METAL- CLAD SWITCHGEAR TYPE SRUK 12, SRK 12

12 kV..., 3150 A..., 40 kA

Instruction manual

ABB EJF s.r.o.

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Table of contents :

Safety as a priority - always and everywhere! page

1. Introduction 42. Short description of the switchgear 4 2.1 Voltage instrument transformers 4 2.2 Current instrument transformers 5 3. Standards and regulations 5 4. Operating conditions 5 4.1 Specific operating conditions 5 5. Main technical data 6 6. Assembly instructions 6 6.1 Transport and storage 6 6.2 Preparatory works 7 6.2.1 Foundations 7 6.2.2 Tools and accessories 8 6.3 Switchgear assembly 8 6.3.1 Fixing the cubicles to the foundations 8 6.3.2 Busbar assembly 9 6.3.3 Earthing of the cubicles 10 6.4 Electric connection 10 6.4.1 Installation of medium voltage power cables 10 6.4.2 Installation of control and indication cables 10 7. Switchgear operation 11 7.1 Commissioning 11 7.1.1 Preparatory works 11 7.1.2 Switchgear start-up 12 7.2 Switchgear control 12 7.2.1 Withdrawable circuit-breakers 12 7.2.2 Other withdrawable parts 13 7.2.3 Withdrawable modules with disconnecting jumper 13 7.2.4 Withdrawable modules with voltage measuring transformers 13 7.2.5 arthing switch at the switchgear outlet 14 7.2.6 Busbar short-circuiting 15 7.3 Final works 16 7.4 Commissioning 16 8. Inspection, maintenance and repairs after switchgear commissioning 16 8.1 Inspections 16 8.2 Maintenance works 16 8.3 Repairs 17 8.4 Periods of inspection, maintenance and repairs 17 9. Maintenance and repair - description of work steps 17 9.1 General 17 9.2 Preparatory works 17 9.3 Maintenance 17 9.4 Repairs 18 9.4.1 Switchgear in general 18 9.4.2 Procedures to be followed when replacing a specific part of the switchgear 18 10. Spare parts 20 11. List of lubricants and solvents 20 12. Blocking/protection against faulty handling 20 13. Other related catalogues and operation manuals issued by ABB EJF s.r.o. 21

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WARNING

Always observe the instruction manual and follow the reles

of good engineering practice!

Hazardous voltage

can cause electrical shock and burns.

Disconnect power before procceding with any work on this eguipment.

Safety first - always!

Only install switchgear and controlgear in enclosed rooms suitable for electrical equipment.

Ensure that installation, operation and maintenance are carried out by specialist electricians only.

Comply in full with the legally recognized standards (IEC/CSN), the connection conditions of the localelectrical utility and the applicable safety at work regulations.

Observe the relevant information in the instruction manual for all actions involving switchgear andswitchboards.

Danger !

Pay special attemtion to the hazard notes in the instruction manual marked with this warning symbol.

Do not exceed the loads quoted in the technical data of the specification in normal operation of theswitchgear.

Keep the instruction manual accessible to all persons concerned with installation, operation andmaintenance.

The user_s peresonnel are to act responsibly in all matters affecting safety at work and the correcthandling of the switchgear.

If you have any futher questions on this instruction manual, we will be pleased to provide the requiredinformation.

NOTICE:

We can give a guarantee with a correct operation of our equipment only in case when theinstallation of switchgear cubicles is carried out by verified erecting works with which we havecontracted a service agency. Erecting staff of these works is regularly trained in our companyand can secure that the installation, setting up and commissioning are carried out in a correctway including a qualified service and if need be repairs.In case that you will decide for other than the erecting works recommended by the manufacturerthen it is inevitable to carry out the training of erecting staff in our company on the basis of anagreement.

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1. INTRODUCTION

The switchgears of SRUK 12 and SRK 12 type represent a continuation in a type series of SRswitchgears the operation of which has successfully been proven in the practice. The above switchgearscan only be equipped with VD4 vacuum circuit-breakers.

The switchgear is designed and type tested to the international IEC 298 Publication and meets fully allthe respective operating and safety requirements. It features a high operation reliability while usingtested and verified components.

2. SHORT DESCRIPTION OF THE SWITCHGEAR

In its basic design the switchgear consists of the following design parts:

- circuit-breaker module, where circuit-breaker is located in a withdrawable frame- voltage instrument transformer module in withdrawable design, or with fixedly mounted voltage

instrument transformers- current instrument transformer module with cable connection- busbar module- LV instrument box

This design provides for an easy and flexible arrangement of various cubicles (such as the bus coupler,measuring cubicle etc.). The installation of the circuit-breaker on a withdrawable frame contributes to asignificant reduction of the installation area. The possibility of moving the circuit-breaker from testing intooperating position, and vice versa, with switchgear front doors closed, provides for additional reduction ofinstallation area and increases the safety of operating personnel. Transport of the circuit-breakerremoved from the switchgear cubicle is carried on by using a servicing truck which forms a part of theswitchgear delivery.

The switchgear has been designed as a metal-clad one with specific areas (circuit-breaker area, busbararea, measuring transformer area) separated each from the other by metallic and earthed partitions.

The switchgear design has been arranged in a way to withstand the internal fault as specified by theIEC 298 Standard, Appendix AA. This means that each of the separated areas has been provided with apressure relieve opening to vent the decomposition products generated during electric arc, by takingthem up and outside of the area occupied by the operating personnel. This design arrangement providesfor a substantial improvement of the occupational safety of the personnel. The switchgear resistanceagainst internal short-circuit was tested to the above international standard, with satisfactory results.

The SRUK/SRK switchgears can not be combined together with older SR switchgear types.

2.1 Voltage instrument transformers (Vts)

The SRUK and SRK switchgear may be equipped with voltage instrument transformers (abbreviationVT), used for the measuring of voltage on switchgear outlets (inlets) and on the busbars.

When measuring voltages at the outlet (inlet) of the switchgear system the measuring transformers arelocated below the frame with circuit-breaker (see Fig. 4, item1036 and Fig. 5, item 1031). For this casethe following combination of VTs can be used:

• 1 pc to 3 pcs of single-pole insulated VTs of TJC 4 type, without fuses, with fixed mounting (see Fig. 4)• 1 pc or 2 pcs of double-pole insulated VTs of TDC 4 type, without fuses, with fixed mounting (see Fig. 4)• 1 pc to 3 pcs of single-pole insulated VTs of TJP4.1 (TJP 4.2) type, with fuses and with fixed mounting,• 1 pc or 2 pcs of double-pole insulated VTs of TDP4 type, with fuses and with fixed mounting,• 1 pc to 3 pcs of single-pole insulated VTs of TJP 4.1 (TJP 4.2) type, with fuses, and installed on a

withdrawable frame (see Fig. 5).

