Rev.23
49/311
4.14. Function 50BF. Circuit Breaker opening fault
This function settings are as follows:
Function
Description
Minimum
Maximum
Step
Unit
Default
50BF
Circuit breaker opening fault
Permission
-
-
Yes/No
-
No
Opening fault time
0.02
1.00
0.01
s
0.2
The following automaton describes the open fault function:
When the “50BF Init” status is activated, a switch is made to the "50BF init" and time is counted. If,
following the adjusted open fault time, the switch is not detected to have open, the function trips. The
function is reset when the circuit breaker is detected to have opened, and the “50BF Init” status has
been reset.
To monitor the circuit breaker opening the current measurement via the three phases is used. When the
current via the three phases is less than 8% of the rated current, the circuit breaker is considered to be
open.
There is a “50BF init input” to start the open fault from an external protection.
The “50BF init” status is an adjustable logic output. The default configuration is shown below:
•
Opening fault input activation (50BF init input)
•
Circuit breaker opening from an HMI/local modbus
•
Circuit breaker opening from a remote modbus
•
Circuit breaker opening from remote communications
•
General trip
Run
Pickup
INIT_50BF = 1
Reset
t >
Imax< 8% Inominal
Imax< 8% Inominal
Imax< 8% Inominal
INIT_50BF = 0
50BF
Trip
50BF
50BF
Содержание SIL B
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Страница 15: ...www fanox com Rev 23 15 311 2 5 Terminals IEC 61850 or DNP3 0 protocols...
Страница 17: ...www fanox com Rev 23 17 311 IEC 60870 5 103 protocol...
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Страница 194: ...www fanox com Rev 23 194 311 Polarization V 35 0 V C Operating Angle 180 C Halfcone Angle 3 C...
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