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

One pole of type HB3 vacuum generator circuit breaker

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)

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