ABB ZS1 Instruction Manual page 50

dividers installed in the panels are correspondingly
of different ratings, and the measuring sockets and
indicators units are of different types.
Note:
The only permissible indicators are those which
satisfy the requirements of the IEC and VDE
standards and correspond to the technical design
of the indication system in the relevant switchgear !
The measuring sockets must on no account be
short-circuited, except for voltage tests on the
switchgear (e.g. at power frequency withstand
voltage and/or impulse voltage).
Testing for the off-circuit condition is effected using
a plug-in indicator at the corresponding socket
pairs located among the controls on the panels.
Use of the indicator unit:
• Carry out a functional test on the unit
immediately before use, e.g. with interface tester
KSP. The display must be clearly perceptible.
• The presence of operating voltage is displayed
by a signal.
• Always follow the details given in the instructions
for the particular indicator unit for your
switchgear system.
Interface testing:
• Perform an interface test as a functional test on
all coupling components, e.g. with interface
tester KSP.
• The interface test is a repeat test as specified in
IEC 61243-5 and VDE 0682 Part 415.
6.3.2 Testing for in-phase condition
Testing for the in-phase condition, e.g. when there
is more than one incoming feeder, can be carried
out with a suitable phase comparator coupled to
the measuring sockets of the capacitive voltage
indication system (if fitted).
Test procedure:
• Only use phase comparators which comply with
the IEC and VDE standards and are of suitable
ABB Power Distribution
design for the indication system in the relevant
switchgear.
• Check the function of the unit immediately prior
to use.
• Ensure that the maximum permissible length of
the measuring cables for each phase is not
exceeded.
• Connect the measuring cables to precisely the
corresponding main conductor sections.
• Follow the directions for the phase comparator in
detail!
6.3.3 Current and voltage testings
(Figures 6/4 and 6/20)
Testing and earthing module 142 is available for the
performance of current and voltage tests. It is
equally suitable for primary current injection to any
current transformers which may be fitted during
measurements in the protection circuit and, for
example, for the application of a test voltage during
insulating testing.
• Isolate and secure the working area in
accordance with the safety regulations of DIN
VDE/IEC.
• For primary current feed, fasten the connecting
cable of the test transformer to the contact pins
142.7.
• For AC voltage tests, ball 142.4 on the contact
pin is required. The bore in the ball serves for
connection of the voltage supply.
• For current tests, for example of small connected
generators, the short-circuit bridge 142.8 is to be
fastened onto the contact pins.
Note:
With voltage tests at power frequency withstand
voltage and/or impulse voltage, observe the
following:
• Short-circuit the measuring sockets 30 in the re-
levant panels for the duration of the test
procedure (only)!
• Disconnect any voltage transformers and cover
with an insulating plate.
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