Also, Delta and Wye are two different types of transformers. I hate to ask why you need to know, because if you need to use/setup or otherwise interface with a transformer and you have to ask this type of question then you should not be doing whatever it is you may be doing. If that is the case you should consult a qualified electrician.
That said, delta and wye are not different types of transformers in themselves. Delta and Wye describe the configuration of the windings in a transformer. You can't have just a Delta or just a Wye transformer.
Just to clarify, current returns from circuits along the neutral, not the ground. The ground is the path for fault current.
The only other thing you might need to know is phase control dimmers (most of those that are in use today) generate insane harmonics which add up on the neutral in a three phase system, requiring the neutral to be overrated 130%, and overheating the transformer if it is not sized with the extra harmonics taken into account.
Transformers designed to work with non-linear loads like phase control dimmers and switching power supplies are said to be K-rated.
It really depends on how the transformer is connected. With the standard delta connection, the neutral is the center tap on one of the three transformers. The ground is also connected here and then earthed. So yes, they are connected.
What do you mean by the neutral continuity?
Not necessarily. I once spent a week troubleshooting problems in a bunch of communication equipment, only to find that the neutral on the delta-why transfromer had been left ungrounded :shock:
For some additional explanation of grounding (earthing) you can check the following link.
Untitled
although it is an on-line book that provides explanation for Electricians to assist them in understanding the Institution of Electrical Engineers Wiring Regulations the U.K. equivalent of the U.S. NEC and the canadian Electrical Code it provides a good explanation of the principles.
US NEC has the Grounding Electrode, Grounding Electrode Conductor, Grounded Service Conductor, Main Bonding Jumper, and Equipment Grounding Conductor. What you are calling the "bond", the NEC calls the Equipment Grounding Conductor. Your "ground" = NEC Grounding Electrode Conductor. The way the NEC is written, "ground" and "bond" are not nearly specific enough without modifiers.
We use essential cookies to make this site work, and optional cookies to enhance your experience.