Seg WI Series User Manual

4.5.2.1 Earth (Ground) Overcurrent Protection – Settings via DiggiMEC or via Smart
view
The following settings are listed for the example of the »IG>« protection. For
the »IG>>« protection stage there are the same settings and features available.
⚙
1. ▷
Make sure all Field Parameters are set. In particular for ground (earth) overcurrent
protection, select between calculated or measured ground current. See ╚═▷ “4.2 Field
Parameters”.
2. ▷
Activate the protection stage and select whether it shall operate as a supervision or a
protection function, see ╚═▷ “4.1 »Prot« – General Protection Module”.
3. ▷
Select the »IG>« Earth (Ground) Overcurrent Characteristic:
• [Protection Para / IG>] »IG> . Char« =•
Options:
◦ “DEFT” (DEFinite-Time overcurrent),◦
◦ or any of the Inverse-time characteristics listed in ╚═▷ “11.2.2 Characteristics◦
(IG>, IG>>)”.
4. ▷
Specify the »IG>« Earth (Ground) Overcurrent pickup threshold (as a number value in
units of the nominal current In):
• [Protection Para / IG>] »IG> . IG«•
5. ▷
Only in case of De󰊟nite-Time overcurrent »IG> . Char« = “DEFT”:
Specify the »IG>« Earth (Ground) Overcurrent tripping delay (in seconds):
• [Protection Para / IG>] »IG> . t«•
6. ▷
Select the »IG>« Earth (Ground) Overcurrent Reset Mode, that controls the reset delay:
• [Protection Para / IG>] »IG> . Reset Mode« =•
Options:
◦ “instantaneous” (immediate reset),◦
◦ “de󰊟nite time” (reset delay 󰊟xed to a particular time in seconds),◦
◦ “inverse time” (reset delay depends on the selected characteristic. This◦
option is not available for some curves, see ╚═▷ “11.2.2 Characteristics (IG>,
IG>>)”.)
7. ▷
Only in case of an Inverse-Time characteristic with 󰊟xed reset delay, »IG> . Char« =
“de󰊟nite time”:
Specify the »IG>« Earth (Ground) Overcurrent reset delay (in seconds):
• [Protection Para / IG>] »IG> . tReset«•
(Remark: For the De󰊟nite-Time overcurrent, the reset delay always equals 0.)
8. ▷
Only in case of an Inverse-Time characteristic:
Specify the »IG>« Earth (Ground) Overcurrent minimum trip delay (in seconds, see
╚═▷ “Explanation for All Characteristics (IG>, IG>>)” for details):
• [Protection Para / IG>] »IG> . tMin«•
151WIC1WIC1-1.0-EN-MAN
4 Protective Elements
4.5.2.1 Earth (Ground) Overcurrent Protection – Settings via DiggiMEC or via Smart view

Seg WI Series Specifications

General

Brand	Seg
Model	WI Series
Category	Relays
Language	English