Hitachi Relion 670 Series Applications Manual page 241

1MRK506375-UEN Rev. N
Table 29:
Value
1
2
3
4
5
6
7
tStartMove is the supervision time for the apparatus to start moving after a command execution is
done from the SCSWI function. When the time has expired, the command supervision is reset, and a
cause-code is given.
During the tIntermediate time, the position indication is allowed to be in an intermediate (00) state.
When the time has expired, the command supervision is reset, and a cause-code is given. The
indication of the mid-position at SCSWI is suppressed during this time period when the position
changes from open to close or vice-versa if the parameter SuppressMidPos is set to On in the
SCSWI function.
In most cases, the same value can be used for both tStartMove and tIntermediate as in the source
function. However, tStartMove may need to be increased to accommodate for the communication
delays, mainly when representing a circuit breaker.
12.3.9.5 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.
12.3.9.6 Reservation input (RESIN)
With the FutureUse parameter set to Bay future use the function can handle bays not yet installed in
the SA system.
12.4 Interlocking
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 earthing switches have a limited switching capacity. Disconnectors may therefore
only operate:
Railway application RER670
Application manual
Operating capability values for breaker/switches
Breaker operating capability, CbOpCap
None
Open
Close – Open
Open – Close – Open
Close – Open – Close – Open
Open – Close – Open – Close – Open
more
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Switch operating capability, SwOpCap
None
Open
Close
Close and Open
Larger values handled as 4, both Close and Open
Section 12
Control
M16677-3 v4
M16678-3 v4
IP15572-1 v2
M13530-4 v4
235