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 systems over 25kV, contact us for recommendations.
Solutions
GM-300
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Features & Benefits
- Test Switch included
- Versatile sensitivity adjustment
- Long life LED indicator lights
- Low and high resistance indications
- Simple troubleshooting
- Reduced nuisance trips
- Field replacement boards
- Plug-in relay
- Optional mechanical trip indicator
- Operating window width of 3 ohms
- MSHA approval #041890AMR
Resources
- GM-300 Datasheet (PDF)
- Ground Monitors Brochure (PDF)
Specifications
- Dimensions: 7″W x 9.5″H x 6″D (177.8mm x 241.3 x 152.4)
- Enclosure Rating: NEMA 4X, Powder Coated Aluminum
- Weight: 6 lbs (2.7kg)
- Installation: Front Instrument Panel Mount
- Operating Voltage: 120 VAC
- Current Consumption: 750 mA
- Operating Temperature: -20 to 70C
- Humidity: 0 to 90% R.H.
- Phase Voltage Filters: 7.2 kV, 15 kV, or 25 kV
- Sensitivity: 3 ohms
- Trip Resistance: +/-1.5 ohms
- Trip Delay: No
- Pilot Voltage: 12 VDC
- Outputs: (1) Normally open or Normally Closed Contact Relay-250VAC @ 10 A
- Display: LED indicators
- Backup Battery: OPTIONAL – Rechargeable 12VDC, 12 Ahr
- Test Feature: Yes
- Option: Blocking Inductor-prevents parallel earth pass of signal
- Warranty: 90 Days