Insert this assembly into its seat on the breaker.g) Reassemble the connecting flange (12).h) Reassemble the connecting flange (11), press the pole (13) against the frame to tighten it.i) Reassemble the horn (10).

D.8.5 Final reassemblingRefer to the § D.8 "Replacement of the main contacts and the pole" figure.

j) Reinsert the sparks arrester (1).k) Reassemble the arc chute (see § D.6.3 "Arc chute refitting").




D.9 Replacement of the closing device

Removala) Disconnect the wires (1,8).b) Remove both M6 earth connection screws (2).c) Unscrew the three M8 nuts (3) and remove the entire device (4).

02629

Reassemblingd) Insert the entire device (4).e) Ensure that the fork unit (5) is properly turned (with the notches (6) downside) and properly

placed on the moving contact catches (7).f) Holding the device (4), screw-on the 3 M8 nuts (3) with their washers.g) Lift the fork (5) by hand and check that it remains properly in place when released.h) Check the X and Y clearances and adjust them if necessary (see § D.7.3 and D.7.4).i) Connect both (or the four for 24 V coil) wires (1,8), with the blue one on the left.j) Connect the earth connection (2) using both M6 screws.k) Slightly grease the fork (5) and the catches (7).

D.10 Replacement of the closing core and the spring

a) Remove the closing device (1) (see § D.9 "Replacement of the closing device") and the forkunit (see § D.11 "Replacement of the fork unit").

b) Stand it on a bench in vertical position and remove the four screws (2) and the cover (3).

c) Remove the closing core (6) and the spring (7).d) Reassemble in reverse order with new closing core and spring.

02681

Important! Never touch the screw (32).

6

7 2

3

318

4

4

325

Important! Do not change the position of the flange (4) while working.Mark its position (5) with a felt-tip pen before removing the closing core.

2

6

3

1

7

5

4

6

51




D.11 Replacement of the fork unit

a) Remove the closing device; see § D.9 "Replacement of the closing device".

b) Remove the circlip (1) and the pin (2).

The new fork unit is supplied with its own pin, therefore to reassemble the fork unit:

c) Remove the circlip (1) and then the pin (2) from the new assembly.d) Place the fork (3) onto the end of the closing rod (4); the notches (6) must be downside.e) Connect them by inserting the pin (2), then the circlips (1).f) Lightly grease the fork.g) Reassemble the closing device; see § D.9 "Replacement of the closing device".

Important! When reassembling the closing device, the spacers (5) must be reinserted exactlyat the same place from where they were removed.

1

3

3 21

42

5 402630

6




D.12 Replacement of the arc chute parts

D.12.1 Replacement of de-ionizing plates and bafflesa) Remove the arc chute (1, see § D.6.1 "Arc chute removal") and place it upright on a bench.b) Loosen the six bolts (2) by several turns, starting from the bolts at the top.c) Separate the tops of the arc chute walls (3) by about 8 mm to form a “V”.d) Remove the baffles (4) and de-ionizing plates (5) one by one.

e) Re-insert the baffles (4) and the de-ionizing plates (5) one by one, replacing the worn partsaccording to § D.4 "Part replacement criteria".

f) Press the arc chute walls (3) together and tighten the six bolts (2); do not forget the washers!

03636

D.12.2 Replacement of the hornsa) Lay the arc chute (1) on a bench.b) Loosen the bolts (2) and spread (5) the lower part of the arc chute walls (3).c) Remove the horns (4) and replace the worn horns according to § D.4 "Part replacement

criteria".d) Fit the new horns (4) and press the lower parts of the arc chute walls (3) together.e) Tighten the bolts (2) by hand.f) Place the arc chute (1) upright and tighten the bolts (2) firmly using a wrench.

03637

g) Reassemble the arc chute in reverse order of the § D.6.1.

Important! These elements must be reassembled in the same order.

12

4

33

2

4

5

5

5

2

1

23

4

4

5

5




D.13 Replacement of the direct release

Removala) Remove the moving contact (1) with the catches: see § D.8.1 "Replacement of the moving

contact assembly".b) Remove the damper unit (2) and the pusher assembly (3): see § D.14.c) Remove both screws (5) to lower the connecting bar (6).d) Remove both M8x90 screws (7) to lower the direct release (8).

Note! These screws (7) can also attach an optional indirect release (see § G.2).

