Functionality; Function Block; Signals - ABB REL650 Technical Manual

1MRK 506 382-UEN A
6.3.2
6.3.3
6.3.4
Line distance protection REL650 2.2 IEC
Technical manual

Functionality

Automatic switch onto fault logic ZCVPSOF is a function that gives an
instantaneous trip when closing the breaker onto a fault. A dead-line detection
check is provided to activate ZCVPSOF when the line is de-energized.
Mho distance protections cannot operate for switch onto fault conditions when the
phase voltages are close to zero. An additional logic based on UI Level is used for
this purpose.
ZCVPSOF is a complementary function to the distance protection function. It is
enabled for operation either by the closing command to the circuit breaker
(normally closed auxiliary contact of the circuit breaker) to the BC input or
automatically by the dead-line detection. Once enabled, it remains active for tSOTF
duration after the enabling signal is reset. The protection function can be enabled
for tripping during the activated time by connecting the functions included in the
terminal to the ZACC input. Therefore, the start of the selected protection functions
connected to ZACC during the enabled condition results in an immediate TRIP
output from the function.

Function block

IEC06000459 V3 EN-US
Figure 58: ZCVPSOF function block

Signals

Table 44: ZCVPSOF Input signals
Name Type
I3P GROUP
SIGNAL
U3P GROUP
SIGNAL
BLOCK BOOLEAN
START_DLYD BOOLEAN
BC BOOLEAN
ZACC BOOLEAN
Impedance protection
Default Description
- Current DFT
- Voltage DFT
0 Block of function
0 Start from function to be accelerated with delay
by SOTF
0 External enabling of SOTF
0 Distance zone to be accelerated by SOTF
Section 6
SEMOD153644-5 v9
SEMOD156265-4 v6
SEMOD156281-1 v2
PID-3875-INPUTSIGNALS v10
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