Why the resistance grounding (NGR) is better than Solid
grounding?
Answers were Sorted based on User's Feedback
Answer / jijo
Ngr is using fault current reduced and flow to ground
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / sourabh
Grounding resistors or
reactors are often used in medium voltage systems. These
current limiting devices are connected in series with the
transformer secondary neutral. In the event of a phase-to-
ground fault, the current will flow through, and be limited
by, the neutral resistor or reactor.If a phase-to-ground
fault occurs on any phase cable it will cause fault current
to flow back through
the earth, from the earth into the remote ground, then back
through the grounding resistor to the transformer
neutral.
Is This Answer Correct ? | 1 Yes | 0 No |
NGR: Neutral Grounding Resistance
NGR or grounding transformer using in MV voltage and Soild grounding is using in High & low voltage level as per standards.
Is This Answer Correct ? | 4 Yes | 5 No |
Answer / revathi
In resistance grounding the phases connected to ground
through resistors. it resists the excess flow of current
and trip the circuit.
Is This Answer Correct ? | 2 Yes | 4 No |
What is VVVF Drive ?
what is the cable size we can use for 11kv and 33kv ?
what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?
What is the minimum percentage of power that a powerplant can support in ilanding mode ?
To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?
Actually why the transformers are rated in KVA.?
why we are using R,Y,B colours for 3 Phase ?
Difference between HRG and NGR. Are they both the same thing
what is positive , negative & zero equivalent system resistance
wht is embedded systems? what is new inthis field?
how electronic energy meter works?
What is the basis for selecting Vk/2 or Vk/4 for REF and Differential protection of Transformer and What is the significance of magnetising current