02635

Reassemblinge) On the new direct release, insert the nut (9), the washer (10), the spring (12) and the lock

nut (13) without tightening them.f) Attach the direct release (8) onto the frame (11), using both M8 x 90 screws (7, attach also

the optional indirect release if present).g) Insert the lower connecting bar (6) through the frame (11) and the direct release (8). Insert

the screws (5) and hand-tighten them.h) Insert the moving contact (1, see § D.8.1), then the pusher (3) into the frame (11, see § D.14)

and the damper unit (2).i) The moving contact (1) must be located in the centre of the slot (15) and in front of the fixed

contact (16). If necessary loosen the screws (5), correct the alignment of the lowerconnecting bar (6) and re-tighten.

j) Close the breaker and adjust clearance Y: see D.7.4.k) Where an optional indirect release is present, adjust the J clearance according to § G.2.2 and

G.7.2.

Note! With a new direct release, calibrate the circuit-breaker to determine the new equivalenciesbetween the maximum current release ld and the adjustment scale. A direct current supply isneeded.

1

1

5

10

12

13 9

3 8

8

2 14

16

6

11

7

6

15




D.14 Replacement of the pusher and the damper

These parts must be removed when changing the direct release.

Criteria to change the damper (11): 50’000 operations, or visible traces of oil on it or on thebottom of the frame (13).

Pushera) Remove the connector (1) and the earth connection (2).b) Remove the end (3) of the pusher (4) from its seat on the moving contact (5).c) Push the swivel joint support (6) off its seat (7) to remove the pusher.d) Insert the new pusher (4) into its seat (7).e) Insert the end (3) of the pusher into its seat on the moving contact (5).f) Check that the swivel joint support (6) is at the bottom of its seat (7).g) Adjust clearance Z: see § D.7.5 "Check and adjustment of the Z clearance".h) Reconnect the connector (1) and the earth connection (2).

Dampera) Remove the connector (1) and the earth connection (2).b) Remove the unit (9) from its frame seat (10).c) Remove the damper (11) from its sleeve (12).d) Insert the new damper (11) into its sleeve (12).e) Hold the unit (9) by hand and insert it into its frame seat (10), compressing the piston (14)

with your thumb.f) Push the unit (9) to the bottom of its seat (10); closing the circuit-breaker if necessary.g) Reconnect the connector (1) and the earth connection (2).

02634

D.15 After sales services

For any return of merchandise to Sécheron, please refer to our website “www.secheron.com”and click on “Services / RMA”.

1

23

4

6

710

1112

9 1314

54

UR26-81/82S Trouble shooting


File: e-UR26-8S_trouble_en.fm E-41

E. Trouble shooting

E.1 Procedure

E.1.1 Main circuit malfunctions

Both of the following tables refer to the closing device type mounted on the circuit-breaker:

Type M closing device


Defect Possible causes Remedies

Over-heating

Dirty or damaged (worn or burnt) contacts.

Clean or change the main contacts, see § D.8.

Loose main conductor connections. Tighten the connections bolts, see § C.11.

Load current exceeds the circuit-breaker admissible value.

1. Increase the power cables orbusbars cross-sections: see § C.11.

2. Reduce the current.3. Change the category of circuit-

breaker.

Defect Possible causes Remedies

AThe circuit-breaker does not maintain its closed position.

Closing current too low: I < Imin

1. Check the power of the alternating current source.

2. Charge the batteries.Closing pulse too short: t < 0,5 s. Modify the delay of the pulse (at drop-out).

Closing device gap too wide. Reduce the gap: see § E.2 procedure 1.

BThe closing device does not return to rest after an opening by Imax (direct or indirect release) followed by an “off” order.

Pulse too short: t < 0,5 s. Modify the delay of the pulse (at drop-out).

Correct agreement between the gap of the device and the tripping current out of range (I < Imin or I > Imax).

1. Check the values of the tripping Rs resistor: see § B.3.1.

2. Check the presence and the values of the parallel Rp resistor: see § B.3.1.Insert Rp if needed: see § B.1.3.

3. Check if the closing coil has been dismantled. In that case, it may have been improperly setwhen reassembled: adjust the gap accordingto § E.2 procedure 3.Do not change settings made by Sécheron.


E-42 File: e-UR26-8S_trouble_en.fm

Trouble shooting UR26-81/82S

Type E closing device

E.1.2 Auxiliary switches malfunctions

DEFECT CAUSE REMEDY

CThe device does not maintain its closed position.

