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Service Panel Protection

Taking compact protectors to the next level, MCG's new PT Series is the most advanced nonmodular protector money can buy. Within its small 10" x 10" enclosure, there are up to 20 high energy, thermally protected varistors packed inside. These high performance varistors are typically only found in much higher priced protectors.

Critical electronics are saved by multiple fused surge paths per phase. The redundant paths are comprised of high energy surge fuses that conduct large surge currents repeatedly without degrading. Front panel protection status LEDs and 1 Form C relay contacts let you know the protector's status at a glance. A surge even counter (standard on PT250) displays the number of times that the protector diverts a surge. An abnormal voltage monitor LED monitors voltage between Neutral and Ground, illuminating when abnormal voltages are detected.

The PT Series guards small to moderately sized service entrance panels as well as branch panels, transfer switches and network closets.



  • I peak: 250,000A/Phase (PT250)
                 160,000A/Phase (PT160)
                 120,000A/Phase (PT120)
Filter Attenuation MIL STD 220A (50 Ohm):
  120VAC   240VAC 277VAC
-30db 50kHz   50kHz 80kHz
-40db 130kHz   130kHz 180kHz
-50db 195kHz   195kHz 270kHz
-60db 230kHz   230kHz 300kHz
  • Thermally protected varistors with integral fuse element
  • Surge event counter optional (standard on PT250 only)
  • Remote 1 Form C relay contacts with status LED
  • Redundancy - Multiple fused surge paths/phase
    PT250 - Triple Redundant
    PT160/120 - Double Redundant
  • All modes protected
  • Front Panel Status Monitoring
  • 10 AWG connection cable
  • UL1449 3rd Ed Listed, including the requirements of Feb 9, 2007
  • EMI/RFI filter
  • NEMA 1, Powder Coated Steel Enclosure
  • 20-year warranty

Surge Current/Phase (8/20s)PT250:

1 Event - 250kA. 10,000 Events: 12kA

Surge Current/Phase (8/20s)PT160:

1 Event - 160kA. 10,000 Events: 6kA

Surge Current/Phase (8/20s)PT120:

1 Event - 120kA. 10,000 Events: 4.5kA
Status Indicators: Green LED Indicators - Protection Status
Red LED Indicator - N to G Voltage Monitor
Green relay contact status LED
Modes of Protection: L-N, L-G, L-L, N-G
Operating Altitude: 13,000ft. (4000m)
Temp. (Operating/Storage): -40 to +70C/-40 to +85C
Enclosure: NEMA 1, 16 gauge steel (0.050" thick), Powder Coated
Cable Connection: 10 AWG (5.27mm) cable, 3 ft. (91.4cm) provided
Dimensions: 10" x 10" x 4" (254 x 254 x 102mm)
Mounting: 10.75" x 8.5"/.220" ID - 4 holes
(273 x 216mm/5.6mm ID) -4 holes
Weight: 12 lbs. (5.5kg) for PT250
11.4 lbs. (5.2kg) for PT160
11.2 lbs. (5.1kg) for PT120


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Last Updated 10/27/10