GE SecoGear User Manual
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GE SecoGear User Manual

24kv-27kv air insulation switchgear
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GE
Industrial Solutions
Gear
24kV-27kV
Air Insulation Switchgear
User Manual

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Summary of Contents for GE SecoGear

  • Page 1 Industrial Solutions Gear 24kV-27kV Air Insulation Switchgear User Manual...

  • Page 2: Table Of Contents

    Handling and Storage Installation of Switchgear Technical Specification Technical specification for SecoGear Table 1 Technical specification for SecoVac VB2 Plus (Circuit breaker) Table 2 Main circuit resistance of SecoVac VB2 plus Table 3 Technical specification for Earthing switch Table 4...
  • Page 3 Major Repairs and Examples Inspection and replacement of the main busbar Inspection and replacement of the fixed contact and spout bushing Inspection and replacement of the shutter mechanism Replacing the earthing switch Replacing the current transformer Inspection and replacement of the surge arrester Main Busbar Spare Parts Appendix A - Onsite Service Safety Instruction...
  • Page 4 If you have any further questions about this instruction manual, our field team will be pleased to provide the required information. GE Energy reserve all rights to this publication. We do not accept any responsibility for the information provided, which is subject to...

  • Page 5: General

    Standard and Specification • SecoGear complies with the standards and specifications for factory-assembled, metal enclosed and type tested high voltage switchgears to IEC publications as given below. IEC62271-100: 2008 …………… High-voltage alternating current circuit breakers.

  • Page 6: Operating Conditions

    • The intensity of earthquake should not exceed level 8 Special operating conditions Note on any special climatic operating conditions SecoGear is suitable for operation in the climate of indoor When the switchgear is operated in areas with high humidity type according to IEC 62271-200 standard. Special operating and/or major rapid temperature fluctuations, there is a risk conditions must be discussed with the manufacturer in advance.

  • Page 7: Handling And Storage

    Condition on delivery The transport units normally comprise of individual panels and, At the time of dispatch, the factory assembled SecoGear will in exceptional cases, small groups of panels. The panels are have withdrawable parts either securely locked in the service equipped with four (4) lifting eyebolts.
  • Page 8 SecoGear 24kV-27kV Air Insulation Switchgear Upon Receipt The responsibilities of the consignee when the switchgear arrives at the site include, but are not limited to, the following: Check the consignment is complete and without damage (e.g. look for any adverse effect caused by moisture). In case of doubt, the packing must be opened and then properly resealed with new drying agent bags (when intermediate storage is necessary).

  • Page 9: Installation Of Switchgear

    SecoGear 24kV-27kV Air Insulation Switchgear Installation of Switchgear Switch room cable duct arrangement (Side elevation) In order to obtain an optimum installation sequence and ensure high quality standards, site installation of the switchgear should 1800 1800 1700 1700 only be carried out by specially trained, or at least by supervised personnel and monitored by responsible persons.

  • Page 10: Technical Specification

    SecoGear 24kV-27kV Air Insulation Switchgear Technical Specification Technical specification for SecoGear -Table 1 Rated voltage Rated power frequency withstand voltage Rated lightning impulse withstand voltage Rated frequency 50/60 Rated current 1250/2500 Rated short time withstand current(3s) 31.5 Rated peak withstand current1) ≤...

  • Page 11: Technical Specification For Earthing Switch -Table 4

    Times 2000 Resistance to internal arc faults Arc release All three primary compartments of SecoGear switchgear are 31.5kA/1s provided with pressure relief flaps, which will automatically open and guide the pressurized gas to the rear side direction if an internal arc fault occurs in an affected compartment...
  • Page 12 SecoGear 24kV-27kV Air Insulation Switchgear Description of the interlock system Key Condition Key will be free when the truck in the disconnect position Functional truck racking-in lock Key will be trapped when the truck in the rack-in position Key will be free when the Earthing switch is open...

