![ABB Relion 630 Series Скачать руководство пользователя страница 212](http://html.mh-extra.com/html/abb/relion-630-series/relion-630-series_technical-manual_2813212.webp)
NCBDCSWI and LDMMXU for details regarding compensated
circuit breaker status calculation.
The compensated circuit breaker status has only two states, closed or open, as
confirmed.
7.2.3
Load-shedding trigger
PML630 performs load-shedding action in an electrical network area due to fast load-
shedding trigger, slow load-shedding trigger, external load-shedding trigger input or
manual load-shedding trigger. PML630 also performs load-shedding action in the
electrical network area if load-shedding is extended from an adjacent electrical
network area.
7.2.3.1
Fast load-shedding trigger
Fast load-shedding trigger due to power source, bus coupler or tie circuit breaker is
initiated in the conditions as shown in
Table 260:
Conditions for fast load-shedding trigger calculation
Fast load-shedding trigger due to power source
Fast load-shedding trigger due to bus coupler/tie
circuit breaker
•
Circuit breaker position from closed to open
•
Circuit breaker position from intermediate to
open
•
Lockout operation status
•
Circuit breaker position from close to open
•
Circuit breaker position from intermediate to
open
•
Lockout operation status
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 and NCBDCSWI for details regarding fast load-
shedding trigger calculation.
Fast load-shedding trigger can also be initiated by the external trigger input, if
configured, in the LSCACLS. In the cPMS load-shedding configuration B, the remote
-end circuit breaker disconnection also initiates fast load-shedding trigger.
The fast load-shedding trigger is inhibited (that is, blocked) in an individual source or
network circuit breaker by an external inhibition signal in PSCSWI and NCBDCSWI
respectively.
7.2.3.2
Slow load-shedding trigger
Slow load-shedding trigger due to power source is initiated in certain conditions.
Section 7
1MRS757256 F
Power management functions
206
PML630/Compact Load-Shedding Solution
Technical Manual
Содержание Relion 630 Series
Страница 1: ... RELION 630 SERIES Power Management PML630 Compact Load Shedding Solution Technical Manual ...
Страница 2: ......
Страница 26: ...20 ...
Страница 38: ...32 ...
Страница 202: ...196 ...
Страница 322: ...316 ...
Страница 360: ...354 ...
Страница 374: ...368 ...
Страница 376: ...370 ...