ABB Relion 670 Series RES670, Technical Manual

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16.4.7.7 Circuit breaker spring charge monitoring
The circuit breaker spring charge monitoring subfunction calculates the spring charging
time. The operation is described in
Figure 205 .
SPRCHRD
BLOCK
BLKALM
Spring charging
time
measurement
Alarm limit
Check
SPRCHRST
RSTSPCHT
SPCHT
SPCHALM
IEC12000621 V2 EN
Figure 205: Functional module diagram for circuit breaker spring charge indication
Spring charging time measurement
The binary input
SPRCHRST
indicates the pickup of circuit breaker spring charging time.
SPRCHRD
indicates that the circuit breaker spring is charged. The spring charging time is
calculated from the difference of these two signal timings. Spring charging indication is
described in Figure
205 .
The last measured spring charging time
SPCHT
is provided as a service value. The spring
charging time
SPCHT
can be reset on the LHMI or by activating the input
RSTSPCHT
.
Alarm limit check
If the time taken by the spring to charge is more than the value set with the SpChAlmTime
setting, the subfunction generates the
SPCHALM
alarm.
It is possible to block the
SPCHALM
alarm signal by activating the
BLKALM
binary input.
16.4.7.8 Circuit breaker gas pressure indication
The circuit breaker gas pressure indication subfunction monitors the gas pressure inside
the arc chamber. The operation is described in
Figure 206 .
1MRK 511 365-UUS A
Section 16
Monitoring
Phasor measurement unit RES670 2.1 ANSI 537
Technical manual