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3. STANDARDS AND REGULATIONS

The switchgear complies with the following international standards and regulations:

• IEC 298 A.C.metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up toinclusing 52 kV (corresponds with EN 60298 Standard of January 1996)

• IEC 694 Common clauses for high-voltage switchgear and controlgear standards

In the standard version the switchgear is suitable for the continuous operation in normal operationconditions for indiir swichgear according to IEC 694-1980, sub-clause 2.1.1.

The following limit values, among others, apply:

- The ambient air temperature does not exceed 40°Cand its average value, measured over a period of 24h, does not exceed 35°C

- The minimum ambient air temperature is -5°C- The altitud does not exceed 1000m

The ambient air is not significantly polluted by dust, smoke, corrosive or flammable gases, vapours or salt.

4.1 Special operating conditions

According to IEC 694 the manufacturer and user may agree on special operating conditions whichdeviate from the normal operating conditions. The manufacturer must be consulted in advance abouteach special operating condition. Examples are as follows :

- At site altitudes above 1000m, the effects of the reduction in dielectric strength of the air on the insulation level are to be taken into account.

- Increased ambient temperatures must be compensated for in the design of the busbars and tee-off conductors, or the current carrying capacity will be limited. Heat dissipation in the switchgear panelcan be assisted by fitting additional ventilation facilities.

4. OPERATION CONDITIONS

The voltage measurement on busbars occurs in an additional box used for the installation of voltageinstrument transformers and located above the busbar module (see Fig. 21). This additional box canaccomodate the following combination of fixedly mounted VTs:

• 3 pcs of single-pole insulated VTs of TJP 4.1 (TJP 4.2) type, with fuses,• 2 pcs of double-pole insulated VTs of TDP4 type, with fuses.

When using the single-pole insulated voltage instrument transformers of TJP 4.1 (TJP 4.2) type twodifferent types of fuses can be used:

• JT6 fuses (manufactured by ABB EJF Brno - Czech Republic), brand marking TJP 4.1• fuses to the IEC 282-1 standard (manufactured by ABB Distribution, Norway, or other types of fuses),

brand marking TJP 4.2.

The double-pole insulated voltage instrument transformers of TDP 4 type can be equipped with JT6fuses, only.

2.2 Current instrument transformers (Cts)

The SRUK and SRK switchgears are equipped with current instrument transformers of TDU 4 type, only(see Catalogue No. 358-174-I/1995).

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Note on any special climatic operating conditions:

When switchboadrs are operated in areas with high humidity and/or major rapid temperature fluctuations,there is a risk of dew depposits which must remain an exception in normal operatig conditions forindoor swichgear. Preventive action (e.g. fitting electric heaters) must be taken in consultation with themanufacturer to avoid such condensation phenomena and the possibly resulting corrosion and otheradverse effects.

5. MAIN TECHNICAL DATA

6. ASSEMBLY INSTRUCTIONS

SWITCHGEAR DIMENSIONS DEPENDING ON PARAMETERS (see Fig. 3)

6.1. Transport and storage

On inland roads or rails the cubicles can be transported as free loaded, i.e. without crates. In such acase the cubicles have to be protected against unintentional displacement, and protected against otherenvironmental effects (rain or dust) e.g. by using canvas sheets. When supplied beyond the nationalborders the cubicles are placed in wooden cases and positioned always in vertical position as prescribedby the case marking, both during the transport and storing. The bottom part of the case is provided withshock damping layer to prevent shocks that can arise during the loading and transport. When using cranes for loading the cases can be lifted only in conformity with handling instructionspainted in form of marks on the case. Cubicles removed from cases are lifted by using hoisting hooksthat are inserted into lifting lugs.

28(38)2)

75(95)2)

2) Higher parametres after agreement with producer

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Cubicles equipped with withdrawable parts have these always plugged in with their position blocked.Spare parts, accessories, levers, assembly material etc. are packed separately. After the arrival at theinstallation place the whole consignment has to be verified as to the completeness and has to pass theacceptance procedures.

During the verification especially the following is to be checked:- completeness of the consignment, including the pre-packed loose parts- damages occurred during the transport.

Immediately after the arrival to the site the switchgear cubicles transported without package have to bestored in areas with the same conditions as those which apply for later installation of the cubicles, andmust be protected against damage and contaminants. Switchgears in cases can temporarily be stored insheds.

Cubicles of switchgear prepared for the installation are transported in the building or the switch roompreferably by means of a low-lift truck with an adequate loading capacity. If a truck such this is not atdisposal or cannot be used, it is possible to transport cubicles on an even floor by means of rollers. Butthis method must be considered to be an emergency transpport and can be used only in inevitablecases. Then it is necessary to pay a special attention to this transport and to proceed with care toprevent any damage of cubicles.

Especially it is necessary to put rollers only under side walls of cubicles (longer side), no under theshorter one, where the front door and rear covers are - see the figure. In case that rollers are put underthe cubicle shorter side a serious damage of mechanical parts (guard rails, blocking devices, dooropening) can occur.

6.2 Preparatory works

6.2.1 Foundations

The floor surface has to be prepared accordingly, with foundations for the installation of switchgearcubicles. It is recommended to use a foundation frame that consists of two rails, to which the cubicles arefastened (see Fig. 1). The dimensions are shown in the floor ground plan. The flatness of the foundationshas to comply with permitted tolerance range values.Foundations on all sides of the floor have to be levelled horizontally and, in case of necessity, shimblocks under the cubicles are used in order to achieve the required levelling. The floor covering has toprovide for an easy cleaning, the flooring is to prevent slipping and must be pressure and abrasionresistant. After the installation of the switchgear, and where required, the areas in front of the cubiclesare to be covered with an insulation carpet of thickness up to 8 mm. After the installation of cables thesealing of cable bushings is to be carried out by the assembly personnel who are trained for this work.Any other specific requirements on the cable inlet into the cubicle are to be agreed with the manufacturerin advance.

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LIST OF TOOLS AND AIDS

6.2.2 Tools and accessories

Prior the final installation of cubicles the assembly personnel have to be provided with access to thefollowing items:- assembly jigs, tools and materials conformably to the list of tools and aids,- cleaning agents and accessories to a specification list,- technical documents, such as the:

layout drawings of the switchgearsingle pole drawings and parts lists,wiring diagrams, dimension diagrams,all necessary assembly and operation instructions

6.3 Switchgear assembly

6.3.1 Fixing the cubicles to the foundations

- Place down the cubicles onto the foundations.- Unscrew the lock screws and open the front door.

Tools used for this work: door key- Pull out all the withdrawable parts from the cubicles (circuit breakers, disconnecting jumpers, measuring

units) and store them at a place where these shall be protected against damage. Use the servicingtruck (position 1010, Fig. 11 and 12) supplied together with the switchgear. Follow the instructions ofchapter 7.2.1.

- Position the cubicles on the floor foundations.- Align the cubicles and level them horizontally by using water level and the guide rails as a reference level.- By using hexagonal screws (M12x30) join the adjacent cubicles each to the other.

