What is the main purpose of Neutral Grounding transformer in power transformer?
What is the main purpose of Neutral Grounding transformer in power transformer?
(OP)
Hi Everyone,
Good day to all. I just want to have more detail what is the main purpose of Neutral Grounding transformer instead of using neutral grounding resistor?
Hoping to receive a clear feedback. thanks
Good day to all. I just want to have more detail what is the main purpose of Neutral Grounding transformer instead of using neutral grounding resistor?
Hoping to receive a clear feedback. thanks





RE: What is the main purpose of Neutral Grounding transformer in power transformer?
RE: What is the main purpose of Neutral Grounding transformer in power transformer?
A transformer and a resistor or impedance may be used in place of a grounding resistor to lower the voltage on the resistor. If a 13800:240 Volt transformer and a resistor is used in place of a resistor alone to ground a 13,800 Volt system there will only be a maximum of 240 volts across the grounding resistor. It will be safer and may be cheaper.
Bill
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"Why not the best?"
Jimmy Carter
RE: What is the main purpose of Neutral Grounding transformer in power transformer?
Perhaps the OP could clarify which variety he is considering?
RE: What is the main purpose of Neutral Grounding transformer in power transformer?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: What is the main purpose of Neutral Grounding transformer in power transformer?
High Resistance Grounding
High Resistance Grounding Application
RE: What is the main purpose of Neutral Grounding transformer in power transformer?
Neutral resistor blocking is effective in blocking dc neutral currents due to changing earth magnetic field or stray dc currents in the transformer.
however during a fault condition,the earth is to provide a low resistance path for fault current to flow.
With resistor present,there are challenges like maximum resistor overvoltages,transient overvolatges,effect on protection systems,transient and continuos thermal rating, and other factors.
Due to the above mentioned challenges and the potential effects its may have on system reliabilty in case of a fault,neutral grounding is preferred over neutral resistor groundind.
RE: What is the main purpose of Neutral Grounding transformer in power transformer?