CSA REQUIREMENT FOR NEUTRAL GROUNDING OF GENERATORS

[kisan123]

DEAR ALL,

IS THERE ANY SPECIFIC CSA REQUIREMENT FOR EARTHING OF GENERATOR NEUTRAL?

FOR EXAMPLE, TYPE OF NEUTRAL DEPENDS UPON SIZE AND VOLTAGE RATING OF GENERATORS ?

 

[esee135]

There's an IEEE standard regarding neutral grounding schemes. I've worked with all of them, solidly grounded, neutral transformer, neutral resistor etc. Each type has it's benefits and set-backs. The standards even have a tutorial section to help you work out the sizing.

From what I've seen 11kV and up are generally neutral transformer grounded. The lower voltage machines have a mix match from individual grounds, to shared neutral resistors across a station ground bus etc.

 

[waross]

If grounding the neutral will result in a voltage to ground of not more than 150 volts the neutral of a system must be grounded. Canadian Electrical Code. A standby generator may use a three pole transfer switch and the neutral may be solid with the supply transformer neutral. One common connection to ground may serve both neutrals.
That covers 120:208V and 120:240V installations. For higher voltage systems the neutral may be floating, (not recommended) zig-zag transformer grounded, solidly grounded or impedance grounded.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[davidbeach]

Seems your CAP LOCK key is busted, probably ought to get another keyboard.