Material used for this work: screws to a specification list

- Push in all the withdrawable parts into the cubicle.- After positioning the cubicles secure each of the cubicles by using spot welds to the guide rails (from

the front and also from the rear, if needed).

Note: Another methods of assembly can also be used, providing these shall be agreed with the manufacturer in advance.

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6.3.2 Busbar assembly (Fig. 4, 6, 7, 8, 9)

In all the cubicles you have to provide access and open the busbar area. Remove the rear covers of thebusbar area (Fig. 4, item 523), the front cover of busbar area (521), and the partition wall (524) when acorridor passes behind the rear side of the cubicle. All the covers are secured with M6 screws.

In case of having the cubicles installed next to the wall, remove the upper and front cover of the busbararea (Fig. 4, item 521, 526). However, the assembly work for this cubicle arrangement is more difficult thanwith a corridor from passing behind the cubicles. Therefore it is recommended to install cubicles withoutrear access to the cubicles only when there is no other possibility to make the arrangement of switchgear.Tools required for the mounting and dismounting of covers: open end wrench 10 mm.

Assembly procedure used for the installation of busbars into the cubicles, with rated currents of up to 1250A (see Fig.6,7,8,9):

- Insert the busbars (570) through the inlet bushings into the adjacent cubicles. The bushings now areloosely clamped to the partition wall. Turn round the busbars in a way that the larger of the two openingsis turned to the front side of the cubicle.

- Mount the busbars to the busbar branches in the following way:Slide on the clamp (540) onto the busbar branch (509) - see the Fig. 6, 7 and 8 - and slide on the busbar (507) onto each of the branch end parts. Through the busbar opening insert the plate (541), introducethree pieces of disk springs (542) onto each of the sides of the clamp and tighten slightly the nut (543).

- Make the same connection of busbars with the busbar branches in the adjacent cubicle. Proceed in thesame way as described above.

- Install all the remaining busbars in the described way, including the terminating busbar parts (535) in theextreme cubicles of the swichboard system and install insulatingend and cover (537).

- Check and make sure that busbars and either of the terminating parts (535) fit into the recess which serves for the support of the busbars, and that busbars are aligned over the whole length of the system(with a distance of approx. 10 mm between the individual busbar pieces).

- After finishing the alignment retighten all the nuts.Tool needed for this work:Torque wrench 16 mm, with extension (“Favorit” type)Torque to be applied: 30 Nm

- After the installation of busbars incl. the terminating busbar parts fit on the two-parts insulating covers (536) (if required by the purchase order).

Switchgear cubicles for rated current of 2000 A and above are fitted with busbars and assembled in aslightly different way, as described hereunder (see Fig. 8a):

- Insert the busbars (723) into the inlet bushings mounted in the partition insulation walls of the twoadjacent cubicles.Turn round the busbars in a way that the larger of the two openings is facing the front side of the cubicle.

- Connect the busbars to the branches in the following way:Introduce the plate (722) by half its length into the busbar. Insert a M20 hexagonal socket head screw(720), with three pieces of disk springs (721) into the opening and secure the position of the busbar intothe V-shaped bed piece of the branch. Retighten slightly the screws (720).

- Connect together the busbars to the busbar branches in the adjacent cubicle and fix them in the sameway as described above.

- Install all the remaining busbars in the described way, including the terminating busbar parts (535) in theextreme cubicles of the switchgear system and install the insulatingend cover (537- see Fig.7).

- Check and verify the correct positioning of the busbars and both terminating parts in the supportingrecess, and the alignment of the busbars along the whole busbar length (with a distance of approx. 10mm between the individual busbar pieces).

- After having verified the alignment retighten all the M20 hexagonal socket head screws (720).

Tools needed for this work:Torque wrench with extension 17mm (for hexagonal socket head screws)Torque: 110 Nm

- After having installed all the busbars, including the terminating busbar parts at both extremes of the system, fit on the two-parts insulating covers (536 - see Fig. 6( 7( if required by the purchase order).

Notes:

1. The interconnection between the busbars is to be carried out in a proper way which would provide fora stable „quality“ of the connection (contact resistance) during the switchgear operating period. Throughtesting and long-term monitoring it was evidenced that this type of connection for copper busbars doesnot require any maintenance during the whole service life of the switchgear system. However, whenusing aluminium busbars, it is essential to check the tightening of screw connections by using a definedtorque after every 5 years of operation.One of the pre-requisitions for this type of connection, however, is the correct assembly of the busbars.Therefore it is essential to follow the assembly procedures as described above and as shown in Fig. 6; 7; 8; 9. Especially it is necessary to tighten all the screw connections with a defined torque.

2. After each disassembly of the system do use new clamps (540), the disk springs (542) and the nuts(543) because of damaging these assembly components during the disassembly.

3 Earthing of the cubicles (Fig. 4, 14, 15, 16, 17).

- The earthing busbars (812, Fig. 4) are installed in the bottom rear part of the cubicles in the circuit-breaker area.

- Earthing busbar pertaining to a specific cubicle, through an opening in the side cubicle wall, is connectedto the earthing busbar of the adjacent cubicle. In such a way the cubicles can be interconnected andlinked as a whole to the main earthing system. Screws for this connection you can find in the cubicles.

- The interconnection of the withdrawable truck with the cubicle earthing busbar occurs automatically bymeans of blade earthing contact mounted on the truck (1004) and the earthing pin (812) which is linked with the earthing busbar of the cubicle (812).

- Connection of the whole switchgear system to the main earthing occurs by means of earthing clampinstalled in the end cubicle (522) of the system - see Fig. 15

6.4 Electric connection

1 Installation of MV Power cables (Fig. 4; 5)

Switchgears having a corridor behind the cubicles: dismantle the rear cover of the cable area (525) and connect the cables from the rear.

Switchgears positioned next to the wall: pull out the truck with voltage measuring transformers (1031) or unscrew the fixly mounted voltage measuring transformers (1036). Also it is of advantage to remove the partition wall between the circuit-breaker area and that of the voltage measurement transformers. It is, however, necessary to note that this kind of assembly is more difficult and, therefore, positioning of the switchgears with rear side to the wall should be made only when there is not other possibility of switchgeararrangement.

Further steps for the installation of power cables:- Pull in the cable into the cubicle, make the cable terminations as required by the manufacturer and

connect them to the cable connecting flags (811) mounted in the cubicle.

Note: When agreed with the manufacturer, the cable lead-in can be arranged in a different way, forexample by using special cable glands.

6.4.2 Installation of control and indication cables (Fig. 4; 10; 12; 13).

- By loosening the lock screws (819) and pushing down the lever (818) open the doors of the circuit-breaker area (500) and the area with installed voltage measuring transformers (504).

- Remove the cover of control cabling (710) from both the busbar and cable area (500, 504).- Push in the control cabling into the cubicle and fix the cables in position by using special rail clamps

(NIEDAX type) you find in the cubicle for this purpose.- Conformably to the respective wiring diagrams connect the cable ends to the terminal block (661)

installed in the (503) instrument box..

