ABB Relion 670 series - Page 371

ABB Relion 670 series

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en07000005_ansi.vsd

Imin > 0.10 IBase

Vcosj < 0.92 VBase

0.2 £ Slip.Freq. £ 8 Hz

AND

d ³ startAngle

AND

PICKUP

Z cross line ZA - ZC

Z cross line ZC - ZB

AND

AND

ZONE1

ZONE2

Counter

N1Limit

a

b

a ³ b

d £ tripAngle

AND

TRIP1

Counter

N2Limit

a

b

a ³ b

AND

TRIP2

OR

TRIP

ANSI07000005 V1 EN

Figure 194: Simplified logic diagram for pole slip protection PSPPPAM (78)

1MRK505222-UUS C Section 6

Impedance protection

365

Technical reference manual

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