ABB ZX0 - Testing for the in-phase condition; High voltage tests; Cable tests with dc

Manual ZX0 HB 600 en - Revision 05 | 65
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Do not exceed the maximum test voltages and the
maximum test duration as specified in
IEC60502-2.
Comply with the safety regulations to EN 50110.
− Isolate the switchgear section to be tested in accordance
with section 4.
− Test the switchgear section for the off-circuit condition as
described in section 5.1.
− Earth the switchgear section and secure the working area
in accordance with section 4 and EN 50110 standard.
− Switch the mcbs
1)
of the relevant operating mechanisms
off in order to prevent the switchgear section being ener-
gized by remote control.
Testing for the in-phase condition, e.g. when there is more than
one incoming feeder, can be performed with a suitable phase
comparator at the measuring sockets of the capacitive voltage
indication system.
The phase comparator must comply with IEC 61243-5 and corre-
spond to the technical design of the indicator system used.
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Observe the instruction manual for the phase
comparator.
5.2 Testing for the in-phase
condition
5.3 High voltage tests
Direct access to the conductors via the fitted cable connectors is
available for the performance of high voltage tests. The test volt-
age is applied through suitable test sets for the outer cone con-
nector system used.
5.3.1 Cable tests with dc
− Dismantle the cover on the relevant cable termination com-
partment.
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Isolate all voltage transformers inside the switch-
gear section to be tested by operating the
isolating device (see section 4.5).
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Dismantle any surge arresters in the relevant out-
going feeder in accordance with section 4.5.
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Short-circuit the sockets for the capacitive indica-
tor system in the relevant switchgear section using
the short-circuiting plug.
− Fit the high voltage testing set in accordance with the
manufacturer’s instructions.
− Establish the test circuit in accordance with the manufac-
turers directions for the test apparatus.
− De-earth the switchgear section to be tested before
switching the test voltage on.
− Perform the cable test in accordance with the
manufacturer´s directions for the test apparatus.
− Earth the switchgear section after completion of parts of
the test and on conclusion of testing.
− Remove the high voltage testing set.
− Refit any dismantled surge arresters.
− Close off free outer cones with insulating blanking plugs in
accordance with the manufacturers instructions.
− Remove the short-circuiting plugs from the capacitive indi-
cator.
− Reconnect the voltage transformers by operating the isolat-
ing device (see section 4.5).
− Refit the cover on the cable termination compartment.
1)
mcb: miniature circuit-breaker