COMEM 170SD Manual De Instrucciones página 8

Operation and maintenance
The pressure relief device is ready for operation after
installation and electrical connection.
To check the switches pull the signaler out of the housing
to activate the switches. Then press the signaler back into
the housing to switch back the switches.
Operating
If the optical signaler is in the normal operating position,
this means that the pressure relief device has not been
tripped. If the switches report a signal anyway, the cause
may be in the tripping circuit. In this case, check the
tripping current circuit.
If the optical signaler is in the "alarm" outlet position, this
means that the pressure relief device has been tripped.
If the switches don't report a signal, the cause may be in
the tripping circuit. In this case, check the tripping current
circuit.
In this case contact the transformer manufacturer or the
on-load tap-changer manufacturer.
8
PRESSURE RELIEF DEVICES 170SB, 170SC AND 170SD
Maintenance
Regular maintenance is not required.
We recommend inspecting of the external condition of
the built-in device for damage and dirt. Remove dirt as
necessary.
Storage
The 170SB, 170SC and 170SD pressure relief device
storage has to be done in its packaging, in dry place with
temperature in the range -10°C ÷ +40°C.
Upon receiving the pressure relief device, please check:
• the outer surface of the packaging to check that it is
intact;
• that there are no breakages.
If damages are found, please contact COMEM (e-mail: co-
[email protected]), quoting the data provided in
the shipping list and the serial number of the 170SB, 170SC
and 170SD pressure relief device.