Indoor AC Medium Voltage Metal-clad Switchgear Instruction Manual24kV, ...3150A, ...40kA

AMS

Manufacturer:

Schneider Electric Huadian Switchgear(Xiamen)Co.,Ltd

No.22,Huo Ju Bei Lu,Xiamen

361006,China

Tel: +86 (0)592-5775316

Fax: +86 (0)592-5775319

01 02

AMSContents Pages

GeneralSummary StandardsService conditionNormal service conditionSpecial service condition

Product Dimensions

Technical DataAMS Switchgear Technical dataESW Earthling Switch Technical dataVEP Circuit Breaker Technical dataDerivative scheme for the standard panel (see Appendix 1)

Switchgear StructureEnclosure and OthersWithdrawable TrucksStructure of Withdrawable truckCircuit breaker truckCompartments inside the SwitchgearWithdrawable truck compartment BBusbar compartment ACable compartment CLow voltage compartment DInterlock protection against erroneous operationPressure Relief SystemInterlock between Pilot Plug and Withdrawable TruckPower Indicators Anti-dew and anti-corrosion measureEarthing device

Assembly and Commissioning Foundation stylesAssembly of the switchgear panelsInstallation of Main BusbarEarthing Device of PanelConnection of Secondary Control Wirings between Panels Basic Connection Methods of Power Cables Check after Installation

Applications and MaintenanceOperation ProceduresOperation of Witchgear Panel without Earthing Switch for Circuit BreakerOperation of switchgear panel with earthing switch for circuit breakerOperation of ordinary isolation panelNotes on interlock Special Notes and Precautions

Transportation and Storage

Supplied Documents

Notes for Ordering

Spare partsAppendix 1

11.11.21.3

1.3.11.3.2

2

33.13.23.33.4

44.14.2

4.2.14.2.2

4.34.3.14.3.24.3.34.3.4

4.44.54.64.74.84.9

5 5.15.25.35.45.5 5.65.7

66.1

6.1.16.1.26.1.3

6.26.3

7

8

9

10

0203

04-05

06-09

10-13

14-16

17-18

161617

1. General

1.1 Summary

AMS (KYN96-24) Indoor Metal-clad Switchgear (herein after called AMS) is a synthesis of 24kV

three-phase AC 50Hz single busbar distribution device and its isolation system. It is mainly used for the

small and medium power generator in power plants, distribution in industrial and mineral enterprises,

secondly transmission station and distribution station of power system as well as the large high-voltage

motor etc. fields for the control , protection and supervision purposes. It has “five protection” interlock

functions: avoid circuit-breaker being withdrew when the circuit-breaker are at the closing position, avoid

circuit breaker being erroneous closed or opened, avoid the circuit breaker being operated on the

circuits which the earthing switch are at the close position , avoid personnel going into the compartment

which are still live and avoid the earthing switch being operated when the circuits are still live. Equipped

with our VEP indoor withdrawable vacuum circuit breaker, It is a powerful distribution equipment.

1.2 Standards

This Switchgear panel complies with IEC62271-200,GB3906,DL/T404 etc. standards, the grade of protection

for switchboard is IP4X, and when the interrupter door is opened and the truck is moved away, the grade of

protection is IP2X.

1.3 Service Condition

1.3.1 Normal Service Condition

a) Ambient temperature: -15 ～+40°C

b) Maximum altitude: 1000m a.s.l.

c) Ambient humidity:

Daily average relative humidity: no more than 95% Monthly average relative humidity: no more than 90%

d) Intensity of earthquake: no more than 8 grade;

e) Environment is free from any corrosive or flammable gas, water vapour etc. pollution.

f) Away from serious dirt and frequent strong vibration. The severity level under the severe condition

should meet the requirements for Class 1.

1.3.2 Special Service Condition

When some special service conditions are not involved in GB3906 Standard and this technical specification,

the customers should have a negotiation with the manufacturer.

