Ground fault monitoring is paramount to ensuring electrical safety for mine workers. Bender Inc., a leading manufacturer of ground fault protection equipment for the mining industry, provides A-ISOMETER® IR420 Series isolation monitors to boost safety of large AC-powered mining machines.
The A-ISOMETER IR420 series is designed to monitor the insulation resistance of ungrounded AC systems up to 300 V. The response range is steplessly adjustable from 1 kΩ to 200 kΩ, and values are displayed on a seven-segment LCD. A large range of supply voltages can be applied to the unit. By connecting an external supply voltage, it also allows de-energized systems to be monitored.
Other features of the A-ISOMETER IR420 include:
Internal and external test/reset buttons
Self-monitoring with automatic alarm message
Digital alarms with two separate alarm relays
Connection monitoring system
Preset function with automatic assignment of basic parameters
Operates using “superimposed DC voltage” measuring principle.
The A-ISOMETER IR420 also can be used in smaller mining applications such as lighting systems and mobile generators.