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7. SWITCHGEAR OPERATION

Requirements of occupational safety

All the respective works and procedures to be done must be performed by trained personnel who has beenthoroughly informed about the installation steps, while acting in accordance with the respective safetyregulations and other operating instructions.

7.1 Commissioning

7.1.1 Preparatory works

Before connecting the operating voltage (medium voltage level) the following works have to be done:

- Verify the general state of the switchgear and check for deviations and offsets of all kind (if any).- Make visual inspection of switching devices, withdrawable parts and modules, breaking contacts,

insulation parts etc.- Check the connection between the main earthing clamp (822) and the earthing busbar of the switching

station.- Check for any damaged colour coating and take care for mending any spot damaged, by following the

procedures described in section 9.4.1. (if necessary).- Remove all foreign matters form the switchgear, such as the pieces of installation material, tools or other

items.- Clean the switchgear insulation parts by using a clean, dry, soft and non-fluffy cloth.- Remove any grease and sticky dirt by wiping the switchgear with a cleaning cloth soaked in solvent -

see chapter 11.- Reinstall properly all the covers which were dismounted during the assembly and testing.- Transport covers on the circuit-breaker poles - if still mounted - have now to be dismounted.- If necessary or required, perform the AC voltage test on main circuits according to the IEC 694 standard.

In the course of this testing monitor the state of voltage transformers, cables and other design parts.- Connect the auxiliary and control voltage.- Perform test manipulations with the switching devices, both manually and by using electric control

elements, and monitor simultaneously the respective switching state indicators.- Check the function of mechanical and electrical blocking systems (don(t use any excessive force).- Adjust the protective relays to the defined operation values and check for their proper function.- Check the switching state, the functionality and readiness of upstream (higher level) and downstream

systems connected to the switchgear.- Instruct the operating personnel about the handling principles with the switchgear.

Check and verify also the following devices and equipment, installed in areas next to the switchgear:- power cables- auxiliary cables- additional power supply units - remote control system- complete earthing system- equipment installed at the switching station- operating state of the switching station

- When prescribed by the manufacturer interconnect the respective terminal blocks between thecubicles, by using openings in the side wall of the instrument box.

- Reinstall the control cabling cover (710).

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7.1.2 Switchgear start-up

- Follow all the respective safety regulations and procedures.- Make sure that all the circuit-breakers installed in the switchgear are in OFF position.- Disconnect all links to the earthing system and disconnect all short-circuit jumpers.- Connect the feeding lines.- Subsequently in steps connect the switchgear inlets by simultaneous monitoring of the indication lamps.- If necessary verify the phase sequence, especially in case of more than one inlet feeding lines and

several switchgear sections.- Perform all measurements and check all functions in dependence of feeding lines connected.- Pay attention to all deviations and irregularities of any kind.

7.2 Switchgear control

It is assumed that withdrawable parts of the switchgear are equipped with VD4 vacuum circuit-breakers.Because of safety reasons all handling with and operations done on the switchgear under voltage must beperformed with closed doors of the circuit-breaker area, which means that when switching the circuit-breakers ON or OFF , the pushing in or out from the testing into working position must be done with closeddoors.

7.2.1 Withdrawable circuit-breakers (Fig. 10; 11; 12; 14)

A detailed description of handling steps carried out on the VD4 circuit-breaker during the making andbreaking operations, and all the service and maintenance works are described in the service andmaintenance manual for VD4 breakers - see the document No. BA 352/08E and BA 359/04E.

Circuit-breaker installed on withdrawable module (1001) consists of the VD4 vacuum circuit-breaker (1003)which is secured to a module frame (1002). The pulling-in of the module from testing into working positionis carried out through a screw mechanism (1005) by turning the lever (1006) on the square shaft (1004).The (1007) frame incorporates also all other blocking devices.

When pulling-in the circuit-breaker from the testing into working position the following sequence is to befollowed (see Fig. 10( 11( 12):- Connect the male and female part of the multi-pole socket for the interconnection of auxiliary circuits

512),located between the circuit-breaker and the switchgear. It is essential to make this connection in thetesting position. Otherwise there is a danger of damaging the socket (512) when moving the withdrawablepart with circuit-breaker into working position.

- Verify the switched OFF state of the circuit-breaker.- Engage the lever (1006) with the square shaft (1007) of the screw mechanism (1005) that controls the

in and out movement of the truck.- Turn round the lever (1006) in clockwise direction till the stop (about 20 revolutions of the lever). Now the

withdrawable part finds itself in working (inserted) position.- Verify this position on the indicator.- Remove the lever (1006).

Procedure of pulling out the circuit-breaker from the working into testing position:- Verify the switched OFF state of the circuit-breaker.- Steps to be taken now are the same as when pushing the circuit-breaker into the switchgear cubicle, by

turning the lever (1006) in anticlockwise direction till the testing (disconnected) position has beenachieved.

Transport of the withdrawable module with circuit-breaker outside of the cubicle is carried out using aspecial servicing truck (1010) which is an inherent part of the switchgear delivery. The sequence of steps when pulling the circuit-breaker out from the testing (disconnected) position onto the truck, is as follows:- Open the doors of the switchgear circuit-breaker area.- Bring the servicing truck (1010) close to the switchgear so that the guide pins (1011) are aligned with

therespective openings in the switchgear cubicle. By using the knobs (1017) the height of the truck canbe adjusted in a certain but limited height range. After having adjusted the truck height push the truckinto the cubicle. The lock pin fits into the respective hole in the cubicle and locks the truck in position.

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- Push in the sliding handle (1009) mounted on the withdrawable circuit-breaker module. In this way thelatches (1018) get loosen and now you can displace the module onto the service truck where themodule is fixed in its position through the same latches as in the cubicle.

- Pushing the lever on the front of the truck (1012) to the side loosens the lock pin and you can movethe truck out from the switchgear.

- The unloading of the circuit-breaker from the servicing truck can be performed by using various liftingdevices, such as the crane. In such a case the lifting of the module is to be done only through liftinglugs intended for this purpose only.

The pushing-in of the circuit-breaker module into the switchgear cubicle uses the same operation stepsas described, only with reversed sequence of the steps.

7.2.2 Other withdrawable parts

Pushing the other withdrawable parts in or out from the cubicle (such as the disconnecting jumpers,measuring trucks etc.), and the handling of the service truck in areas outside of the cubicle is the sameas described in section 7.2.1.

7.2.3 Withdrawable modules with disconnecting jumper (Fig. 24)

The interlocking between the jumper and the respective circuit-breaker (e.g. in the bus-tie cubicle) isensured by a solenoid which blocks the movement of a screw-type mechanism (see Fig. 14, item 1005),installed at the jumper module. As long as all the interlocking conditions have been fulfilled the pushingdown of the button in the instrument box doors initiates the solenoid operation and the screw-typemechanism gets loosened. By turning round the lever (1006) by about 2 revolutions the pushbutton canbe loosened and the truck pulled in or out. from the cubicle.

