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High Performance Current Sensing for Automation

High Performance
Current Sensing for Automation

1-800-959-4014 | sales@nktechnologies.com

1-800-959-4014
sales@nktechnologies.com

Ground Fault Protection

Ground faults can be costly if not checked. They can cause a fire to erupt, create equipment damage, or even shock or electrocute personnel. Numerous safety regulations and electrical codes exist to prevent and protect against ground faults.  These and so much more can be found in our technical guide to ground fault protection.

Home » Ground Fault Protection

Ground Fault Relays

NK Technologies manufactures and warehouses a large selection of Ground Fault Relays to aid in your ground fault protection efforts.  Begin your selection process by choosing your conductor size below.  If you need a custom relay, please contact support.

AGL Series Ground Fault Relay

Conductors Up To 0.75" Diameter

AGT-FD Series Ground Fault Relay

Conductors Up To 1.31" Diameter

AGL Series Ground Fault Relay

Conductors Up To 1.76" Diameter

AG-LC Series Ground Fault Relay

Conductors Up To 4.00" Diameter

Case Studies

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Ground Fault Protection for Preventative Maintenance

Preventative Maintenance Using Ground Fault Monitors

Challenge: There are many industrial applications where monitoring electrical heating elements for leakage to earth is needed. Insulation of electrical apparatus may degrade over time contributing to leakage. When a heating process should not be…

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Ground Fault Protection for Electrical Heating Systems

Electrical Heating System Protection

Challenge: The National Electric Code requires that all (with few exceptions) electric heating sources be protected against faults to ground. Combinations of electrical heating systems and moisture can present a challenge in ground fault protection.…

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Ground Fault Protection for Solar Farms

Detecting DC Current Leakage to Earth

Challenge: Detecting low level AC current without adding a physical connection and added burden to the circuit is relatively easy and quite common. In North America, all electrical outlets mounted in wet environments are required…

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Frequently Asked Questions

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Ground faults occur when current flows from an energized conductor to ground, which can energize other equipment and potentially cause harm if touched. Ground fault detection is critical to protect people and animals from being shocked or killed. NK Technologies, a leading supplier of current sensing and power monitoring products, offers a broad selection of ground fault sensors used to prevent harm to personnel, equipment, and processes.

Ground faults can be costly if not checked. They can cause a fire to erupt, create equipment damage, or even shock or electrocute personnel. Numerous safety regulations and electrical codes exist to prevent and protect against ground faults.

Ground fault relays consist of a single magnetically permeable toroid surrounding current carrying conductors connected to an electrical device such as a motor, heater element, pump, or other machinery. The current transformer detects any imbalance through the conductors measuring current leakage to ground. The ground fault protection relay may then trigger a contactor to disconnect power or to send an alarm to a higher-level control that initiates the appropriate action.

The size of conductors, set points, and subsequent actions if a ground fault is detected all need to be considered. What do the local codes require for protection and disconnect? What is the main goal in setting up a ground fault device? Is it focused on personnel protection or electrical device/process protection?

Ground Fault Protection Applications

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Wet Environments

Agriculture & Aquaculture

Irrigation pumping systems, filter pumps

Biotech and Biopharma

Laboratory environments that use electrical equipment tied to pumping or processing fluids, or electrically powered heating processes

Chemical Processing

Chemical pumps and mixers, heat trace cables

Food/Beverage, Bottling/Canning

Filling machinery, equipment in washdown/hygienic locations

Marinas

Docking facilities (see Ground Fault Detection for High Current Circuits at Marina Docking Facilities)

Electrical Heating Systems

Furnaces and Kilns

Heat treating and annealing

Manufacturing

Heat trace systems, process heating, annealing, drying, curing, overhead cranes

Semiconductors

Process heating (see Ground Fault Detection in Semiconductor Fabrication Equipment)

Commercial Kitchens

Steamers, grills, ovens (see Adjustable Ground Fault Detection for Commercial Kitchens)

Snow Melt

Snow melt cable to clear sidewalks, driveways and roof gutters

General Equipment Protection

Entertainment

Amusement park rides, ski lifts, electrified theater chairs, stage lighting and portable power supplies

Petrochemicals

Process control equipment, pumping systems, heat trace cables

Refrigeration and Compressors

Pumping systems, cooling towers, compressor motors

Timber and Logging

Debarking, sawing, drying, cranes

Utilities and Power Generation

Control systems, transformers, generators, solar panels, wind generators

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