Closing current too low: < Imin

1. Check the power of the alternating current source.

2. Charge the batteries.Closing pulse too short: < 0,5 s. Modify the delay of the pulse (at drop-out).Series connection of the holding resistor:1. without overlapping.2. not available.

Verify and modify:1. Delay.2. Relaying.

Holding current too low:< I hold min

Verify and adjust holding resistor.

Gap too wide Reduce the closing device gap: see § E.2 procedure 1.

DThe device does not return to rest after an opening by Imax (direct or indirect release) and an “off” order.

Residual current in the closing coil: I ≠ 0.

Modify the control circuit to have I = 0.

Gap too small.

Increase the gap: see § E.2 procedure 2.If the device has been dismantled and then improperly set: adjust the rated gap according to § E.2 procedure 3.

Defect Possible causes Remedies See §Switch does not operate Defective switch Replace the switch E.4One or more switches do not operate

Z clearance outside of setting tolerances Adjust the Z clearance D.7.5




E.2 Adjustments of the closing coil

Procedure 1This procedure:

• reduces the gap on the E type closing device.• increases the gap on the M type closing device.

02641

a) Mark (1) the position of the cover (2) in relation to the body (4) with a pen.b) Loosen the four screws (5).c) Turn the cover (2) counter clockwise (3) by 50 mm (taken on the body (4) at the

circumference).d) Tighten the four screws (5) to a torque of 9 Nm.e) If the adjustment described above is not sufficient, repeat operations a) to d) until the correct

result is achieved.f) If the adjustment is satisfactory, carry out the following test:

– close the circuit-breaker;– disengage the fork (6) from the catches (7);– transmit an “off” order to the closing device; if it does not return to rest, see defect:

B for M type or D for E type (in the above tables).

Procedure 2This procedure:

• increases the gap on the E type closing device.• reduces the gap on the M type closing device.

a) Mark (1) the position of the cover (2) in relation to the body (4) with a pen.b) Loosen the four screws (5).c) Turn the cover (2) clockwise (8) by 50 mm (taken on the body (4) at the circumference).d) Tighten the four screws (5) to a torque of 9 Nm.e) If the adjustment described above is not sufficient, repeat operations a) to d) until the correct

result is achieved.f) If the adjustment is satisfactory, carry out the following test:

– close the circuit-breaker.– If the closing device dose not remain in the closed position, see defect:

A for M type, orC for E type in the above tables.

03642

4

2

53

1

4

17

6

4

2

1 5

8

1




Procedure 3: adjusting the rated gapa) Remove the four screws (5) and remove the cover (2).b) Rotate the flange (9) until the following E dimensions are obtained:

– E = 10 ±0.1 mm for type E (electric hold)– E = 8.5 ±0.1 mm for type M (magnetic hold)

c) Mark the new point (10) corresponding to the rated gap on the body (4).

d) Insert the cover (2) and tighten the four screws (5) to a torque of 9 Nm.e) Mark the cover (2), with a extension of the marking (10) on the body (4) to indicate the

position of the flange (9).

03643

E.3 Performance check

See the trouble shooting sheets for M or E type if one of the functions is not carried out during thetest.

a) Close the circuit-breaker and check:– the closing current;– the holding current (E type).

b) Trip the circuit-breaker by giving it an “Off” order and check:– the tripping current (M type).

c) Close the circuit-breaker, disengage the fork (1) from the catches (2), give an “Off” order tothe closing device (3) and check:– the return of the fork (1) to the rest position.

02644

E.4 Replacement of the auxiliary contacts

To be performed in case of a damaged auxiliary contact (for example, by a short-circuit).

a) Disconnect the earth connection nut (7).b) Remove the auxiliary contacts housing (1) and the transparent cover (2).

Important! Do not turn the flange (9) after this adjustment.

EE

52

3

10

9 9 103

3

2

1




c) Remove the first switch (3), then the first insulation sheet (4) and continue until you find thedefective switch (by testing them with an electric multi-meter).

d) Mark and disconnect the 3 or 4 wires and replace the defective switch.e) Connect the wires.

Note! To wire the 5U type (3 wires - reversing contacts), remove the connection (6) from the oldswitch (3) and refit it on the new switch.

f) Replace the switches (3) and insulation sheets (4) in the reverse order to which they wereremoved.

g) Slowly push the plate (8) by hand to check the function of the five switches (3) by the soundof the switching noise.

h) Slide the cover (2) back on.i) Attach the auxiliary contacts housing (1) with screws tighten to a torque of 2 Nm.j) Tighten the earth connection nut (7) to a torque of 2 Nm.