In case of emergency the de-blocking can be performed by lifting the solenoid armature by usinga screwdriver, after unscrewing the M6 (1028) blocking screw on the front panel of jumper module. Thissteps, however, are considered as an exceptional measure which can be performed only after a thoroughverification whether all the respective safety conditions and local safety regulations have been fulfilled.Especially when pulling the module out from the cubicle the no-load state (no-current state) of the circuitis to be verified. Otherwise electric arc on the withdrawable contacts can occur, which could be harmfulfor the operating personnel.

During the module pushing-in the switched off state of the earthing switch has to be verified (ifthere is an earthing switch installed in the circuit). The same checking is to be performed in the adjacentswitchgear cubicles (e.g. in the bus-tie cubicle, in which case the earthing switch also in the adjacentcircuit-breaker cubicle is to be checked). The jumper module can be pushed-in only with switchgear inno-load state.

The sequence of operations when pushing the jumper module in or pulling out is the same as describedin section 7.2.2. Identically it holds that the pushing in or pulling out of the modules under voltage can beperformed with switchgear doors closed, only.

7.2.4 Withdrawable modules with voltage measuring transformers (Fig. 5)

These modules are located in the bottom part of the switchgear cubicle. Position of the module is fixedby means of two locks.

Procedures to be taken when moving the withdrawable module with voltage measuring transformers(1031) out from the cubicle:• Switch OFF the respective switchgear cubicle and establish a short-circuit at the feeding lines.• Open the door of the voltage instrument transformer module (504).• Disconnect the multipole socket of auxiliary circuits (807).• The position of truck inside the cubicle is fixed by two locks that are identical with those on the

switchgear doors. Loosen these two locks by using a key.

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• Now, when taking the handle (1042) and pulling it outwards you can draw out the module from thecubicle.

• Procedures used to introduce the module back into the cubicle are identical with those described above,with a reverse sequence of operating steps. After having achieved the final position fix the module inplace by locking up the locks.

The module is provided with wheels to move the module across the floor which means that it is notnecessary to use a servicing truck. When lifting the module with installed measuring transformers you mayuse only the respective metallic parts of the module body (e.g. fix the suspension cables near the wheels),not to lift the module by clamping it on other parts such as the epoxi compound parts.

The electrical connection of the transformers occurs through flexible contacts (1038) that are in touch withthe coupling bars (1037) installed in the fixed part of the switchgear cubicle.

7.2.5 Earthing switch at the switchgear outlet (Fig. 4; 10; 18; 19)

The earthing switch at the switchgear outlet (cable outlet) can be operated only with withdrawable partsbeing in testing (disconnected) or in disengaged position. Switch ON the earthing switch only afterclosing the switchgear doors!The switchgear cubicle is equipped with a three-pole earthing switch (851), the frame of which is connectedwith that of the switchgear. The flat conductor (bar) that connects the current transformer (505) with thecable connecting flag (811) is fastened with the fixed contact of earthing switch (852) which accepts themoving contact (853) when the earthing switch is switched ON. The moving contact (853) is mounted onthe main shaft (857) which, in turn, is linked with the main earthing bar. The switching ON and OFF of theearthing switch is carried out by an independent spring-type, hand operated mechanism.

Operation of the earthing switch:

Switching ON:

- By pushing down the sliding cover (859) uncover the opening for the earthing switch operating lever. Fiton the lever (858) onto the (860) hexagonal shaft (which terminates the (854) shaft) with the lever handlepointing down.

- Turn round the lever clockwise, by 180°.The movable contacts of the earthing switch (853) are now driven through the drive shaft (854), the guideway (855), the driving lug (856) and the earthing switch shaft (857) and move against the fixedcontacts (852). The earthing switch is making instantaneously.

- The „ON“ position of earthing switch is indicated by the switching state indicator (861) located in an opening below the (860) hexagonal shaft end.

- Pull out the (858) lever.

Switching OFF:

- In the way as described above uncover the opening for fitting in the operating lever. Fit on the lever (858)onto the (860) hexagonal shaft end, with lever handle pointing up.

- Turn round the lever in anticlockwise direction, by 180°.The knife and fixed contacts disconnect instantaneously.

- The earthing switch “OFF” position is indicated by the switching state indicator (861) which can be seenin the opening below the (860) hexagonal shaft end.

- Remove the (858) lever from the cubicle.

Interlocking of the earthing switch as a protective measure against faulty manipulation:

The switchgear is equipped with an interlocking system that prevents the making of the earthing switchwhen the circuit-breaker module is in operating (pushed-in) position. Further on, the pushing-in of thecircuit-breaker module (in order to bring it into working position) is prevented when earthing switch findsitself in making position. Other details about the interlocking system can be found in chapter 12.

15

WARNING!

Before switching the earthing switch ON you are requested to check the voltage-free state of that circuitwhich is to be short circuited.

Additionally, prior each operation to the switchgear the position of circuit-breaker modules is to be checked(whether in disconnected = testing or disengaget position). Prior pushing the module into the cubicle youhave to check for disconnected position of the earthing switch, regardless of the fact that there is amechanical interlocking of the earthing switch. In case of using the lower short-circuited contacts as thecurrent inlet into the switchgear, also the OFF position of an upstream circuit-breaker is to be checked.

Any manipulation to the earthing switch is always to be fully completed, i.e. the control lever turned by180°.

7.2.6 Busbar short-circuiting

On request of the customer the SRUK/SRK switchgear can be equipped with equipment for busbar short-circuiting. This device can be installed either in every of switchgear cubicles or only in specified ones (e.g.one cubicle in one switchgear section which, however, is to be marked in an appropriate way).

In such a case the cubicle and the circuit-breaker module are designed in a way to enable a quite normaloperation of the cubicle (incoming or outgoing cubicle) or, after performing the respective de-blockingmanipulations, to use this cubicle as a busbar short-circuiting device in case of need.

Busbars must be short-circuited during the periods of periodical maintenance and repairs, with therespective section of the switchgear switched OFF (voltage-free state). This kind of manipulation, however,is considered to be an exceptional one and special care is to be taken. The steps to be carried out andprocedures necessary to be adhered to are described, as follows.

Principles of short-circuiting the busbars

Cubicle used for busbar short-circuiting is equipped with earthing switch de-blocking, which means thatafter a specific de-blocking manipulation the simultaneous making (switching ON) of earthing switch andcircuit-breaker is enabled. Now the busbars are interconnected through the current carrying path of thecircuit-breaker and the earthing switch with earthed parts of the switchgear, i.e. with earth.

Working procedures used for the busbar short-circuiting:

- disconnect the feeding voltage from the switchgear and short-circuit all the feeding inputs. Adhere to allthe safety regulations and local operating conditions in effect.

