Meet Code Requirements with Mersen’s Fused Coordination Panelboards

Mersen’s Fused Coordination Panelboard (MFCP) is designed to meet requirements defined by the National Electrical Code (NEC) to protect critical power operations.

The MFCP provides a simple 2:1 coordination ratio with upstream Amp-Trap 2000 fuses, eliminating the need for a costly short circuit current study. Panels are provided with a default short circuit current rating (SCCR) of 200kA and provide overcurrent protection through a combination of a circuit breaker and a fuse. MFCP is a UL67 listed panelboard that utilizes commonly available class CC and class J fuses.

Combination rated circuit breaker and fuse for branch circuit protection ensures fuses will open only on short-circuits and the circuit breaker can easily be reset on common overloads. The circuit breaker is designed to operate on overloads up to two times their rating and the fuse over two times up to 200kA.
MFCPs can simplify the process in achieving code compliance for designers. Highlights include:

  • Easy selectivity ratios with upstream fuses
  • Resettable overload protection
  • Voltage: 120/208, 120/240, 277/480, 347/600
  • Main Bus: 250A or 400A,
  • MLO, Fused Main or Non-fuse Main disconnect
  • SCCR: 200kA
  • Surge Protection (SPD) optional
  • 20, 32 or 42 branch circuits
  • Standard 20″ wide
  • Feed through lugs optional
  • Surface mount
  • Uses commonly available class CC and J fuses

Selective Coordination is Simpler with MFCPs

Selective coordination is now simpler, less time-consuming and less costly thanks to Mersen’s Fused Coordination Panelboard (MFCP). Achieving selective coordination typically requires a costly short circuit current study. However with the MFCP, coordination can easily be determined with upstream Mersen fuses. MFCP utilizes Amp-Trap 2000® ATDR and AJT fuses for branch circuits. Simply maintain a 2:1 ratio with upstream Amp-Trap 2000 fuses and the system will coordinate. Many circuit breakers will coordinate easily with downstream fuses.

A system that is selectively coordinated will ensure that any fault condition is localized to the nearest overcurrent protective device. This increases system reliability and decreases downtime. Selective coordination is desired for all systems but is also mandatory per NEC for critical circuits:

  • 62 – Elevator Circuits
  • 27 – Emergency Systems
  • 18 – Legally Required Standby Systems

By localizing a fault to the nearest overcurrent device selective coordination prevents unnecessarily disconnecting other circuits in the system. An electrical system that utilizes Mersen fuses can simply be selectively coordinated by meeting the minimum amp rating ratios. By adhering to the minimum fuse ratios engineers and installers can save time and money because no complex coordination study is required.

Want to learn more about how Mersen’s Fused Coordination Panelboards can help with your selective coordination code compliance?  Ask your French Gerleman representative for more information today!

Mersen Mersen Fused Coordination Panelboards MFCP