Safety elements
General instructions
63
cpg.1
Fully SF6 gas insulated single and double busbar GIS switchgears up to 36 kV in accordance
with IEC Standards
IG-137-EN version 03; 23/06/2016
8 Safety elements
8.1 Maintenance
For safety reasons, maintenance operations
performed directly on the driving mechanism
must be performed WITHOUT any driving
levers inserted.
The active parts of the driving devices and main circuit of
cpg.1
cubicles do not require inspection or maintenance,
thanks to the integrated SF
6
insulation, meaning there is
no influence from external environmental factors. Class
E2 electrical endurance tests mean there is no restriction
on maintenance of the breaking components.
The operating mechanism for the
cpg.1
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.
8.2 Voltage presence detectors
The voltage presence/absence indicator installed in
cpg.1
cubicles is designed and built in accordance
with the recommendations laid down in standards
IEC 61243-5, VDE 0682 Part 415
and
IEC 62271-206
,
within the integrated detectors without auxiliary power
supply category.
Figure 8.1
Voltage presence-absence indicator
The unit has three light signals corresponding to phases
L1, L2 and L3. On the front of the indicator, a test point
is accessible for each of the phases and earth, which is
used to test the balance of all phases. We recommend
use of any universal phase comparator which complies
with standard
IEC 61243-5
.
As an option, the unit has a free auxiliary contact for
remote indication of voltage presence/absence.
The device indication complies with the requirements laid
down in standard
IEC 61243-5
:
Absence of
voltage
Uncertainty
Presence of
voltage
U < 10% U
r
10% < U
r
< 45%
U > 45% U
r
*U
r
, rated operating voltage.
U, phase-to-earth voltage.
The presence of voltage is indicated by activation of the
LEDs for each of the phases. If the presence of voltage
is not detected, the LEDs for each of the phases remain
unlit.
Summary of Contents for Ormazabal cpg.1 Series
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