036337

2

1

1 4

38

6

5

2




This page intentionally left blank

UR26-81/82S Wear & spare parts catalogue


File: f-UR26-8S_spc_en.fm F-47

F. Wear & spare parts catalogueF.1 List description

• Pos: reference number between list and drawing.• Part number: number to quote when ordering a part.• WP: wear parts• SP: recommended spare part (see the “Recommended spare parts” section below).• Description: name of the article.• Qty: number of items needed in the complete assembly.

Note! Some parts may not be the correct ones if your device have optional parts that override theseparts: in that case, the correct part numbers can be found in the “Options” or “Customization”chapters.

F.2 Recommended spare parts

In addition to the wearing parts, we recommend to keep in stock some parts that could bedamaged by inadequate operations.

Depending on the quantity of devices in operation, we recommend the following number of spareparts for each SP part quoted in the catalogue:

F.3 After sales services

For any return of merchandise to Sécheron, please refer to our website “www.secheron.com”and click on “Services/RMA”.

Important! Check first if the part is (or isn’t) in the “Options” and “Customization” chaptersbefore to quote a part number.

Quantity of devices in operation Quantity of spare parts

1 to 10 1

11 to 100 2

101 to 500 2%

> 500 1%


F-48 File: f-UR26-8S_spc_en.fm

Wear & spare parts catalogue UR26-81/82S

F.4 Catalogue

F.4.1 Main circuit

02602S-1

F.4.2 Auxiliaries

100408-3

115-116

192-193

120

196190

123

Pos. Part number WP SP Description Qty

115 HSBA300141R0001 x Fixed contact 1 kV 1

116 HSBA300142R0001 x Fixed contact 2 kV 1

120 HSBA200031R0100 x Moving contact 1

123 SG102150R00500 x Kit catch UR26 1

192 HSBA300134R0001 x Pole 1 kV 1

193 HSBA300132R0001 x Pole 2 kV 1

196 HSBR330128P0001 x Anti-sparks plate 2


420 HSHR430302P0001 x Switch 1

420

UR26-81/82S Wear & spare parts catalogue


File: f-UR26-8S_spc_en.fm F-49

F.4.3 Direct tripping device

02683

F.4.4 Closing device

02682


1200 Direct tripping device 1

HSBA200070R0300 x 2 to 5 kA

HSHR230035R0200 x 2 to 8 kA

HSBA200070R0200 x 1,4 to 2,7 kA


300 Closing device 1

HSBA100027R0700 x 24 / 48 V type E

HSBA100027R0600 x 24/ 48 V type M

HSBA100027R0900 x 32 / 64 V type E

HSBA100027R0800 x 32 / 64 V type M

HSBA100027R0500 x 36 / 72 V type E

HSBA100027R0400 x 36 / 72 V type M

HSBA100027R0300 x 110 / 220 V type E

HSBA100027R0200 x 110 / 220 V type M

330 HSBA300038R0001 x Fork unit 1

332 NB435160P0006 x Circlip 6 2

334 HSBA400158P0001 x Compression spring 1

370 SG100892R1 x Closing core 1

1200

334

370332

300

330


F-50 File: f-UR26-8S_spc_en.fm

Wear & spare parts catalogue UR26-81/82S

F.4.5 Arc chute

131305-6

F.4.6 Frame and accessories

110408-2

5803

58045805

5803

5805

58025805

5802

5806

81

82

5806


Arc chute type 81 - HSBA131305R000025802 HSBA231223P0001 x Upper de-ionizing plate 2

5803 HSBA231222P0001 x Lower de-ionizing plate 34

5804 HSBA231254P0001 x Lower intermediate de-ionizing plate 2

5805 HSBA432089P0001 x Baffle 37

5806 HSBA432105P0001 x 81 Horn 2Arc chute type 82 - HSBA131306R000025802 HSBA231223P0001 x Upper de-ionizing plate 4

5803 HSBA231222P0001 x Lower de-ionizing plate 54

5804 HSBA231254P0001 x Lower intermediate de-ionizing plate 2

5805 HSBA432089P0001 x Baffle 59

5806 HSBA432119P0001 x 82 Horn 2


710 HSBA300028R0100 x Pusher assembly 1

720 HSBA400213P0001 x Damper 1

720

710

UR26-81/82S Options


File: g-UR26-8S_options_en.fm G-51

G. Options

G.1 Varistor

G.1.1 DescriptionThis varistor (1) protects the closing device relays from the overvoltage that occurs when theclosing device (2) opens.

