Air-insulated switchgear 8BT1

Compact design and simple construction

Description

Switchgear 8BT1

  • up to 24 kV

  • up to 25 kA

  • up to 2000 A

  • Type-tested, metal-enclosed

  • Vacuum circuit-breaker withdrawable

  • Easy operation, maintenance and cable access from front

  • Automatic metal protection shutter

  • Max. operating safety by self-explanatory logical operating elements


Technical Data

Ratings

kV

7.2

12

24

Rated voltage

kV

7.2

12

24

Rated frequency

Hz

50

50

50

Rated short-duration power-frequency
withstand voltage

 
kV

 
20

 
28

 
50

Rated lightning impulse withstand voltage

kV

60

75

125

Rated short-circuit breaking current, max.

kA

25

25

25

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

kA

25

25

25

Rated short-circuit making current, max.

kA

63

63

63

Rated peak withstand current, max.

kA

63

63

63

Rated normal current of busbar, max.

A

2000

2000

2000

Rated normal current of feeder,
circuit-breaker, max.

 
A

 
2000

 
2000

 
2000

Rated normal current of feeder, switch-disconnector

A

630

630

630

Rated normal current of feeder, 
switch-disconnector with fuses 1)

 
A

 
200

 
200

 
200

Degree of protection standard

IP4X

IP4X

IP4X

1) Rated fuse current

Classification according to IEC 62271-200:

Partition class for circuit breaker panel

PM

PM

PM

Loss of service continuity category

LSC2A

LSC2A

LSC2A

Internal arc classification

Class

IAC

IAC

IAC

max. kA

25

25

25

s

0.1/1

0.1/1

0.1/1

Accessibility

A

A

A

Class designation

A FLR

A FLR

A FLR

Compartment accessibility
according to IEC 62271-200:

Busbar compartment

Tool-based

Switching-device compartment

Interlock-based

Connection compartment

Interlock-based

Dimensions

7.2kV

7.2kV

12kV

12kV

24kV

24kV

Width (mm)

600
≤1250A

800
≤1250A

600
≤1250A

800
≤1250A

800
≤1250A

1000
≤1250A

Depth (mm)
(with LV compartment)

1200 (1410)

1200 (1410)

1200 (1410)

1200 (1410)

1200 (1410)

1200 (1410)

Height w/o (mm) duct 1)

2050

2050

2050

2050

2050

2050

Height (mm)
with pressure relief duct 2)

2300

2300

2300

2300

2300

2300

Height (mm)
with gas evacuation duct 3)

2350

2350

2350

2350

2350

2350

1) For IAC 0.1s / room height min 2800 mm     
2) For IAC 1 s / room height min 3000 mm     
3) Room height min 2400mm

Installation details:

7.2 kV / 12 kV / 24 kV

Installation

Indoor

Number of phases

3

Busbar design

Single

Cable connection

Front

Cable entry

Bottom

Max. site altitude above sea level (m)

1000


Front and Side View

8BT1

1 = Door of low-voltage compartment
2 = Opening for locking or unlocking the door of the low-voltage compartment
3 = Capacitive voltage detection system for feeder and busbar
4 = High-voltage door of switching-device compartment
5 = Inspection window to recognise the position of the switching-device truck
6 = Opening for locking or unlocking the high-voltage door
7 = Actuating opening for charging the closing spring mechanically
8 = Opening for manual (ON/OFF) operation of the circuit-breaker
9 = Inspection window for reading the indicators
10 = Door handle
11 = Openings for switching-device truck operation
12 = Opening for earthing switch operation
13 = Busbars
14 = Busbar earthing switch
15 = Bushings
16 = Busbar voltage transformer
17 = Current transformer
18 = Voltage transformer
19 = Make-proof earthing switch
20 = Cable sealing ends
21 = Pressure relief duct for A
22 = Low voltage plug conn
23 = Switching-device truck
29 = Opening for busbar earthing switch operation


A = Combined switching-device and connection compartment
B = Busbar compartment
D = Switching-device truck
E = Low-voltage compartment