- Insert the circuit-breaker module into that cubicle which is to be used for busbar short-circuiting, bymoving the truck from the testing (disconnected) to the working (engaged) position and by followingprocedures described in chapter 7.2.1. The circuit-breaker module, at its right front side, is provided witha label reading “Earthing switch de-blocking”. Under this inscription you can find the de-blocking segment(see Fig. 22, 23, item 1022), with insulated ball (1023). In normal operating conditions the de-blockingsegment is secured to the truck frame by the M8 hexagonal screw (1024).

- Remove the M8 (1024) screw in a way shown in Fig. 23 and take care of putting it to a safe place.- By pulling on the ball (1023) draw out the de-blocking segment, at a distance of about 50 mm – see Fig.

23.- When doing so the mechanical interlocking between the circuit-breaker and the earthing switch is

cancelled and, when the limit switch is switched ON the system of electrical blocking is de-activated (seeFig. 23, item 1025).

- Switch ON the earthing switch at the cubicle outlet, by using procedures described in chapter 7.2.5.- Once more check the voltage-free state of the busbars!!- Switch ON the circuit-breaker by using pushbuttons on the switchgear panel, or by operating the button

in the remote control room. The switching ON must be performed with closed switchgear doors!- Cubicle the busbars of which have been earthed must clearly be marked with plates, conformably to the

respective safety regulations.

16

- Cancellation of the busbar short-circuit is identical with procedures described above, by following theoperation steps in reversed order. The sequence of operation steps must be followed. We want to makeyour attention especially to the necessity of sliding-in the de-blocking segment on the circuit-breaker (seeFig. 22, item 1022) and putting it into original position. This position is to be secured with the (1024)screw.

7.3 Final works

- Recheck the fastening of all the screws and connections.- Once more inspect visually the whole switchgear and clean the cubicles. The room with installed

switchgear must be cleaned of all remains of installation material.

7.4 Commissioning

After finishing all checks, inspections and after final works the switchgear can be commissioned and putinto operation.

One of the pre-conditions of a defect-free operation and a long service life of the switchgear are themaintenance works that have to be performed correctly and in a prescribed way. These works have to beperformed by personnel that has been qualified and trained in an adequate manner, and informed of thelocal operating conditions. During these works all the safety regulations for works on electric appliancesand equipment according to the standards in effect (IEC, EN) as well as the local regulations have to befollowed.

The maintenance works on VD4 vacuum circuit-breakers are governed by the “Instruction manuals for VD4vacuum circuit-breakers”- No. BA 352/08E – for rated currents of up to 1250 A- No. BA 359/04E – for rated currents above 1250 A.

8.1 Inspections

The term “inspection” denotes a periodical visual checking of all the main switchgear parts under operation,to be performed without any disassembly or without dismounting any part of the system.The inspection includes:- adjustments, such as the adjustment of protection relays- examination of the cleanness of insulating parts- examination of function parts in respect of the wear which can appear on them.

If nonconformities or a deficiency has been found during the inspection, these have to be removed in thecourse of planned or non-planned repair works (according to the type of nonconformity found).

8.2 Maintenance works

The scope of maintenance works is described in chapter 9.3 of this manual. These works are to beperformed conformably to the operating conditions of the switchgear, and have to include especially thefollowing:- function tests and adjustment of control elements- tightening of screw connections- inspection of insulating parts- cleaning- greasing etc.

8. INSPECTION, MAINTENANCE AND REPAIRS AFTER SWITCHGEAR COMMISSIONING

17

9. MAINTENANCE AND REPAIR – DESCRIPTION OF WORKSTEPS

8.3 Repairs

During the repair works all the worn or defective parts have to be replaced, by following the respectivework instructions. Difference is made between the planned and non-planned repairs:- planned repair

This repair is to be carried out after a specified time period or after a defined number of operations.- non-planned repair

This repair is to be carried out when a defect on an equipment in operation appears, or after an excessivestress to which a device or system has been exposed.

8.4 Periods of inspection, maintenance and repairs

The time period for this works depends always on the operating conditions of the switchgear, mainly on thetype of operation, on the number of rated and short-circuit currents switched ON and OFF, the ambienttemperature, the level of contamination etc. It is recommended to perform the maintenance works after thefollowing time periods:

1) In areas with heavy operating conditions (hot atmosphere, dust, humidity) it is recommended toreduce the time interval to a half.

2) Or when circuit-breaker is drawn-out from the cubicle.

9.1 General

Maintenance works and repair can be performed only if the medium and low voltage circuits aredisconnected and earthed. The withdrawable circuit-breaker module is to be drawn-out from the cubicle(see chapter 7.2.1 for the respective operating procedures).

Verify the necessary level of earthing.

9.2 Preparatory works

- Switch the respective circuit-breaker OFF (the connection between the medium voltage line and theswitchgear is interrupted).

- Pull out the withdrawable module from the cubicle -( for the operating procedures see chapter No.7.2.1.

- Disconnect the control voltage and connect all the necessary circuitry to the earth.

9.3 Maintenance

- Clean the both guide rails (823) – see Fig. 16 – and grease them with a thin layer of grease.- Grease the screw mechanism (1005), the latch mechanism (1018) and the withdrawable module

rollers – see Fig. 14.

18

- Grease all the rotating and sliding parts of the earthing switch drive mechanism, such as the gear drive,bearings etc. – see Fig. 19.

- Grease the rotating and sliding parts of the shutters lifting mechanism (808) – see Fig. 16, 17. Removeall dust sediments from the insulating and insulated parts, such as the busbars (507), the bushings(508), fixed contact chambers (805), supports (815), insulating walls etc. – see Fig. 4; 17.

- Check the surface of contacts of power and earthing circuits. The surface must not be affected bycorrosion or damage, the silver coated parts must not be damaged or worn.

- Grease the contact surfaces of the following construction parts:- fixed contacts (809) – see Fig. 8; 17,- earthing pin (821) – see Fig. 16; 17- fixed and moving contact of earthing switch (852( 853) – see Fig. 19.

- Make sure that all the fixing screws are tightened.- Perform function tests and adjustment (if any) of all movable parts (drives, earthing switches, draw-out

of circuit-breaker module etc.). All the switching devices have to exhibit a reliable switching function, withcontacts achieving both of the limit positions.

- Check the function of interlocking system between the circuit-breaker and earthing switch – see chapter12.

Cleaning agents and greases: see the respective table in chapter 11.

Cleaning clothes: see chapter 11.

9.4 Repairs

Repair works conducted on switchgear, in principle are identical with those carried out during maintenance(see section No. 9.3). In addition, these works include also the replacement of worn or defective parts andrepairing of damaged colour coating.

9.4.1 Switchgear in general

- When discovering a defect repair it immediately.- Remove all rust from the spots with damaged colour coating and on all the other steel parts, by using

mechanic aids such as the steel brush.- Grind carefully the surrounding area around the damaged spot and degrease it. Immediately after this

apply primer on the ground spot and after a specified time period for drying apply a second layer of paint.The whole thickness of a dry paint should be about 60 microns. Use only coating materials consistentwith the previous coating layer. The final coating layer shall normally be in RAL 7032 tint, or in specifiedcolour shade.