03 04

AMS2. Product Dimensions

Dimensions and weights see Table 1 and Figure 1

Figure 1

Dimensions

3. Technical Data

3.1 AMS Switchgear Technical data

AMS Switchgear Technical data Table 2

Item Unit ValueRated Voltage kV

Hz

kV

kV

A

kA

kA

24

50

50/651)

125

630/1250/1600/2000/2500/31502)

25/31.5/40

63/80/100≤100+CT3) (≤630A)≤100+CT3) (≤1250A)≤50+CT3) (≤2000A)≤45+CT3) (≥2500A)IP4X

IP2X

Rated Frequency

Rated power frequency withstand voltage(1min)Rated lighting impulse withstand voltage(peak)

Rated CurrentRated short-time withstand current(4s)

Rated peak withstand current(peak)

Main circuit resistance

enclosureDoor of circuit breaker compartment opened

Degrees of protection

ESW Earthling Switch Technical data Table 3

3.2 ESW Earthling Switch Technical data

Item Unit Value

Rated Voltage

Rated power frequency withstand voltage(1min)

Rated lighting impulse withstand voltage(peak)

Rated short-time withstand current(4s)

Rated short-circuit breaking current(peak)

Rated peak withstand current(peak)

Phase Space/Distance

24

50/65*

125

31.5

80

80

210/275

kV

kV

kV

A

kA

kA

mm

Dimensions and Weights Table 1

Height B (mm)

800

1000

Cable Incoming/Outgoing

Branch busbar with rated current 1250A and below Short-time withstand current 31.5kA and belowBrach busbar rated current 1600A and above

1680Overhead Incoming/Outgoing 2000

Width A (mm)

Depth C (mm)

Weight( Approximation) kg 800~1200

2250

Notes: 1) The value of 50kV is in accordance with Standard IEC62271-200,2003. 2) At 31500A rated current, the switchgear panel should be forced ventilation. 3) The short time withstand current and rated peak withstand current of the current transformer is related to its ratio. Confirmation is needed when ordering.

Notes: The value of 50kV is in accordance with Standard IEC62271-200,2003.

05 06

AMS

3.4 Derivative scheme for the standard panel (see Appendix I)

VEP Circuit Breaker Technical data Table 4

3.3 VEP Circuit Breaker Technical data

Item Unit ValueRated Voltage

Rated insulation degree

Rated short-time power frequency withstand voltage(1min)Rated lighting impulse withstand voltage(peak)

Rated Frequency

Rated current

Rated short-circuit breaking current

Rated short-time withstand current

Rated peak withstand current

Rated short-circuit making current(peak)

Rated out-of-phase earthing breaking currentRated breaking current of single / back-to-back capacitor bank

Rated short-circuit durationRated breaking times at the short-circuit breaking current

Operation cycle

Rated operation sequenceAuto-reclose

Mechanical life

kV

Hz

A

A

s

times

times

kA

kA

24

50/65*

125

50

63012501600200025003150**

12501600200025003150**

25

25

63

63

21.8

31.5

31.5

80

80

27.4

12501600200025003150**

40

40

100

100

34.8

630/400

3/4*

274***

O-0.3s-CO-180s-CO

20000

4. Switchgear Structure

The Switchgear is configured in accordance with GB3906 and IEC62271-200 requirements for metal-clad switchgear. It consists of the Switchgear and intermediate withdrawable part (i.e. Circuit Breaker truck) two units. See Figure 2. The panel is divided into four independent compartments, and the Switchgears are classfied into the overhead incoming/outgoing feeder Switchgear, cable feeder Switchgear or other functions Switchgear, and they are arranged and collocated to form variant distribution devices. This type of Switchgear can be installated, tested and maintained in front, so when the single busbar isolation system is used, the Switchgears can be back to back or face to face fixed, except for the arrangement in two rows, the Switchgears can also be set up against the wall to improve the Switchgear safety and flexibility, as well save the space.

