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Class CC and Class J CPP Critical Power Panel

Critical Power Panel (CPP)

Approvals & Standards
cULus
Available in North America only
Mersen’s Critical Power Panel series panelboard offers customers a smaller footprint and lighter weight for quicker installation and reduced cost
Mersen’s Critical Power Panel series panelboard offers customers a smaller footprint and lighter weight for quicker installation and reduced cost

  • Critical Power Panel

    Protect critical power systems with Mersen’s Critical Power Panel series panelboard. This panelboard is designed with high importance applications in mind, featuring:

    • Few connection points to minimize electrical/mechanical points of failure
    • Robust steel back plate
    • High interrupting rating - 200kA with upstream protection
    • Easy selective coordination using Mersen Amp-Trap 2000® fuses

    These benefits lead to a panelboard that is easy to apply, install, and maintain while serving your most important electrical loads.

    This UL 67 panelboard has multiple options for switched fused mains, up to 400A, featuring Mersen’s UL 98 rated Compact Fused Disconnect (CEP) and Amp-Trap 2000 Class CC or Class J fuses for branch circuit protection. Fuses can be changed for the application to offer more time delay or faster protection based on the application. The panel, main, and branch circuits can be applied up to 600VAC or 125VDC.

    CPP-UPS System

  • For use in NEC required and non-required applications, such as:

    • UPS Systems
    • Data Centers
    • Medium Voltage eHouses
    • Emergency Circuits (required by NEC 700.27)
    • Legally Required Standby Systems (required by NEC 701.18)
    • Lighting loads or any load up to 30A (Class CC)
    • For larger loads - motors, transformers - up to 60A (Class J)

    Other Features and Options: 

    • Integral Surge Protection (required on critical circuits)
    • Feed Through Lugs
    • Standard Dual/Sub Feed Lugs on MLO Mains
       

  • Selective Coordination

    Achieving selective coordination typically requires a costly short circuit current study. However, with the Critical Power Panel (CPP), coordination can easily be determined with upstream Mersen fuses. Mersen’s new CPP utilizes its Compact Fused Disconnect and Amp-Trap 2000® ATDR, AJT, or any other Class CC or Class J fuses for branch circuit protection. Simply maintain a 2:1 ratio with upstream Amp-Trap 2000 fuses and the system will coordinate.

    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:

    • 620.62 – Elevator Circuits
    • 700.27 – Emergency Systems
    • 701.18 – Legally Required Standby Systems

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

  • Specifications

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    Mechanical Characteristics

      Class CC Class J
    cULus Certification         UL 67 & CSA 22.2 UL 67 & CSA 22.2
    IEC Certification  IEC 60529 IP20 IEC 60529 IP20
    Touchsafe Design  Personnel have no exposure to energized Components during operation of the system Personnel have no exposure to energized Components during operation of the system

    Electrical Characteristics

      Class CC Class J
    System Ampacity 250A or 400A  250A or 400A 
    Branch Circuit Ampacity 30A CC 30A and 60A J
    Voltage Rating 600VAC & 125VDC 600VAC & 125VDC
    Voltage Type Delta or Wye / 1ph or 3ph / 2, 3, or 4 wire Delta or Wye / 1ph or 3ph / 2, 3, or 4 wire
    Withstand (SCCR) 200kA with upstream protection (25kA standalone) 200kA with upstream protection (25kA standalone)
    Neutral 100A, 200A, 250A Models: 200% neutral; 400A Models: 125% neutral 100A, 200A, 250A Models: 200% neutral; 400A Models: 125% neutral

    Configurations

      Class CC Class J
    Enclosure UL 50 Type 1 UL 50 Type 1
    Interior Only Available as Single Unit                                                                         Available as Single Unit
    Main Incoming                  MLO: (1) #2 to 750 kcmil MLO: (1) #2 to 750 kcmil
             (2) 1/0 to 350 kcmil (2) 1/0 to 350 kcmil
    o 2100A MFS: #2 t/0 100A MFS: #2 to 2/0
    200A MFS: #6 to 300 kcmil 200A MFS: #6 to 300 kcmil
    400A MFS: #2 to 600 kc mil 400A MFS: #2 to 600 kc mil
         Single Cable      (2) #4-4/0 Compression Lug (2) #4-4/0 Compression Lug
         Single Cable      #4-4/0 Crimp Lug #4-4/0 Crimp Lug
         Parallel Cables      #8-1/0 Compression Lug #8-1/0 Compression Lug
         Parallel Cables      #8-1/0 Crimp Lug #8-1/0 Crimp Lug
    Branch Configuration Double Column Double Column

    Circuitry

      Class CC Class J
    Circuits 24, 36, 42

    30A J series: 24CKT, 36CKT, 42CKT

    60A J series: 6CKT, 12CKT, 24CKT

    Hybrid 30A/60A J series: 24CKT/6CKT, 24CKT/12CKT

    Circuits

     

    Compatibility

    Class CC Class J
    For use with Mersen Model CEP - Compact Fused Disconnect For use with Mersen Model CEP - Compact Fused Disconnect

  • For more information

    For more information about the Critical Power Panel, please contact our Mersen panelboard team at 978-465-4977 or fusedpanelboards.ep@mersen.com. 

  • Resources

    Brochures and Flyers

    Instructions

    Data sheet

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