Seg WI Series User Manual

11.2.2
Characteristics (IG>, IG>>)
For each ground (earth) overcurrent stage the following characteristics are available:
• DEFT – De󰅰nite Time-Overcurrent•
• IEC 60255‑151 Curves:•
◦
NINV – IEC Normal Inverse (IEC 60255‑151)
◦
◦ VINV – IEC Very Inverse (IEC 60255‑151)◦
◦ LINV – IEC Long Time Inverse (IEC 60255‑151)◦
◦
EINV – IEC Extremely Inverse (IEC 60255‑151)
◦
• RINV – R Inverse•
• HV Fuse Fuse Characteristic of an HV Fuse•
• FR Fuse Fuse Characteristic of a Full Range Fuse•
• Curves De󰊟ned in IEEE C37.112:•
◦ MINV – IEEE Moderately Inverse (IEEE C37.112)◦
◦ VINV – IEEE Very Inverse (IEEE C37.112)◦
◦
EINV – IEEE Extremely Inverse (IEEE C37.112)
◦
• EF Curve “EF” Curve•
• RXIDG•
Explanation for All Characteristics (IG>, IG>>)
(Remark: All settings are given for protection stage »IG>«. »IG>>« has the same settings
with corresponding menu branches.)
• IG: Pickup value for the protection stage. If the pickup value is exceeded, the stage•
starts to time out to trip.
• IG> = I
G>
: If the pickup value is exceeded, the module/stage will be started.•
Setting: [Protection Para / IG>] »IG«
•
Trip delay t for IG > I
G>
:
•
◦ for »Char« = “DEFT”: settable via [Protection Para / IG>] »t«.◦
◦ for all other characteristics: calculated based on the selected curve.◦
• Reset mode for IG < I
G>
, settable via »Reset Mode«, available options:•
◦ With option »Reset Mode« = “instantaneous”: Instantaneous reset: when the◦
current drops below the pickup setting, the TOC time resets to zero within 2
cycles.
◦ With option »Reset Mode« = “de󰊟nite time”: The reset delay is settable◦
at »tReset«.
289WIC1WIC1-1.0-EN-MAN
11 Appendix
11.2.2 Characteristics (IG>, IG>>)

Seg WI Series Specifications

General

Brand	Seg
Model	WI Series
Category	Relays
Language	English