Digital Spectrum MemoryFrame MF-801B Dokumentacja Pobierz pdf (Strona 22)

Earth Fault Protection Curves

M-PRO 30/40

A.20

Technical overview

A

GE Power Controls

Time to trip in seconds (s)

Current I (x In)

Earth fault cropping C

Trip Time = Time delay x C x If/I

Adjustment = 1, 1.5, 2, 2.5, 3, 4, 5 & 6

Note: 1 = OFF

Indicated: C = 1.5 and 6

Earth fault pick up If

Adjustment = 0.1 to 1.0 x In

in 0.01 x In steps

Time delay has 11 settings

Inst. to 1 s in steps of 0.1 s

Indicated: Inst., 0.1 s and 1 s

Pickup If set at 0.1 x In

Time delay set at inst.

Pickup If set at 0.1 x In

Time delay set at 0.1 s

Pickup If set at 1 x In

Cropping set at 6

Time delay set at 1 s

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 89 90

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