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Summary of Contents for L&T Electrical & Automation GIS GV3N
- Page 1 OPERATION & MAINTENANCE MANUAL TYPE GIS 36 kV CUBICLE...
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Page 2: Table Of Contents
CONTENTS - 1 (GV3N), 2 (DS30), 3 (GV3N) Description Page Cl No INTRODUCTION SPECIFICATIONS STANDARDS & OPERATING CONDITIONS TECHNICAL DATA NORMAL SERVICE CONDITIONS FOR INDOOR STRUCTURAL DETAILS & GENERAL ARRANGEMENT CUBICLE STRUCTURE TYPICAL ARRANGEMENT SF6 GAS SYSTEM PRESSURE RELIEF DISC HANDLING &... -
Page 3: Introduction
This manual describes the fundamental handling, operation & This metalclad SF6 Gas Insulated Switchgear, GV3N with all its maintenance of the GIS GV3N switchgear and its standard devices housed within a compact cubicle and gas sealed is a type handling procedures. -
Page 4: Specifications
SPECIFICATIONS 2.0 SPECIFICATIONS 2.1 - Standards and Operating Conditions: Operating conditions: The GV3N SF6 Insulating Gas cubicle is sealed with a rated gas pressure of 1.35kg/cm² atmospheric at Applicable standard: 20°C for the breaker, disconnecting switch, busbar. It is suitable IEC 62271-200, IEC 62271-100, IEC 62271-102, IEC 60376 &... -
Page 5: Structural Details & General Arrangement
STRUCTURAL DETAILS & GENERAL ARRANGEMENT 3.0 STRUCTURAL DETAILS & GENERAL ARRANGEMENT 3.1 - Cubicle Structure The main circuit live section is divided into a busbar compart- ment in which the bus running through all the cubicles. A load- The substation facility comprises 3 compartments sealed with a side device compartment Consists of a vacuum circuit breaker. - Page 6 STRUCTURAL DETAILS & GENERAL ARRANGEMENT FINISH FLOOR LEVEL FRONT VIEW SECTIONAL VIEW OF OUTGOING-1 FEEDER PANEL PANEL NO.1 Figure 3.2.2 - Sectional View of Outgoing Feeder Panel LEGEND: END COVER 10. REAR COVER EARTH BAR TO CONNECT MAIN EARTH GRID AT SITE 11.
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Page 7: Sf6 Gas System
STRUCTURAL DETAILS & GENERAL ARRANGEMENT 3.3 - SF6 GAS SYSTEM The gas-tight compartments and the gas seals ensure long service life. A gas pressure monitor which is temperature compensated SF6 GAS provides accurate readings on the internal gas condition of the LIMIT S/W switchgear. - Page 8 STRUCTURAL DETAILS & GENERAL ARRANGEMENT panel may start dropping and may fall to 1.25 bar. In this case the operator needs to shutdown the panel and has to check it for leakage. Once the leakage is identi ed and is welded, air is 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.
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Page 9: Handling & Storage
HANDLING AND STORAGE 4.0 HANDLING AND STORAGE Never tilt the crates over as shown below. Non Compliance 4.1 - Precautions to be taken care with this stipulation may damage the equipment. Always 4.1.1 - Safety Aspects keep it upright. The Switchgear panels are designed for Indoor Application with all required safety features. -
Page 10: Transport And Handling
HANDLING AND STORAGE 2) When the equipment is hauled on manual lifting truck, be 4.3 - Transport and Handling sure that the pallet is of suf cient loading capacity. The following precautions should be taken in moving the Furthermore, do not lower the cubicle on its edge as this may unpacked GIS. -
Page 11: Storage
HANDLING AND STORAGE 4.4 - STORAGE The type of packing depends on the duration and nature of storage. The standard cubicle packing is meant for indoor storage where there is no possibility of condensation. If the equipment after being unpacked is to be left as it is or stored for some period of time until the installation commences or the equipment after having been installed is left idle, the cubicle should be covered to avoid contamination of dust on cubicle surface. - Page 12 HANDLING AND STORAGE 4.4.2 - Special Instruction for a storage period between 0 and 6 months Wrapped under plastic Film Packaging should be periodically inspected When the equipment is unpacked 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 the coil electrical operation should be tested 4.4.3 - Special Instruction for a storage between 6 and 12 months period...
