GE SecoGear User Manual

SecoGear 24kV-27kV Air Insulation Switchgear
16
Operations and trouble shooting
Operations and trouble shooting
Before start up, the following work should be completed:
a. Check the overall condition of the switchgear and clear any
potential risk factor.
b. Check the switch，truck，isolated contactor and insulating
parts etc. by visual inspection.
c. Check the connection between earthing bus bar and
earthing conductor of the transformer substation out
side the
compartment is secure.
d. Remove all of the remaining materials, unnecessary objects
and tools inside of the compartment.
e. Wipe the compartment body and the insulation parts with
a soft cloth that should be clean and dry. Then wipe off any
remaining dust and grease.
f. Clean the surface of earthing busbar. The earthing loop
resistance should be less than 350 micro-ohms.
g. Re-install the cov
er removed during the period of installation,
wiring and commissioning.
Warning
a. Comply with all relevant safety regulations
b. Maintain circuit breakers in disconnection position
c. Remove earth wires and short wires of the hazardous areas
d. Pay attention to any abnormal situations
Use of hand tools
1) Gear door lock key
drawing no: 5GD.253.008
2) Rack handle for truck
drawing no: Y-002
FIG 20 : Hand Tools
h. Remove the shipping cap on the pole of the circuit breaker.
i. When
testing the power frequency withstand voltage of main
circuit, pay particular attention to sensors, cables and other
equipment during the test process.
Attention：
Read the product manual carefully when testing
the VT withstand voltage; use a test voltage of appropriate
frequency to avoid core saturation.
j. Place the Circuit Breaker on auxiliary control power.
k. Perform the operation test of the ci
rcuit breaker by manual or
electric control; observe the corresponding position indicator.
l. Check the interlocking validity, both mechanical and electrical.
m.Conductive paste can be applied on the circuit breaker
primary contacts.
3) Earthing switch operation handle
drawing no: 5GD.253.144

GE SecoGear Specifications

General

Brand	GE
Model	SecoGear
Category	Switch
Language	English