
Multi-Function Control ETMFC610
http://www.entecene.co.kr
210
EN
HANCED
TEC
HNOLOGY
8.2.5. Ground Instantaneous Overcurrent (50G)
The ETMFC610 has a ground instantaneous overcurrent element. This element in the ETMFC610,
is set based on CT secondary current as connected to the current inputs. This element provides a
definite time delay versus ground high fault current.
The operating time of this element should be set for equal to or faster than the ground time
overcurrent elements. This element is enabled in the ground setting and both PROTECTION
ENABLED and GROUND ENABLED in user interface panel.
This element is not affected by the inrush restrain and cold load pickup scheme.
50G Pickup Current
CURRENT INPUT
GROUND
Setting Value
-
+
50G1
LATCH
RST
FLTG
50G1T
FI RESET
TIME DELAY
G LAMP
EGPROT
GROUND
ENABLED
EPROT
PROTECTION
ENABLED
Figure 8-13. Ground Instantaneous Overcurrent(50G) Logic Diagram
‘INST OC - GND’ menu is sub-divided as follow;
Following settings are used to program the ‘INST OC –GND’ element.
1) (+) INST OC-GND Setup
GROUP # / PROTECTION / INST OC-GND / (+)INST OC-GND / Function
Range
ENABLE, DISABLE
Default
ENABLE
Step
~
Set the function of
(+) Ground Instantaneous Overcurrent
element
as enable or disable.
DISABLE:
(+) INST OC-GND
function on the ground does not
operate.
ENABLE:
(+) INST OC-GND
function on ground operates.
[(+)INST OC-GND]
>Function: ENABLE
>
Pickup: 4000
Time Delay: 0.00
[ENABLE,DISABLE]
[INST OC - GND]
>1.(+)INST OC-GND
2.(-)INST OC-GND
Содержание ETMFC610
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