Seg WI Series User Manual

11.2.3
Characteristics »I2>«
The following characteristics are available with the protection stage »I2>«:
• 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•
Explanation for All Characteristics (»I2>«)
• I2: Unbalanced load current•
• I> = I
2>
: Pickup value for the protection stage. If the pickup value is exceeded, the•
stage starts to time out to trip.
• Setting: [Protection Para / I2>] »I2«•
• Trip delay t for I2 > I
2>
:•
◦ for »Char« = “DEFT”: settable via [Protection Para / I2>] »t«.◦
◦ for all other characteristics: calculated based on the selected curve.◦
• Reset mode for I2 < I
2>
, 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«.
◦ With option »Reset Mode« = “inverse time” (only available for IEC and◦
ANSI/IEEE curves): The reset delay is calculated based on the selected
characteristics.
• tChar (for all characteristics except “DEFT”):•
308 WIC1 WIC1-1.0-EN-MAN
11 Appendix
11.2.3 Characteristics »I2>«

Seg WI Series Specifications

General

Brand	Seg
Model	WI Series
Category	Relays
Language	English