Active Member
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[China]
Address: Baisha 3rd Village Industrial Area, Humen Town, Dongguan City, Guangdong Province, China
Contact name:Alina
Guangdong Fullde Electrical Technology Co., Ltd |
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10.5KV 48A Generator Neutral Grounding Resistance Complete Sets of Equipment
Brief introduction:
Neutral-Grounding Resistors (NGRs) are used to ground power systems
by inserting a resistor between the system neutral and ground. This
lowers the prospective ground-fault current to a predetermined
value.
A properly designed resistance-grounded system provides benefits
over both ungrounded and solidly grounded systems. Because the
system is grounded, transient overvoltages do not occur and
groundfault current can flow, allowing it to be detected and
measured. Also,because a resistor is used to ground the system, the
very large and destructive ground-fault currents of solidly
grounded systems are absent. Ground-fault relays can be used on
feeders to provide selective coordination and the ability to
quickly locate or isolate the fault.
Applications:
Resistance grounding is typically applied on transformers and
generators where safety and continuity of service are important. A
faulted feeder may remain in operation until it is safe to repair
the fault, where allowed by the local electrical code.
10.5KV-(50A-1300A)Neutral Ground Selection Table:
Fault Current | Resistance | Malfunction Time | Protection Grade | Maximum Temperature Rise | Box Material Quality Selection | Optional |
| 50A | 60.62Ω | 10s | 43 | 760℃ |
1,stainless steel 2,Galvanized sheet 3,Ordinary steel plate
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1,transformer 2, cable box 3, air switch 4, intelligent monitor 5, vacuum contactor 6, current transformer |
