Miniature circuit breakers

Mors Smitt offers a wide range of railway hydraulic magnetic circuit breakers. The circuit
breakers are fully configurable to meet the individual requirements.
Advantages
  • Precise, temperature stable mechanism, due to hydraulic magnetic technology
  • Overcurrent sensing mechanism reacts only to changes of current
  • No ‘warm-up’ period to slow down its response to overload. No ‘cooldown’ period after overload before it can be reset. Derating considerations due to temperature variations are not normally required and heat-induced nuisance tripping is avoided
  • A common trip linkage between all poles, another safety feature, ensures that an overload in one pole will trip all adjacent poles
  • A trip-free mechanism, a safety feature, makes it impossible to manually hold the contacts closed during overcurrent or fault conditions
  • Standard dimensions, mounting and current ratings provide maximum application
    versatility
  • Wide range: current ratings to 700 Amps and rated voltages to 600 VAC and 110 VDC are available
  • Options: series trip, mid-trip, switch only (with or without auxiliary switch), remote
    shutdown, shunt trip, and dual coil circuit options are available
Standards
The Mors Smitt minature circuit breakers are designed according the following railway
standards:
  • IEC 60077 Electrical equipment for rolling stock in railway applications
  • EN 50155 Electronic equipment used on rolling stock for railway applications
  • EN 45545-2 Fire protection on railway vehicles
  • NF F16-101/-102 Fire behavior – Railway rolling stock
  • IEC 61373 Shock & vibration resistance – Railway rolling stock
  • AR-Series Railway hydraulic magnetic circuit breaker

    Read more Under normal operating conditions, accidents may not appear to be a problem. However, normal operating conditions are not always guaranteed. Under strained or heavy use, a motor and/or another load-generating component within the equipment will draw additional current from the power source; when this happens, the equipment’s wires and/or components will overheat and may ultimately burn up. In addition to protecting the equipment, the entire electrical system including the control…
  • CR-Series Railway hydraulic magnetic circuit breaker

    Read more Under normal operating conditions, accidents may not appear to be a problem. However, normal operating conditions are not always guaranteed. Under strained or heavy use, a motor and/or another load-generating component within the equipment will draw additional current from the power source; when this happens, the equipment’s wires and/or components will overheat and may ultimately burn up. In addition to protecting the equipment, the entire electrical system including the control…
  • ER-Series Railway hydraulic magnetic circuit breaker

    Read more Under normal operating conditions, accidents may not appear to be a problem. However, normal operating conditions are not always guaranteed. Under strained or heavy use, a motor and/or another load-generating component within the equipment will draw additional current from the power source; when this happens, the equipment’s wires and/or components will overheat and may ultimately burn up. In addition to protecting the equipment, the entire electrical system including the control…
  • FR circuit breaker – hydraulic magnetic, railway, very high current

    Read more Hydraulic magnetic circuit breaker for very high current railway applications to protect electronic equipment and components against unintended high currents. Optional with integrated auxiliary contacts to monitor the circuit. The trip point is always at maximum allowable current, independent of ambient temperature. Mid-trip handle to indicate clearly a breaker operation caused by electrical fault. With unique arc chute design which results in high interrupting capacities. Up to 3 poles which…
  • GR-Series Railway hydraulic magnetic circuit breaker for 35 mm rail

    Read more Under strained or heavy use, a motor or another load-generating component within the equipment will draw additional current from the power source; when this happens, the equipment wires or components will overheat and may ultimately burn up. In addition to protecting the equipment, the entire electrical system including the control switches, wires, and power source must be protected from faults. A circuit protection device should be employed at any point…