INSTALLATION Westinghouse 1. L 41-663. 2A

• OPERATION • MAINTENANCE

INSTRUCTIONS

TYPE SGR-12 AUTOMATIC RECLOSING RELAY

CAUTION Before putting relays into service, remove

all blocking which may have been inserted for the

purpose of securing the parts during shipment, make

sure that all moving parts operate freely, inspect

the contacts to see that they are clean and close

properly, and operate the relay to check the settings

and electrical connections.

APPLICATION

* The type SGR-12 Reclosing relay provides an

instantaneous reclosure of an electrically operated

circuit breaker, and automatically resets itself if the

breaker remains closed for a predetermined adjustable

time interval. If the breaker re-trips before the end

of this interval the resetting operation of the relay

is interrupted until the breaker is manually closed.

Thus the reclosing relay is applicable to either

attended or non-attended stations. The SGR-12 relay

is also available with two timing units for applica­

tions where it is desired to delay reclosing.

CONS TRUCTION AND OPERATION

The type SGR-12 relay consists of one or two

synchronous motor operated time-delay unit and a

toggle unit.

The time-delay unit, consists of a 600 R.P.M.

(for 60 cycles) synchronous motor driving a contact

arm through a gear train. A bridging contact member

on the end of the contact arm closes a circuit through

two stationary contact studs at the end of the time

scale. The starting position, and length of travel of

the contact arm is determined by the position of an

adjustable stop, which can be set with reference to

a scale on the upper gear plate by loosening the upper

bearing screw of the last gear shaft and moving the

stop to the desired position. The time-delay for full

scale travel is approximately 92 seconds, and the

smallest scale division represents a delay of slightly

over 9 seconds.

When the motor is energized the armature is lifted

magnetically to a point where a pinion on the lower

SUPERSEDES I.L. 41-663.2 *Denotes Changes From Superseded Issue

end of the armature engages a gear on the motor

countershaft. When the motor is de-energized this

pinion de-meshes, and by this reduction of the re­

setting load on the spring which is a part of the final

shaft assembly much faster resetting of the contacts

is obtained.

A resistor is connected in series with the motor

coil for 240 volt operation and by-passed for 120 volt

operation. The motor coil circuit is connected at the

factory for 240 ·volt service.

The toggle unit consists of two electromagnets,

with a common armature having two pins resting in a

groove in the molded base. The other end of the

armature is held in one of two positions by means of

a toggle spring which produces the toggle action. The

spring is protected by a lock pin which may be left

in after installation. The moving contacts are mounted

at one end of the armature and the stationary contacts

are mounted on either side.

* The operation of the relay and related control

equipment may be followed by reference to Fig. 3 or

4. This diagram shows the condition previous to the

initial closing of the breaker by means of the control

switch. The toggle unit 79X is shown in the reset

position, with the back contact (the reclosing contact)

closed and the front contact (the reset contact) open.

Fig. 6 shows the external connections when using

the two timer SGR-12.

The breaker is closed by the control switch

contact 10 1-C through the circuit consisting of the

52X coil and the cut-off relay 52Y back contact. When

52X contact closes, the closing coil 52C and the

operating coil 79X-O of the toggle element are ener­

gized. Relay 79X performs its main function of open­

ing the circuit to relay 52X so as to prevent a second

reclosure should the breaker immediately open. The

breaker closes and the toggle unit front contacts

79/X1 close, starting the 79M timer. If the breaker

has not been closed on a fault, the 79M timer contact

will close and the reset coil 79X-R will operate,

which closes the 79/X2 back contact in preparation

for an immediate reclosure should a subsequent fault

EFFECTIVE NOVEMBER 1965 www . El

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Fig. 1. Type SGR-12 Reclosing Relay Without Case. 1- Timer Contacts. 2-Reset Coil. 3-MotorResistor. 4- X1 Contact. 5 - Operating Coil. 6 - X3 Contact. 7 - X2 Contact.

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TYPE SGR-12RELAY __ ----------------------------------------------------�· ·�L�--4 1-- 6•6=3-�2A

LOWEI 1..11. CO.. TACT (F, �.)

FIOIIT TERM. FOR z .. v.o.c. All[) 120 V.A.C.

