Operating Manual
46
Arc fault
protection ZŁ-4A; (07.2019)
„E5”
optical system test result is negative.
“ERROR” LED is not lighted.
A detection of an error is signalized by the central unit as well. The “ERROR” LED is
lighted, signaling relay contacts F8, F9 JC are closed. Detailed information about the error is
available on the page 6) ALARMS of the unit control panel.
11.5.
„Tripping” mode
In case when in a protected zone of the switchgear the fault arc has appeared, the pro-
tection ZŁ-4A will generate tripping signals to the circuit breakers, according to the estab-
lished regime. On the front panel of JP “TRIPPING” LED is lighted and information in which
protected zone the arc fault has been detected is displayed on the LCD display.
In case when a voltage drop or a voltage fall has appeared on the busbars of the switch-
gear, the information „UL” will be displayed. The messages are displayed cyclically by blink-
ing light (Fig. 24 and Fig. 25).
Fig. 24
Messages on the bay unit display („UL” – U< module active, activation after a detec-
tion of an arc fault in zone no. 2, information sent to JC).
Fig. 25 Messages on the bay unit display in case of a detection of an arc fault in zone 1
in another bay unit (JP has generated the tripping signal after receiving a message about the
arc fault from CAN).
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 ...