G.1.2 Trouble shoutingRemove both screws (3) to replace the varistor (1) as shown by the position label (4).

03662

G.1.3 Spare parts catalogueThe varistor type is determined according to the closing device voltage, in the following table:

Note! These numbers correspond to the varistors alone; they will be delivered with cables terminalsand mantle (SG101375R...).


Coil voltage U [VDC] Battery Rectified with 2 half-waves

24 SG101288P1 SG101288P1

36 SG101288P1 SG101288P4

48 SG101288P1 SG101288P2

72 SG101288P2 SG101288P14

96 SG101288P3 SG101288P5

110 SG101288P14 SG101288P8

220 SG101288P12 SG101288P9

VDR

VDR

1

32

4


G-52 File: g-UR26-8S_options_en.fm

Options UR26-81/82S

G.2 Indirect releases

G.2.1 DescriptionThe indirect releases reduce the mechanical opening time of the circuit-breaker when requiredby specific applications. Depending on the application, one of the three following indirectreleases has been selected according to Sécheron recommendations:

• BI24: the fork (5) is lifted by the upward movement of the plate (3).• BIM5 and BIM6: the fork (5) is lifted by the rotation of the plate (4). The colour of the BIM5

axis end (7) is black and the colour of the BIM6 axis end (7) is brass-yellow.The circuit-breaker can be remotely opened by a pulse sent to the coil (1 or 2), which actuatesthe plate (3 or 4), thereby lifting (13) the fork (5) and opening the moving contact (6). The BIM5and BIM 6 can be manually operated by pushing their axles (14).

02652

Important! When the circuit-breaker trips following an indirect release, the fork (5) remains inclosed position and need to be reset (18) to its open position by giving an “OFF”order to the closing coil.

BI24 BIM5 - BIM6

2

1

9

7

812

310

10

9

4

J

6

1314

5

4

J

6

5 18

183

13

11

26.51±0.5

UR26-81/82S Options



G.2.2 Maintenance - J clearanceRefer to the above figure.

J = 0,4 +0.3/-0 mm

This measurement is taken with the circuit-breaker closed.

Measure the J clearance between the fork (5) and the plate (3 or 4 with different shapesaccording to the type of direct release), using the recommended SG101425P1 Sécheron gauge(or a feeler gauge). If needed adjust the J clearance.

Adjustment

BI24 type indirect releasea) Loosen both screws (9).b) Lower or raise (11) the plate assembly (3) to adjust the J clearance.c) Tighten both screws (9).

BIM5 and BIM6 type indirect releasesa) Loosen both screws (8).b) Rotate (12) the shaft (4) until the proper J clearance is obtained.c) Tighten both screws (8).

G.2.3 Maintenance - In case of replacement of the direct releaseWhen removing the direct release in the § D.9:

• The BI24 indirect release can stay in its location. Watch to not loose the bushings around thethread of the screws (10).

• For BIM5 and BIM6 indirect releases: remove either the complete devices, either only theaxle (4) by loosing the screws (8).

G.2.4 Troubleshooting

Important! After the adjustment, at least two open/closing operations must be performed priorto rechecking the clearance to check that nothing interferes with the movement ofthe fork (1) as well as with its hooking on the catch (3).

Fault Possible causes Remedies See §

Circuit-breaker does not trip following an order.

1. Lever (4) does not rotateor plate (3) does not lift.

2. J clearance too wide.Adjust the J clearance and tighten the screw (8) or both screws (9).

G.2.2

Circuit-breaker does not close.

The lever (4) or plate (3) always lift the fork.