RUR TEIIM. fOR 168-U!iY,D.C. AIID21K!V,A.C.

lOTE-COMTACTS SHOWII Ill RESET POSITIOI

INTERNAL SCHEMATIC

RESET COl L L.�. COIL (F. V,)

OPEitATIIUi COIL R.K. COIL (F.Y.)

r--t---+----1--RESISTOR (21M� 'C.U. AS SIKIWM. SKOA.TEOOUT FOR120Y,A.t.)

TEST SWITCH

TUMIIAL

184A246

Fig. 2. Internal Schematic of the Type SGR-12 Relay in the Type FTJ J Case.

occur. As in the usual X-Y scheme, the closing of the

breaker through the auxiliary switch 52-aa operates

the breaker cut-off relay 52Y, which disconnects the

52X coil.

The breaker is now in the closed position with

the relay and control circuit de-energized. When a

fault occurs the circuit breaker is tripped open, and

the breaker auxiliary switches 52bb and 52LC are

closed. Due to the fact that- the 79/X2 back contact

is already closed, the closing cycle will take place

immediately. Should the breaker fail to stay in after

this one reclosure, it will have tripped out before the

79M timer has closed its contacts to reset the toggle

element, because the timer is always set for a longer

time than the sum of the protective relay and breaker

tripping times. In this case where the toggle element

is not reset, the breaker will not close again auto­

matically because the 79/X2 contact to 52X is open.

To close the breaker it is necessary to use the con­

trol switch 101-C.

Where a 52X make contact is not available from

the breaker for energizing the 79X-R coil, a separate

52X relay is required. A type MG-6 relay is recom­

mended for this purpose. However, note that the

circuit breaker must provide a contact to seal around

the 79/X2 break contact to prevent the closing cir­

cuit from being prematurely interrupted. This sealing

contact should close prior to the closing of the 52X

contact.

CHARACTERIS TICS

There are two type SGR-12 Reclosing relays

which are rated as follows:

Toggle Unit 1:::.

120-240 V 60 cycles or

24-125 v.d.c.

250 v.d.c.

Motor

120/240 V 60 cycles t

120/240 V 60 cycles t

t Motor coil resistor is by-passed for 120 volt opera­

tion.

1:::. The toggle unit is supplied with tapped coils.

For 24 v.d.c. and 120 V 60 cycles, the upper ter­

minals and lower front terminals are used(F.V.).

For 48-125 v.d.c. and 240 V 60 cycles, the upper

terminals and lower rear terminals. are used (F. V.).

* The timer has a max. setting of 92 seconds. The

small scale division is approximately 9 seconds

(normal setting is usually 9 to 18 seconds).

A timer is available where a reset time of less

than 10 seconds but more than 1 second is required.

Each of the 10 small scale divisions represents

approximately 1 second. Where a very accurate set­

ting is desired, the time interval should be checked

with an electronic timer and the position of the back­

stop adjusted for the exact time required.

The time for the contact arm to return to its ini­

tial position after an operation is approximately 20%

or less of the closing time, with tli.e higher per cent applying to settings of one to two sc.ale divisions.

The reclosing contacts will carry 5 amperes

continuously. They will interrupt 3 amperes at 125

volts d-e in a non-inductive circuit or 30 amperes at

120 volts a-c.

INS TALLATION

The relays should be mounted on switchboard

panels or their equivalent in a location free from

dirt, moisture, excessive vibration, and heat. Mount

the relay vertically by means of the four mounting

holes on the flange for semi-flush mounting or by

means of the rear mounting stud or studs for projec­

tion mounting. Either a mounting stud or the mounting

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TYPE SGR-12RELAY ______________________________________________________ ___

8

t-IIWEN SYM. SW. SUPERVISES 101/C COMTACT, AM EXTU 10 1/T CONTACT IS IEEDED AS SHOWN.

