Mersen medium voltage IEEE fuses

Mersen Medium Voltage IEEE Fuses

 

Medium voltage controllable fuses are a modern innovation providing a cost-effective solution to mitigate the Arc-Flash hazard to the low-voltage side of a medium voltage transformer.

How does the Intelligent Fuse System Work?

The Mersen A155CNF Series operates like a normal MV fuse under short circuit and overload situations. When connected to an Arc-Flash detection system that is properly set up, the MVCF will open the circuit in time to limit the Hazard to Category 2 PPE. The Mersen MVCF System’s Interface Module (CFIM) is mounted in the Low Voltage area and accepts a trip signal from the customer’s existing Arc-Flash detection relay. The CFIM immediately sends a signal over fiber-optic cables to the Actuator Modules (CFAM) attached to the bottoms of the fuses in the Medium Voltage cabinet. The CFAM then causes a switch within the fuse to open. This shunts the current through a much smaller fuse element that opens the circuit in a controlled manner.

Features:

          Fuses fit into existing clips and space – The retrofit can be completed in minutes, provided fiber optic cable is already in place.

          Lowest-cost Arc-Flash Mitigation Solution – A turnkey installation of the MVCF will cost a fraction of other available alternatives

          Exceptional Performance – 50kA short circuit interrupt rating

          Fast response time mitigates the arc-flash energy to Category 2 PPE

          Low Maintenance – Fuses are designed to last 20 years with no maintenance intervals, and the battery lasts for 3 years

          Flexible Design Interface – Designed to be used with a variety of conventional Arc-Flash detection devices and relays

          Minimal stress on other devices – The fuse element softens the voltage spike that occurs when opening. Alternatives may generate an excessive spike that could damage transformer insulation or upstream devices

          Small Back-up Power Cells – The MVCF utilizes small batteries that fit inside the Controllable Fuse Actuator Module (CFAM) versus other solutions requiring multiple lead-acid car batteries

For more information:

http://ep-us.mersen.com/products/catalog/line/medium-voltage-controllable-fuse/

Related Articles


Latest Articles

  • Guide to the Canadian Electrical Code, Part 1[i], 26th Edition – A Road Map: Section 28 – Motors and Generators

    Guide to the Canadian Electrical Code, Part 1[i], 26th Edition – A Road Map: Section 28 – Motors and Generators

    Rule 28-000 – Scope states that Section 28is a supplementary or amendatory section of the code and provides additional and specific requirements for the installation, wiring methods, conductors, protection, and control of all motors and generators. Read More…

  • Statement by ECAO Executive Director, Graeme Aitken on Tariffs

    Statement by ECAO Executive Director, Graeme Aitken on Tariffs

    February 7, 2025 ECAO posted the following statement from Executive Director, Graeme Aitken on their website regarding potential U.S. Tariffs: For almost 80 years, the Electrical Contractors’ Association of Ontario (ECAO) has served and represented the interests of Ontario’s industry-leading, unionized electrical contractors. Over those many decades, ECAO has stepped up during times of challenge… Read More…

  • Rigid PVC Conduit vs. ENT in High-Rise and Multi-Use Applications

    Rigid PVC Conduit vs. ENT in High-Rise and Multi-Use Applications

    February 7, 2025 By Phil Crangi Choosing the right high-rise construction conduit can significantly impact project efficiency and costs. While rigid PVC (Polyvinyl Chloride) conduit may have a lower upfront cost, ENT (Electrical Nonmetallic Tubing) offers more significant advantages due to its long-term labor savings and installation efficiency. ENT and fittings form an integrated system… Read More…

  • EFC Tariff Response: Advocating for Free Trade

    EFC Tariff Response: Advocating for Free Trade

    February 7, 2025 STATEMENT FROM CAROL MCGLOGAN, PRESIDENT & CEO, ELECTRO-FEDERATION CANADA ON U.S. TARIFFS Electro-Federation Canada (EFC), representing Canada’s electrical and automation industry, strongly opposes the recent tariffs announced (an subsequently delayed) by President Trump on Canadian imports. These tariffs threaten to disrupt North American supply chains, increase costs for businesses and consumers, and… Read More…


Changing Scene