IG-123-EN version 11; 23/07/2021
75
General instructions
cpg.0: GIS medium-voltage switchgear,
gas insulated, up to 40.5 kV,
in accordance with IEC Standard
Maintenance
9. Maintenance
For safety reasons, maintenance operations performed
directly on the driving mechanism must be performed
WITHOUT any actuating levers inserted.
The live parts of the main circuit in cpg.0 cubicles do not
require inspection or maintenance, thanks to their gas- lled
insulation, meaning there is no in uence from external
environmental factors. Class E2 electrical endurance tests
mean that the breaking components are maintenance free.
For all other elements, follow the preventive maintenance
instructions indicated by Ormazabal.
Components manufactured from galvanised sheet steel
have been painted to ensure their resistance to corrosion.
Any scratches, dents or similar on them must be repaired to
prevent corrosion.
9.1. Voltage indicator test
To test the ekor.ivds voltage presence indicator, connect
it to a 230 V
ac
power supply. To do this, disconnect the
ekor.ivds device from the cubicle, and, using 4 mm cable
connectors, apply the voltage between the test point for
the phase to be checked and the earth test point.
No polarity is de ned for 230 V
ac
, so either the phase or
neutral conductor can be connected.
If a ashing signal is observed, the device is working
correctly. In order to test the ekor.ivds correctly, this check
should be carried in the three phases.
Voltage presence indication is not su cient in itself
to ensure that the facility has been disconnected
from the electricity supply. Before accessing the cable
compartments, it is necessary to con rm that the
feeder is connected to earth.
The ekor.ivds voltage indicator can be replaced if
necessary. To do so, loosen to release the two screws on
the top right and bottom left of the indicating relay using
a medium-size Phillips screwdriver. The ekor.ivds unit
can then be disconnected from the base without needing
to remove the power.
Figure 9.1. Connection mode ekor.ivds
9.2. Preventive maintenance of circuit-breakers
The driving mechanisms and other elements outside
the gas tank may require preventive maintenance; the
frequency of this maintenance depends on the existing
environmental conditions (harsh environments, dust,
extreme temperatures, etc.) and must be established in line
with the experience and responsibility of the installer.
Preventive maintenance should be carried out every 5 years
or 2000 operating cycles, unless the user, together with
Ormazabal, considers otherwise based on the operating
conditions.
To Next Page
Loading...
Need help?
General