79 8 79 2 79

r 79 3 52

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U • AUTOMATIC OPERATION CUTOUT SW. 'ISS- SYICHRONl! IIG SWITCH 52 • CIR. BKR. AUX. SW.·OPEN

• WHEH BKR. IS OPEN 52 • CIR.BRK. AUX. SW.-CLOSEO

0 WHEN B�R. IS OPEH 52 - CIR. BKR. AUX. SW.·CLOSED •a IN OPER. POSITION 52 • CIR. BKR. AUX. SW,•OPEM bb IH OPEII. POSITION S2 - LATCH CNECK SWITCH LC 52- Clll. BU. CLOSING COIL

c S2 • 111(11. CONTROL RELAY

X 52 • BKR. CUTOFF RELAY

y 79 • �������=

1�ECLOS lNG RELAY,

79 • ThiER UNIT OF TYPE SGR-12 RELAY II

79 - OPERATING COIL OF TOilGLE X•O �NIT OF TYPE SGR-12 RELAY

79 - RESET COl L OF TOGGLE X·R UNIT OF TYPE SGR-12 RELAY

sg - BUS LOCKOUT RELAY

101 - COITROL SWITCH

184A952 """ Fig. 3. External Schemc;rtic of the Type SGR-12 Relay for Immediate Reclosure of a Breaker with DC Control.

screws may be utilized for grounding the relay. The

electrical connections may be made directly to the

terminals by means of screws for steel panel mount­

ing or to the terminal studs furnished with the relay

for thick panel mounting. The terminal studs may be

easily removed or inserted by locking two nuts on the

stud and then turning the proper nut with a wrench.

For detailed FT case information refer to I.L.

41-076.

Before placing the relay in service, the motor

coil resistor should be shorted out when using 120

volt source.

ADJUS TMENTS AND MAINTENANCE

The proper adjustments to insure correct opera­

tion of this relay have been made at the factory and

should not be disturbed after receipt by the customer.

If the adjustments have been changed, the relay taken

apart for repairs, or if it is desired to check the

adjustments at regular maintenance periods, the

instructions below should be followed.

4

CAUTION: Before energizi'TI{J the motor circuit check the resistor connection. The resistor is connected at the factory for 21/) volt a.c. service, arui shotdd be by-passed for 120 volt a.c. operation. Also, check toggle 'llfllit coil connections as described ti!IUier "Characteristics."

The contact travel of the timing unit determines

the time delay, which must be adjusted to meet the

requirements of the particular application. The bear­

ing screw at the upper end of the last gear shaft is

used to clamp a stop for the contact arm in position.

The stop should be located so that the index mark on

the contact arm has the desired position with refer­

ence to the scale, and the bearing screw then should

be tightened securely.

In case the synchronous motor should be removed

from its mounting plate, it should be reassembled so

that the mesh of the motor countershaft pinion with

its associated gear is about 2/3 of the depth of the

gear teeth. One of the motor mounting screw holes has

sufficient clearance to permit slight adjustment of

the gear mesh. In case the motor should be damaged,

the recloser should be returned to our Works for

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TYPE SGR-12RELAY ____________________________________________________ �1-�L�- �41�-6�6�3-�2A

t-IIIIEII SYI. SW. IUPEIY ISES 101/ C COIUCT, All EXTIA 10 1/ T COITlCT IS IEEDED lS SHOW.

DEY ICE IUMI£R CURT

8 • COITIOL POWER 811 TCH

•a · AIITUIClTIC OPEIITIOI CUTOUT SW. US· STICIIOIIZIH SWITCH �2 • CIR. Ill. AUX. SW.•OPEN

a WHEN BKR. IS OPEJI 52 • CIR. 8KR. AUX. SW.·C�OSED

b WHEN iKR. IS OPEN SZ • CIR. SKR. AUX. SW--C�OSED u IN OPEK. POSI liON

!iZ • CIR. SlR. AUX. sw.•OPEN bo IN OPER. POSITION !;2 • UTCK CHECK SfiTCH �c

52 • CIR. BKR. C�OSING COl� c

!iZ • 8KR. CONTRO� RE�AY X

!;2 • BKR. CUTOFF REUY y

79 • AuTOMATIC REC�OSING REUY, TYPE SGR-12

79 · TIMER UNIT Of TYPE SGR•12 REUY M

79 • OPERA Tl NG CO I� Of TOGG�E X·O UNIT Of TYPE SGR·12 REUY 79 • RESET COJ � Of TOGG�E X·R UNIT Of TYPE S6R·12 REUY a: " BUS LOCKOUT RELAY

101 • COITIOL Sll TCH

184A953

Fig. 4. External Schematic of the Type SGR-12 Relay for Immediate Rec/osure of a Breaker with AC Control.

repair, or a complete replacement motor should be

installed.

