NES-H
The type-tested medium-voltage switchgear enhances the product family for our withdrawable units for higher rated value requirements.
The series to 12 kV is designed for very high-energy applications in power stations or industry.
The 24 kV series at this voltage level meets all technical specifications for a powerful system for primary power distribution.
Pressure relief channels, single or collective absorbers and deflector plates are used to discharge hot gases arising in the event of an internal arc.
Design features and classification in accordance with standard IEC 62271-200
| Busbar system | Single |
| Operational availability category | LSC 2B |
| Partition class | PM or PI |
| Internal arc resistance classification | IAC AFLR |
|
Switchgear system |
up to 12 kV |
24 kV |
|
|
Rated values |
max. |
max. |
|
|
Rated voltage |
12 |
24 |
kV |
|
Rated power-frequency withstand voltage |
28 |
50 |
kV |
|
Rated lightning impulse withstand voltage |
75 |
125 |
kV |
|
Rated busbar current |
4,000 |
2,500 |
A |
|
Rated short-time withstand current |
50 |
31.5 |
kA |
|
Rated impulse current |
125 |
80 |
kA |
|
Rated short circuit period |
3 |
3 |
s |
|
Internal arc resistance classification |
AFLR 50 kA / 1 s |
AFLR 31,5 kA / 1 s |
|
