Operating Manual
Arc fa
ult protection ZŁ-4A; (07.2019)
95
M5 Block of registers
There are 16-bit registers with the write-only attribute [W] (base address: 10000) available.
offset Register name
Description
0
TaskRegister
Launching an optical detector test
Rejestr: TaskRegister
bit
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
OT
Bit number
Mnemonics
Description
1..7
-
Reserved
0
OT
Optical detector test (setting
„1” – test start of all detectors)
15. Operating
15.1. Periodic check of the protection operation
During a properly managed operation of the arc fault protection systems the check-up of
the operation of the protection should be carried out during the periodic inspections of the
switchgears or during their out-of-service time. The check-up should cover the control of:
activation of optic detectors,
activation of voltage elements,
external and internal signaling circuits,
activation of all tripping circuits by simulating an arc fault.
At least once a year, apart from the functional check, the operate time of the protection
should be checked.
The producer provides services, repairs and periodic tests of the arc fault protection sys-
tems.
15.2. Exchange of optic elements after an arc fault appearance
After an arc fault appearance the optical detectors of the arc fault protection are usually
not to be used anymore, even if they do not appear damaged. As a result of the arc acting
the sensitivity of the optical detectors may be changed (due to smoke or temperature influ-
ence) and simultaneously the sensitivity of the whole protection is modified. Exchange of the
optical detectors should be managed according to the manuals of the optical detectors.
Summary of Contents for ZL-4A
Page 24: ...Operating Manual 24 Arc fault protection ZŁ 4A 07 2019 Fig 5 ZŁ 4A JC dimensions ...
Page 25: ...Operating Manual Arc fault protection ZŁ 4A 07 2019 25 Fig 6 ZŁ 4A JP dimensions ...
Page 26: ...Operating Manual 26 Arc fault protection ZŁ 4A 07 2019 Fig 7 ZŁ 4A JW dimensions ...
Page 61: ...Operating Manual Arc fault protection ZŁ 4A 07 2019 61 Fig 36 Page 2 STATUS using ...