4.1 Enclosure and Others

The enclosure and partition of the Switchgears are made up of high quality galvanized steel sheet with CNC machine by means of multiple edge folding technology, so the Switchgear is of high precision, strong anti-corrosion and antioxidant function; as well comparing with other switchgear Switchgears, it is featured of lighter weight, higher mechanical strength and better appearance. The panels use the assembly structure, and are fixed together by means of the riveting nuts and bolts with high strength . This Switchgear technology is of short production period, universal components, saving space and easy production management. The door and side boards of the Switchgears are made of cold-rolling steel sheet by means of purification, anticorrosion treatment and plastic painting processes to make the panel surface featured of anti-shock and anti-corrosion as well as good appearance.

4.2 Withdrawable Trucks

4.2.1 Structure of Withdrawable truck

The frame of withdrawable truck is also made up of steel sheet by means of CNC technology. The insulation matching and mechanical lock between the withdrawable trucks and Switchgears are of safety, reliability and flexibility. According to the different application purposes, the withdrawable trucks are divided into the withdrawable circuit-breaker truck, voltage transformer truck, metering truck, isolation truck etc., and the trucks of same configuration are absolutely interchangeable. The withdrawable truck inside the Switchgear is preset for the dis-connecting position/testing position and service position, and each position is respectively fitted with the locating device for the reliable interlock. The operation for trucks must follow the procedures for interlock against erroneous operation, and various withdrawable trucks are easily and flexibly cranking in and out, suitable for various personnel operations. When the withdrawable truck needs to be moved away from the Switchgear, a special service truck is used for easy moving it away for various inspection and maintenance; due to the intermediate design of the withdrawable truck, the truck are featured of small dimensions, convenient inspection and maintenance.

4.2.2 Circuit breaker truck

The circuit breaker truck is equipped with the vacuum circuit breaker and other auxiliary parts. When the withdrawable truck was pushed into the circuit breaker compartment by means of a service truck, the part is reliably locked to the disconnected / test position, simultaneously the location indicator shows its location. Only when the withdrawable truck is safely locked, the cranking mechanism can be rotated to the service postion, when reaching the service position, the crank handle can not advance any more, and the correspoinding indicator shows its location. The mechanical interlock could reliably endure the withdrawable truck only stay at the service position or test position when the circuit breaker performs the closing or opening operation; and only the circuit breaker is at opening position, the withdrawable truck is movable.

4.3 Compartments inside the Switchgear

The main components of the Switchgear have their independent compartments, i.e. circuit breaker compartment B, busbar compartment A, cable compartment C, meter compartment D. the degree of protection for each compartment is IP2X; except for the meter compartment, other three high voltage compartments are fitted with the pressure relief channels. Thanks to the intermediate structure, the cable compartment is greatly enlarged, so this version of panel is able to connect multiple cables.

Notes: *The value of 50kV and 3s should be in accordance with Standard IEC62271-100,2001. ** At 3150A rated current, the circuit breaker should be forced ventilation. *** In accordance with Standard GB1984-2003. E2 Grade. All technical data is strictly derived from the type test, not the theoretical value.

07 08

AMS4.3.1 Withdrawable truck compartment B

Both sides of compartment is fitted with travel rails for the withdrawable truck to move among the isolation position/test position and service position. The partition (the shutters) of the isolation bushing is installed at the back wall of the circuit breaker compartment. During the withdrawable circuit breaker moves to the service position from the disconnected position/ test position , the shutters in front of the top and bottom isolation bushings are automatically opened by means of being actuated by the withdrawable circuit breaker; when moving to the reverse direction, the shutters are automatically closed, till the withdrawable circuit breaker goes back to somewhere the isolating bushing are completely covered and form the efficient isolation, at the same time, due to the separate top and bottom shutters, the shutter which is live can be individually locked for test and maintenance to protect the operator against the live parts. When the circuit breaker compartment door is closed, the withdrawable truck can still perform various normal operations. Through an inspection window on the circuit breaker compartment door, the position of the withdrawable circuit breaker inside the compartment and the indicators for ON/OFF and CHARGED/DISCHARGED can be observed.

