HIGH RESISTANCE GROUNDING RESISTOR EQUIPMENT – GE WYE OR DELTA RESISTOR SYSTEMS – DS9181 GENERAL ELECTRIC INDUSTRIAL CONTROL COMPONENTS
WHERE TO USE
The function of a high-resistance grounding resistor equipment is:
- To provide a ground for neutral of an ungrounded three-phase power system, utilizing the high-resistance method. Using this resistor equipment allows the system to operate basically as an ungrounded system. The equipment is designed to eliminate the danger of high transient overvoltages during certain types of ground faults. NOTE: The use of high-resistance grounding on 600-volt maximum systems precludes line-to-neutral loading.
- To provide an immediate warning when the first ground fault occurs through an alarm system.
- To provide a method for quickly locating and removing the fault before another fault develops on another phase, thereby preventing circuit outages due to double line-to-ground faults. This is done by using the pulsing ground current feature and portable detector.
Taps are provided on the standard DS9181 grounding resistor to adjust for a system charging current maximum of 3.5 amps or less. Since the normal charging current for most 600-volt or less systems is usually below one ampere, our standard equipment is adequate; however, for systems with greater charging currents refer to the Company. Data for estimating the system charging current is shown in GEI-100010
For more information on these resistors, please click here, to view pages 2 through 7 in section 6 of the GE Industrial Control Rainbow Catalog for application information, dimensions, outline drawings and how to order.