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/