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DC circuit breakers for traction substations – IEEE standards

With an extremely wide range of configurations and optional features, Sécheron UR-type DC HSCBs ensure the electrical safety of the equipment powering the overhead lines and third rails of DC mass transit (metro, Light Rail Vehicles, tramways, EMU trains) and DC railway systems. Our solutions are compliant with IEEE standards.

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DC circuit breaker UR26-80S IEC
DC circuit breaker UR26-80S IEEE
Supply program for rail transportation
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Product environment

Sécheron is the railway industry’s global partner for electrical safety solutions for DC traction power substations, bringing decades of experience serving the rail industry. Traction power substation manufacturers and operators have come to rely on our experts for personalized support throughout all phases of their DC traction power substation projects, from recommending the most appropriate solution to obtaining local after-sales service worldwide throughout the lifetime of their products.

Our UR-type DC HSCBs come in a wide range of configurations to suit virtually all operational requirements and can be integrated into DC switchgear or metal-clad enclosures configured for line feeder panels, rectifier breaker panels, and interconnecting breaker panels, for example.

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Technical Data
  • Bi-directional or uni-directional, with trip free direct acting device.
  • Rated Voltage 800 VDC and 1600 VDC (1,200 VDC for UR80).
  • Current range from 2000 A to 8000 A.
  • Making & breaking capacity matching operational needs.
  • Electromagnetic closing.
  • Control voltage 110 VDC or 125VDC.
  • Auxiliary contacts for main contact position indication.
  • Constant & limited arc voltage during current interruption.
  • High insulation level – OV4.
  • Ambient temperature – 25 °C to +40 °C.
  • Reference standards: IEEE C37.16; IEEE C37.14.
  • Insulation material according to EN 45545-2.
Documentation
DC circuit breaker UR26-80S IEC
DC circuit breaker UR26-80S IEEE
Supply program for rail transportation

Main Benefits

A wide range of configurations and options
Standard products and custom solutions
Extensive factory reliability testing
Low maintenance
Low Total Cost of Ownership (TCO)
Proven designs accepted worldwide
Long service record
Expert customer support
Worldwide after-sales service

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