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REG 316*4 1MRB520049-Uen / Rev. E
5.13.4.3.
No active protection functions
If none of the protection functions is active (none programmed or
all blocked), the initialisation procedure is completed and no er-
rors were found, the device is not standing by. In this status, the
green LED on the LDU flashes and the green LED in the row of
LED's at the top left of the device lights continuously.
Fig. 5.83
5.13.4.4.
Normal operation
When the device is active and there are no errors or faults, the
green, yellow and red LED's are all off.
Fig. 5.84
5.13.4.5.
Pick-up of a protection function (General start)
The pick-up of at least one protection function (General start sig-
nal active) is indicated by the fact that the green and yellow
LED's light. The yellow LED remains lit after the general start
has reset and only extinguishes after it has been actively reset
(see Section
Fig. 5.85
5.13.4.6.
Protection function trip (General Trip)
The trip of at least one protection function (General Trip signal
active) is indicated by the fact that the green, yellow and red
LED's light. The yellow and red LED's remain lit after the general
green
yellow
LED statuses when none of the protection functions
is active
green
yellow
LED statuses in normal operation
5.13.8.6.).
green
yellow
LED statuses for a general start
ABB Switzerland Ltd
red
red
red
5-107
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