| 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.
Equipment
Range
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 GE high-resistance grounding
equipment, 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.
If
you have any further questions, please e-mail our
sales dept at sales@jostfewkes.com
or utilize our Quotation
Request Form. |
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