Mine Equipment Electrical Insulation Monitor

Bender Inc. developed the A-Isometer IR425 insulation monitor to increase safety in the operation of ungrounded control circuits in mining equipment. The IR425 is designed to monitor insulation resistance of ungrounded AC/DC control circuits from 0–300 volts. Operating on the AMP (Adaptive Measuring Pulse) principle, the A-Isometer IR425 initiates an alarm when the control wiring of a mining machine and its frame ground falls below preset response values. Based on the machine’s design, this alarm can be used to either alert an operator or shut down the faulty equipment. Additionally, the IR425 automatically checks itself every 24 hours. Operators also can perform external tests and resets by using remote push buttons. According to the manufacturer, the IR425 is also a valuable maintenance tool because it provides continuous status information on the health of the electrical system via its liquid crystal display. Major features include internal and external test/reset buttons, self-monitoring with automatic alarm message, two adjustable response values, a preset function with automatic assignment of basic parameters, two separate alarm relays with one changeover contact each and a multifunctional liquid crystal display. .

www.bender.org

As featured in Womp 09 Vol 01 - www.womp-int.com