General Description - ABB DCBreak Series Instructions For Installation & Operation

D I S T R I B U T I O N S O L U T I O N S
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2. General description
DCBreak circuit breakers are high speed DC
breakers for applications on rail rolling stock.
They are available for 900 VDC and 1800 VDC
voltage ratings with 1500 A rated thermal current.
The contacts are opened and closed by means of an
electromagnetic actuator which can be energized by
a wide range of auxiliary voltages. The circuit
breakers are equipped with an instantaneous
release for bidirectional overcurrent that
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1 Insulating structure
2 Arc-quenching chute
3 Main circuit connections
4 Overcurrent detecting system
5 Auxiliary contacts
6 Electromagnetic actuator
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continuously adjusts to the trip value required by
the specific application. DCBreak circuit breakers
feature long mechanical and electrical life and
comprise various subassemblies, which can be
easily inspected during preventive maintenance
work. The insulating materials used conform to the
strictest international standards governing mass
public transport as regards reaction to fire.
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