Options UR26-81/82S

G.2.5 Spare and wear parts catalogue

BIM5 and BIM6

03673

BI24

03673

Pos. Part number WP SP Description Qty1280 HSBA131233R0001 DECLENCHEUR IND BIM5 11290 HSBA131233R0004 DECLENCHEUR IND BIM6 16 HSBA431837P0001 ROD ROUND 12x195-PA6.6 GF30 131 HSBA432291P0001 SPACER CY IE M6/13x19 BIM-SS4305 132 GON336152P0422 WASHER ELA S 8-ST PHOS B 134 SG101204P1 PIPE 9x1.5 NITRILE 100m-NBR 65ShA 1

Pos. Part number WP SP Description Qty250 HSBA031173R0001 Indirect release typ BI 24 11 HSHR330008R0001 BODY WITH COIL BI24 12 HSBA431964R0001 PLATE BI24 ASSEMBLY 16 HSHR430016P0001 SPRING LAM 35x0.4x145 FLAT-SP ST 17 HSBA431312R0001 CORNER 40x30x20 WITH ENSAT INSERT ASM 2

20 SC200006 SCR SOHC M5x20-ST12.9-DIN912-BN1419 DACRO 2

346

3231

12801290

6

721

252324 22

20

1250

2

UR26-81/82S Options



21 GON336152P0419 WASHER ELA S 5-ST PHOS BLACK 222 9ADA123-11 SCR HEX CAP M5x12-SS A4-DIN933 223 HSBA432099P0001 WASHER FLAT 5.1/20x1.5-ST ZNP-BN732 2

24 HSBA432098P0001 WASHER SERRATED LOCK DD5.1/17.9-ST-BN783 2

25 HSBA432097P0001 WASHER SERRATED LOCK A 5.1/9-ST-DIN6798A 2




Options UR26-81/82S

G.3 Wiping contact

The wiping contact option is present when you see the screw heads (9) and the dampers (1).

G.3.1 DescriptionThis wiping contact applies a slight wiping movement to the main contact.

Two mechanisms operate these actions:

• The three dampers (1) inserted in the cover (2) of the closing device (3) allow the flange (4) tomove quicker.

• On the lower connection (6), two springs (7) pushes the pin (8) of the moving contact (5) tothe other end of the oblong groove (11), enabling the moving contact (5) to open with a wipingmovement.

02657

G.3.2 MaintenanceTo remove the moving contact (5) at the point d) of the procedure D.8.1 "Replacement of themoving contact assembly", first unscrew both screws (9) and completely remove bothassemblies (7,9,10).

To reassemble, insert the screws (9) into the sleeves (10) with the springs (7), pass bothscrews (9) through the pin (8) and tighten them into the lower connection (6).


03658


127-AC HSBA432736P0002 x Spring AC 2

300-AC Closing device AC 1

SG100395R0700 x 24 / 48 V type E

SG100395R0600 x 24/ 48 V type M

SG100395R0900 x 32 / 64 V type E

SG100395R0800 x 32 / 64 V type M

SG100395R0500 x 36 / 72 V type E

SG100395R0400 x 36 / 72 V type M

SG100395R0300 x 110 / 220 V type E

SG100395R0200 x 110 / 220 V type M

324-AC SG100808R1 x Cover-AC 1

1

4

3

6 3

255 10

6 8 7 9

11

127-AC 300-AC 324-AC

UR26-81/82S Options



G.4 Direct release type DE

G.4.1 Description• Easy access to the trip setting • Easy reading of the trip setting value on an amperes graduated scale.• Easy change of the trip setting value by the customer. • Same mechanical performance (Tmec) as the standard direct release.

Main setting ranges

G.4.2 Maximum current release (Id) settingsTwo different settings are performed:

A. The setting of the main range is done by Sécheron by means of the nut (1) and counternut (2), which are tightened at the factory.

B. The thin regulation, by step of 200 A, is performed by the customer on the side of the circuit-breaker:– Loosen the nut (4) with a 19 mm flat key (7).– Turn the screw (5) with a 5 mm Allen key (8) until the marker (6) reaches the desired

value on the scale (3); turn clockwise to rise the lds value and counter clockwise to lowerit.

– Hold the screw (5) to tighten the nut (4) with a tightening torque of 30 Nm.

03664

G.4.3 MaintenanceSee § D.13 "Replacement of the direct release".

Important! When the circuit-breaker trips following a direct release, the fork remains inclosed position and need to be reset to its open position by giving an “OFF”order to the closing coil.

Variant DE 1 DE 2 DE-3 DE 4Setting ranges 2 – 5 kA 4 – 8 kA 6 – 10 kA 9 – 15 kA

Important! The customer is not allowed to change this setting.