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Page 13: Installation
INSTALLATION 5.0 INSTALLATION 5.1 - Checks Prior to Installation Check the order of cubicle arrangement, quantity and external dimensions of the cubicle and base frame according to the drawing provided (Refer gure 5.2 a). 5.2 - Foundation Work Hack out the oor cement surface out to a level of 50mm below 4 : M12 the oor level. - Page 14 INSTALLATION 1400 FRONT REAR PANEL 50 X 100 X 6 ISMC 75 X 125 X 6 EDGE ANGLE FIN.FL.LVL CEMENT FILLING FIN. FL. LVL FOR LEVELING WITH FINISHED FLOOR LEVEL FLOOR OPNG. FOR FLOOR OPNG. FOR POWER CABLE CONTROL CABLE SIDE VIEW 200 100 100 x 50 x 6 ISMC...
- Page 15 INSTALLATION HI: Height difference between the frames arranged in the 5.2.1 - Order of Arrangement cubicle width direction ..H1 = <0.5 mm 1) The unit of the foundation frame is for one to four cubicles. The frame can be combined for a larger housing. Any H2: Height difference between the left and right ends of one jointing of the framework must be done only after the frame.
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Page 16: Cubicle Installation
INSTALLATION 5.2.3 - Horizontal Deviations 5.2.4 - Foundation Frame Horizontal deviations of frames in the lateral and longitudinal After the foundation frame installation is completed, ll the directions should be within the range shown in gure 5.2.3. hollowed oor around the perimeter of the frame with cement as in gure 5.2.4. -
Page 17: Connecting Control Wiring
INSTALLATION Do s: 1. Floor levels are clean and ensure there should not be any hardware / small equipment s below the panels. 2. Check all the components received are in proper condition. 3. Please refer O&M Manual for oor leveling. Connection 4. -
Page 18: Connecting Power Cable
INSTALLATION made according to the connection diagram given. f) The Cable screen should be properly connected to the panel earthing. 2) For CT s in buscoupler panel inside tank CT secondary bushing connections are given in respective LV panel as Note: Connect only one end of the cable earth and not both. -
Page 19: Commissioning / Testing
COMMISSIONING 6.0 COMMISSIONING This section is a guide to the minimum checks and tests that 4) Energise the switchboard step-by-step, observing all signals should be performed on site prior to energising the equipment. and indicators. 5) Watch for any abnormalities. 6.1 - PRELIMINARY CHECKS Preliminary inspections should be carried out prior to the 6.4 - SWITCHING OPERATIONS... -
Page 20: Safety Interlocks In Gis Switchgears
COMMISSIONING handle on the front door panel to OFF or ON or remotely switch 1. VCB / Disconnector Switch the breaker. The status of the device can be checked with the Isolator can be operated only when VCB is in indicators located at the front door. - Page 21 COMMISSIONING 3. Trap the key in PE lock provided at BUS Copler panel and 4. CABLE ACCESS move DS of BUS Coupler to Earth postion. The opening of cable access cover is not possible unless the 4. Earth BUS-B by making DS Riser and breaker of BUS coupler cable have been connected to EARTH .
- Page 22 COMMISSIONING ELECTRICAL SWITCHING SEQUENCE FOR GIS INCOMING/ OUTGOING FEEDER PANEL Circuit Breaker Busbar disconnecting switch Earthing Switch (Q1 & Q2 incorporated in one 3 position switch) Note: The below operating sequence is standard operating sequence. If any key interlocks / key exchange are provided please refer key interlock arrangement provided by Design.
