ABB Relion 630 Series, Technical Manual

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Table 258: Power flow sign convention for power source
Power flow sign convention in
power source CB IED
Power flow sign convention in
PML630 IED
Power convention setting
Power source
circuit breaker
Busbar
GUID-337D9722-FF8B-43F6-A154-C0BC2E59597E V1 EN
Bus bar
GUID-B856A532-5035-4E43-8BE5-504CA9B0A0E3 V1 EN
Positive XX
Bus bar
GUID-41BA4C68-2641-4D66-9655-D89D57D949E6 V1 EN
Bus bar
GUID-B856A532-5035-4E43-8BE5-504CA9B0A0E3 V1 EN
Negative XX
The power source circuit breaker IED power unit in PML630 can be
converted to kW based on the
Power convention setting. In Table 258 ,
“Positive XX” means “Positive W”, “Positive kW” or “Positive
MW”. See PSCSWI for details regarding the power unit conversion.
7.2.2 Compensated circuit breaker status
The compensated circuit breaker status is calculated for the power source, network
circuit breaker and sheddable load for the load-shedding functionality. The
compensated circuit breaker status is calculated by considering the respective circuit
breaker position, IED data quality, circuit breaker in service/test and lockout
protection operation as shown in
Table 259 .
Table 259: Conditions for compensated circuit breaker status calculation
Compensated CB status for
power source
Compensated CB status for bus
coupler/tie circuit breaker
Compensated CB status for load
feeder
• Circuit breaker position
• Circuit breaker in service/
test
• IED data quality
• Lockout operation status
• Circuit breaker position
• Circuit breaker in service/
test
• IED data quality
• Lockout operation status
• Circuit breaker position
• IED data quality
Depending on the network circuit breaker configuration as bus
coupler/tie circuit breaker, the compensated circuit breaker status is
calculated for the network circuit breaker. See PSCSWI,
1MRS757256 F
Section 7
Power management functions
PML630/Compact Load-Shedding Solution 205
Technical Manual