OperatiOns, installatiOn and Maintenance Manual

1 OperatiOns, installatiOn and Maintenance Manual installatiOn , Operation and Maintenance Manual 3 CONTENTS 1 Summary ..7 General Construction ..7 Standards and specifications ..7 Operating conditions ..8 Normal operating Special operating conditions ..8 Safety 2 Technical data ..9 Electrical data ..9 Dimensions and 10 3 General Construction .. 11 Basic structure and variants .. 11 Busbar compartment .. 12 Circuit breaker compartment .. 12 Cable connection/VT Low Voltage Compartment .. 13 Withdrawable and fixed equipment .. 14 Circuit Breaker .. 14 Voltage transformers .. 17 Current transformers .. 17 Voltage Detection System .. 18 Earthing switch .. 18 Enclosure and 19 Ventilation of the 19 The exhaust gas compartment .. 20 The gas duct .. 21 Typical Units .. 22 Incoming panel.

2 22 Outgoing panel .. 23 Busbar Tie (Bustie) .. 24 Busbar riser .. 26 Measurement panel (Client-specific optional) .. 27 4 28 Interlock Cross reference 28 Withdrawable equipment racking with door open interlock .. 30 Circuit breaker racking 30 Circuit breaker CLOSE 30 Circuit breaker CLOSE 31 Withdrawable equipment - latching handles .. 31 Socket board interlock .. 32 Circuit breaker secondary plug connector coding .. 32 Withdrawable equipment door interlock .. 33 Earthing switch interlocks .. 34 Door 35 5 Packing Transport and Storage .. 38 Condition on delivery .. 38 4 installatiOn , Operation and Maintenance Manual 38 Transport .. 39 Control on 39 Intermediate storage ..40 Handling the Switchgear ..40 Unpacking and switchboard handling .. 41 Handling the removable 42 6 installatiOn .

3 43 installatiOn - General Information .. 43 Foundation and switchgear 44 Tightening torque table .. 44 Foundation details .. 44 Fixing with unistruts foundation 46 Fixing with anchoring bolts (Expanding type bolts) .. 47 Position and fixing the units on the foundation .. 47 Main Busbar Assembly .. 49 Unit 53 installatiOn of Gas Compartment .. 54 The gas duct .. 56 Connection of Inter-unit auxiliary wiring (Bus-wiring) ..57 Connecting the auxiliary multicore cables .. 57 Front bottom 57 Rear bottom entry .. 58 Low voltage wiring 58 Power cable termination .. 59 Cable supports and grommets for single core cables .. 61 Cable gland for 3 core 62 installatiOn of the decorative end covers .. 63 Installing the tool 67 Aligning the door racking access hole to the circuit breaker drive .. 67 Final check.

4 68 Circuit name label .. 68 Extending the 68 7 Operation .. 69 Operating Accessories .. 69 Circuit breaker 70 Removed 70 Isolated/ test 71 Service Position .. 71 Inserting the Circuit breaker into the panel from the removed 72 Racking the circuit breaker from the isolated/test position to the service position .. 74 Withdrawal from service to isolate/test position .. 75 Removal of the circuit breaker from the 75 Padlocking the shutters .. 76 Operating the circuit breaker in the isolated/test position with door open .. 76 Spring charging .. 76 Circuit breaker 77 Circuit breaker 77 Operating the circuit breaker in the service position with door 77 Manual spring 78 Manual switching ON with door 78 Manual switching OFF with door 79 Electrical 79 installatiOn , Operation and Maintenance Manual 5 Electrical spring charging.