4.3.2 Busbar compartment A

The main busbar is jointly connected in a single panel or laid in series from panel to panel, see Figure 6. It is held by means of the branch conductor and isolating bushing. The connection of the main busbar and branch conductors has a rectangular or D-shaped cross-section. For the large current rating, double busbars are used; the branch busbar is connected to the isolating bushing and main busbar by the means of the bolt connection and no any support. For some special needs, the busbar is covered by means of shrink-on bushings and bolt insulating sleeves as well as the end caps; the main busbars between panels are fixed by means of bushings so that moderate air is remained between the connecting busbars for buffer purpose. When arc-fault occurs inside the panel, air buffer protects the panel against being penetrated and melt, meanwhile, the bushings could efficiently limit the accident only within the compartment, not spread to other panel.

4.3.3 Cable compartment C

This type of panel uses the intermediate structure to make the cable compartment have enough large space, so the current transformer, voltage transformer, arrester and other components can be installed at the rear of the cable compartment, the earthing switch is fixed on the mounting plate of the isolating bushing; when removing the withdrawable parts and horizontal partition, there is enough space for the operator entering the panel for installation and maintenance; the cable is connected to the conductors in the cable compartment, up to 1-3 single-core cables can be connected, if necessary, the removable non-metal floor cover with split or insulated metal floor cover is installed on the bottom of the panel to guarantee the flexible operation.

4.3.4 Low voltage compartment D

The low voltage compartment contains the protection relay components, meters, power indicators and special secondary devices. If the secondary devices are not intended for door installation, they can be mounted on DIN RAILS for any flexible subsequent changes to the wirings. The control wirings are laid in a duct where enough space is preset; they are covered to make the secondary wirings isolated from the high voltage compartment. The left wiring duct is preset for the incoming or outgoing wirings, and the wirings inside the panel are on the right side of the panel.

4.4 Interlock protection against erroneous operation

The panel contains the reliable interlock mechanism to meet the “five protection” requirements and efficiently protect both personnel and equipment. The functions of interlock are as follows:

a) Only when the withdrawable circuit breaker is at the test/service position, the mechanical interlock of the charging protection half shaft can be released, and the circuit breaker can be switched on. After switching on, the withdrawable truck can not be moved to avoid operating the circuit breaker which is live.

b) When the earthing switch is at the opening position, the withdrawable circuit breaker can be moved from the test/disconnected position to the service position. Only when the withdrawable part is at the test/disconnected position, the earthing switch can be switched on ( the earthing switch can be fitted with the voltage indicator), thus to protect the earthing switch from being erroneously closed when the part is live and circuit breaker being closed when the earthing switch is on.

c) When the earthing switch is at the opening position, the cable compartment door can not be opened to avoid entering the live compartment.

d) When the withdrawable circuit breaker is surely at the test/service position and no control voltage is on, the switch can only be manually opened, can not be closed.

e) When the withdrawable circuit breaker is at the service position, the secondary plug is locked.

f ) All panels can be fitted with the electrical interlock system.

This version of panel can also be fitted with the magnetic interlock on the earthing switch mechanism to improve its reliability. The customers could choose this function according to their requirements.

4.5 Pressure Relief System

The withdrawable circuit breaker compartment, busbar compartment and cable compartment are all fitted with the pressure relief channel on their tops, when the fault arc happens inside the circuit breaker or busbars, the air pressure inside the panel rises up, the special seal washer on the door obturates the front panel, then the relief metal cover on the top of the panel is automatically opened to relieve air pressure as to guarantee the personnel and equipment safety.

4.6 Interlock between Pilot Plug and Withdrawable Truck

The secondary wiring connection between the panel and the withdrawable circuit breaker is realized with a pilot plug, the movable contact is connected to the withdrawable circuit breaker with a nylon extension bushing, and the socket is fitted on the right top of the withdrawable truck compartment inside the panel. When the withdrawable circuit breaker is at the test/disconnected position, the pilot plug can be plugged in or unplugged; when the withdrawable circuit breaker is at the service position, with the mechanical interlock, the pilot plug is locked and can not be removed. Because the switching mechanism is locked by the electromagnet, the withdrawable circuit breaker can not be switched on till the pilot plug is plugged in.

