Trip and close operations can be triggered:
Automatically by the CMR as part of a protection sequence.
Using the yellow handle.
o Optically Ganged installations: Pulling any yellow handle down will trip all phases.
Putting the last yellow handle back up will close all phases. No close operations (from
any source) will occur while any yellow handle is down.
o Independent Pole installations: Pulling a yellow handle down will trip that phase.
Putting the yellow handle up will close that phase. No close operations (from any
source) will occur while the yellow handle is down.
o Pulling a yellow handle down will mechanically trip the CMR is unpowered.
o A CMR is mechanically prevented from closing while its yellow handle is down.
Using the CMRConnect utility on a PC equipped with a USB antenna module.
SCADA operator via the RCU
Operator control panel if fitted to the RCU
The CMR applies a number of rules (based on its state and configuration) to decide whether a trip
or close operation should be performed
o Trip & close operations are blocked if
o optical communication between devices has failed (for an optically ganged installation
only)
o all relevant phases are already in the target position.
For ganged operations, only phases that are not already in the target position
will operate (assuming the operation is not blocked by some other rule)
o the CMR has a pending (delayed) close operation.
o Protection/Zone Sequence Coordination/Sectionalizer trips are blocked if
o any yellow handle is down.
o Trip operations from the RCU (includes SCADA, Panel, RCUProbe) are blocked if
o the red handle is down, and user has configured the CMR to block RCU sourced trips
when the red handle is down.
o Manual close operations (i.e. from yellow handle) are blocked if
o the red handle is down, and the user has configured the CMR to block user close
operations.
o the recloser is not idle (i.e., is not Open and Locked out, is in a protection sequence)
o the active protection group is configured to not allow close operations
o Close operations from the RCU (includes SCADA, Panel, RCUProbe) are blocked if
o the red handle is down, and the user has configured the CMR to block all close
operations
o the red handle is down, and the user has configured the CMR to block RCU sourced
close operations
o the recloser is not idle (i.e., is not Open and Locked out, is in a protection sequence)
o the active protection group is configured to not allow close operations
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