The Rockwill three-phase generator circuit breaker is designed for installation between the generator and the step-up transformer in power plants. It provides a compact, reliable solution for generator control and protection in utility and industrial generation facilities.
The breaker employs proven arc-quenching technology with a robust operating mechanism to handle the demanding switching duties of generator applications, including frequent start-stop cycles and load rejection. Its open, accessible design facilitates inspection and maintenance, while the integrated disconnecting and earthing functions reduce the overall footprint within the power plant auxiliary system.
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Key Features
Compact open design ： Minimal footprint for integration into existing power plant layouts and retrofit projects
Integrated switching functions： Combines circuit-breaking, disconnecting, and earthing in a single unit
High continuous current rating ： Suitable for generators up to the medium-output range at 24 kV class
High short-circuit capability ： Rated to withstand the fault levels typical of generator-fed systems
Robust operating mechanism ： Designed for frequent switching operations including pumped-storage duty cycles
Proven arc-quenching technology ： Reliable current interruption under all fault and normal switching conditions
Flexible busbar connection : Adaptable to open busbar configurations common in auxiliary power systems
Technical Parameters
Parameter
Value
Rated voltage (Ur)
24 kV
Rated normal current (Ir)
6900 A
Rated short-circuit breaking current (Isc)
63 kA
Rated peak withstand current
160 kA
Rated short-time withstand current (3 s)
63 kA
Rated frequency
50 / 60 Hz
Insulation level (Um / PF / BIL)
24 / 50 / 125 kV
Applications
Generator main circuit protection and control in thermal, hydro, and gas-turbine power plants
Retrofit replacement of existing generator circuit breakers in aging power stations
Main Categories: Medium and High Voltage Switchgear/Power and Distribution Transformers/Instrument Transformers and Sensors/Lightning Protection and Electrical Insulation/Substations and E-Houses/Electrical Panel and Controlgear
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The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.
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