4.7 Power Indicators

The panel can be fitted with the optional parts which could test the primary circuit works or not, i.e. the power indicator. This device contains the high voltage sensors and portable indicators two units, the sensors are fixed beside the busbar or incoming wirings, and the socket of the indicators is fixed in the meter compartment. This device not only indicates the load status of the high voltage circuit, but also matches with the lock magnet to perform the protection measures like forcibly locking the switch handle, preventing the earthing switch with load being operated and erroneous entering the compartment which is live, etc. as to improve the fault-protection function of the matching products.

4.8 Anti-dew and anti-corrosion measure

In order to avoid the dew damage due to the environment with large humidity change. The heater is fixed respectively in the circuit breaker compartment and cable compartment so that the device can be used in above-mentioned environments and to protect the equipments from corrosion.

4.9 Earthing device

The earthing bar with 8x30mm dimension is independently fixed in the cable compartment; it goes through the series panels and is well connected to all panels. This earthing bar is for the applications that the components are directly earthed. Meanwhile, being made up of aluminum-Zinc steel sheet, the whole panel is in good earthing condition to guarantee the personnel and equipment safety.

09 10

AMSFigure 2

Sketch of Switchgear

1. Pressure relief flap2. Enclosure3. Branch conductor4. Busbar Bushing5. Busbar

6. Isolating contact 7. Isolating bushing 8. Current transformer 9. Earthing switch10. Main earthing bar

11. Partition – removable12. Shutter13. Control wiring plug14. Circuit Breaker Truck15. Horizontal partition, removable

16. Heater17. Floor cover

A. Busbar compartment B. Circuit-breaker compartment C. Cable compartment D. Low voltage compartment

5. Assembly and Commissioning

5.1 Foundation styles

■ The construction for the foundation of the switchgear panel should comply with the specific require ments (of the Power Construction and Acceptance Technical Specification).

■ The installation foundation for the panel is constructed by means of secondary concrete injection. The primary construction is to install the supporting parts, i.e. angle steel, rectangular steel or channel steel parts, and the secondary construction is to inject the supplementary concrete layer on the ground with 60mm thickness, when injecting with concrete, the height of concrete should be 1-3mm lower than the supporting parts.

■ In the construction design, the height of base iron and moderate allowances are considered when scaling the foundation, and steel plate is laid in every 1-1.5m straight distance along the foundation frame. See Figure 3.

■ Quality must be guaranteed for the foundation installation. The technical standard for foundation is 1m tolerance per square meter.

■ The foundation frame is the weldment made up of channel steel and angle steel; the basic dimen sions for the frame and cable channel arrangement see Figure 4 and 5. No strict requirements for the height of channel steel are specified, “5” and “8” channel steels are options. The extension length of the channel steel of the foundation frame should be equal to the main frame of the panel, i.e. 1620mm. The total length of the frame is determined by the panel arrangement and the set number of the panels in each row. Figure 4 is the dimensions for the foundation frames with two kinds of panel widths.

5.2 Assembly of the switchgear panels

■ For a single row of panel arrangement, the suitable passway in front of the panels is 2.5m; for the two rows of panels, the distance is approx. 3m.

■ According to the engineering requirements and drawing notes, the panels should be fixed at the specific positions. If it is a long row of panels (containing above 10 sets), the installation of panels should be started from the middle.

■ During transportation, the special transportation tools are used, e.g. lifter or forklift, etc. but never to use the roller crowbar, and it is forbidden to put the withdrawable circuit breaker inside the panel when transportation. The withdrawable circuit breaker (or other withdrawable trucks) can only be pushed into the panel after the panel is completely built up.

The installation procedures are as follows:

1) Loose the bolt of the lid in the busbar compartment, remove the lid.

2) Loose the fixed bolts in front of the busbar compartment, and remove the removable partition.

3) Loose the fixed bolts of the removable flat partition at the bottom of the withdrawable circuit breaker compartment, and remove the flat partition.

4) Loose and remove the lid of the cable compartment.

