Air-insulated switchgear 8BT2

Robust and reliable design

Description

Switchgear 8BT2

  • up to 36 kV

  • up to 31.5 kA

  • up to 2500 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

2500

2500

Rated normal current of feeder, max.

A

2500

2500

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:

16/25 kA
FL

16/25 kA
FLR

31.5 kA
FL

31.5 kA
FL

Width (mm)

1200
(<=1250A)

1550
(>1250A)

1550

1550

Depth (mm)

2450

2700

2450

2700

Height (mm) 1)

2400

2400

2400

2400

with baffles on end panel

2775

2775

2775

2775

with gas evacuation duct 2)

2900

3000

1) Room height min 3400 mm for <= 25 kA, 3900 mm for > 25 kA   
2) Room height min 3000 mm for <= 25 kA, 3100 mm for > 25 kA

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