If the SX Toggle Unit has been dismantled, it is

necessary to check the toggle action and the contact

follow after reassembling it. Set the gap between the

lower pole pieces at 11/64". The contact follow

should be set at .037". This may be obtained by

adjusting the stationary contacts to just make when

there is an .020" gap between the residual pin in the

armature, and the upper pole pieces. The adjusting

screw assembly should be pushed down until there is

enough tension to cause the residual pin to rest

against the pole piece. With the lock nut tightened,

adjust the adjusting screw until there is equal toggle

pressure on each side. This may be done mechanically

with a gram gage and should be 58 grams when mea­

sured between the rivits of the moving contact. This

may also be done electrically by energizing the

coils. If correctly adjusted, the unit will operate

without chattering at 80% rated voltage.

All contacts should be cleaned periodically. A contact burnisher S1t182A836H01 is recommended for

this purpose. The use of abrasive material for clean­

ing contacts is not recommended, because of the

danger of embedding small partiCles in the face of

the soft silver and thus impairing the contact.

RENEWAL PARTS

Repair work can be done most satisfactorily at the factory. However, interchangeable parts can be

furnished to the customers who are equipped for

doing repair work. When ordering parts, always give

the complete nameplate data.

ENERGY REQU IREMENTS

The timer motor current is approximately 23 milli­

amperes at rated voltage, and at 120 volts the burden

is 2. 75 v .a. The toggle unit coils of the recloser

rated at 120-"240 v.a.c. and 24-125 v.d.c. have the

following burdens:

24 VDC

48 VDC

125 VDC

120 VAC

240 VAC

12.5 watts

15 watts

100 watts

140 VA open gap - 130 closed

80 VA open gap - 65 closed

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TYPESGR-12RELAY _________________________________________________________ _

� 0 > 10 N

6

79

$,' 9 R

79 M I •

79 4

LOWER R.M. COITACT( F. Y. )

LOWER L.H. -------r-­COITACT (F.Y.)

REAR TEIIII. FOR 111·125 v.o.c. AID 2110 J.A.C.

RESISTOR (2110 Y.A.C. AS • SNOWII, SHOIT OUT FOR 120 J.A.C.)

INTERNAL SCHEMATIC

RESET COIL L.H. COIL (F.Y.)

OPERAT 116 COIL R.N. COIL (F.Y.j

UPPER R. H. COITACT (F.Y.)

UPPER L.H. COITACT (F. Y.)

TIMER UIITS

LOWER

185A559 * Fig. 5 Internal schematic of the Type SGR-12 Relay

with two timing units.

DEVICE N U MBER CHART

79

L 8 -CONTROL POWER SWITCH TO 43 -AUTOMATIC OPERATION CUTOUT

435- SYNCH.RONIZ lNG SWITCH 52 -CIR.BKR.AUX.SW.-OPEN

a. WHEN BKR. IS OPEN 52 101 52 -CIR .BKR.AUX. SW.- CLOSED X

r 4:S

X 43 b WHEN BK R.IS OPEN 52 - CIR.BKR. AUX. SW.- CLOSED a.o. IN OPER. POSITION

t 52 - CIR.BKR.AUX.SW.- OPEN bb IN OPER. POSITION

52 -LATCH CHECK SWITCH LC

en 52 -CIR. BKR. CLOSING COIL w ..J c (.) >- 52 -BKR. CONTROL RELAY

79 79 (.) X XI X4 0 52 -BKR. CUTOFF RELAY c/) y

sw.

79 79 > 79 -A UTOMATIC RECLOSING RELAY 0

79 7

t- WHEN SYN. SW. SUPERVISES 101/C C ONTACT, AN EXTRA 101/T CONTA CT IS N EE DED AS SHOWN .

Ml

5 2 a.

