System Grounding

Hello Guest,

There are so many variables, you need to narrow the scope of your question.

Please reply, with

Kind Regards....

You may be referring to grounding transformers? If so please consider the following:

> For Zigzag Grounding Transformer: the neutral of a zigzag transformer must be solidly grounded when applied to low voltage system, while it must be resistance grounded when used in medium voltage system.

> Wye-Delta Grounding Transformer: The wye-side must be connected to the line with the neutral grounded through a resistor. The delta-side must be closed to provide a path to the zero sequence current.

> Solid Grounding: Applicable to low-voltage and medium voltage systems greater than and including 13.8KV.

> Resistance Grounding: Applicable to medium voltage systems below 13.8KV

i. Low-resistance Grounding: Used to limit ground fault current to 200 - 400 amperes.

ii. High-resistance grounding: Used to keep a faulted feeder functioning during a ground fault until an orderly shutdown of equipment can be effected; and to keep the ground fault related damage to minimum.

Hoping this simple reply will help you. Good day to you.

The question about Grounding is further discussed on another thread under the title Earthing and Grounding, or something like that. Sparkstation gave a great answer and the discussion goes on to mention isolated grounding, wire coding, and other nuances. The new CR4 member who responded spoke of grounding in ways I have no experience with, but found fascinating.