ABB UniSec DY800, Инструкции по установке, обслуживанию и техническому обслуживанию

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UNISEC DY800 - E D. 4 - ACCORDING TO E- DISTRIBUZIONE SPECIFIC ATIONS
- INS TA LL ATI ON M A NUA L
The maximum voltage applicable in the point in
which the cables connect to the switchgear for the
insulation test or for locating faults in the cables, is
50 kV DC.
The tests must be performed with the door closed,
by routing the cables from the front shutter on the
door.
Check compliance with the safety distances from
live parts, taking into account the value of the test
voltage applied.
—
9. Cable tests
• Before proceeding, ensure that the part of the
installation in which the work must be performed is in
a safe condition
• Connection of cables for test purposes (applied
voltage and troubleshooting) alters the characteristics
of the switchgear. Those who do this must ensure
compliance with the correct procedures in order to
guarantee safe conditions for the workers
• Obligatory conditions when performing voltage tests
on the cables or troubleshooting:
– earthing switch ST must be open
– feeder disconnector SL must be open
(isolated position)
– the circuit-breaker must be open
NOTE
The isolating distance is not guaranteed with
feeder disconnector SL in the closed position and
the circuit-breaker open
Cable
connection
Front
access