M2 '<t N

52 b

TYPE SGR-12 79 -TIMER UNIT OF TYPE SGR -12 M REL AY 79 -OPER ATING C O IL OF TOGGLE

X-0 UNIT OF TYPE SGR-12 RELAY 7 9 -RESET COIL OF TOGGLE

X-R UNIT OF TYPE SGR-12 RELAY 86 -BUS LOCKOU T RELAY

B 101 -�ONTROL SWITCH

185A571 Fig. 6 External Schematic of the Type SGR-12 Relay with time delay on reclosing.

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TYPE SGR-12RELAY _______________________________________________________________________________________________________________________________ �•�.L�·�4 �1-6�6�3.�2

TEIIMIIIAL MD NOUIITIIIG-DETAILS

.190-32 SCREW

5 - 18 SCREW 16 (FOil TIIICK PANEL USE

�18 STUD) 16 .190-32 SCREW

9 Te

I

{ 91L ;- DIA.IJ MOLES FOR

5 - .. • 190-32 MTG.SCREWS

2 �� � 32 �

t -------,-

PAIIEL CUTOUT & ORILLIIIG FOit SEMI-FLUSH MTG.

P:LOT PLATE 51./�P} ON R.ELA.Y (TAB WHEN USED TO RE.A.R..)

lo4---"".,..------- sl ----1w 8

PANEL DRILLING 011 CUTOUT FOR PIIOJfCTION MTG.

(FIIOIIT VIEW)

TERMINAL NUMBER

57-D-7900

* Fig. 7. Outline and Drilling Plan for the Type SGR-12 Relay in the Type FT11 Cose.

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WESTINGHOUSE ELECTRIC CORPORATION RELAY-INSTRUMENT DIVISION NEWARK, N. J.

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INSTALLATION Westinghouse t.L 41-663.2

• OPERATION • MAINTENANCE

INSTRUCTIONS

TYPE SGR-12 AUTOMATIC RECLOSING RELAY

c AuT 1 oN Before putting relays into service, remove

all blocking which may have been inserted for the

purpose of securing the parts during shipment, make

sure that all moving parts operate freely, inspect

the contacts to see that they are clean and close

properly, and operate the relay to check the settings

and electrical connections.

APPLICATION

The type SGR-12 Reclosing relay provides an

instantaneous reclosure of an electrically operated

circuit breaker, and automatically resets itself if the

breaker remains closed for a predetermined adjustable

time interval. If the breaker re-trips before the end

of this interval the resetting operation of the relay

is interrupted until the breaker is manually closed.

Thus the reclosing relay is applicable to either

attended or non-attended stations.

CONS TRUCTION AND OPERAT ION

The type SGR-12 relay consists of a synchronous

motor operated time-delay unit and a toggle unit.

The time-delay unit, consists of a 600 R.P.M.

(for 60 cycles) synchronous motor driving a contact

arm through a gear train. A bridging contact member

on the end of the contact arm closes a circuit through

two stationary contact studs at the end of the time

scale. The starting position, and length of travel of

the contact arm is determined by the position of an

adjustable stop, which can be set with reference to

a scale on the upper gear plate by loosening the upper

bearing screw of the last gear shaft and moving the

stop to the desired position. The time-delay for full

scale travel is approximately 92 seconds, and the

smallest scale division represents a delay of slightly

over 9 seconds.

When the motor is energized the armature is lifted

magnetically to a point where a pinion on the lower

NEW INFORMATION

end of the armature engages a gear on the motor

countershaft. When the motor is de-energized this

pinion de-meshes, and by this reduction of the re­

setting load on the spring which is a part of the final

shaft assembly much faster resetting of the contacts

is obtained.

A resistor is connected in series with the motor

coil for 240 volt operation and by-passed for 120 volt

operation. The motor coil circuit is connected at the

factory for 240 ·volt service.

The toggle unit consists of two electromagnets,

with a common armature having two pins resting in a

groove in the molded base. The other end of the

armature is held in one of two positions by means of

a toggle spring which produces the toggle action. The

spring is protected by a lock pin which may be left

in after installation. The moving contacts are mounted

at one end of the armature and the stationary contacts

are mounted on either side.

