AMR’s GM-300 Ground Check system is intended for use on all high voltage systems where a pilotwire is available. Gound Check systems using the GM-300 are suitable for applications on power systems up to 25kV AC including low and medium voltages. For power systems over 25kV, contact AMR for recommendations.
- MSHA approval #041890AMR
- Test Switch included
- Versatile sensitivity adjustment
- Longlife 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
| 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 |