Woodward HighPROTEC - Page 974

Protective Elements
Release logic for the Generator Circuit Breaker
974 MCDGV4 DOK-HB-MCDGV4-2E
Ina ctive
Active
V Ext Release PCC
81U-Under (50,05 Hz)
81O-Over (47,5 Hz)
V Internal Release
V Ext Release PCC
Reclosure Release Cond
&
AND
&
AND
&
AND
>1
OR
&
AND
Decoupling1 Decoupling3 Decoupling2
ReclosureTrigger
Decoupling4 Decoupling5 Decoupling6
>1
OR
&
AND
f
2
V Ext Release PCC
Digital Input
0
Delay Timer
t-Release Blo
Inactive
Active
PCC Fuse Fail VT
&
AND
PCC Fuse Fail VT Digital Input
&
AND
VLL< Release
&
AND
VLL> Release
&
AND
VAB VBC VCA
&
AND
>1
OR
ReCon
Mains decoupling
Voltage Release Frequency Release
Mains settle timer (each High-Signal at the input will
restart die fall back delay timer)
V<
V> 81U-Under
81O-Over
Q->&V<.Decoupling Distributed Generator
DI.x
&
AND
ReCon.Release
ReCon.reconnected
1
Distributed Energy Resource already mains
parallel: true/false
Voltage Transformer Supervision
True RMS
Vavg*
Name.Criterion

Fundamental
&
AND
Both