12
Maintenance
and repairs
When the protection relay is used under the
conditions specified in "Technical data", it re-
quires practically no maintenance. The relay
includes no parts or components that are sensi-
tive 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 in-
spected in association with the secondary test-
ing 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 val-
ues 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
manufacturer. Please contact the manufacturer
or his nearest representative for further infor-
mation about checking, overhaul and recalibra-
tion of the relay.
The protection relay contains circuits that are
sensitive to electrostatic discharge. If you have
to withdraw a relay module, ensure that you are
at the same potential as the module, for instance,
by touching the case.
Note!
Protection relays are measuring instruments and
should be handled with care and protected
against moisture and mechanical stress, espe-
cially during transport.
Spare parts
Combined frequency and rate of change of frequency relay module
SPCF 1D15
Combined power supply and I/O module
- U = 80...265 V ac/dc (operative range)
SPTU 240R4
- U = 18...80 V dc (operative range)
SPTU 48R4
Case (including connection module)
SPTK 1E18
Bus connection module
SPA-ZC 17_
SPA-ZC 21_
Order numbers
(modified 98-03)
Frequency relay SPAF 140 C without test adapter:
RS 452 001-AA, CA
Frequency relay SPAF 140 C with test adapter RTXP 18:
RS 452 201-AA, CA
The letter combinations of the order number indicate the auxiliary voltage U
aux
of the protection
relay. The rated frequency is selected in the software.
AA: U
aux
= 80...265 V ac/dc
CA: U
aux
= 18...80 V dc
Summary of Contents for SPAF 140 C
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