Bay Reserve (Qcrsv); Reservation Input (Resin); Interlocking (3) - ABB REB670 Applications Manual
Busbar protection 2.1 ansi, relion 670 series
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Also See for REB670:
- Applications manual (554 pages) ,
- Commissioning manual (196 pages) ,
- Operator's manual (116 pages)
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1MRK 505 337-UUS -
12.3.3.4
12.3.3.5
12.4
Application manual
tClosePulse is the output pulse length for a close command. If AdaptivePulse is set to
Adaptive, it is the maximum length of the output pulse for an open command. The default
length is set to 200 ms for a circuit breaker (SXCBR) and 500 ms for a disconnector
(SXSWI).
Bay Reserve (QCRSV)
The timer tCancelRes defines the supervision time for canceling the reservation, when this
cannot be done by requesting bay due to for example communication failure.
When the parameter ParamRequestx (x=1-8) is set to Only own bay res. individually for
each apparatus (x) in the bay, only the own bay is reserved, that is, the output for
reservation request of other bays (RES_BAYS) will not be activated at selection of
apparatus x.
Reservation input (RESIN)
With the FutureUse parameter set to Bay future use the function can handle bays not yet
installed in the SA system.
Interlocking (3)
The main purpose of switchgear interlocking is:
•
To avoid the dangerous or damaging operation of switchgear
•
To enforce restrictions on the operation of the substation for other reasons for
example, load configuration. Examples of the latter are to limit the number of parallel
transformers to a maximum of two or to ensure that energizing is always from one
side, for example, the high voltage side of a transformer.
This section only deals with the first point, and only with restrictions caused by switching
devices other than the one to be controlled. This means that switch interlock, because of
device alarms, is not included in this section.
Disconnectors and grounding switches have a limited switching capacity. Disconnectors
may therefore only operate:
•
With basically zero current. The circuit is open on one side and has a small extension.
The capacitive current is small (for example, < 5A) and power transformers with
inrush current are not allowed.
•
To connect or disconnect a parallel circuit carrying load current. The switching
voltage across the open contacts is thus virtually zero, thanks to the parallel circuit
Section 12
Control
337
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