36

A B12

4 5

8

7



Options UR26-81/82S


03669

G.5 Manual closing device

G.5.1 DescriptionMounted at the rear of the closing device (1), the manual closing device (2) enables the customerto close the circuit-breaker manually.

G.5.2 Maintenance

Removalc) Remove the four screws (1) holding the flange (2) and the cover (3).

d) Remove the complete manual closing device (5).e) Remove the cylinder (6) and cover (3).

Reassemblingf) Insert the cover (3), taking care that the flange (4) does not move.g) Hold the cover (3) and insert the cylinder (6) with its spring (7) and insert the manual closing

device (5).h) Screw the unit together with the four M6 screws (1), taking care that the flange (4) does not

move: hold the cover (3) firmly in this position and turn the manual closing device (5) until thepivot (8) and the lever (9) can be operated vertically from top to bottom.

i) Tighten the four M6 screws (1) to a torque of 9 Nm.

03632-1

Pos. Part number WP SP Description Qty1200 SG101522R0300 x SPRING TRIPPING DEVICE 2 - 5 kA 1

SG101522R0400 x SPRING TRIPPING DEVICE 4 - 8 KA 1

1250

Important! Do not change the position of the flange (4) while working.Mark its position with a felt-tip pen before removing the moving core assembly.

3

24

5 12673

8 91 5

UR26-81/82S Options



G.5.3 Spare part catalogueRefer to the figure above.

G.6 Over current release indicator & contact wear indicator

These options can be connected to the low voltage connector only if the auxiliary switches are in“type U changeover” configuration (see § C.10 "Low voltage connections").

G.6.1 Description

Over current release indicatorAttached to the rear of the closing coil (1), the over current release indicator (2) counts thenumber of times the circuit-breaker is tripped by an overcurrent release.

The coil shaft moves a plate (3) and actuates the switch (4) each time the direct or indirectrelease is activated.

Contact wear indicatorAttached to the rear of the closing coil (1), the contact wear indicator (2) indicates that the maincontacts are reaching their maximum acceptable value for wear and must therefore be changed.

The coil shaft moves a plate (3) each time the direct or indirect release is activated and actuatesthe switch (4) when the maximum wear has been reached.

G.6.2 Installation

Connecting diagram

03665

G.6.3 Maintenance When changing the option, hold the fork (5) with pliers (6) to loose or tighten the screw (7).

02660

Pos. Part number SP Description Qty

9 HSBR430708P0001 x Lever 1

161817

1

2

3

4420

75

6



Options UR26-81/82S

G.6.4 Spare parts catalogue

G.7 Manual release device: M3 type

Sécheron number of this complete kit: SG104224R00500.

G.7.1 DescriptionThe circuit-breaker can be manually tripped by pushing the rod (1).

Pressure on the rod (1) causes the plate (2) to rotate, which lifts the fork (3), and releases themoving contact (4).

02651

G.7.2 Maintenance - J clearance

J = 1,0 ±0.25 mm

Note! This measurement is taken with the circuit-breaker closed.

Measure the J clearance between the fork (3) and the plate (2), using a feeler gauge. If neededadjust the J clearance.

Adjustmenta) Loosen the screw (7).b) Rotate (8) the shaft (2) until the proper J clearance is obtained.

Note! The stroke (K) must be of 17± 2 mm.

c) Tighten the screw (7).

Pos. Part number SP Description Qty

420 HSBA400096P0001 Switch 1

Important! When the circuit-breaker trips following a manual release, the fork (3) remains inclosed position and need to be reset (18) to its open position by giving an “OFF”order to the closing coil.

2

3

2

87

21

5 18K

4

6

J

Important! After adjustment, at least two open/closing operations must be performed prior torechecking the clearance to check that nothing interferes with the movement of thefork (3) as well as with its hooking on the catch (5).

UR26-81/82S Options



G.7.3 Trouble shooting

G.8 Position indicator

G.8.1 DescriptionAttached to the rear of the auxiliary contacts (1), the position indicator (2) shows whether thecircuit-breaker is open or closed. It is actuated by the pusher (3). When the indicator is red the circuit-breaker is closed, and when the indicator is green the circuit-breaker is open.

02661

Fault Possible causes Remedies See §Circuit-breaker does not manually release

1. The lever (12) does not rotate.2. J clearance is too wide.

Adjust the J clearance and tighten the screw (10).

G.2.2

Circuit-breaker does not close The lever (12) always lift the fork

1 1

2

32

Loop Breaker Manual

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