Evaluation between earth switch and earth truck for 11kV Switchgear
Evaluation between earth switch and earth truck for 11kV Switchgear
(OP)
Can anyone throw some light on the evaluation between earth switch and earth truck for 11kV Switchgear.
I personally feel that earth switch is better, as it is integral part of the switchgear, less prone to deterioration due to external factors, storage is not a problem etc.
Less chance to commit mistake and safer compared to earth truck.
I personally feel that earth switch is better, as it is integral part of the switchgear, less prone to deterioration due to external factors, storage is not a problem etc.
Less chance to commit mistake and safer compared to earth truck.






RE: Evaluation between earth switch and earth truck for 11kV Switchgear
Bill
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"Why not the best?"
Jimmy Carter
RE: Evaluation between earth switch and earth truck for 11kV Switchgear
krisys,
In my opinion a fault-making earth switch built into the gear, or a transfer earth applied through a withdrawable circuit breaker, would be preferable to an earth truck.
RE: Evaluation between earth switch and earth truck for 11kV Switchgear
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Evaluation between earth switch and earth truck for 11kV Switchgear
A major disadvantage of going the GTD route is when more than one feeder requires grounding simultaneously, specifically in a dense urban setting with all underground cables and no overhead conductor at all, something I've seen happen numerous times. For this reason I'd go with "earthing switches" instead, particularly in the case described.
CR
"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]
RE: Evaluation between earth switch and earth truck for 11kV Switchgear
Fault-rated earth switches or a circuit breaker transfer earth are much safer ways to apply an earth.
RE: Evaluation between earth switch and earth truck for 11kV Switchgear
CR
"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]