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7SG13 Delta P20064 FM1 Autoreclosing
2.1.5 In/Out Switching
The DAR feature may be switched out by changing the A/R In Service setting by a number of methods. These are
either a keypad change from the front panel, or via a communication, or by an A/R OUT status input. A/R OUT
status input has priority over A/R IN. If both are raised the function will be in Out Of Service. Once the relay has
been switched to Out Of Service the reverse action A/R IN is required before the function will go back to In
Service.
2.1.6 Overall Control
The DAR feature may be disabled by a Lockout command or by an external signal applied to a status input (A/R
OUT).
If the Lockout command or A/R OUT are received while a DAR operation is in progress, the feature is immediately
locked-out. An External A/R IN command can be received via a status input. This will re-enable the module.
If the Lockout command is received while a Manual Close operation is in progress, the feature is immediately
locked-out.
The DAR or Manual Close feature may be paused by an external Block signal applied to a status input. This
causes the feature to temporarily halt before it issues the next CB close command and can be used, for example,
to delay CB closure until the CB pressure has reached an acceptable level. If the Block signal has not been
removed before the end of a defined time, the Reclose Block Delay, the relay is locked-out.
A Block Reclose input active within the deadtime resets the deadtime timer.
2.1.7 CB Close Command pulse
The duration of the CB Close Command pulse is settable to allow a range of CBs to be used. The Close pulse will
be terminated if any protection Starter picks-up or a trip occurs. This is to prevent Close and Trip Command
pulses existing simultaneously. A Close Onto Fault Output is given if a starter or trip picks-up in the Close Pulse.
This can be independently wired to Lockout.
2.1.8 CB Failed To Open and CB Failed to Close
CB Failed To Open and CB Failed to Close features are used to confirm that a CB has not responded correctly to
each Trip and Close Command. If a CB fails to operate, the DAR feature can be set to lockout.
2.1.9 CB Closed by Another Device
If, during a dead time period, the Relay detects that the CB has closed (due to an external source) it increments
its Reclose count and advances to the next part of the Reclose sequence (begin Reclaim time).
2.1.10 Indications
The relay has a fully programmable output to either output contacts or LEDs, see settings sheet for complete list.
The following are included:
1. A/R Switched Out
2. A/R In Progress
3. Successful Close
4. Line Check
5. Ext Arc Start
6. Lockout
7. CB Failed to Open
8. CB Failed to Close
2.1.11 Trip and Reclose
This is a test function, allowing the operation of the CB to be verified.
The Trip signal should be routed directly to the Circuit Breaker. Once the CB has opened and the Trip and
Reclose input is removed the DAR will wait for the first Reclose Delay and then issue a CB Close command.
A Trip and Reclose command will only be accepted if the Relay is in quiescent, or line healthy mode, i.e. no
autoreclose sequences are in progress.
During the Trip and Reclose reclosure, Line Check is invoked to ensure that the CB does not repeatedly close
onto a faulty line.
©2010 Siemens Protection Devices Ltd.
P20064 Page 5 of 7
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