Maintenance - Siemens SIPROTEC 7SJ62 Handbuch

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Maintenance

7SJ62/63/64 Additional Information
C53000-B1174-C170-1
If the relays of type 7SJ62/63/64 are used to protect security-relevant equipment,
proper function must be checked at certain intervals.
Since the relays are self-monitored to a large extend, routine tests serve mainly for
check of the interfaces between the relays and the process as these interfaces cannot
be monitored completely by the devices.
The binary inputs (feedback of the condition of the process), the binary outputs (trip-
ping and signalling contacts), and analog measured values form part of these process
interfaces.
Caution!
Interrupt the control circuits to switching devices, if applicable, before you start tests
or checks. This is to avoid unintended switching operation in the plant.
Tests can be performed according to Chapter 3 of the device's Manual ("Mounting and
Commissioning").
Please, observe absolutely the associated warnings of the Manual during test and
maintenance work.
Routine tests should be carried out in intervals of one year, at the latest after three
years of operation.
Function check of the battery supervision shall be performed at least once per year.
(for this, see Chapter 7).
Maintenance
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