IG-150-EN version 04; 03/10/16
57
General instructions
ekor.rps
Protection functions. Description and settings
4.2.3. Setting range of neutral time inhibition (6 tables)
Setting
Min
Max
Step
Notes
Limit current [A]
0.1
200.0
0.1
Table 4.5.
Setting range of neutral time inhibition
The neutral time inhibition setting allows the inhibition
of this characteristic from the moment the neutral
instantaneous characteristic picks up onwards.
The limit current is the one after which it stops following the
curve and it trips in the time the curve gives for this value,
that is, the curve turns into a horizontal line from this value.
If you do no want to use it, program the maximum value.
This setting is in the “TOC limitations” screen, under the title
“neutral TOC limitations”.
4.2.4. Settings ranges of the instantaneous characteristic (low level) (6 tables) (normal and HIGH2)
Setting
Min
Max
Step
Notes
Enable
YES/NO/pick up
Neutral instantaneous time [A]
0.010
20.000
0.001
With standard ratings
0.1
200.0
0.01
With specified ratings
Instantaneous additional time [s]
0.00
60.00
0.01
Special operation
See “instant. special operation”
Type of neutral (only in HIGH2)
Transformer/calculated
These settings can be found in the console on the screen “overcurrent protection (1)”. INSTANT NEUTRAL box.
Table 4.6.
Settings ranges of the instantaneous characteristic
The trip current is set in secondary amperes.
The remarks about functioning time are the same as the
ones quoted for phases.
4.2.5. Settings ranges of the instantaneous characteristic (high level) (6 tables) (normal and HIGH2)
Setting
Min
Max
Step
Notes
Enable
YES/NO/pick up
Neutral instantaneous trip [A]
0.010
20,000
0.001
With standard ratings
0.1
200.0
0.01
With specified ratings
Additional time [s]
0.00
60.00
0.01
These settings can be found in the console on the screen “instantaneous overcurrent protection. (HIGH1)”. INSTANT NEUTRAL box (HIGH).
Table 4.7.
Settings ranges of the instantaneous characteristic
The characteristics of times are the same as the ones
indicated for phases.
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