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46
U n i G e a r Z S 1 I N S T A L L A T I O N , O P E R A T I O N A N D M A I N T E N A N C E
6.2 Test procedures
6.2.1 Testing the off-circuit condition
In switchgear panels which are not equipped
with capacitive voltage indication, checking
the off-circuit condition is carried out with a HV
tester on the isolating contacts in the isolating
tulips, after the corresponding upper shutter or
lower shutter has been opened.
If the panels are equipped with capacitive voltage
indication, checking the off-circuit condition can
be carried out by means of this device. In this case,
proceed according to the manufacturer's
instructions or the indicators (Optionally,
switchgear can be equipped with various types
of indicators coming from various manufacturers).
In case of any doubt about correct operation of
capacitive voltage indication, the off-circuit
condition must be checked using a HV tester.
Checking the off-circuit condition must always be
carried out in compliance with the relevant safety
regulations and local operating conditions!
—
Figure 71 View into the circuit-breaker compartment
6.2.2 Current and voltage tests
The testing and earthing module is available
for carrying out current and voltage tests. It is
also suitable for supplying primary current to
any current transformers which may be fitted
during measurements in the protection circuit
and, for example, for application of a test voltage
during insulating tests.
•
Isolate and secure the working area in
accordance with the IEC safety regulations
•
For primary current supply, fix the connecting
cable of the test transformer to the contact pins
•
For AC voltage tests, ball is required on the
contact pin. The bore in the ball is used for
connection of the voltage supply
•
For current tests, for example of small connected
generators, the short-circuit bridge must be
fixed onto the contact pins
Note:
With voltage tests at power frequency withstand
voltage and/or impulse voltage, carry out the
following procedure:
•
Disconnect any voltage transformers and
capacitive dividers and cover them with an
insulating plate
10.1
12.1
43.3
12.2
42
10.1
Control wiring socket
12.1
Top shutter
12.2
Lower shutter
14
14
Earthing switch operating mechanism
14.1
Drive shaft
14.1
42
Right travel rail
43.3
Duct cover, top right
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