NES-H

The type-tested medium-voltage switchgear enhances the product family for our withdrawable units for higher rated value requirements.

The series to 17.5 kV is designed for very high-energy applications in power stations or industry. Use of special generator switches under standard IEEE C37.013 is possible.

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 17.5 kV

24 kV

 

Rated values

max.

max.

 

Rated voltage  

17.5

24

kV

Rated power-frequency withstand voltage

38

50

kV

Rated lightning impulse withstand voltage

95

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