- Surfaces of sliding or rotating parts (shafts, pull-rods etc.) should not be protected with colour paintingbut greased with uniform layer of grease.

9.4.2 Procedures to be followed when replacing a specific part of the switchgear

a) Replacement of fixedly mounted voltage transformers:- Power supply circuits are always to be disconnected and earthed.- Open the doors of voltage measuring transformer area (see Fig. 4, item 504) in the lower part of the

switchgear, or the doors of switchgear superstructure (see Fig. 21, item 1040).- Disconnect the inlets with medium feeding voltage.- Disconnect the secondary wiring from the transformer terminal board.- Unscrew those screws that secure the transformer to the base frame.- Replace the transformer and reconnect all the conductors of the secondary circuits to the transformer

terminal board. Take care of a correct connection of the transformer.

b) Replacement of the withdrawable voltage transformer of TJP 4.1 (TJP 4.2) type (Fig. 5( 20):- The feeding circuit has to be disconnected and earthed.- Open the doors of the area with voltage measuring transformers (504) in the bottom part of cubicle.- Draw-out the module with measuring transformers (1031) – for procedures to be taken see chapter

7.2.4).- Disconnect the conductors of secondary circuits from the transformer terminal board.

19

- Loosen the fixing screws of the transformer.- Replace the transformer. Take care of a correct connection of the transformer secondary windings.- Unscrew the cover of transformer fuse (see Fig. 20, item 1034) and replace it with another cover that

is provided with an extended flexible contact. Take this cover from the original transformer. The transformers delivered as spare parts are not provided with this contact.

- Push-in the module back into the switchgear cubicle (procedures to be applied – see chapter 7.2.4).

c) Replacement of fuse insert of the current measuring transformer of TJP 4.1 (TJP 4.2) type (Fig. 20):Follow the instructions stated in the point a) or b) of this chapter, until the moment when the module (1031) or the transformer are pulled out from the cubicle.- Unscrew the end cover (1034), pull out the spring (1033) and the fuse insert (1032). After having

replaced the fuse screw the end cover (1034) back.- Slide in the withdrawable module back into the cubicle and secure it by using locks (reinstall the fixed

mounted transformer into the cubicle).

d) Replacement of the current transformer (Fig. 4( 19)- Disconnect the feeding lines from the transformer (at the busbar or the outlet) and connect them with

earth.- Remove the switchgear rear covers (523, 525).- Disconnect the primary and secondary windings and the earthing clamp of the transformer.- Reinstall a new transformer and reconnect the transformer primary winding. Take a special care of

correct positioning of the fixed contact of the earthing switch (852) which is a part of flat bar that connects the current transformer (505) with the (815) supporting insulator.

- Check for correct sliding movement of the earthing switch moving contacts (853) into the fixed contacts (852). Grease the contacts (852, 853)with a thin layer of grease.

- Reconnect the transformer secondary winding , make the earthing connection and reinstall the terminalblock cover.

- Reinstall the rear covers of switchgear (523, 525).

e) Replacement of contacts chamber (see Fig. 4( 8, item 805) and the fixed contact (809) -( for rated currents of up to 1250 A:- Make sure the FEEDING circuit is disconnected and earthed.- Pull out the withdrawable circuit-breaker module (1001) from the circuit-breaker area (500) by

following the procedure described in section 7.2.1.- By loosening the M10x80 (1073) screw (with hexagonal socket head) remove the fixed contact (809)

from the inside of the (805) chamber. Use the 8 mm hexagonal key.- Disconnect the conductor (509) that connects the chamber (805) with busbars or, when replacing the

ower chamber, disconnect the conductor that links the chamber (805) with the (505) current transformer.

- Remove the 4 pieces of M8x30 (1074) hexagonal socket head screws that secure the (805) chamberto the (1071) steel sheet partition wall. Access to the (1074) screws is provided after removing the (1072) cover.

- By following reversed order of operating steps perform the reassembly. Retighten the M10 (1073) screw with a torque of 45 Nm. This torque value is essential and must be adhered to!

f) The same mounting and dismounting procedures apply for the replacement of contact chambers designed for rated currents of 2000 A and higher (see Fig. 8s). In this case the fixed contact (728) insidethe (730) chamber is secured in position by using one M20 hexagonal socket head screw (720) and secured with three Belleville springs (721) with washer (725). During the reassembly the (720) screw is to be tightened with a torque of 120 Nm. This value is essential and must be adhered to!

g) Torque values:All screws used as connecting elements for flat bars and installed in the current carrying path shall betightened with the following torque:

Screw dimension Torque (Nm) M6 3M8 6M10 10M12 15.5

20

12. INTERLOCKS/PROTECTION AGAINST MALOPERATIONA series of interlocks are provide to prevent fundamentally dangerous situations and any maloperation withposibly serious consequences, thus protection both personnel and switchboard itself. The interlocks whichare normally individually effective are as follows:

- The withdrawable part can only be moved from the test/disconnected position into the service position (and back) with the circuit breaker open and the earthing switch open (mechanical interlock).

- The circuit-breaker can only be closed when the withdrawable part is precisly in the defined test positionor service position (mechanical interlock).

- The circuit-breaker can only be opened manualy in the service or test position when no control voltageis applied, and be closed (elektromechanical interlock - on request).

- Low-voltage plug (512) can only be inserted or removed when the withdrawable part is in the test/disconnected position.

10. SPARE PARTS

The above torque values do not apply for the assembly of busbars of ( 70 mm. In this case follow theprocedures described in section 6.3.2. In addition, these value do not apply for mounting the fixed contacts(809( 728) into the (805( 730) chambers – see above.

List of spare parts is available with the manufacturer and can be obtained on request. The package of spareparts includes all those construction parts and units that are exposed to wear, as well as all other movingparts. When ordering do not forget to specify the respective production number of switchgear cubicle, thetype of switchgear and the production year.

11. LIST OF LUBRICANTS AND CLEANING AIDS

Notes:DO USE HALOGEN-FREE PRODUCTS, ONLY (SEE ABOVE).Do not use trichlorethane, trichlorethylene or carbon tetrachloride !!

Cleaning clothesAs cleaning clothes should be used only woven or non-woven fabrics, made of natural fibres or leather.

These materials should be:- fluffy-free- without any aggressive chemical compounds

Borders of the woven fabrics should be provided with hem. Do not reuse contaminated clothes!

The above lubricants and cleaning aids can also be ordered directly with the manufacturer.

