Operation Modes - Hitachi Relion 650 Series Technical Manual

Section 12
Monitoring
CRDACOPLx inputs within 200 ms after it has been received for any one CRDACOPLx input,
then oplog will be published from coordination information CRDACOPLx received for one or two
phases.
• For open operation with Power transformer and Coupled transformer load types, oplog will be
triggered after 1200 ms after receiving open command to ensure residual flux calculation is
completed.
The CB operation type (Close or Open) and the operation time stamp are integrated in the
OPLOGTRIG output signal for use by OPERLOG function.
12.19.6.2

Operation modes

Based on the feedback received from other functions, OPLOGTRIG generates a single operation
mode and provides the same on its OPLOGMODE output. The oplog modes generated by the
function are described in
number in the Order column is declared as Operation Log Mode.
Table 286: Operation modes
Order
1
2
3
4
5
6
7
Table continues on next page
318
Table 286. If multiple conditions are applicable, the mode with lowest
Mode Mode number
Invalid Flux 1671
Unreliable Flux 1672
External 1666
deenergization
without trip
cmd
External 1444
Operation
Cancelled 1446
Operation
Operation 1451
Blocked
Reference 1448
signal missing
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Description of conditions
• Calculated residual fluxes are outside their expected range.
• Invalid Flux is monitored using INVFLUX binary input.
• It is not possible to calculate a stable residual flux value due to
non-negligible transformer limb voltage after de-energization.
• Unreliable Flux is monitored using UNRELFLUX binary input.
• The load is deenergized by the operation of an upstream
breaker, that is, load current or load voltage was switched off,
but mechanical status is not changed for local circuit breaker.
• External deenergization without trip cmd is detected when
EXTDEENRG binary input is activated and external operation
is detected via co-ordination input CRDACOPLx.
• When a CB operation is detected to be initiated externally, that
is, the command is not issued from PWC600 but mechanical
and/or electrical circuit breaker status change has been
detected.
• External operation is detected via co-ordination input
CRDACOPLx.
• If there are time synchronizing issues, the PIO card may reject
to operate the output commands at the specified release times
and indicates this condition by Cancel signals. Please refer to
the section on Time synchronization.
• Cancel commands are monitored using the co-ordination input
CRDACOPLx.
• A controlled switching command was not executed due to
blocking conditions.
• Blocked operation command is monitored by co-ordination
input CRDACOPLx.
• When the command is received, the amplitude of the selected
reference signal is too low. (Reference for close operation is
always voltage and for open operations, this can be voltage or
current)
• Reference signal status is monitored using VOLREFOK,
CURREFOK, OPNREFI binary inputs.
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