GMSG ANSI Vacuum Circuit Breaker – Siemens
The GMSG ANSI vacuum circuit breaker is designed for medium-voltage switchgear applications (5 kV–27 kV) and offers a complete range of components for ANSI panel builders. Featuring Siemens type 3AH3 circuit breaker operating mechanism, it provides high short-circuit switching capacity, reliability under challenging conditions, and up to 30,000 operating cycles in breakers. Optional equipment includes manual and electrically operated racking systems, lift accessories, and extension rails
Technical Specifications
Voltage rating: 5 kV–27 kV
Interrupting rating: 25 kA–63 kA
Operating mechanism: Siemens type 3AH3
Vacuum interrupters: hermetically sealed, low forward resistance, high short-circuit capacity
Lifecycle: Up to 30,000 cycles in circuit breakers; up to 3,000,000 cycles in contactors
Mounting: Horizontal or vertical
Optional equipment: SIERS 1.0 / 2.0 integrated racking, manual crank, spring charging handle, drawout rails, split plug jumper, test cabinet, electrically operated racking motor, lift truck accessories, fifth wheel assembly, secondary disconnect
Interrupting rating: 25 kA–63 kA
Operating mechanism: Siemens type 3AH3
Vacuum interrupters: hermetically sealed, low forward resistance, high short-circuit capacity
Lifecycle: Up to 30,000 cycles in circuit breakers; up to 3,000,000 cycles in contactors
Mounting: Horizontal or vertical
Optional equipment: SIERS 1.0 / 2.0 integrated racking, manual crank, spring charging handle, drawout rails, split plug jumper, test cabinet, electrically operated racking motor, lift truck accessories, fifth wheel assembly, secondary disconnect
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