94 ZX2 GAS-INSULATED MEDIUM VOLTAGE SWITCHGEAR
Test sequence
• Connect the test transformer to the test plug or
test cable and ground the other two phases of
the main circuit.
• Connect the second terminal of the test
transformer to system ground.
• Connect other sections of the switchgear to be
tested by operating the relevant disconnects
and circuit-breakers.
• Cancel the grounding of the system section to
be tested before applying the test voltage.
• Perform the high voltage test.
• Ground the system section on completion of
individual tests and on conclusion of testing.
• Dismantle the test cables or test plugs.
• Fit any surge arresters and voltage
transformers required.
• Close off any free test sockets and cable
sockets with blanking plugs.
• Close off free outer cones with insulating
blanking plugs in accordance with the
manufacturer’s instructions.
• Cancel any isolation of voltage transformers in
metering panels.
• Remove the short-circuiting plugs from the
capacitive indicator.
• Refit the cover on the cable termination
compartment.
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