Medium-voltage vacuum generator circuit breaker switchgear, type HB3

24 kV
  • For 100 MW to 400 MW machines

  • Rated short-time withstand current up to 100 kA

  • Rated continuous current up to 12,500 A self-cooled

Type HB3, medium-voltage vacuum generator circuit breaker switchgear

Siemens offers a fully customizable stationary type vacuum generator circuit breaker tested to IEEE C37.013. Each design is engineered to meet the specific electrical and mechanical application requirements of the project. 

HB3 type GCB switchgear

Features

Features include:

  • All medium-voltage switching components, including the vacuum generator circuit breaker, are mounted on a removable, fully integrated, compact switching module for each pole 
  • Continuous current ratings of 6,300 A, 8,000 A, 10,000 A, and 12,500 self-cooled
  •  Interrupting ratings of 80 kA and 100 kA 
  • Maximum design voltage up to 24 kV 
  • Tested to IEEE C37.013 standard for generator circuit breakers 
  • Up to 30 interruptions at rated short-circuit current 
  • No SF6 gas for insulation or interruption 
  • Pair with Siemens protective relays to provide complete generator protection
  • Uses the latest developments in vacuum interrupter axial-magnetic field (AMF) technology 
  • Highly reliable vacuum interrupters – MTTF over 50,000 years 
  • Highly reliable spring-drive operating mechanism due to use of common type 3AH3 operator platform 
  • Over 120,000 type 3AH3 operators produced since 1998 and over 25,000 operators produced per year 
  • 10,000 continuous current switching operations 
  • Complete switchgear shipped as one final-assembled unit 
  • Significantly lower life cycle costs due to reduced inspection and maintenance costs and a reduced-maintenance, stored energy (spring) operator.
  • Optional start-up disconnector for connection to SFC 
  • Connections to generator and step-up transformer using isolatedphase bus (not furnished) 
  • Current and voltage transformers available to suit specifications 
  • Surge arresters and surge capacitors optionally available.

 

Ratings

Rated values and related capabilities

IEEE C37.013

clause

Units
Circuit breaker type 17.5
Circuit breaker type 24.0
Rated maximum voltage (V)
5.1
kV
HB3-17.5
HB3-24.0
Power frequency

5.2

Hz

50/60

50/60

Rated continuous current (self-cooled)

5.3

A

6,300, 8,000, 10,000, 12,500

6,300, 8,000, 10,000, 12,500

Rated dielectric strength (withstand voltage) power frequency (dry)

5.4.2 C37.013a, table 4

kV

50, 60

60, 70

Rated dielectric strength (withstand voltage) full-wave impulse (1.2 x 50)

5.4.2 C37.013a, table 4

kV peak

110, 125

125, 145

Rated short-circuit current system source (100%) (I)

5.8.1

kA sym

80, 100

80,100

Rated short-circuit current system source (100%) (I) dc component

5.8.1

%

70, 75

65,75

Rated short-circuit current system source (100%) (I) asymmetrical (total)

5.8.1

kA rms

112, 146

112, 146

Rated short-circuit current generator source

5.8.2.3

kA sym

40, 63

40, 63

Rated short-circuit current generator source dc component

5.8.2.3

%

130

130

Rated short-circuit current generator source asymmetrical (total)

5.8.2.3

kA rms

84, 132

84, 132

Close and latch capability (274% I)

 

kA peak

219, 274

219, 274

Short-time current-carrying capability (100% I)

5.8.2.7

kA sym

80, 100

80, 100

Short-time current duration

5.8.2.7

s

3

3

Transient recovery voltage (TRV) rating system source E2 peak voltage

5.9 C37.013a, table 5

kV

32.2

44.2

Transient recovery voltage (TRV) rating system source RRRV (TRV rate)

5.9 C37.013a, table 5

kV / μs

4.5

4.5

Transient recovery voltage (TRV) rating system source T2 time-to-peak

5.9 C37.013a, table 5

μs

8.4

11.5

Transient recovery voltage (TRV) rating generator source E2 crest voltage

5.9 C37.013a, table 6

kV

32.2

44.2

Transient recovery voltage (TRV) rating generator source RRRV (TRV rate)

5.9 C37.013a, table 6

kV / μs

1.8

1.8

Transient recovery voltage (TRV) rating generator source T2 time-to-peak

5.9 C37.013a, table 6

Text

21

28.8

Transient recovery voltage (TRV) rating out-of-phase E2 crest voltage

5.9 C37.013a, table 9

μs

45.5

62.4

Transient recovery voltage (TRV) rating out-of-phase RRRV (TRV rate)

5.9 C37.013a, table 9

kV / μs

4.1

4.1

Transient recovery voltage (TRV) rating out-of-phase T2 time-to-peak

5.9 C37.013a, table 9

μs

13

17.9

Rated load-current switching capability

5.10

A

6,300, 8,000, 10,000, 12,500

6,300, 8,000, 10,000, 12,500

Out-of-phase current switching capability

5.12

kA

40, 50

40, 50

Mechanical endurance

 

operations

10,000

10,000

Continuous current switching endurance

 

operations

10,000

10,000

Weight

Amperes

lbs (kg)

6,300 A

15,212 (6,900)

8,000 A

15,873 (7,200)

10,000 A

16,535 (7,500)

12,500 A

16,535 (7,500)

Dimensions in inches

Mailing address

Siemens Industry, Inc.

7000 Siemens Road

Wendell, North Carolina 27591

United States