Circuit Breaker Gas Pressure Indication - ABB RES670 Technical Manual

Relion 670 series, phasor measurement unit

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1MRK 511 408-UUS A

Phasor measurement unit RES670 2.2 ANSI

Technical manual

IEC12000621 V2 EN-US

Functional module diagram for circuit breaker spring charge indication

Spring charging time measurement

Spring charging time calculation will be initiated as soon as the circuit breaker is

closed and charging motor starts (NO contact of the device is connected to SPRCHRST)

to store the energy in the close spring. An indicator provided in the circuit breaker is

displayed when the spring is completely charged. This status is taken through NO

contact and then connected to SPRCHRD.

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 216.

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

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

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 217.

Spring charging

GUID-9D070D52-B499-4D45-9195-60181819184E v10

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