16
Testing of the auto-reclose relay module in-
cludes:
- initiation of auto-reclosure
- output relay operation
- timers
- alarm indication
Testing of auto-
reclose relay module
SPCT 5D54
The operation of the auto-reclose module is
recommended to be tested together with the
overcurrent and earth-fault relay modules. Al-
ways when an overcurrent stage or an earth-fault
stage has been tested, the operation of the same
stage should be tested with the auto-reclose
module. The most convenient way is to use a
circuit breaker for the testing and then connect
the current to be applied to the relay over the
contact of the circuit breaker. The test can also
be carried out without using the circuit breaker.
Then the required configuration is selected in
the auto-reclose relay module (SGF2/7=1).
Start the test by closing the circuit breaker and
wait for the possible reclaim time to elapse.
Connect the energizing current/voltage and al-
low the relay to run the entire AR sequence.
Depending on the configuration the sequence
may include one or several AR shots and ends in
definite tripping performed by a protection
relay module or the auto-reclose module (final
trip function).
During the auto-reclose sequence no actions
that could interrupt the sequence or cause an
alarm signal are allowed. Depending on the
configurations definite tripping will provide an
alarm signal (DEFTRIP).
Testing of auto-reclose
sequence
Maintenance and
repairs
When the feeder protection relay is used under
the conditions specified in "Technical data", the
relay requires practically no maintenance. The
feeder protection includes no parts or compo-
nents that are sensitive to physical or electrical
wear under normal operating conditions.
Should the temperature and humidity at the
operating site differ from the values specified, or
the atmosphere contain chemically active gases
or dust, the relay should be visually inspected in
association with the secondary testing of the
relay. This visual inspection should focus on:
- Signs of mechanical damage to relay case and
terminals
- Collection of dust inside the relay case; remove
with compressed air
- Signs of corrosion on terminals, case or inside
the relay
If the relay malfunctions or the operating values
differ from those specified, the relay should be
overhauled. Minor measures can be taken by
the customer but any major repair involving the
electronics has to be carried out by the manufac-
turer. Please contact the manufacturer or his
nearest representative for further information
about checking, overhaul and recalibration of
the relay.
The protection relay contains circuits sensitive
to electrostatic discharge. If you have to with-
draw a relay module, ensure that you are at the
same potential as the module, for instance, by
touching the case.
Note!
Protective relays are measuring instruments and
should be handled with care and protected
against moisture and mechanical stress, espe-
cially during transport.
Spare parts
Combined overcurrent and earth-fault relay module
SPCJ 4D28
Combined overcurrent and earth-fault relay module
SPCJ 4D28/E351
Auto-reclose relay module
SPCT 5D54
Power supply modules
- U = 80...265 V ac/dc (operative range)
SPGU 240A1
- U = 18...80 V dc (operative range)
SPGU 48B2
I/O module
SPTR 9B25
Case (including connection module)
SPTK 8B17
Bus connection module
SPA-ZC 17_
SPA-ZC 21_
Summary of Contents for SPAA 341 C /E351
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