NES-D

The type-tested double busbar switchgear with withdrawable unit technology guarantees a permanently safe power supply. High availability and flexible operability are the features for which customers (energy supply companies, large industrials etc.) decide to opt for this system design.

Internal partitioning into eight metal-clad function compartments ensures maximum personnel and equipment protection.

The switchgear is equipped with internal pressure relief channels to discharge hot gases arising in the event of an internal arc. Optionally, a discharge point from the switch compartment or a relief in the switch compartment with a collective absorber can be supplied.

Design features and classification under standard IEC 62271-200

Busbar system Double
Operational availability category LSC 2B
Partition class PM
Internal arc resistance classification IAC AFLR

Switchgear system

12 kV

 

Rated values

max.

 

Rated voltage  

12

kV

Rated power-frequency withstand voltage

28

kV

Rated lightning impulse withstand voltage

75

kV

Rated busbar current

2,500

A

Rated short-time withstand current

31.5

kA

Rated impulse current

80

kA

Rated short circuit period

3

s

Internal arc resistance classification 

AFLR 31.5 kA / 1 s