The operation of the relay and related control

equipment may be followed by reference to Figs. 3 or

4. This diagram shows the condition previous to the

initial closing of the breaker by means of the control

switch. The toggle unit 79X is shown in the reset

position, with the back contact (the reclosing contact)

closed and the front contact (the reset motor contact)

open.

The breaker is closed by the control switch

contact 101-C through the circuit consisting of the

52X coil and the cut-off relay 52Y back contact. When

52X contact closes, the closing coil 52C and the

operating coil 79X-O of the toggle element are ener­

gized. Relay 79X performs its main function of open­

ing the circuit to relay 52X so as to prevent a second

reclosure should the breaker immediately open. The

breaker closes and the toggle unit front contacts

79/X1 close, starting the 79M timer. If the breaker

has not been closed on a fault, the 79M timer contact

EFFECTIVE JULY 1960 www . El

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Fig. 1. Type SGR-12 Reclosing Relay Without Case. 1- Timer Contacts. 2-Reset Coil. 3-Motor Resistor. 4- X1 Contact. 5 -Operating Coil. 6 - X3 Contact. 7 - X2 Contact.

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TYPE SGR-12RELAY ______________________________________________________ �t�.L�-�4�1-�66�3-�2

LOWER L.�. COMTACT(F,'I.)

fiiOftTTERM. FOR HY.O.C. AIIO 120'1.A.C.

RUR TERM. FOR �8-125 Y .D.C. AliD 2�0 'l. A.C.

UPPERR.II. CONTACT (F.Y.)

ltOTE-COIHACTS SHOWII Ill RESET POSITIOii

INTERNAl SCHEMATIC

----._RESET COIL L.H. COIL(f.'t.)

----..OPERATIMGCOIL R.H. COIL(F.'t,)

TIMER LIMIT

184A246

Fig. 2. Internal Schematic of the Type SGR-12 Relay in the Type FT11 Case.

will close and the reset coil 79X-R will operate,

which closes the 79/X2 back contact in preparation

for an immediate reclosure should a subsequent fault

occur. As in the usual X-Y scheme, the closing of the

breaker through the auxiliary switch 52-aa operates

the breaker cut-off relay 52Y, which disconnects the

52X coil.

The breaker is now in the closed position with

the relay and control circuit de-energized. When a

fault occurs the circuit breaker is tripped open, and

the breaker auxiliary switches 52bb and 52LC are

closed. Due to the fact that the 79/X2 back contact

is already closed, the closing cycle will take place

immediately. Should the breaker fail to stay in after

this one reclosure, it will have tripped out before the

79M timer has closed its contacts to reset the toggle

element, because the timer is always set for a longer

time than the sum of the protective relay and breaker

tripping times. In this case where the toggle element

is not reset, the breaker will not close again auto­

matically because the 79/X2 contact to 52X is open.

To close the breaker it is necessary to use the con­

trol switch 101-C.

Where a 52X make contact is not available from

the breaker for energizing the 79X-R coil, a separate

52X relay is required. A type MG-6 relay is recom­

mended for this purpose. However, note that the

circuit breaker must provide a.contact to seal around

the 79/X2 break contact to prevent the closing cir-

cuit from being prematurely interrupted. This sealing

contact should close prior to the closing of the 52X

contact.

CHARACTERIS TICS

There are two type SGR-12 Reclosing relays

which are rated as follows:

Toggle Unit 6

120-240 V 60 cycles or

24-125 v.d.c.

250 v.d.c.

Motor

120/240 V 60 cycles t

120/240 V 60 cycles t

t Motor coil resistor is by-passed for 120 volt opera­

tion.

6 The toggle unit is supplied with tapped coils.

For 24 v.d.c. and 120 V 60 cycles, the upper ter­

minals and lower front terminals are used(F.V. ).

For 48-125 v.d.c. and 240 V 60 cycles, the upper

terminals and lower rear terminals are used (F. V.).

The timer has a max. setting of 92 seconds. The

small scale division is approximately 9 seconds

(normal setting is usually 9 to 18 seconds).

The reclosing contacts will carry 5 amperes

continuously. They will interrupt 3 amperes at 125

volts d-e in a non-inductive circuit or 30 amperes at

120 volts a-c.