- Page 23 COMMISSIONING ELECTRICAL SWITCHING SEQUENCE FOR GIS INCOMING/ OUTGOING FEEDER PANEL Circuit Breaker Q1 / Q4 Busbar disconnecting switch Q2 / Q3 Earthing Switch (Q1 & Q2, Q3 & Q4 incorporated in one 3 position switch) Note: The below operating sequence is standard operating sequence. If any key interlocks / key exchange are provided please refer key interlock arrangement provided by Design.
- Page 24 COMMISSIONING ELECTRICAL SWITCHING SEQUENCE FOR GIS INCOMING/ OUTGOING FEEDER PANEL Circuit Breaker Q1 / Q4 Busbar disconnecting switch Q2 / Q3 Earthing Switch (Q1 & Q2, Q3 & Q4 incorporated in one 3 position switch) Note: The below operating sequence is standard operating sequence. If any key interlocks / key exchange are provided please refer key interlock arrangement provided by Design.
- Page 25 COMMISSIONING ELECTRICAL SWITCHING SEQUENCE FOR GIS INCOMING/ OUTGOING FEEDER PANEL Circuit Breaker Q1 / Q4 Busbar disconnecting switch Q2 / Q3 Earthing Switch (Q1 & Q2, Q3 & Q4 incorporated in one 3 position switch) Note: The below operating sequence is standard operating sequence. If any key interlocks / key exchange are provided please refer key interlock arrangement provided by Design.
- Page 26 COMMISSIONING Table 5: List of Inspection Items Routine Ordinary Detailed Servicing Interval Target Inspection item patrol inspection inspection equipment inspection Category Description Open - close indication: During lamp indication patrol Abnormal noise and During smell patrol Facility as Rust and damage of During Externals Cubicle...
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Page 27: Maintenance And Inspection
MAINTENANCE AND INSPECTION 7.0 MAINTENANCE AND INSPECTION GIS is designed to be maintenance-free, requiring only very 2) Periodically Inspection (Ordinary and Detailed) simple maintenance and inspection, lowering the running cost. This inspection is performed periodically at speci ed intervals to To keep the desired level of performance of the installed devices, keep the GIS and installed devices in good condition and at the enable early detection of faulty parts and thereby forestall... - Page 28 OPERATION AND MAINTENANCE MANUAL TYPE GIS DISCONNECTING SWITCH Introduction, Speci cations, Disconnecting Switch, Operating Mechanism, Interlock Features Maintenance & Inspection Criteria and Standard Accessories Operation & Maintenance Manual...
- Page 29 CONTENTS - 1 (GV3N), 2 (DS30), 3 (GV3N) Description Page Cl No INTRODUCTION SPECIFICATIONS STANDARDS & OPERATING CONDITIONS TECHNICAL DATA DISCONNECTING SWITCH EXTERNAL VIEW 3.1.1 FACIA OF DISCONNECTING SWITCH 3.1.2 POSITION OF SWITCH BLADES OPERATING MECHANISM 3.2.1 ELECTRICAL OPERATION 3.2.2 MANUAL OPERATION 3.2.3 EMERGENCY OPERATION...