  • Page 13: Padlock (Optional)

    SecoGear 24kV-27kV Air Insulation Switchgear Padlock (Optional) Padlock for Circuit breaker racking-in/out operation Padlock for Circuit breaker racking-in/out operation will limit the access to insert crank lever to racking-in/out Circuit breaker. Racking- in/out operation can be done only when lock cover is in the open position.

  • Page 14: Enclosure Design And Equipment

    Enclosure design and equipment Typical modules (Figures 3/1) With withdrawable type SecoVac VB2 Plus Vacuum Circuit Breaker installed, SecoGear panels are used for incoming or outgoing feeder. Each unit consists of three high voltage compartments; Main bus bar, Circuit breaker, Cable compartment and one Low voltage compartment for instruments and auxiliary circuits.

  • Page 15: Switchgear Structure

    SecoGear 24kV-27kV Air Insulation Switchgear Switchgear structure 1. Pressure relief plate 2. Enclosure 3. Cover of main busbar compartment (can be removed) 4. Branch busbar 5. Main busbar 6. Primary disconnect spouse 7. Primary disconnect 8. Current transformer 9. Earthing switch 10.
  • Page 16 SecoGear 24kV-27kV Air Insulation Switchgear SCALE 1,000 SCALE 1,000 Figure 3/5: Busbar tie panel(1250/2500A) Figure 3/6: Riser panel(1250/2500A) JSZV17-15R JSZV17-15R Figure 3/7: Measuring panel(1250/2500A) Figure 3/8: VT Panel (2500A)
  • Page 17 SecoGear 24kV-27kV Air Insulation Switchgear Figure 3/9: Incoming with ES & VT panel (1250/2500A) Figure 3/10: Riser with ES panel (1250/2500) Figure 3/11: CPT panel (2500A) Figure 3/12: Typical dimensions and Weights of SecoGear (including withdrawable circuit-breaker parts) Dimension in Rated current...

  • Page 18: Cable Connections

    SecoGear 24kV-27kV Air Insulation Switchgear Cable Connections The cable compartment contains current transformers, voltage transformers (fixed or withdrawable), and earthing switch, depending on the individual operating requirements. The cable compartment is constructed for installation of three current transformers. When all the three current transformers are not required, dummies can be installed in their place to maintain the same installation and connection procedures.

  • Page 19: Operations And Trouble Shooting

    SecoGear 24kV-27kV Air Insulation Switchgear Operations and trouble shooting Operations and trouble shooting Before start up, the following work should be completed: Check the overall condition of the switchgear and clear any Remove the shipping cap on the pole of the circuit breaker.

  • Page 20: Rack Circuit Breaker Out From Service Position To Test / Disconnected Position

    SecoGear 24kV-27kV Air Insulation Switchgear Rack Circuit Breaker out from service position to test / disconnected position Move circuit breaker truck from transfer truck into the switchgear Check the fixed primary contact and apply an adequate Warning amount of conductive paste. Check the interlocking...

  • Page 21: Circuit Breaker

    SecoGear 24kV-27kV Air Insulation Switchgear Move the truck from disconnect / test position to service position Make sure the front and back door of the switchgear are Warning closed. Make sure the earthing switch is in the open position, the circuit breaker compartment is clear and without any...

  • Page 22: Interlocking Of The Switchgear

    SecoGear 24kV-27kV Air Insulation Switchgear Open the earthing switch Warning Make sure the cable compartment is clear and without any unexpected objects Make sure the cable compartment door is closed completely The earthing switch has been interlocked with the rear cover of cable compartment and can be opened only when the cover is closed.

  • Page 23: Debugging Of Combined Overcurrent Relay

    SecoGear 24kV-27kV Air Insulation Switchgear Interlock with Rear door Interlock with VCB undercarriage door Padlock cover for ES operation Fig 4/12 Earthing switch interlock with rear cover Fig 4/13 Breaker interlock with undercarriage SEQUENCE OF EARTHING SWITCH OPERATION Closing the earthing switch: Press the handle slide downwards;...

  • Page 24: Inspection And Maintenance

    Allow a GE representative to assist when the switchgear 5000 care and maintenance and its components need to be repaired. Users should think...

