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1.7
Distance protection (ZM)
Timer tPP=On
AND
STZMPP
Timer tPE=On
AND
STZMPE
BLKTR
STL1
STL2
STL3
Figure 28:
Tripping logic for the distance protection zone one
Input and output signals, zone 1-3
Table 69:
Input signals for the ZM1 (ZM1--), ZM2 (ZM2--), ZM3 (ZM3--) function blocks
Signal
BLOCK
BLKTR
VTSZ
STCND
Path in local HMI: ServiceReport/Functions/Impedance/Zonen/FuncOutputs
tPP
t
OR
tPE
t
AND
AND
AND
AND
Description
Blocks the operation of distance protection zone n
Blocks tripping outputs of distance protection zone n
Blocks the operation of distance protection zone n - connected to fuse
failure signal FUSE-VTSZ
External starting condition for the operation of the distance protection
zone n. Connected to one of the phase selection signals
PHS--STCNDI, PHS--STCNDZ or to the general fault criteria signal
GFC--STCND
Chapter 4
Line distance
15ms
TRIP
t
TRL1
TRL2
TRL3
en00000490.vsd
63
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