
Multi-Function Control ETMFC610
http://www.entecene.co.kr
217
EN
HANCED
TEC
HNOLOGY
After it’s done black out more than outage time, it restores load current supply, inrush current
restraint algorithm is applied. When the restoration of load supply is occurred, in the case of that
generated inrush current is greater than inrush duration fault pickup current as inrush current 1 of
“Figure 8-16. Inrush Restraint Operation Characteristics”
, it’s considered as fault current, CB
does trip operation during inrush duration. (But, when the delay curve of time overcurrent element
is ENABL, CB does operation). When inrush current is less than inrush duration fault pickup
current
as inrush current 2 of
“Figure 8-16. Inrush Restraint Operation Characteristics”
After
fault protection operation is suppressed during R.M.T Time(Restore Minimum Time), CB does trip
operation after inrush duration.
However, inrush duration is removed if inrush current is less than reset current before R.M.T Time
(Restore Minimum Time) as inrush current 3 of
“Figure 8-16. Inrush Restraint Operation
Characteristics”
.
NOTE:
According to setting of “Make use ‘I’”, in order to activate inrush current restraint the
condition to decide the restoration of load supply will be changed. If “YES” is set, the
decision is made when the load current becomes over 2A. If “NO” is set, the decision is made
when a CB is closed (52A) by local or remote control.
8.2.8.1. Inrush Restraint Setup
‘INRUSH RESTRAINT’ menu is sub-divided as follow;
[INRUSH RESTRAINT]
>1.FUNCTION
2.PICKUP CURRENT
3.RESTORE MIN. TIME
4.INRUSH RES’ RESET
5.PHASE CURVE
6.GROUND CURVE
7.NEG SEQ’ CURVE
8.OTHERS
Содержание ETMFC610
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