  • Page 25: Diagnosis And Trouble Shooting For Malfunction During Operations

    SecoGear 24kV-27kV Air Insulation Switchgear Diagnosis and trouble shooting for malfunction during operations Malfunction Reason Resolution 1. The handles on the withdrawable frame is not in position. 1. Adjust the frame and handles 2. The circuit breaker is closed 2. Open the circuit breaker The circuit breaker can not be racked into service 3.

  • Page 26: Service

    SecoGear 24kV-27kV Air Insulation Switchgear Routine inspection includes: The purpose for the service is to guarantee the operation quality • Check compartment doors are closed properly of the switchgear and avoid any possible malfunctions. This • Verify the control voltage, auxiliary voltage and battery increases the life of the switchgear.

  • Page 27: Repairs

    SecoGear 24kV-27kV Air Insulation Switchgear Repairs Immediate repairs are required in case of following situation emerges: • Deteriorated insulation, discharges, flashover and breakdown • Damaged component in the switchgear • Any other abnormal observation which may affect safety Inspection Items •...

  • Page 28: Major Repairs And Examples

    SecoGear 24kV-27kV Air Insulation Switchgear Major Repairs and examples Be sure to comply with the applicable safety • Remove the rear covers on the busbar compartment, as well regulations when carrying out repairs. as the same on the adjacent panels. Now the busbar is visible.

  • Page 29: Inspection And Replacement Of The Fixed Contact And Spout Bushing

    SecoGear 24kV-27kV Air Insulation Switchgear Inspection and replacement of the • Inspect the contacts. Replace the contact if the silver coating on copper is worn, or the surface is corroded, damaged or fixed contact and spout bushing over heated. •...

  • Page 30: Inspection And Replacement Of The Shutter Mechanism

    SecoGear 24kV-27kV Air Insulation Switchgear Recommend torque (N-m) Bolt size Without lubrication (oil) With lubrication (oil) • Tighten the bolt on the upper branch and main busbar. Ensure that applied torque is 86 N-m • Tighten the bolt of the lower branch busbar and the current transformer. Ensure applied torque is 86 N-m •...
  • Page 31 SecoGear 24kV-27kV Air Insulation Switchgear Both the screws can be accessed only when the Fixed screw of earthing switch is in OPEN position the bevel gear • Open the padlock on the operating hole of the earthing switch • Draw out the drive rod forward, then the parts of the drive rod in the switchgear can be removed from backwards now.

  • Page 32: Replacing The Current Transformer

    SecoGear 24kV-27kV Air Insulation Switchgear Replacing the current transformer Replace the current transformer if the assembled current • Support the mounting plate of the current transformer and transformer cannot meet the function due to a change in the then put on the ground load conditions.

  • Page 33: Inspection And Replacement Of The Surge Arrester

    SecoGear 24kV-27kV Air Insulation Switchgear Inspection and replacement of the Inspection and replacement of surge arrester potential indicator It is necessary to replace the surge arrester based on big If the display "Lock" on the potential indicator is flashing, and difference between reference voltage and the test data recorded...

  • Page 34: Main Busbar

    SecoGear 24kV-27kV Air Insulation Switchgear Main Busbar Rule and Note: Every 3~4 panels use one Main Busbar. The maximum length of Main Busbar should be less than 4m. Below is a table indicating Busbar sizing; Rated current Busbar type Cross section (copper)

  • Page 35: Spare Parts

    If it is necessary that personnel must service the switchgear, requirements, if isolation procedure between live equipment please make sure to contact GE or that site personnel is and test equipment is established, and there are clear properly trained and are capable of following proper safety instructions on the product labels.

  • Page 36: North America

    Vietnam Singapore 25th floor, CRC Tower, All Seasons Place, 87/2 Wireless Saigon Centre, Unit 1, Floor 7, Le Loi Boulevard, District 1 240 Tanjong Pagar Road, #06-00 GE Tower Road, Lumpini, Pathumwan, Bangkok 10330 HoChiMinh City Singapore 088540 T : +66 2 648 0240...

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