INS TALLATION

The relays should be mounted on switchboard

panels or their equivalent in a location free from

dirt, moisture, excessive vibration, and heat. Mount

the relay vertically by means of the four mounting

holes on the flange for semi-flush mounting or by

means of the rear mounting stud or studs for projec­

tion mounting. Either a mounting stud or the mounting

screws may be utilized for grounding the relay. The

electrical connections may be made directly to the

terminals by means of screws for steel panel mount­

ing or to the terminal studs furnished with the relay

for thick panel mounting. The terminal studs may be

easily removed or inserted by locking two nuts on the

stud and then turning the proper nut with a wrench.

For detailed FT case information refer to I.L.

41-076.

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TYPE SGR-12RELAY __ __ __ __________________________________________________ __

79 6

79 7

t-1114EH SYI. SW. SUPEIVI SES 101/ C COITACT, All Em A 10 1/T COITACT IS IEEDED AS SHOWN.

79 8 79 2 79

r 79 3 52

a

"' .., <::; >-'-' 0 "'

,; � "'

DUlCE: IUIIIER CUlT

8 - COITIOL POWER SWITCH U - AUTOIIAllC OPERATION CUTOUT SW. 1135- SYICHROI1 Z 116 SWITCH 52 • Cl�. 8KR. AUX. SW.·OPEN

a II'HE14 BKR. IS OPEN 52 • C I R. BRK. AUX. Sill. -CLOSED

b WHEN BKR. IS OPEN o2 - CIR. BKR. AUX. SW. -CLOSEO u IN OPER. POSITION 52 • CIR. BU. AIIX. SW.•OPEM bb 114 OPEi. POSITION o2 • LATCH CMECK SWITCH LC 52 · CIR. BU. CLOSIMG COIL

c o2 • III(R. CONTROL RELAY

X 52 • BKR. CUTOFF RELAY

y 79 • ��������1�ECLOS lNG RELAY,

79 • TII4ER UNIT OF TYPE SGR-12 RfLAY 14

79 • OPERATING COIL OF TOilGLE X·O �NIT Of TYPE SGR-12 RELAY

79 - RESET COIL OF TOGGLE X·R UNIT OF TYPE SGR-12 RELAY

8� - BUS LOCKOUT REUY 101 - COITROL SWITCH

184A952

Fig. 3. External Schematic of the Type SGR-12 Relay for Immediate Reclosure of a Breaker with DC Control.

Before placing the relay in service, the motor

coil resistor should be shorted out when using 120

volt source.

A DJUS TMENTS A ND MA INTENANCE

The proper adjustments to insure correct opera­

tion of this relay have been made at the factory and

should not be disturbed after receipt by the customer.

If the adjustments have been changed, the relay taken

apart for repairs, or if it is desired to check the

adjustments at regular maintenance periods, the

instructions below should be followed.

CAUTION: Before energizing the motor circuit check the resistor connection. The resistor is connected at the factory for 2¥J volt a.c. service, and should be by-passed for 120 volt a.c. operation. Also, check toggle 'lllflit coil crm:nections as described 'IJJIUier "Characteristics."

The contact travel of the timing unit determines

the time delay, which must be adjusted to meet the

requirements of the particular application. The bear-

4

ing screw at the upper end of the last gear shaft is

used to clamp a stop for the contact arm in position.

The stop should be located so that the index mark on

the contact arm has the desired position with refer­

ence to the scale, and the bearing screw then should

be tightened securely.

In case the synchronous motor should be removed

from its mounting plate, it should be reassembled so

that the mesh of the motor countershaft pinion with

its associated gear is about 2/3 of the depth of the

gear teeth. One of the motor mounting screw holes has

sufficient clearance to permit slight adjustment of

the gear mesh. In case the motor should be damaged,

the recloser should be returned to our Works for

repair, or a complete replacement motor should be

installed.

If the SX Toggle Unit has been dismantled, it is

necessary to check the toggle action and the contact

follow after reassembling it. Set the gap between the

lower pole pieces at 11/64". The contact follow

should be set at .037". This may be obtained by

adjusting the stationary contacts to just make when

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TYPE SGR-12RELAY ____________________________________________________ �•·=L.�4�1-�6�63�.2

t-WMEII SYM. SW. SUPEIYISES 101/C COITACT, Ml EXTIA 101/T COITACT IS UEDED AS SHOW.

