Recommended Sequence Of Operations; Checking Voltage Presence And 5.10. Phase Balance - Ormazabal cgm.3 Series General Instructions Manual

Recommended sequence of operations

5. Recommended sequence of operations
Before carrying out any operation when voltage
is present, check the SF
manometer.
Do not operate if SF
For safety reasons, maintenance operations performed
directly on the driving mechanism must be performed
WITHOUT any actuating lever inserted.
5.1. Checking voltage presence and phase balance
Any universal comparator
specifications of standard IEC 62271-206 can be used for
checking that the medium voltage cables are correctly
connected to the transformer substations feeder cubicles.
On demand, Ormazabal can supply the ekor.spc
phase comparator unit.
38
gas pressure, using the
6
pressure is low.
6
which complies
IG-183-EN version 06; 31/03/2020
cgm.3 system: medium voltage SF
cubicles up to 38 kV according to IEEE and CSA standards
Do not refill the switchgear.
with Firstly, connect the red cables of the ekor.spc unit to the
corresponding phase test points on the ekor.vpis units,
and the black cable to the ground test point. This operation
must be repeated for all the phases L1, L2 and L3.
See section "1.1.1. Voltage presence indication unit" of
this general instructions document.
General instructions
gas-insulated
6