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Page 30: Introduction
INTRODUCTION 1.0 INTRODUCTION This manual describes the handling and operation methods for the disconnecting switch installed in the gas-insulated switchgear panel. The disconnecting switch is dedicated 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. -
Page 31: Specifications
SPECIFICATIONS 2.0 SPECIFICATIONS 2.1 - Standards and Operating Conditions: Applicable standard: IEC 129. Operating conditions: Switch is mounted in type GV cubicle with minimum gas pressure of 1.2 bars absolute above atmosphere at 20°C. 2.2 - Technical Data: Electrical Characteristics 630A 1250A 2000A... -
Page 32: Disconnecting Switch
DISCONNECTING SWITCH 3.0 DISCONNECTING SWITCH 3.1 - External View xed contacts and the drive link are located inside a gas compartment. The disconnecting switch (DS) provided in the panel is of a 3-position type. The whole driving mechanism is accessible from The operation can be performed by both the motor spring drive (CLOSE/OPEN) or manual-spring drive (CLOSE/OPEN/ EARTH). -
Page 33: Position Of Switch Blades
DISCONNECTING SWITCH 3.1.2 - Position of the Switch Blades The moving contact consists of two coupled blades which can swing over to either sides to mate with the LOSE/EARTH contacts. The CLOSE contacts are mounted on independent resin cast insulators. The contacts are made of drawn copper conductors. -
Page 34: Operating Mechanism
DISCONNECTING SWITCH 3.2 - Operating Mechanism shaft, charging the closing spring. Towards the end of the operation, the closing spring will be released and this released The opening and closing of the disconnecting switch can be energy drives the mechanism to rotate at high speed. This electrically or manually operated. -
Page 35: Manual Operation
DISCONNECTING SWITCH 3.2.2 - Manual Operation handle. The shutter is spring loaded and will automatically close. A caution plate, as detailed below, is attached to the cover. The interlock plunger resets as soon as the handle is removed. Check the interlock before proceeding to operate. The number of rotation for the manual handle is about 17. -
Page 36: Standard Wiring Diagram
DISCONNECTING SWITCH 3.4 - Standard Wiring Diagram Operation & Maintenance Manual... -
Page 37: Maintenance & Inspection Criteria
MAINTENANCE & INSPECTION CRITERIA 4.0 MAINTENANCE & INSPECTION CRITERIA The Disconnecting Switches require little maintenance during 4.2 - Contents of Inspection their normal working life. The criteria shown below should Check points in visual, ordinary and detailed inspection are listed be observed to keep the disconnecting switch serviceable for a in table 4.1. -
Page 38: Check Points For Maintenance & Inspection
DISCONNECTING SWITCH 4.3 - Check Points for Maintenance & Inspection Inspection Category Check point Visual Ordinary Detailed Appearance (rust, dewpoint) Externals Gas pressure Open - close indicator Abnormal noise and smell Visual check Loose bolts and nuts Filings and chips, dislocated parts, foreign matters Deformation, damage, wear Movement of operating spring... -
Page 39: Standard Accessories
STANDARD ACCESSORIES 5.0 STANDARD ACCESSORIES 5.1 - Manual Operating Handle Figure 5.1 - Manual Operation Handle Operation & Maintenance Manual... - Page 40 OPERATION AND MAINTENANCE MANUAL TYPE GIS BREAKER GV3N Introduction, Speci cations, VCB, Maintenance and Standard Accessories Operation & Maintenance Manual...
- Page 41 CONTENTS - 1 (GV3N), 2 (DS30), 3 (GV3N-CB) Description Page Cl No INTRODUCTION SPECIFICATIONS STANDARDS & OPERATING CONDITIONS TECHNICAL DATA VACUUM CIRCUIT BREAKER POLE ASSEMBLY 3.1.1 CLOSING OF INTERRUPTER CONTACTS 3.1.2 OPENING OF INTERRUPTER CONTACTS VACUUM CIRCUIT BREAKER OPERATING MECHANISM 3.2.1 MOTOR CHARGING MECHANISM 3.2.2...
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Page 42: Introduction
INTRODUCTION 1.0 INTRODUCTION This manual describes the handling and operation methods for the vacuum circuit breaker types: GV3N-CB The vacuum circuit breaker is dedicated for installation in the GV3N cubicle type Gas insulated switchgear and its performance is guaranteed under the condition that a speci ed pressure of SF6 gas is maintained in the GIS. -
Page 43: Specifications
SPECIFICATIONS 2.0 SPECIFICATIONS 2.1 - Standards and Operating Conditions: Applicable standard: IEC 62271-200, IEC 62271-100, IEC 62271-102, IEC 60376 & IEC 60480. Mounted in type GV cubicles with a rated gas pressure of 1.35 bars absolute above atmospheric at 20 °C. 2.2 - Technical Data: Electrical Characteristics 630A... -
Page 44: Vacuum Circuit Breaker
VACUUM CIRCUIT BREAKER 3.0 VACUUM CIRCUIT BREAKER The type GV3N-CB are tested as per IEC. They have been 3.2 - Vacuum Circuit Breaker Operating Mechanism designed for reliability with minimal maintenance so that there is The mechanism is of the stored energy, motor wound or no need for access into the SF6 insulated chambers during the manually charged spring operated type. -
Page 45: Opening
VACUUM CIRCUIT BREAKER 3.2.4 - Opening 3.4 - Figures The circuit breaker can be opened by electrical trip or by the manual open pushbutton. The close / trip latch located behind Pressure Gauge the roller is displaced and the contact springs and opening Indication springs rotate the secondary shaft clockwise to fully open the circuit breaker and indicating Open . - Page 46 VACUUM CIRCUIT BREAKER 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 Operation Mechanism Operation & Maintenance Manual...
