三相四线零线带电但用电正常是为什么（Why is three phase four wire zero line charged but normal）

三相四线零线带电但用电正常是为什么（Why is three phase four wire zero line charged but normal） 三相四线零线带电但用电正常是为什么(Why is three phase four wire zero line charged but normal) Quote | reply | management | for best reply | 2009-06-13 17:56:35 12 floor see see Points: 296 Post: 9 Registration: 08-09-15 [personal blog] [personal podcast] [add to the good friend] [send message] please landlord explain white, since a phase of FireWire is not live, and how come line voltage normal? What is the magnitude of the 110V voltage between the ground iron and the flat iron? The ground wire and zero line have been re installed. What is the zero line insulation resistance? What is the insulation of the three fire lines to the ground? Is there any problem with the transformer itself? Quote | reply | management | for best reply | 2009-06-13 18:52:38 13 floor CNM2009 CNM2009 Points: 54 Post: 9 Registration: 09-06-07 [personal blog] [personal podcast] [to a friend] [send message] I have done the power transformer maintenance, to what you said, 90% belongs to the transformer leakage. Quote | reply | management | for best reply | 2009-06-14 07:55:16 14 floor Yangbin Hou I have encountered such a situation, zero line neon red neon bulb when the phase determination is not bright, but the three-phase voltage between the normal line, after prosecutors found a phase line and workshop steel jacket worn contact, after troubleshooting reference | reply all normal. | management | for best reply | 2009-06-14 09:33:58 li865062639 floor 15 is not bright the phase phase grounding, do not hit because phase grounding and equipotential grounding iron Quote | reply | management | for best reply | 2009-06-14 11:43:32 16 floor xeuxi TN single-phase grounding system reference | reply | management | for best reply | 2009-06-14 15:28:05 17 floor East quoted gallop snail replies: estimation is the zero line short circuit, the zero line burned out, with a pencil in the transformer grounding at a step by step measuring the zero line should be able to find the fault point quickly -------------------------------------------------------------------------------- If so, the phenomenon that "one phase of FireWire is not electrified" does not exist! Quote | reply | management | for best reply | 2009-06-14 15:28:16 18 floor East quoted reply content rainy smell tea: There is no short circuit on the ground Even if there is no breaker tripping electric equipment will burn! Or do not say such groundless words. -------------------------------------------------------------------------------- If one is connected with the earth, but there is a certain resistance, it will not necessarily burn. At this time, standing on the ground to measure, the grounding of this phase without electricity, the other two is 380 V, the neutral line is 220V. As the line voltage 380V remains the same, the three-phase motor operates normally. The phase voltage and line voltage are also normal. Quote | reply | management | for best reply | 2009-06-14 20:03:33 Bi Qingmin 19 floor is generally neutral grounding transformer end loose, check references can be found | reply | management | for best reply | 2009-06-14 21:23:35 dehua123441 20 floor 4 floor view. I met with the situation and I like.A, B power, C power. The zero line and ground electricity. But the single-phase and three-phase electricity are normal. Check out the grounding wire of the transformer is stolen. To connect the ground wire after everything is normal. Quote | reply | management | for best reply | 2009-06-14 21:57:34 Li Chunhua 1 21 floor should be connected to the grounding wire, burned out. Quote | reply | management | for best reply | 2009-12-06 10:47:17 22 floor upstairs on the snail Quote | reply | management | for best reply | 2009-12-06 15:02:23 ycf2007jx floor 23 is not zero off line reference | reply | management | for best reply | 2009-12-07 19:58:11 24 floor 14 floor the nanny machine may. One phase is grounded, but the zero line is not broken. Just because the current in the ground phase is very large, it causes a three-phase imbalance, and the zero line has current passing through it, and the potential increases. The zero line and said the landlord 110V should be digital test shows, the voltage is 110V. Quote | reply | management | for best reply | 2009-12-08 17:50:37 25 floor yulongwas I've encountered such a problem, finally did not find out what causes. Maybe, as CNM2009 said, the transformer leakage Quote | reply | management | for best reply | 2009-12-08 21:18:28 26 floor of 110V is red line Quote | reply | management | for best reply | see 2009-12-08 21:48:37 27 floor just this much industrial failure phenomenon from the landlord analysis one hundred percent is as the East said one is due to the ground so it is with a test pencil and so the neon bulb does not light the same potential. If the neutral grounding is bad, this is not the case, there will be - line voltage normal phase voltage is not normal, and all mechanical equipment connected to zero, the shell is charged