General instructions
Maintenance
IG-136-EN version 10; 23/06/2016
66
cgm.3 system
Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards
7 Maintenance
For safety reasons, maintenance operations
performed directly on the driving mechanism
must be performed WITHOUT any driving
levers inserted.
The live parts of the main circuit and switching equipment
do not require inspection or maintenance, as they are
completely insulated in SF
6
, and therefore free from any
influence from the external environment.
The operating mechanism for the cgm.3 system cubicles
driving devices does not require lubrication for correct
operation throughout its estimated lifetime, according to
the service conditions specified in IEC 62271-1.
These mechanisms must be inspected when used under
extreme conditions (dust, salt, pollution). It is advisable to
carry out at least one operation during the inspections.
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.
Facilities which operate under severe climate
conditions, in excess of those dened as
normal Service Conditions (IEC 62271-1)
, must
carry out the regular preventive maintenance
tasks required. Check with Ormazabal for the
environmental conditions of the installation.
7.1 Voltage presence indicator test
To test the ekor.vpis or ekor.ivds voltage presence indicator,
connect it to a 230 V
ac
power supply. To do this, disconnect
the ekor.vpis or ekor.ivds device from the cubicle, and,
using 4 mm terminals, apply the voltage between the test
point for the phase to be checked and the earth test point.
No polarity is dened for 230 V
ac
voltage, so
either the phase or neutral conductor can be
connected.
If a flashing signal is observed, the device is working
correctly. In order to properly test the ekor.vpis or
ekor.ivds, this check should be carried in the 3 phases.
Figure 7.1 Connection mode ekor.vpis / ekor.ivds
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