Operating Manual
Arc fa
ult protection ZŁ-4A; (07.2019)
43
ZŁ-4A is permanently controlling the voltage on the protected switchgear busbars. In
case when the voltage will drop below the level set in the settings, the voltage module “U<”
will be activated. A respective detection is made in central unit, and a proper message is sent
to all the bay units through CAN bus.
A pulsing message “UL” is shown on the front panels of bay units (Fig. 22). The device
changes its mode into “single criterion” mode. In such a situation a light detecting results in a
tripping signal generation.
Fig. 22 Voltage drop message.
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 ...