L&T Electrical & Automation GIS GV3N Operation & Maintenance Manual Download Page 3

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INTRODUCTION

Operation & Maintenance Manual

1.0 INTRODUCTION

This manual describes the fundamental handling, operation &
maintenance of the GIS GV3N switchgear and its standard
handling procedures.

This metalclad SF6 Gas Insulated Switchgear, GV3N with all its
devices housed within a compact cubicle and gas sealed is a type
tested indoor cubicle for rated voltages up to 36kV.

GV3N

The cubicle is tted with a vacuum circuit breaker for single
busbar system. The insulating medium is SF6 subjected to a
minimum pressure.

Summary of Contents for GIS GV3N

Page 1: ...OPERATION MAINTENANCE MANUAL TYPE GIS 36 kV CUBICLE...

Page 2: ...DATION WORK CUBICLE INSTALLATION CONNECTING CONTROL WIRING CONNECTING POWER CABLE INSPECTION AFTER INSTALLATION COMMISSIONING TESTING PRELIMINARY CHECKS TESTING START UP SWITCHING OPERATIONS SAFETY IN...

Page 3: ...and its standard handling procedures This metalclad SF6 Gas Insulated Switchgear GV3N with all its devices housed within a compact cubicle and gas sealed is a type tested indoor cubicle for rated vol...

Page 4: ...cuit Making Current Rated short circuit symmetric breaking Current Rated Lighting Impulse Voltage 1 2 50 Micro Sec Rated A C 1 min pf voltage Width Depth Height A Hz kA 3sec kAp kA kVp kV rms mm mm mm...

Page 5: ...CONTACTS 1 CONTACT FOR ALARM 1 CONTACT FOR TRIP 2 VIEWING WINDOW FOR DISCONNECTOR SWITCH 3 HANDLE FOR METERING COMPARTMENT 4 BREAKER COMPARTMENT SF6 GAS PRESSURE MONITORING DEVICE WITH 2 CONTACTS 1 CO...

Page 6: ...MONITORING DEVICE 6 VIEWING WINDOW FOR BREAKER STATUS 7 HOLE FOR ROUTING INTER PANEL WIRES 8 BUSBAR DISCONNECTOR SWITCH COMPARTMENT 9 DUCT FOR HOT GAS 10 REAR COVER 11 PRESSURE RELIEF FLAP 12 POWER CA...

Page 7: ...wo contacts shall be open 1 When gas pressure decreases to less than 1 25 Kg cm contact with terminal no 3 4 becomes Close This contact can be used to give an alarm so that gas can be re lled before g...

Page 8: ...lled in the panel to check if the weld has removed the leakage and there is no further leakage after which the SF6 gas is lled in the equipment at a desired pressure of 1 35 bar The detailed procedure...

Page 9: ...hackles and ensure that lifting hooks are locked properly Transport switchgear panels upright only Carry out loading operations only when it has been ensured that all precautionary measures to protect...

Page 10: ...k should not be more than 120 degrees Rope with appropriate strength to be used 2 When the equipment is hauled on manual lifting truck be sure that the pallet is of suf cient loading capacity Furtherm...

Page 11: ...ll ventilated environment The storage area must shelter the equipment from deterioration by agents like Water Water Vapour Salt Laden air Pollution of any type Micro organisms Store switchgear panels...

Page 12: ...ed slightly dilute the dry greases with neutral paraffin oil 10 12 times manoeuvres should be carried out in order to check the mechanical operation of the equipment The minimum threshold 85 of Un of...

Page 13: ...d on at oor and channels Adjustment on the M12 anchor bolts is required to level the frame on which the switchgear is to be installed Leveling must be done with an accurate level gauge If not level th...

Page 14: ...600 600 REAR PANEL FIN FL LVL CEMENT FILLING FOR LEVELING WITH FINISHED FLOOR LEVEL 1400 350 200 100 52 74 75 X 125 X 6 EDGE ANGLE 50 X 100 X 6 ISMC PANEL ALONGWITH BASE FRAME FRONT FIN FL LVL FLOOR O...

Page 15: ...foundation frame should be installed so that the level errors of installed bases fall within the range shown in gure 5 2 2 a b 1 Front View of Foundation Frame L Length of frame in the cubicle width...

Page 16: ...5 2 4 5 3 Cubicle Installation 5 3 1 Location of Fastenings GIS is divided into unit cubicles Parts bolts nuts etc used for installation are packed in a vinyl bag with a tag and attached to the cubic...

Page 17: ...Handling of components without hand gloves 2 Misalignment of bushings busbar 3 Using additional force during coupling use only lead screw or hydraulic jack as mentioned in O M manual 4 After applying...

