Velatia Ormazabal cgm.3, Operation Instructions Manual

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Description and main characteristics Operation instructions
cgm. 3
ENA type
IG-235-EN version 02
1 Description and main characteristics
cgm. 3
ENA type range is made up of a range of fully gas
insulated modular switchgears, which allow the
configuration of different medium voltage (MV) secondary
electrical distribution diagrams up to 36 kV.
This switchgear range has been designed to meet the
requirements of the following standards:
1.1 Switchgear elements
Each switchgear is made up of a series of independent
compartments:
Fig. 1.1: Main components of modular
cgm. 3
ENA type
switchgears
Gas tank: sealed compartment which houses the busbar
and the switching and breaking elements, where the
insulating medium is gas.
The gas tank has a membrane to allow gases to escape in
the event of an internal arc.
Fig. 1.2: Gas tank
Units
cgm. 3-l
Switch - disconnector switchgear
cgm. 3-p Fuse protection switchgear
cgm. 3-v Circuit breaker switchgear
cgm. 3-rb
Busbar rise switchgear
Standard Description
IEC 62271-1
Common specifications for high-
voltage switchgear and controlgear
standards.
IEC 62271-200
Alternating current metal-enclosed
switchgear and controlgear for rated
voltages above 1 kV and up to and
including 52 kV.
IEC 62271-102
Alternating current disconnectors and
earthing switches.
IEC 62271-103
High voltage switches for rated
voltages above 1 kV up to and
including 52 kV.
IEC 62271-105
Alternating current switch-fuse
combinations.
IEC 62271-100
High voltage alternating current
circuit breakers.
IEC 60529
Degrees of protection provided by
enclosures.
IEC 62271-206 /
IEC 61243-5
Voltage presence indicating systems.
ENATS 41-36
Distribution switchgear for service up
to 36 kV (cable and overhead
conductor connected).
1
Gas tank
2
Driving mechanism compartment
3 Base:
3a Cable compartment
3b Gas relief compartment