Table. 5.4.5 - 191. Setting parameters for operating time characteristics.
Name
Range
Step
Default
Description
T
set
0.000…1800.000s 0.005s 10.000s
The function's start timer which defines how long the
I
low
condition has to
last before the cold load pick-up is activated.
T
max
0.000…1800.000s 0.005s 30.000s
The function's maximum timer which defines how long the starting
condition can last and for how long the current is allowed to be over
I
high
.
T
min
0.000…1800.000s 0.005s 0.040s
The function's minimum timer which defines how long the starting condition
has to last at the minimum. If the start-up sequence includes more than
one inrush situation, this parameter may be used to prolong the cold load
pick-up time over the first inrush. Additionally, this parameter operates as
the "reclaim" time for the function in case the inrush current is not
immediately initiated in the start-up sequence.
The six examples below showcase some typical cases with the cold load pick-up function.
Figure. 5.4.5 - 196. Example of timers and pick-up parameters (normal CLPU situation).
In the example above, the cold load pick-up function activates after the measured current dips below
the
I
low
setting and has been there for
T
set
amount of time. When the current exceeds the
I
high
setting
value, a timer starts counting towards the
T
max
time. The pick-up current is cleared before the the
counter reaches the
T
max
time, when the measured current goes between of
I
low
and the
I
high
. This is
when the start-up condition is considered to be over. The cold load pick-up signal can be prolonged
beyond this time by setting the
T
min
to a value higher than 0.000 s.
A
AQ
Q-F205
-F205
Instruction manual
Version: 2.04
290
© Arcteq Relays Ltd
IM00013
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