Eaton’s high-resistance grounding (HRG) system limits the magnitude of current during a ground fault, reducing arc flash energy to increase personnel safety and minimize the failure of motors, transformers, power cables and other equipment. Eaton’s HRG system provides integrated fault tracing making it ideal for critical applications such as industrial, oil and gas, petrochemical, healthcare and utility.
Eaton HRG is available in a standalone NEMA 1 or NEMA 3R enclosure. As an option, the system can be integrated within Eaton’s Magnum low-voltage switchgear, low-voltage motor control centers (MCC) and switchboards.
Grounding is commonly used in the electrical industry to mean an intentional connection to earth of conductive materials either solidly or through impedance. An ungrounded system is a system, circuit or apparatus in which there is no intentional connection between the system conductors and earth. A system may still be considered ungrounded if there is a possible connection to earth ground through potential measuring devices or very high impedance devices. High-resistance grounding is an arrangement mainly used in low-voltage systems and is most common in 480 V and 600 V systems. This arrangement means that a certain resistance has been intentionally put between the neutral point of a system and earth ground.
| RATED MAXIMUM VOLTAGE |
600 V |
| GROUND FAULT LIMITING |
1 – 10 Amps, 1 A increments |
SHORT-CIRCUIT WITHSTAND* |
Up to 200 kA |
| ANSI/IEEE |
C37.20.1 |
| UL* |
UL Certified |
| NEMA |
NEMA 1 indoor, NEMA 3R outdoor |
| SEISMIC QUALIFICATION* |
IBC, CBC, UBC Zone 4 |
| RESISTOR |
5 A and 10 A resistors, 1 A taps, custom uses 32 A continuous |
| FAULT DETECTION |
Current sensing and/or voltage sensing |
FAULT LOCATION |
System pulsing |
| * Not available for custom HRG designs |
| CONSTRUCTION |
Metal-enclosed |
| POWER TERMINATIONS |
Top and bottom entry |
ENCLOSURE TYPE |
Standalone, Wall-mount, Switchgear-integrated* |
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