Supervision Of Operating Apparatus; Synchro-Check - ABB REC 561 User Manual

1MRK 580 150-XEN
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2.8 Supervision of
operating apparatus

2.9 Synchro-check

Apparatus control
The control part should check the start conditions (for example, if there is
a select for open when the position is open) for a valid selection, the
movement itself, and correct completion. The corresponding status sig-
nals are given. The operation depends on the interlocking and blocking
signals.
The supervision of the command output is made by the microcontroller on
the output board.
A timer supervises the start of the drive. If the drive does not succeed in
starting within a specified time, the command sequence resets, and an
error indication is generated.
A timer supervises the movement of the drive. The maximum time can be
set between the start and until the new position is reached.
When three phase indications are included, the pole-discordance function
is included.
If blockings and interlocking allow operation, the drive can be operated
when the starting-point is in the intermediate position.
Synchro-check conditions can be considered when manually closing a
breaker. The closing command is released via the apparatus control, as for
ordinary operations with the synchro-check function excluded.
A timer supervises the synchro-check function. If there is no synchronism
within a specified time (after a closing command is given), there is a
failed synchronisation.
The REC 561 can use a built-in synchro-check function (also called inter-
nal synchro-check) or use an external synchro-check or synchronising
equipment, which are separate devices outside the REC 561. Two solu-
tions are supported. The explicit closing command can come from the
apparatus control itself (activated by the synchro-check) or from the exter-
nal synchro-check equipment (activated by the apparatus control).
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