Page 18: ...position of the power cable and mount the cable gland plates onto the welded studs at the cubicle base plate Tighten the nuts securely e If there is any gap between the power cables to ll the gap with...

Page 19: ...nals and indicators 5 Watch for any abnormalities 6 4 SWITCHING OPERATIONS 6 4 1 POSITION ISOLATION The 3 position disconnecting switch selects one of three positions ON OFF and Earth by a pair of bla...

Page 20: ...an t be operated either mechanically or electrically when Isolator is accessed 2 Permissive Earth Feeder Bus Coupler Riser Premissive Earth PE 1 In normal condition key will not be available in PE loc...

Page 21: ...cess cover is OPEN Padlocking Facility 1 Metering DS mechanism compartment door handle 2 VCB compartment door handle 3 Aux front cable entry compartment door handle 4 DS operating hole pad loack Visua...

Page 22: ...Q1 Q2 STEP 2 BUS Q0 Q1 Q2 STEP 3 BUS Q0 Q1 Q2 STEP 4 BUS Q0 Q1 Q2 1 SWITCHING VCB INITIAL STATUS Q1 OFF Q0 OFF Q2 OFF CONNECTING CABLE TO EARTH BUS Q1 OFF Q0 OFF Q1 OFF Q0 OFF to ON Q2 OFF to ON Q2 ON...

Page 23: ...ce is standard operating sequence If any key interlocks key exchange are provided please refer key interlock arrangement provided by Design SWITCHING SEQUENCE INITIAL STATUS Q1 OFF Q0 OFF Q2 OFF CONNE...

Page 24: ...re provided please refer key interlock arrangement provided by Design INITIAL STATUS Q1 OFF Q0 OFF Q2 OFF CONNECTING BUSBAR TO EARTHING Q1 OFF to ON Q3 OFF to ON Q1 ON Q3 ON Q0 OFF Q0 OFF to ON DISCON...

Page 25: ...equence is standard operating sequence If any key interlocks key exchange are provided please refer key interlock arrangement provided by Design SWITCHING SEQUENCE INITIAL STATUS Q1 OFF Q0 OFF Q2 OFF...

Page 26: ...age of gas piping Gas pressure Monitor indication if Monitor is provided Operating devices Cleaning oiling and greasing Facility as a whole Facility as a whole Circuit breaker Tightness of terminals o...

Page 27: ...ction should be performed 7 2 Classi cation of Maintenance and Inspection 1 Routine Patrol Inspection This inspection is performed externally while the panel is in operation such as voltage and curren...

Page 28: ...nce Manual OPERATION AND MAINTENANCE MANUAL TYPE GIS DISCONNECTING SWITCH Introduction Speci cations Disconnecting Switch Operating Mechanism Interlock Features Maintenance Inspection Criteria and Sta...

Page 29: ...EXTERNAL VIEW FACIA OF DISCONNECTING SWITCH POSITION OF SWITCH BLADES OPERATING MECHANISM ELECTRICAL OPERATION MANUAL OPERATION EMERGENCY OPERATION INTERLOCK FEATURES STANDARD WIRING DIAGRAM MAINTENAN...

Page 30: ...ed for installation in the gas insulated switchgear type GV3N and its performance is guaranteed under the condition that a speci ed pressure of SF6 gas is sealed in the GIS The conditions of use shall...

Page 31: ...TIONS 2000A 1250A 630A kV Rated Current Rated Frequency Rated Short Time Current Rated short circuit Making Current Rated short circuit symmetric breaking Current Rated Lighting Impulse Voltage 1 2 50...

Page 32: ...vice is transferred through the connecting shaft to the rod and blade As the shaft rotates the insulating rod drives the blade to select xed contacts and the drive link are located inside a gas compar...

Page 33: ...The contacts are made of drawn copper conductors Earth contacts are connected to the cubicle framework In the CLOSE operation the blades connect the breaker to the busbar Whilst in OPEN operation the...

Page 34: ...erating Mechanism shaft charging the closing spring Towards the end of the operation the closing spring will be released and this released energy drives the mechanism to rotate at high speed This mech...

Page 35: ...t for the next motor operation Rotate the shutter knob anticlockwise to remove the operating Caution Before Manual Operation 1 Do not attempt to operate the Disconnecting switch if the circuit breaker...

Page 36: ...10 K10 17 L4B K8 8 5 12 K1 1 3 K3 7 10 15 K4 4 2 K2 3 XK1 XH1 XH1 XH1 XK1 XK1 XH1 XK1 XK2 XH2 K6 6 L8 C L8 17 XH2 XH2 XK2 C1 20 L7B L5 12 61 L9 23 c1 c2 25 c4 27 29 c6 31 b1 b2 b3 33 35 b4 37 39 b5 4...

