Medium-voltage vacuum generator circuit breaker switchgear, type HB3
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
- 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.
TechTopics is a series of papers that discuss issues of interest to users or specifiers of electrical equipment.
- No. 02 - Loss of vacuum
- No. 14 - X-radiation emissions by vacuum interrupters
- No. 24 - Checking integrity of vacuum interrupters
- No. 44 - Anatomy of a short circuit
- No. 67 - %dc component
- No. 71 - Generator circuit breakers
- No. 72 - Generator circuit breaker applications - delayed current zeroes
- No. 73 - Generator circuit breaker applications - transient recovery voltage
- No. 77 - Residual voltage on load side of an open circuit breaker
- Entire TechTopics catalog
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