Name Type Description
PU_A BOOLEAN Pickup signal from phase A
PU_B BOOLEAN Pickup signal from phase B
PU_C BOOLEAN Pickup signal from phase C
PHPUND BOOLEAN Non-directional pickup, issued from any selected
phase or loop
Table 95: ZMQAPDIS (21) Input signals
Name Type Default Description
I3P GROUP
SIGNAL
- Group signal for current input
V3P GROUP
SIGNAL
- Group signal for voltage input
BLOCK BOOLEAN 0 Block of function
LOVBZ BOOLEAN 0 Blocks all output for LOV (or fuse failure) condition
BLKTR BOOLEAN 0 Blocks all trip outputs
PHSEL INTEGER 0 Faulted phase loop selection enable from phase
selector
DIRCND INTEGER 0 External directional condition
Table 96: ZMQAPDIS (21) Output signals
Name
Type Description
TRIP BOOLEAN General Trip, issued from any phase or loop
TR_A BOOLEAN Trip signal from phase A
TR_B BOOLEAN Trip signal from phase B
TR_C BOOLEAN Trip signal from phase C
PICKUP BOOLEAN General Pickup, issued from any phase or loop
PU_A BOOLEAN Pickup signal from phase A
PU_B BOOLEAN Pickup signal from phase B
PU_C BOOLEAN Pickup signal from phase C
PHPUND BOOLEAN Non-directional pickup, issued from any selected
phase or loop
Table 97: ZDRDIR (21D) Input signals
Name
Type Default Description
I3P GROUP
SIGNAL
- group connection for current abs 2
V3P GROUP
SIGNAL
- group connection for voltage abs 2
1MRK505222-UUS C Section 6
Impedance protection
191
Technical reference manual
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