5) Remove the cover of the control wiring duct at the left side of the switchgear. At the same time, the cover on the right of the control duct is also removed.

6) Remove the hoisting plate and fasteners.

7) Above the foundation, the panels are installed one by one. In order to guarantee the correct instal lation, the evenness in both vertical and horizontal direction is not more than 2mm.

8) When the switchgear panel is completely assembled, it is jointed to the foundation frame with a foundation bolt of M12 and strength degree no less than 8.8, or firmly welded to the foundation frame by means of the electric welding technology.

11 12

AMSFigure 3

Figure 4

5.3 Installation of Main Busbar

The main busbars inside the panel are of rectangular or “D”-shaped cross-sections and isolated. When the current ratings of the panel are different, the used number and specifications of the main busbars are also different. During the installation for busbars, the following steps must be taken:

■ Clean the busbar sections with a clear, dry and soft cloth, check the insulating bushing for damage, and coat the connecting sections with conductive grease or neutral Vaseline.

■ Install the busbars panel by panel. The main busbar is connected to the corresponding branch busbar, inserting a suitable spacer and tightening the bolts.

5.4 Earthing Device of Panel

■ Use the preset connecting plate to connect the earthing busbars of all panels.

■ Connect all wirings inside the panels which require for the earthing connection.

■ Connect the foundation frame and earthing bar. If the panel arrangement contains above 10 sets, two earthing bars are required.

■ Connect the earthing wire of the earth switch and the earthing main busbar of the panel.

5.5 Connection of Secondary Control Wirings between Panels

The secondary control wirings between panels are tied together and put inside each panel; both ends of the wiring are marked with the wire code. A small busbar hole on both sides of the low voltage compartment is preset for these secondary wirings being connected panel by panel.

5.6 Basic Connection Methods of Power Cables

The connection between the power cables must comply with the local requirements for the cable construction.

The following procedures are only for reference:

1) Introduce in the power cable, bare it at the preset length.

2) According to the diameter of the cable core, the plastic seal washer on the bottom of the panel is drilled with a sized hole, then the cable goes through the cable hole on the bottom and plastic seal ring, enters the cable connection compartment, and it is fixed with the cable clamp on the bottom.

3) Fix the cable terminals according to the manufacturer’s Installation Instruction.

4) Loose the bolt and nut of the cable connection bar, then fix the cable ends on the main busbar.

5) Finally, the earth bar of the cable is connected to the earth potential of the panel.

5.7 Check after Installation

After the assembly of the switchgear panel is completed, clean off the dust and sundries; then check for no loose fixing bolts and connections; rotate the circuit breaker in and out of the panel and perform the operning and closing operations to observe for any abnormal phenomena; adjust the meter pointer to zero, check the secondary wiring connection according to the circuit diagram; adjust the relays and check the interlocks.

Example of profiles for Switchgear on foundation frame on concrete floor

Typical working diagram of the foundation frame for 1000,800mm wide units

Top surface of foundation frame is 3~5mm above floor.

Cover of control cable conduit=5mm corrugated steel plate

Control cable channel 250*250

Power cable channel 800*1000

Foundation frame

800 350 650

0.0mm

0.25mm

3030 1620

1680

22501000

205 280

380

13

50 50

No.5 Channel steel

908001000

90

37

1680

1150

130

115 115 115 115770 570

9090

13 14

AMSFigure 5

Figure 6

Typical installation diagram for cable channel

Rectangle type main busbar diagram D type main busbar diagram

6. Applications and Maintenance

During the operation of the panel, except for the relative procedures, the operator should also be careful for the following:

6.1 Operation Procedures

Although the design for the switchgear panel can guarantee all operation procedures in correct interlock, the operators should still strictly carry out the requirements of the operation procedures and this technical document regarding the entrance and withdrawal of all panel sections, they should not randomly operate the switchgear panel, and what is more important, when any operation is blocked, do not operate it without any analysis, otherwise, the equipment may be damaged, even an accident be caused.

