Seg WI Series - Earth (Ground) Overcurrent Protection; IG>, IG>> - Earth (Ground) Overcurrent Protection

4.5 IG>, IG>> – Earth (Ground) Overcurrent Protection
The Earth (Ground) Overcurrent modules »IG>«, »IG>>« can be set up as any of the
following protection functions:
• DEFT = IEEE C37.2 / ANSI 50N/G — De󰊟nite-Time ground (earth)•
overcurrent protection, non-directional (see also ╚═▷ “11.2.2.1 DEFT – De󰊟nite Time-
Overcurrent (IG>, IG>>)”).
◦ IEEE C37.2 / ANSI 50N is based on calculated ground (earth) current and always◦
available,
◦ IEEE C37.2 / ANSI 50G is based on measured ground (earth) current, and is◦
available for WIC1 variants with ground/earth measuring input. (See ╚═▷ “2.6.1
Order Form of the Device”.)
• IEEE C37.2 / ANSI 51N/G — Inverse-Time ground (earth) overcurrent protection, non-•
directional (characteristics see ╚═▷ “11.2.2 Characteristics (IG>, IG>>)”).
◦
IEEE C37.2 / ANSI 51N is based on calculated ground (earth) current and always
◦
available,
◦ IEEE C37.2 / ANSI 51G is based on measured ground (earth) current, and is◦
available for WIC1 variants with ground/earth measuring input. (See ╚═▷ “2.6.1
Order Form of the Device”.)
For general information about the concept of WIC1 protection functions, see ╚═▷
“4.1 »Prot« – General Protection Module”.
148 WIC1 WIC1-1.0-EN-MAN
4 Protective Elements
4.5 IG>, IG>> – Earth (Ground) Overcurrent Protection