Calculating Setting For Switch Into Fault Logic Voltage And Current Based Zcvpsof - ABB REL650 Applications Manual

1MRK 506 334-UUS A
3.1.8
Application manual
• For an internal fault zone 2 in line end B will pick up and send a signal to line end A
(CS).
• If zone 4 (reverse) or none of the forward zones in line end A does not pick up the
received signal from line end B (CR) will be sent back (echo).
• If the voltage in line end A is low and the distance protection zones do not pick up the
circuit breaker is tripped (if this feature is set).
• In line end B the echo signal is received (CR) and the communication scheme will
give an undelayed trip to the circuit breaker.
The function at external fault can be described as:
• For an external fault zone 2 in line end B will pick up and send a signal to line end A
(CS).
• Zone 4 (reverse) in line end A will pick up and prevent the received signal to be sent
back to line end B.
• None of the line ends will be tripped.
1. Set WEI to Echo & Trip
Echoes the CR signal as well as, trip locally.
2. Set tPickUpWEI to 0.01 s
The shortest duration of the CR signal.
3. Set PU27PP to 70%
Should be set lower than the lowest possible phase-to-phase voltage at non-faulted
operation. The setting is done in % of rated phase-to-phase voltage. Default setting
is 70%.
4. Set PU27PN to 70%
Should be set lower than the lowest possible phase-to-ground voltage at non-faulted
operation. The setting is done in % of rated phase-to-ground voltage. Default setting
is 70%.
Calculating setting for switch into fault logic voltage and current
based ZCVPSOF
The settings are made in primary values. These values are given in the base settings in
Global base 1.
1. Set GlobalBaseSel to 1
2. Set Mode to VILvl&Imp
3. Set AutoInit to Enabled
No BC signal available
4. Set IphPickup to 20 % of IBase
Section 3
REL650 setting examples
65