GE SecoGear User Manual

SecoGear 24kV-27kV Air Insulation Switchgear
24
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
• Check all the compartments and internal components for
dampness, rust and dirt.
• Check the tightening torques of the busbar bolted connections
on select
ed samples.
• Remove the pressure flaps on the busbar compartment and
remove the insulation shield (See fig 5/2). Check the torque is
86 N-m using a torque wrench.
Insulation
shield (for side
panel)
Insulation shield
(Middle panel)
Figure 5/2: Main busbar shield(Need to be replaced)
• Check the fixed contact including its profile for any sign of
sparking or wear-and-tear.
• Check the shutter mechanism i
n the circuit breaker
compartment.
• Check the interlocking between the circuit breaker and the
earthing switch.
• Check the bolted connection between the power cable
connectors and lugs.
• Check earthing switch operation.
• Check the interlocking between the earthing switch and the
cable compartment door.
• Check the interlocking between the circuit breaker and the
breaker compartment door.
• Check liv
e voltage indications.
• Check the heater (If installed).
Performance test
Performance test is to validate the electrical performance of the switchgear. It is recommended to be carried out together with the
scheduled service.
Performance test includes:
• Close and open the circuit break for five times, and check the circuit
• Check all the interlocking mechanism
• Electrical test including power frequency
withstand test, CT/VT ratio and the contact resistance for the circuit break
• Verify mechanical characteristics of the circuit break

GE SecoGear Specifications

General

Brand	GE
Model	SecoGear
Category	Switch
Language	English