IF & CMA Type On-Load Switches for DC Traction Applications

ISC Global (Industrial Sales Corporation) is a reliable manufacturer-authorized supplier and wholesaler of Lenoir Elec Load Break Switches, offering high-performance IF and CMA type on-load switches engineered for critical railway traction applications.

Designed for 750 VDC and 1500 VDC traction networks, Lenoir load break switches combine motorized contactor technology with energy storage systems, ensuring safe coupling, isolation, and load switching under the most demanding operating conditions.

Advanced Lenoir Elec IF & CMA Load Break Switches

Lenoir Elec IF and CMA series load break switches are purpose-built for railway traction systems, where electrical safety, switching reliability, and mechanical endurance are essential.

These switches are widely used as:

  • Coupling switches

  • Isolating switches

  • On-load DC switching devices

Their robust engineering ensures reliable performance in high-current DC environments, even during frequent and repetitive switching operations.

Technical Features & Design Capabilities

Modular & Scalable Construction

  • Fully modular design for application-specific configurations

  • One or two main polarities depending on system requirements

  • Compact design optimized for traction cabinets and substations

Electrical Ratings

  • Rated current: 800A to 6300A

  • Operating voltage: 750 VDC and 1500 VDC

  • Breaking capacity: 10kA at 1000 VDC (L/R = 5 ms)

  • Minimum making capacity: 66kA

  • Minimum electrical withstand: 75kA

Operational Safety & Control

  • Visible isolation gap for enhanced operator safety

  • True on-load switching capability

  • Available in manual or motorized operation

  • Motorized versions equipped with energy storage mechanisms to ensure reliable opening and closing

IF Type On-Load Switches & CMA Load Break Switches

IF Type On-Load Switches

  • Designed for frequent DC switching operations

  • Optimized for railway traction power circuits

  • Proven reliability under inductive DC loads

CMA Load Break Switches

  • High-current load break switching capability

  • Suitable for traction substations and rolling stock infrastructure

  • Long mechanical and electrical service life 

Key Advantages of Lenoir Load Break Switches

Lenoir Elec load break switches deliver operational advantages beyond conventional isolators and contactors:

  • Safe on-load switching under high DC currents

  • Exceptional mechanical and electrical endurance

  • High short-circuit withstand capability

  • Enhanced operator safety through visible disconnection

  • Flexible integration into existing traction systems

These strengths make Lenoir load break switches the preferred choice where system reliability and passenger safety are critical.

Applications & Industry Sectors

As an experienced Lenoir Load Break Switches wholesaler, ISC Global supplies these solutions for:

  • Railway traction power substations

  • Metro and urban transit systems

  • Light rail and tramway networks

  • DC power distribution for transportation infrastructure

These environments demand equipment that performs reliably under high fault levels, continuous load cycles, and strict safety regulations.

Why Choose ISC Global for Lenoir Load Break Switches?

  • Trusted Lenoir Load Break Switches manufacturer-authorized supplier

  • Wholesale and project-based supply capabilities

  • Technical selection support and application guidance

  • Fast turnaround for traction and infrastructure projects

  • Global supply and export expertise

Contact ISC Global

For Lenoir Load Break Switches manufacturing support, wholesale pricing, or technical datasheets, contact ISC Global (Industrial Sales Corporation) today. Our team will help you select the right IF or CMA load break switch solution for your railway traction application.