High Resistance Grounding (Pulsers)
Powerohm Type HR High Resistance Grounding Systems are an
economical means of improving a three-phase ungrounded power
system by providing the following advantages:
System Protection: Offers protection by providing a ground-to-neutral connection for a three-phase power system, while still
allowing to operate as an "ungrounded system." When the neutral
of a system is not grounded, the system is vulnerable to potentially
damaging ground faults.
Transient Overvoltage Reduction: A high resistance grounding
system reduces the magnitude of high transient overvoltages appearing during normal switching of a circuit having a ground fault. High
transient overvoltages may cause failure of equipment or insulation at
locations on the system other than at the point of the fault.
Ground Fault Detection Warning: Instantly provides a warning
when the first ground fault occurs through an alarm signal. An optional
audible horn or red warning beacon is available.
Uninterrupted Service: A single line-to-ground fault left in operation
may result in a second ground fault. If a second fault occurs on
another phase before the first is removed, considerable damage may
be caused by the relatively high line-to-line fault current. The potential
for quickly locating and removing faults before damage occurs to
critical processes minimizes outages, and costly manufacturing
shutdowns.
Improved Personnel Safety: Reducing transient overvoltages,
equipment arcing, fault levels, insulation failures and fault tracing
through circuit isolation schemes decreases hazards to personnel.