DEJI CE NUIIIER CURT

8 - COITROL POWER SWtTCH

•a - AUTUIIlTIC OPEilTlON CUTOUT SW. US- SJICIIDillllt SWITCH 52 • CIR. 8KI. AUX. SW.•OPEN

a WHEN 8KR. IS OPEN

52 • C IR. iKR. AUX. SW.·CLOSED b wHEN iKR. IS OPEN

52 • CIR. iKR. AUX. SW. ·CLOSEO aa IN OPER. POSI Tl ON 52 • C IR. B�R. AUX. sw.-OPEN bo IN OPER. POS ITION >2 • UTCH CHECK Slfl TCH LC

52 • C IR. BKR. CLOS ING COIL c

52 • BKR. CONTROL RELAY X

>2 • BKR. CUTOFF REUY y

79 - AUrllMATIC RECLOSING RELAY,

TYPE SGR-12 79 • TI .. ER UNIT OF TYPE SGR-12 RELAY

M

79 - OPERATING COIL OF TOGGLE X·O UNIT Of TYPE SGR-12 RELAY 79 - RESET COIL OF TOGGLE

X-R UNIT OF TYPE SGR-12 REU Y s: · BUS LOCKOUT RELAY

10 1 - COITROL SIITCH

184A953

Fig. 4. External Schematic of the Type SGR-12 Relay for Immediate Reclosure of a Breaker with AC Control.

there is an .020" gap between the residual pin in the

armature, and the upper pole pieces. The adjusting

screw assembly should be pushed down until there is

enough tension to cause the residual pin to rest

against the pole piece. With the lock nut tightened,

adjust the adjusting screw until there is equal toggle

pressure on each side. This may be done mechanically

with a gram gage and should be 58 grams when mea­

sured between the rivits of the moving contact. This

may also be done electrically by energizing the

coils. If correctly adjusted, the unit will operate

without chattering at 80% rated voltage.

All contacts should be cleaned periodically. A

contact burnisher S#182A836HO 1 is recommended for

this purpose. The use of abrasive material for clean­

ing contacts is not recommended, because of the

danger of embedding small partiCles in the face of

the soft silver and thus impairing the contact.

RENEWAL PARTS

Repair work can be done most satisfactorily at

the factory. However, interchangeable parts can be

furnished to the customers who are equipped for

doing repair work. When ordering parts, always give

the complete nameplate data.

ENERGY REQU IREMENTS

The timer motor current is approximately 23 milli­

amperes at rated voltage, and at 120 volts the burden

is 2.75 v.a. The toggle unit coils Of the recloser

rated at 120-"240 v.a.c. and 24-125 v.d.c. have the

following burdens:

24 VDC

48 VDC

125 VDC

120 VAC

240 VAC

12.5 watts

15 watts

100 watts

140 VA open gap - 130 closed

80 VA open gap - 65 closed

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TYPE SGR-12RELAY ____________________________________________________ __

6

lkl1�G�1 :-rrf[JI f-- _§_ 'I�� , 16

+ - ··� ! - - - �-<t_ -lv 1'---+--'t--�- . I II I ., I 3 1 ·�

-:3� I ir ,1

���� � � P"'-NEL LOCATION \ I S'.::MI-FLUSH MT&.� \ PRCJ"ECT10N MTG. -----'

''<:JTE ·.ALL l'\MENSIONS IN INLi·lt::'S.

� 'DIA.. 4-HOI....ES FOR +,1.90-32. MIG-. SCREWS

PANEL CUTOUT � DR\LUNG­rOR SEMI-FLIJ51-\ MTG.

�--------- 5� --�

't- !_�� ct, 7HOLE

I 4 - ·j -�--- i- . ��'2.- \ �c.--t

57-D-7900

Fig. 5. Outline and Drilling Plan for the Type SGR-12 Relay in the Type F T11 Case.

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WESTINGHOUSE ELECTRIC CORPORATION RELAY DEPARTMENT NEWARK, N. J.

Printed in U.S. A. www . El

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