Ormazabal cpg.0 ENA Series

IG-273-EN version 03; 05/08/2020
6
General description General instructions
cpg.0 ENA range
1.3. Main components
1
Busbar compartment
2
Gas tank
3
Gas pressure relief duct
4
Cable compartment
5
Low-voltage control compartment
6
Driving mechanism compartment
Figure 1.1. Main elements of cpg.0 cubicles
Gas tank
This is a sealed compartment made of stainless steel and
sealed for life which houses the switching and breaking
devices, with SF
6
gas as the insulating medium.
Figure 1.2. Bushing position in gas tank (1)
Depending on the function for which the cubicle was
designed, it may contain the following components:
• Disconnector.
• Earthing switch.
• Internal busbar and connections.
• Vacuum circuit-breaker.
It can be connected to the busbar and the medium-voltage
cables respectively by means of bushings at the top and
bottom.
The gas pressure is conrmed in each cubicle by means
of a pressure switch with a potential-free contact, allowing
it to be used as a remote alarm or blocking/trip for the
specic cubicle.
Busbar compartment
The busbar compartment, also designed to withstand an
internal arc, is located above the gas tank and separated
from the gas compartment. It is made from metal sheet,
oering the degree of protection necessary for the busbar
connection device.
It comprises a fully assembled, tested unit, with solid,
screened insulation.
Figure 1.3. Example of busbar compartment
Toroidal current transformers and/or plug-in voltage
transformers can also be installed in the busbar
compartment, thus avoiding the need for metering
cubicles.