2007-08-23 21:07:39 · 1 answers · asked by deepak_8584 1 in Science & Mathematics ➔ Engineering
Despite the misleading answer of the earlier poster, neutral grounding transformers are used to derive a neutral-to-earth connection for systems that do not otherwise have one.
The grounding transformer can have a zigzag winding arrangement, or a wye-delta arrangement.
The transformer primary terminals (wye side) are connected to the power system, and its neutral is connected to earth, perhaps through a controlled impedance. (Usually, with Wye-delta grounding transformers, the impedance is connected inside the delta.) No other load is connected to the delta of the transformer.
These transformers provide a high impedance to normal currents (positive & negative sequence), but allow ground fault currents (zero sequence) to flow, thereby allowing protective devices to operate if a ground fault occurs.
2007-08-24 00:51:41 · answer #1 · answered by Steve W 5 · 0⤊ 0⤋
Grounding Transformer
2016-10-01 05:01:59 · answer #2 · answered by ? 4 · 0⤊ 0⤋
transformers can be catograised as star to delta ,delta to delta delta to star etc so when a star type of transformer is used generally neutral point is grounded for many protective and other reasons
like follows
when there is fault on any one of phase other 2 phases are protected because of neutral grounding
even harmonics are reduced because of neutral grounding
2007-08-26 00:14:31 · answer #3 · answered by sandeep reddy 2 · 2⤊ 0⤋
To get 3 phase 4 wire system for consumer usage. phase to phase = 440 V.; Phase to neutral = 220 Volts (approx)
2007-08-25 01:01:10 · answer #4 · answered by deepak57 7 · 0⤊ 0⤋
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It's used for limiting the maximum ground fault current. It acts as an inductor. YexMav
2016-04-10 06:02:36 · answer #5 · answered by ? 4 · 0⤊ 0⤋
The tranformer is grounded to the neutral of the electrical distribution panel rather than the earth ground.. The reasons for this are explained here...
http://ecmweb.com/power_quality/electric_ground/
2007-08-23 21:22:05 · answer #6 · answered by Anonymous · 0⤊ 1⤋
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2016-08-14 22:30:56 · answer #7 · answered by Anonymous · 0⤊ 0⤋