6.1.1 Operation of Witchgear Panel without Earthing Switch for Circuit Breaker

a) Installation of withdrawable circuit breaker

Before the withdrawable circuit breaker is cranked into the panel, carefully check the complete circuit breaker for any missing components or leaving some tools or other sundries inside the mechanism box or panel. If no any problem, put the withdrawable part onto the service truck and lock it, then lift the withdrawable part to the suitable position in front of the panel, slot the position lock of the service truck into the partition of the panel, after locking up the service truck and panel, open the locking hook of the withdrawable circuit breaker, gradually push the withdrawable part into the panel and lock it. When the lock for the withdrawable part and the panel is confirmed, release the lock of the service truck and panel, and move the service truck away.

b) Operation of withdrawable circuit breaker inside the panel

When the withdrawable part is conveyed to the panel, it is disconnected inside the panel. To put the withdrawable part into operation, firstly preset the withdrawable part at the test position, power on the auxiliary circuit. If the test indicator on the metering control compartment lights on, the withdrawable part can be tested in a disconnected main circuit; if the subsequent operation is needed, firstly make sure all doors closed, lock them with the keys and confirm the circuit breaker at OFF status (see"d)"). At this time, insert the cranking handle into the hole of the circuit breaker compartment, rotate it in a clockwise direction till the rotation is obviously blocked and a clear click for switching is heard; when the working indicator on the metering compartment lights on, remove the cranking handle. At this moment, the main circuit is working and the circuit breaker can be switched on or off by means of controlling the circuit.

If the truck will be withdrawn from the working position, firstly make sure that the circuit breaker is already disconnected (see"d)"Item), inserting the cranking handle and rotating it in a counterclockwise direction till the rotation is blocked and a clear click for switching is heard, then the withdrawable part is back to the test position. At this time, the main circuit is completely disconnected, and the shutters are closed.

c) Extraction of the withdrawable part from the panel

If the withdrawable part needs to be taken out of the panel, firstly make sure that the withdrawable part is already at the test position, then remove the secondary circuit plug and lock the withdrawable part to the truck frame, next, move the service truck to the front of the panel (the same procedures as b)), unlock the withdrawable part and pull it out. When the withdrawable part is completely conveyed onto the service truck and locked, release the lock with the panel and pull the service truck backwards to a certain distance, slightly let it down. If the withdrawable part will be conveyed for a longer distance, special attentions should be paid to moving the service truck to avoid any accident during the transportation.

Power cable channel

Control cable channel

800(1000)70

210 30

30

100

80

800

1620

565

600

205

1680

550(750) 250

1

2

3

1

2

3

1. Main busbar2. Bolts and Nuts3. Branch conductor

1. Main busbar2. Bolts and Nuts3. Branch conductor

Foundation frame

15 16

AMSd) Confirmation of circuit breaker switch-on and switch-off inside the panel

The switch-on or switch-off status of the circuit breaker is indicated with the indicators of the withdrawable circuit breaker compartment panel and the meter compartment panel.

If the GREEN switch-off indicator is observed through the observation window on the panel, the circuit breaker is determined as the switch-off status, at this time, when the secondary circuit is plugged in, the Switch-OFF indicator on the metering panel lights on.

If the RED switch-on indicator is observed through the observation window on the panel, the circuit breaker is determined as the switch-on status, at this time, when the secondary circuit is plugged in, the Switch-ON indicator on the metering panel lights on.

6.1.2 Operation of switchgear panel with earthing switch for circuit breaker

The procedures for the withdrawable circuit breaker being pushed in and taken out of the panel are same as those when without the earthing switch for circuit breaker. But the following items should be taken care of only during the operation inside the panel and earthing switch operation:

a) Operation of the withdrawable part inside the panel

When pushing the withdrawable part to the service position, except for complying with the requirements put forward in 6.1.1, make sure the earthing switch is at the switch-off status before carrying out the next operation

b) Operation of earthing Switch-ON and Switch-OFF

For earthing switching on, firstly make sure the withdrawable part has already been moved back to the test/disconnected position, remove the cranking handle, then press down the interlock plate near the hole of the earthing switch, insert the operating lever of the earthing switch and rotate it with 180° in a clockwise direction to switch on the earthing switch.

