gtc070504gm8000
Ground Sentinel Systems
GAI-TRONICS®
A Hubbell Company
GM8000 Ground Sentinel
For use without components at
machine location.
For Low and Medium Voltage Cables
Up to 1000 Volts. Developed to
comply with MSHA requirements, the
tone monitor interrupts power to the
mining machine if the ground wire is
broken.
• The system ignores the parallel ground path
effect. This being negated by means of the
ground wire trap in series with the ground
wire at the power center.
• For monitoring ground wires of continuous
miners, cutting machines, shuttle cars, roof
bolters and other mining equipment.
• Simplified system — immune to voltage
transients.
• No interaction on multiple installations.
• Simplified installations, no phasing required.
• May be installed and tested with no power on
the power cable.
• No components required on mining equipment.
GM8000 Ground Sentinel Systems
Specifications
Ordering Information
Mechanical:
Stainless Steel. . . . . . . . . . . . . . . . . . . . . . . . . . . 7.46” H x 2.32”W x 5.62” D
- Ground Sentinel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GM8001
- Filter, 3 Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FI2559
- Ground Wire Trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GM1004
Electrical:
• Power 117 VAC, 50/60 Hz ± 15% (105V to 135V)
• One plug-in PC board contains all electronics, including the relay
• Frequency 4000 Hz
A Pilot Wire System includes Ground Sentinel, Ground Wire Trap, and a filter.
Machine Load
Power Center
FA
FB
FC
Optional
Remote
Power
Shutdown
Pilot
Wire
Filter
Ground
Resistor
Training
Cable
Grd.
Fault
Relay
Ground
Wires
Ground
Sentinel
Machine
Frame
Ground
Ground
Wire
Trap
AC
Grd.
Earth Ground
Pub. 070504
GAI-Tronics® USA (Corporate) Toll Free: 1 (800) 492-1212 Tel: (610) 777-1374 Fax: (610) 796-5954 www.gai-tronics.com
GAI-Tronics® UK Tel: +44 (0)1283 500500 Fax: +44 (0)1283 500400 www.gai-tronics.co.uk
GAI-Tronics® S.r.l - Italy Tel: +39 02 4588801 Fax: +39 02 93663110 www.gai-tronics.it
GAI-Tronics® Malaysia Tel: +60-3-8945-4035 / 8945-7348 Fax: +60-3-8945-4675 www.gai-tronics.com
GAI-Tronics® Austdac - Australia Tel: 011-61-28-851-5000 Fax: 011-61-29-899-2490 www.austdac.com.au
Quality Management System Certified by DNV - ISO 9001:2008
The policy of GAI-Tronics is one of continuous improvement; therefore the company reserves the right to change specifications without notice.
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