Ground Monitors continuously verify the integrity of the AC ground wire in heavy equipment trailing cables, and transmission lines between electrical distribution stations.  Since 1975, AMR PEMCO has been a pioneer in ground monitor design and sold over 50,000 circuits worldwide.  We offer pilotless and impedance style pilot wire versions for low to high voltage circuits up to 25KV.

GF-180

A ground fault occurs when one of the phase conductors of a cable comes in contact with the ground wire of that cable. This will cause current to be placed on the ground wire, giving it potential for electrical shock. Our GF-180 ground fault will detect a small amount...

GM-150

The GM-150 is pilotless and uses a 45 ohm trip resistance and a 250 ms time delay, which eliminates nuisance tripping from intermittent conditions in the cables and collector ring assemblies. Monitors three phase, single phase, or DC power cables. Requires...

GM-200

The GM-200 Ground Monitor is pilot wireless, eliminating pilot wire costs, repair and lost downtime. But that is not the only way the GM-200 low voltage, single circuit, continuity ground monitor makes for easy maintenance. For starters, the GM-200’s installation...

GM-250

The GM-250 is the most advanced high voltage ground monitor on the market, available in both pilotless and pilot wire operation.  Offering a 45 ohm trip resistance, 250 ms time delay for reduced nuisance tripping, and immunity to DC and AC stray currents.  Easy...

GM-300

AMR PEMCO’s GM-300 Ground Check system is intended for use on all high voltage systems where a pilot wire is available.  Ground Check systems using the GM-300 are suitable for applications on power systems up to 25kVAC including low and medium voltages.  For power...

GM-105-XLD

The newest addition to the AMR PEMCO ground check monitoring line is the GM-105-XLD, “Extra Long Distance,” impedance monitor. With an advanced 125 mA loop current, the XLD allows monitoring of cable lengths of up to 6.5km (4 miles).*  The higher current loop provides...

Head Office

PO Box 234
12187 N Scenic Highway
Rocky Gap, VA 24366

T:  +1-800-541-5583
P:
  +1-276-928-1712
F:  +1-276-928-1815

Hours of operation:
Monday - Friday
8:00AM - 4:30PM EST

Bluefield Facility

1960 Valley Dale Street
Bluefield, VA 24605-9454

GPS > 700 Fincastle Tnpk

T:  +1-800-428-7800
P:  +1-276-326-2611

Hours of operation:
Monday - Friday
8:00AM - 5:00PM EST

After Hours, Weekend & Holiday Service

+1 866-456-0231 (Toll Free)
* A technician will respond by phone within four hours of receiving your call.