Avoiding electrical accidents and equipment damage are keys to reducing liability and increasing productivity. Minimum ground fault protection can be incorporated into the main power disconnect device and could be considered adequate for the entire system. However, in such a design, any downstream ground fault could trip the main protective device resulting in a complete substation power outage. The NEC's purpose, in its own words, is "the practical safeguarding of persons and property…but not necessarily efficient, convenient, or …for good service…" (Article 90.1A, B). In other words, system reliability is left to common sense and good engineering design practices. For this reason ground fault protection of the circuit may be highly desirable and recommended for reliable and continuous operation.
TRC engineers designed the HD-PRO models specifically for high current, rugged environments and these models are field-proven in all kinds of tough applications. The entire HD-PRO family (120V/30A to 600V/80A) is designed to trip within 25 milliseconds after ground fault detection at an adjustable selected trip level of 6, 10 or 30 mA.
Disclaimer: Information contained in these publications regarding device applications and the like is intended as suggestion only and may be superseded by updates. It is your responsiblity to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by TRC with respect to the accuracy or use of property rights arising from such use or otherwise.
For electrical safety guidelines and how to avoid electrical shock in certain applications, please download the following Application Notes:
Arc Welding
Arc Welding is described as using a welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point. Find out why and how you should always use a local ground fault circuit interrupter (GFCI) when operating arc welding equipment.
Assembly Equipment
Assembly Equipment provides automation in the production process. Automated assembly equipment includes insertion, brazing and soldering, clinching and stitch folding, eyeleting, injected metal (IMA), riveting, screw driving and welding, just to name a few. Find out why and how you should always use a local ground fault circuit interrupter (GFCI) when working with or operating assembly equipment.
Conveyors
Conveyors are commonly found in factories, industrial facilities, warehouses, distribution centers and in a large number of manufacturing workplaces. Find out why and how you should always use a local ground fault circuit interrupter (GFCI) when working with or operating a conveyor power system.
Hoists
Hoists are one of the top productivity enhancing tools found almost anywhere goods are regularly moved, worked on and/or mounted into an assembly. Find out why and how you should always use a local ground fault circuit interrupter (GFCI) when operating a hoist power system.
Pressure Washers
Pressure Washers are powerful tools used for washing buildings, bricks, floors, storefronts, parking lots, dumpsters, bus fleets, machinery, farm equipment, engines and more. Find out why and how you should always use a local ground fault circuit interrupter (GFCI) when operating a high pressure sprayer washer.
Tile and Concrete Cutters
Tile, concrete and other wet saws are key pieces of machinery used every day by cutters that need portable saws on all installations requiring a custom cut for a perfect fit. Find out why and how you should always use a local ground fault circuit interrupter (GFCI) when operating wet saws.
Mining
Mining is basically done to extract out natural resources from the earth. There are different processes; open cast mining, placer mining, and underground mining. Find out why and how you should always use a local ground fault circuit interrupter (GFCI) when operating mining equipment.
