Air-insulated switchgear 8BT2

Robust and reliable design

Description

Switchgear 8BT2

  • up to 36 kV

  • up to 31.5 kA

  • up to 3150 A

  • Type-tested, LSC2B-PM type IAC switchgear according to IEC 62271-200

  • 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

  • Vacuum circuit-breaker withdrawable on truck

  • Withdrawable voltage transformers with primary fuses in connection compartment

  • Easy operation amd maintenance

  • Max.security of operation by self-explaining operating logic

  • Use of high-quality standard components

  • Maintenance interval >10 years


Technical Data

Ratings

kV

24

36

Rated voltage

kV

24

36

Rated frequency

Hz

50/60

50/60

Rated short-duration power-frequency
withstand voltage

kV

50

70 1)

Rated lightning impulse withstand voltage

kV

125

170

Rated short-circuit breaking current, max.

kA

31.5

31.5

Rated short-time withstand current, 3s, max.

kA

31.5

31.5

Rated short-circuit making current, max.

kA

80/82 2)

80/82 2)

Rated peak withstand current, max.

kA

80/82 2)

80/82 2)

Rated normal current of busbar, max.

A

3150

3150

Rated normal current of feeder, max.

A

3150

3150

Degree of protection standard

IP4X

IP4X

1) 80 kV was achieved successfully during type-tests 
2) values for 60 Hz

Classification according to IEC 62271-200:

Loss of service continuity category

LSC2B

LSC2B

Partition class

PM

PM

Internal arc classification

Class

IAC

IAC

max. kA

31.5

31.5

s

1

1

Accessibility

A

A

Class designation

A FLR

A FLR

Compartment accessibility
according to IEC 62271-200:

Busbar compartment

Tool-based

Switching-device compartment

Interlock-controlled

Cable compartment

Interlock-controlled and tool-based

Dimensions:

FL

FLR

Width (mm)

1200

1200

Depth (mm)

2450

2700

Height (mm) 1)

2400

2400

Height (mm ) with baffles on end panel

2750

2750

Height (mm) with gas evacuation duct 2)

2900

1) Room height min 3400 mm 
2) Room height min 3000 mm

Installation details:

Installation

Indoor

Number of phases

3

Busbar design

Single

Cable connection

Front / Rear

Cable entry

Bottom

Max. site altitude above sea level (m)

1000


Front and Side View

8BT2 front and side view

1 = Door of low-voltage compartment
2 = Protection device
3 = Capacitive voltage detection system for feeder and busbar
4 = Mimic diagram
5 = High-voltage door
6 = Inspection window for checking the switching-device truck
7 = Opening for locking or unlocking the high-voltage door
8 = Door handle
9 = Opening for manual (ON/OFF) operation of the circuit-breaker
10 = Inspection window for reading the indicators
11 = Opening for earthing switch operation
12 = Openings for switching-device truck operation
13 = Pressure relief flaps
14 = Busbars
15 = Bushings
16 = Block-type current transformer
17 = Withdrawable voltage transformer with primary fuses
18 = Earthing switch
19 = Cable sealing ends
20 = Cable bracket
21 = Low voltage plug connector
22 = Vacuum interrupters
23 = Contact system
24 = Switching-device truck
26 = Earthing busbar


A = Switching-device compartment
B = Busbar compartment
C = Cable compartment
D = Low-voltage compartment