6.1.3 Operation of ordinary isolation panel

The isolation truck has no functions of making and breaking current, so it is restricted to operate the withdrawable part under load. During the operation of the isolation truck inside the panel, the related circuit breaker must be switched off (see 6.1.1"d)"), then its auxiliary contact is switched to connect with the related lock electromagnet of the isolation truck, only at this time, the isolation truck can be operated. The operation procedures are same as those for the withdrawable circuit breaker.

6.2 Notes on interlock

■ The main interlock function of this switchgear panel is the mechanical interlock, assisted with the supplementary electrical interlock function to realize the “five-protection” interlock function of the switchgear panel. However, the operator should not neglect the operation precedures. Only when the procedures are combined with the technical measures, the interlock mechanism can be efficiently functioned to avoid any accident.

■ The interlock functions of the switchgear panel are mostly realized synchronously during the normal operations, no additional procedures are needed. When the operation is blocked (e.g. the resistance for operation is becoming more and more), firstly check for possibility of any faulty operation, and any imposed operation is restricted to avoid the equipment damage and even misoperation accident.

■ Some interlocks can be urgently unlocked for some special needs (e.g. the interlock of the lower panel door and earthing switch). The use of the urgent unlocking must be cautions, should not be frequent. When in use, necessary protection measures must be taken, and the interlock should be immediately resumed as soon as the urgency is solved.

6.3 Special Notes and Precautions

Besides the related procedures and requirements for the switchgear maintenance, the following notes are recommended:

■ According to the requirements of the Instruction Manual for the vacuum circuit breaker, check the circuit breaker condition and make necessary commissioning.

■ Check the withdrawable propelling mechanism and its interlock to meet the relative requirements in the instruction manual.

■ Check the main circuit contacts, clear off the old grease on the contacts and inspect on them for any damage, check for the spring force change and abnormal oxidized coating phenomena caused due to the overhigh temperature. If any above-mentioned, treatment should be taken immediately.

■ Check the auxiliary circuit contacts for any abnormal phenomena, do necessary maintenance.

■ Check the earthing circuit, like earthing contacts, main earthing wire and transition earthing wire, etc. to guarantee the continuous conduction.

■ Check all fasteners, if any loose, tighten them immediately.

7. Transportation and Storage

Cares are taken for the following items during transportation and storage:

a) Do not dump, reverse and shock, far away from fire force.

b) Protect against rain and moisture.

c) Do not randomly remove the electrical products and components.

d) Never stack the panels.

8. Supplied Documents

a) Product Certification of Quality

b) Packing list

c) Factory Test Report

d) Instruction Manual

e) Equipment List

f) Secondary Wiring Diagram

g) Catalogue of drawings and list of equipments;

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AMS9. Notes for ordering

When placing an order, the following information should be supplied:

a) Schematic drawing number of the single line diagram, applications and system diagram, rated voltage, rated current, layout of distribution room and configuration of switchgear panel, etc.;

b) Requirements for switchgear control, measurement and protection functions and other requirements and secondary diagram for lock and automatic mechanism;

c) Type, specifications and quantity of the electrical parts and components in the switchgear;

d) Collection of electrical equipments;

e) When the busbar duct (busbar duct between two rows of panels and busbar duct between wall and panel) is needed, the rated load capacity and span, height, etc. data are required;

f ) The special environmental conditions for the switchgear panel should be put forward when placing an order;

g) If other appendixes and documents not involved herein are needed, clearly state the category and quantity.

10. Spare parts

a) Crank handle for circuit breaker;

b) Charging lever for circuit breaker;

c) Operating level for Earthing switch;

d) Service truck for circuit breaker (the customer places an order with the manufacturer);

Appendix 1

Derivative scheme for the standard panel

Crank handle for circuit breaker Charging lever for circuit breaker

Operating lever for earthing switch Service truck for circuit breaker

Incoming/Outgoing-24kV (the mode of double outgoing)

Bus-riser panel-24kV (Left) Bus-tie Panel-24kV