Page 37: ...Servicing Criteria The inspection intervals should be shortened for equipment used in adverse conditions 4 0 MAINTENANCE INSPECTION CRITERIA 4 2 Contents of Inspection Check points in visual ordinary...

Page 38: ...of link Greasing state in sliding and rotating parts Warping or galling of parts Oiling machine oil state in sliding and rotating parts Remove old grease and apply new grease Lubrication and operation...

Page 39: ...STANDARD ACCESSORIES Operation Maintenance Manual 10 5 1 Manual Operating Handle 5 0 STANDARD ACCESSORIES Figure 5 1 Manual Operation Handle...

Page 40: ...Operation Maintenance Manual OPERATION AND MAINTENANCE MANUAL TYPE GIS BREAKER GV3N Introduction Speci cations VCB Maintenance and Standard Accessories...

Page 41: ...REAKER OPERATING MECHANISM MOTOR CHARGING MECHANISM MANUAL EMERGENCY CHARGING CLOSING OPENING OPERATION OF CONTROL CIRCUIT CLOSING SPRING CHARGING OPERATION OPENING OPERATION FIGURES STANDARD WIRING D...

Page 42: ...performance is guaranteed under the condition that a speci ed pressure of SF6 gas is maintained in the GIS The circuit breakers conform to IEC 62271 100 within the parameters of their technical data...

Page 43: ...e time Typical opening time at minimum volts Spring motor charging time Electrical Characteristics Rated Voltage 2500A 2000A 1250A 630A kV Rated Current Rated Frequency Rated Short Time Current Rated...

Page 44: ...s is the point of contact separation and from this point the momentum and the continuing action of the opening springs alone pull the coupling rods and thus the interrupter contacts to the fully open...

Page 45: ...ime 10secs During this closing operation the b contact of the auxiliary switch is turned off and also the energised relay Y opens it contact Yb to complete the pumping prevention circuit Thus if the s...

Page 46: ...REAKER Operation Maintenance Manual 05 Figure 3 3 4 shows the front view of the operation mechanism with the front fascia of the Circuit breaker mechanism removed Figure 3 3 4 a Front View of The Oper...

Page 47: ...02 B03 B04 B05 a3 a4 a5 b2 b3 b4 b5 a2 a1 A3 A4 A5 B2 B3 B4 B5 K2 HT2 K HT VE VE ON P B ON P B Y TC1 TC2 VE LEGEND DESCRIPTION Y Y b X X a X b TC1 M CC AUX RELAY Y RELAY N C CONTACT CONTROL RELAY X RE...

Page 48: ...y Detailed Visual check Category Check point Operation Greasing Loose bolts and nuts Dust and foreign matters Dislocated parts Filling and chips Indication of indicator and Counter Deformation damage...

Page 49: ...STANDARD ACCESSORIES Operation Maintenance Manual 08 5 1 Manual charging handle 5 0 STANDARD ACCESSORIES...

Page 50: ...ND TYPE SEMAPHORE INDICATOR SHAPE SQUARE TYPE CLOSING COIL TRIPPING COIL INDICATING LAMP MANUAL DS OPERATING HANDLE MANUAL SPRING CHARGING HANDLE ELECTRIC CONTACT GREASE MECHANICAL CONTACT GREASE TOUC...

Page 51: ...each panel Gas Filling Plug the unit into a suitable power supply Close all valves Make sure the vacuum compressor power switch is OFF Connect one end of equipment hose to the equipment being charged...

Page 52: ...ep the vessel you are drawing gas from warm This applies to the onboard tank or external vessel FINISH FLOOR LEVEL FRONT VIEW MANDATORY SPARES Operation Maintenance Manual 11 Figure 1 Showing Arrangem...

Page 53: ...XDS Operator panel 1 2 3 4 5 Sl No Mandatory Spares Spares for GAS lling Description SF6 GAS pressure manometer SF6 GAS REFILLING EVACUATING MODEL GFU10 SF6 IR LEAK DETECTOR MODEL GIR 10 SF6 Gas Cylin...

Page 54: ...NOTE Operation Maintenance Manual 13...

Page 55: ...NOTE Operation Maintenance Manual 14...

Page 56: ...Dandenong 3175 Melbourne Victoria Australia Tel 613 9706 7288 Email sales tamcoaustralia com au Web www tamcoaustralia com au India Level 2 Unnati Building Automation campus A 600 TTC Industrial area...

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