5 79 Switching 80 Switching 80 VT Compartment .. 81 Withdrawable VT .. 81 Earthing .. 83 Switching ON the earthing switch .. 84 Switching OFF the earthing switch .. 85 Optional Voltage Detection System VDS .. 85 8 Commissioning checks and test programme .. 86 General 86 Electrical 87 Mechanical Tests .. 87 Recording .. 88 Check Lists .. 89 Counter Recording ..90 9 General 91 Intervals for inspection, servicing and repairs .. 92 92 Servicing .. 93 Maintenance in busbar 94 Maintenance in cable Maintenance in circuit breaker compartment .. 98 Checking correct operation of the protection 99 Cleaning and checking the auxiliary connections .. 99 Repairs .. 100 Switchgear in general .. 100 Testing interlock conditions .. 100 Spare parts, auxiliary materials and 100 Spare 100 Accessories, Auxiliary materials and 101 6 installatiOn , Operation and Maintenance Manual Safety Warning Only install switchgear and/or switchboards in closed rooms designed and constructed specifically for electrical equipment.

6 Ensure that installatiOn , operation and Maintenance are carried out by trained and qualified personnel only. Fully comply with the legally recognized standards (IEC or local), the local electrical utility and the applicable safety at work regulations. Observe the relevant information in this instruction Manual for all actions involving operation and Maintenance of the switchgear. Before working on the Switchgear it is necessary for the operator to ensure that it has been safely disconnected from electrical supplies and that the necessary safety earths have been fitted and a suitable permit to work issued. To assist in its safe operation, the equipment is fitted with padlocking facilities which shall be applied as appropriate. Ensure that the operating conditions do not exceed the specified data.

7 Keep the instruction Manual accessible to all personnel involved in installatiOn , operation and Maintenance . Operations not included in the Manual must be carried out by or under the supervision of Medelec Switchgear Ltd. This Manual uses certain terms and symbols to warn about dangers or provide information: WARNING Warns about dangerous electrical voltage or contact with voltage. CAUTION Warns about risk of injury. NOTE - Gives important information to avoid damage to equipment General instructions Medelec Switchgear Ltd has done its utmost to inform users as accurately and as fully as possible concerning any dangers involved in using the equipment. Users are responsible for supervising the implementation of the instructions contained in this Manual . Before commencing work and after the completion of work any control switches shall be left in the appropriate positions.

8 Should the operator require any guidance or advice regarding the equipment this can be obtained by contacting Medelec Switchgear Ltd. Our policy is one of continuous product development and the right is reserved to supply equipment, which may vary slightly from that described. installatiOn , Operation and Maintenance Manual 7 1 Summary General Construction is a three-phase, metal-clad, air insulated , internal arc certified switchgear of modular construction. All the units are factory assembled, type-tested and suitable for indoor applications up to 12kV. The units are designed as modules and are fitted with a single busbar system. The withdrawable parts are equipped with vacuum circuit breakers. Existing units are easily extendable from both sides if the site permits. All the unit compartments have metal segregations between them and the live parts are insulated in air.

9 The cubicles are all factory-cabled. The installatiOn requires only the external power and auxiliary connections and the wiring between the various units, together with the assembly of the main busbar, the exhaust gas Compartment on top of each unit and the decorative end covers. The normal service operations are performed from the switch-board front with all the doors closed. Only Maintenance and replacement of spare parts require opening of the front doors. All functions are easily accessible by the operator. is for use on distribution networks having the highest system voltage up to 12kV, a short circuit current rating up to , a maximum full load current of 2000A and a lightning impulse level up to 75 kVp (BIL). Standards and specifications switchgear panels comply with the standards and specifications for factory-assembled, metal-enclosed and type tested high voltage switchgear to IEC 62271-1 and -200.

10 The switchgear panels have the following degrees of protection: IP4X for the enclosure and IP2X for the partitions to IEC 60529. switchboards are arc-proof and comply with IEC 62271 Standards Accessibility Class AFLR. The components used comply with standards: IEC 62271-100:High-voltage alternating current circuit breakers IEC 62271-102:Alternating current disconnector and earthing switches IEC 61869-2:Instrument transformers -part 2:Current transformers IEC 61869-3: Instrument transformers - part 3: Voltage transformers IEC 62271-206 For the voltage presence indication system 8 installatiOn , Operation and Maintenance Manual Operating conditions Normal operating conditions The switchgear is suitable for normal operating conditions for indoor switchgear and switchboards in accordance with IEC 60694.