21

13. OTHER RELATED CATALOGUES AND OPERATIONMANUALS

issued by ABB EJF s.r.o.:

• 358-174-I/1995 TPU – Current instrument transformers • BA 352/08E Vacuum circuit-breaker VD4 (up to 1250 A ) • BA 359/04E Vacuum circuit-breaker VD4 (over 1250 A ) • 358-020-III/1994 TJP and TDP Voltage instrument transformers • 358-173-I/1995 TJC and TDC Voltage instrument transformers

- Earthing switch can only be closed when the withdrawable part is in the test/disconnected position or theremoved posicion (mechanical interlock). In order to comply with the external blocking conditions theearthing switch can additionaly be equipped with a blocking sdenoid.

- The withdrawable part cannot be moved from the test/disconnected position into the service position when the earthing switch is closed (mechanical interlock).

- Details of any additional interlocks, e.g. the links of such systems to the bus ties and links to adjacent systems can be found in order documents for each individual case.

22

Fig. 1

SWITCHGEAR BASE FRAME

23

Fig. 2

FOUNDATIONS FOR THE SWITCHGEAR INSTALLATION,WITH CABLE OPENINGS

24

Fig. 3DIMENSIONED SKETCH

25

Legend to fig.4 and 5

500 - Circuit-breaker area501 - Busbar area502 - Cable area503 - Instrument box504 - Area with voltage measuring transformers505 - Current measuring transformer507 - Busbar509 - Busbar branch511 - Shutters512 - Multipole socket for auxiliary circuits521 - Busbar area front cover523 - Busbar area rear cover524 - Partition wall525 - Cable area rear cover526 - Busbar area upper cover805 - Fixed contacts chamber807 - Multipole socket for voltage transformers auxiliary circuits811 - Cable connecting flag812 - Earthing busbar815 - Support851 - Earthing switch852 - Fixed contact of earthing switch1001 Withdrawable module with VD4 circuit-breaker1031 - Withdrawable module with voltage measuring transformers1036 - Fixed mounted voltage measuring transformers1037 - Coupling bar1038 - Flexible contact of voltage measuring transformer

26

Fig. 4 CROSS SECTION OF SWITCHBORD CUBICLE IN BASICARRANGEMENT

27

Fig. 5CROSS SECTION OF SWITCHBORD CUBICLE WITH WITHDRAWABLEVOLTAGE MEASURING TRANSFORMERS

28

Fig. 6

507 - Busbar509 - Busbar branch536 - Connecting point cover (made of two parts)540 - Clamp541 - Plate542 - Disk spring543 - M10 nut

29

Fig. 7

507 - Busbar509 - Busbar branch535 - Busbar end piece537 - Insulation end cover 540 - Clamp541 - Plate542 - Disk spring543 - M10 nut

30

Legend to fig.8, 8a

Fig. 8 - Switchgear cubicles with rated current up to 1250 A:

507 - Busbar (1250 A)509509 a509 b - Busbar branches540 - Clamp541 - Plate542 - Disk spring543 - M10 nut805 - Fixed contacts chamber (up to 1250 A)809 - Fixed contact1071 - Partition wall1072 - Cover1073 - M10 bolt (hexagonal socket head screw)1074 - M8 bolt (hexagonal socket head screw)1076 - Spring washer

Fig. 8a - Switchgear cubicles with rated current 2000 A and above

720 - M20 bolt (hexagonal socket head screw)721 - Disk spring722 - Plate723 - Busbar (2000A and above725 - Washer728 - Fixed contact729 - Busbar branch1071 - Partition wall1072 - Cover1074 - M8 bolt (hexagonal socket lead screw)1075 - M10 bolt (hexagonal socket lead screw)

31

Fig.8

32

Fig.8a

33

Fig. 9

537 536

508

509

507

805

507 - Busbar508 - Busbar bushing509 - Busbar branch536 - Connecting point cover537 - Insulation end cover cap805 - Fixed contacts chamber (up to 1250 A)

34

Fig. 10

819

818

858

1006

818 - Lock up door opening lever819 - Lock screw858 - Earthing switch lever1006 - Operating lever

35

Fig. 11

512

1001

1013

1014

1016

1015

1017

10101012

1011

512 - Multipole socket for auxiliary circuits1001 - Withdrawable module with VD4 circuit-breaker1010 - Servicing truck1011 - Guide pin1012 - Lock pin1013 - Pushbuttons ON-OFF1014 - Indicator of circuit-breaker operating state1015 - Indicator of energy accumulated in the spring1016 - Operating lever opening for energy accumulation 1017 - Knob

36

Fig. 12

512 - Multipole socket for auxiliary circuits710 - Control cables cover1001 - Withdrawable module with VD4 circuit-breaker1003 - VD4 circuit-breaker1008 - Tulip contact (contact rosette)1010 - Servicing truck1017 - Knob1019 - Guide rails for shutter lifting

512

710

1008

1019

1017

1010

1003

1001

37

Fig. 13

503

661

503 - Instrument box661 - Terminal block

38

Fig. 14

1004 1005

1002

1007

100610091018

1002 - Module frame1004 - Blade earthing contact1005 - Screw mechanism1006 - Operating lever1007 - Square shaft1009 - Sliding handle1018 - Latch

39

Fig. 15

522

522 - Earthing clamp

40

Fig. 16

806

808

823

821

512 - Multipole socket for auxiliary circuits806 - Shutters808 - Shutter lifting mechanism821 - Earthing pin823 - Guide rail

512

41

Fig. 17

806

805

809

821

805 - Fixed contacts chamber806 - Shutters809 - Fixed contact821 - Earthing pin

42

Fig. 18

860

861

859

859 - Sliding cover860 - Hexagonal shaft861 - State indicator

43

Fig. 19SKETCH OF EARTHING SWITCH INSTALLED IN CUBICLE

851 - Short-circuiting device (earthing switch)852 - Fixed contact853 - Moving contact854 - Drive shaft855 - Guideway856 - Driving lug857 - Earthing switch main shaft

44

Fig. 20

1032 - Fuse insert1033 - Spring1034 - End cover1035 - Single-pole insulated voltage

transformer of TJP 4.1, (TJP 4.2) type

45

Fig. 21

1036 - Fixed mounted voltage measuring transformer1040 - Additional box with installed voltage measuring

transformers (for busbar voltage measurement)

46

Fig. 22

1022

1024

1023

1022 - Deblocking segment1023 - Ball1024 - M8 Screw

47

Fig. 23

1022

1023

1025

1024

1022 - Deblocking segment1023 - Ball1024 - M8 Screw1025 - Limit switch

48

Fig. 24

1008 - Tulip contact1010 - Servicing truck1026 - Withdrawable module with

disconnecting jumper1028 - M6 blocking screw

1028 1026

1008

1010

49

ABB EJF s.r.o. Tel.: +420 5 4715 2465Vídeňská 117 +420 5 4715 2729619 00 Brno +420 5 4715 2782Czech Republic Fax: +420 5 4715 2451E-mail:info@abbejf.cz +420 5 4715 2192http://www.abbejf.cz +420 5 4715 2190

A35

7-28

7-I/1

999M

2005

.07.

14

Information given in this publication is generally applicableto equipment described in the time of issue. Changes maybe made in future without notice.