Eaton EDR 3000, Инструкция по установке, эксплуатации и обслуживанию

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EDR-3000 IM02602003E
Supervision Schemes
Up to three supervision schemes are available depending on the ordered device type and variant in order to detect a
Breaker Failure.
50BF*
A supervision timer will be started as soon as the
BF-module is triggered by a trip signal. A Breaker Failure will be de-
tected and a signal will be issued if the measured current does not fall below a set threshold while this timer runs down.
This supervision scheme is available within protective relays that offer current measurement.
CB Pos
A supervision timer will be started as soon as the
BF module is triggered by a trip signal. A Breaker Failure will be de-
tected and a signal will be issued if the evaluation of the position indicators of the Breaker does not indicate that the
breaker has been switched off sucessfully while this timer runs down.
This supervision scheme is available within all protective relays. This scheme is recommended if Breaker Failures have
to be detected while there is no or not much load flow (small currents). This might e.g. be the case if overvoltage or
overfrequency is supervisioned for a Gen-Set that is running in Stand-by.
50 BF and CB Pos*
A supervision timer will be started as soon as the
BF module is triggered by a trip signal. A Breaker Failure will be de-
tected and a signal will be issued if the measured current does not fall below a set threshold and if simultaneously the
evaluation of the position indicators of the Breaker does not indicate that the breaker has been switched off successfully
while this timer runs down.
This scheme is recommended if Breaker Failures have to be double checked. This scheme will issue a trip command to
the upstream breaker even if position indicators indicate misleadingly (faulty) that the breaker has been opened or if the
current measurement indicates misleadingly (faulty) that the breaker is now in the open position.
*=only available in protective relays that offer current measurement.
Trigger Modes
There are three trigger modes for the
BF module available. In addition to that, there are three assignable trigger inputs
available that might trigger the
BF module even if they are not assigned within the breaker manager onto the breaker
that is to be monitored.
• All Trips: All trip signals that are assigned to this breaker (within the trip manager) will start the BF module (please refer
also to section „Trigger signals of the Breaker Failure“).
• Current Trips: All current trips that are assigned to this breaker (within the trip manager) will start the BF module
(please refer also to section „Trigger signals of the Breaker Failure“).
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