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Page 47: Standard Wiring Diagram
VACUUM CIRCUIT BREAKER 3.5 - Standard Wiring Diagram + VE + VE ON P/B ON P/B ON P/B R4 R4 R1 R1 A03 A04 A05 B02 B03 B04 B05 -- CONTROL CARD - VE - VE LEGEND DESCRIPTION LEGEND DESCRIPTION AUX. -
Page 48: Maintenance
MAINTENANCE 4.0 MAINTENANCE Type GV vacuum circuit breakers require little maintenance 4.1 - Inspection and Servicing Criteria. during their normal working life. The pole assembly including The inspection intervals should be reduced for equipment used the interrupter is considered maintenance free for the working in an adverse environment. -
Page 49: Standard Accessories
STANDARD ACCESSORIES 5.0 STANDARD ACCESSORIES 5.1 - Manual charging handle Operation & Maintenance Manual... -
Page 50: Mandatory Spares
MANDATORY SPARES 6.0 MANDATORY SPARES Mandatory Spares for 33KV GIS Spares Sl. No. Description Unit Quantity TRIP-NEUTRAL-CLOSE SELECTOR SWITCH FOR BREAKER OPEN-NEUTRAL-CLOSE SELECTOR SWITCH FOR INDOOR DS DOUBLE POLE MCB 16A PUSH BUTTON CONTROL FUSE RATED CURRENT : 10 AMP SEMAPHORE INDICATOR SHAPE : ROUND TYPE SEMAPHORE INDICATOR SHAPE : SQUARE TYPE CLOSING COIL... - Page 51 MANDATORY SPARES ANNEXURE-A Close all valves. Vacuuming Procedure: Plug the unit into a suitable power supply, (see nameplate for Make sure the vacuum compressor power switch is OFF. more information). Connect one end of equipment hose to the equipment being Make sure the equipment you will be evacuating does not charged.
- Page 52 MANDATORY SPARES the excess pressure to pass through the regulator into the HINT: To speed charging, keep the vessel you are drawing gas equipment. Then restart the GFU10. from warm. This applies to the onboard tank or external vessel. FINISH FLOOR LEVEL FRONT VIEW Figure -1 : Showing Arrangement of panels with SF6 gas inlet valve...
- Page 53 MANDATORY SPARES Figure 3.4.1 - GFU10-XDS Operator panel Mandatory Spares for GAS lling Spares Sl. No. Description Unit Quantity SF6 GAS pressure manometer Nos. SF6 GAS REFILLING&EVACUATING-MODEL GFU10 Nos. SF6 IR LEAK DETECTOR-MODEL - GIR-10 Nos. SF6 Gas Cylinder Nos. Filling adapter(Pipe) Nos.
- Page 54 NOTE Operation & Maintenance Manual...
- Page 55 NOTE Operation & Maintenance Manual...
- Page 56 Sales Of ces - India Sales Of ces - International Bengaluru Australia Oman L&T Area Of ce TAMCO Electrical Industries Australia Pty P.O. Box 598, Ruwi, Postal Code-112 No. 38, Cubbon Road Sultanate of Oman Bengaluru 56001 31 Kitchen Road, Dandenong 3175 Tel: +968 2476 2220 Tel: +080-25020328 Melbourne, Victoria, Australia...