Air-insulated switchgear NXAIR Family

High-end technology at its best

Description

Air-insulated switchgear NXAIR Family

  • up to 17.5 kV / 50 kA / 4000 A

  • up to 24 kV / 25 kA / 2500 A

  • Factory-assembled, type-tested switchgear according to IEC62271-200

  • Metal-enclosed

  • Loss of service continuity category: LSC 2B

  • Partition class: PM

  • Internal arc classified switchgear according to IAC A FLR for 1s arc duration

  • Compact design

  • Air as insulating medium is always available

  • Evidence of the making and breaking capacity for the circuit-breakers and the make-proof earthing switches inside the panel

  • Single busbar, Duplex-switchgear

  • Withdrawable vacuum circuit-breaker and vacuum contactor

  • Platform concept worldwide, local manufacturing presence

  • Use of standardized devices and of maintenance-free vacuum circuit-breakers or vacuum contactors

  • Type-test of earthing switch, vacuum circuit-breaker or vacuum contactor in the panel

  • Cable testing without isolating the busbar

  • All operations with high-voltage door closed

  • Unambiguous position indicators and control elements as standard on the high-voltage door

  • Maximum security of operation by self-explaining operating logic

  • Maintenance interval > 10 years


Technical Data

NXAIR Family - Ratings

NXAIR Family - Rated voltage

kV

17.5

17.5

24

Rated short-circuit breaking current, max.

kA

40

50

25

Rated frequency

Hz

50/60

50/60

50

Rated short-duration power-frequency
withstand voltage

kV

38 1)

38 1)

50 1)

Rated lightning impulse withstand voltage

kV

95

95

125

Rated short-circuit breaking current, max.

kA

40

50

25

Rated short-circuit making current, max.

kA

100/104 2)

125/130 2)

63/65 2)

Rated peak withstand current, max.

kA

100/104 2)

125/130 2)

63/65 2)

Rated normal current of busbar, max.

A

4000

4000

2500

Rated normal current of feeders, max.

A

4000

4000

2500

1) Gost-Standard: 32 kV for 7.2 kV / 42 kV for 12 kV resp. 65 kV for 24 kV
2) values for 60 Hz

NXAIR - Dimensions

Width
- contactor panel
- CB panel (≤ 1000 A)
- CB panel (≤ 1250 A)
- CB panel (≤ 2500 A)

 
mm
mm
mm
mm

 

435
600
800
1000

  
435* 
 
800
1000

 

 
800
1000

Depth
- CB panel
- contactor panel

 
mm
mm

 
1350/1500
1400

 
1650
1650

  
1600

Height
- all panels

 
mm

 
2300

 
2550

 
2550

* till 12 kV only

Front and Side View

Front and Side View NXAIR Family 17.5 kV/40 kA

A = Switching-device compartment
B = Busbar compartment
C = Connection compartment
D = Circuit-breaker
E = Low-voltage compartment

Front and Side View NXAIR Family 17.5 kV/50 kA

Front and Side View NXAIR Family 24 kV/25 kA