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Author Topic: ST5220V ground  (Read 1350 times)

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toastedsiopao

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ST5220V ground
« on: September 06, 2014, 10:21:45 PM »
I have an ST5 generator, it is wired on 220V, it came without the configuration jumpers, selection of frequency and voltage, so it is fixed at 220V 60hz at 1800 rpm.

When I measured one of its output referenced to its case, its output is 110V,the other output is 110V referenced to the case also. Is this normal? Is it important to attached the case to ground, as in the ground connected to the soil?
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Mary B

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Re: ST5220V ground
« Reply #1 on: September 07, 2014, 03:10:32 AM »
Sounds like it is wired to US standards
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dnix71

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Re: ST5220V ground
« Reply #2 on: September 07, 2014, 03:33:05 PM »
5KW and up gensets "standby" in the US are supposed to be wired like a dwelling. Case ground/split phase 120v/240v 60Hz is correct for the US. You MUST ground the case to the earth per code or the genset will be unsafe to operate. 5kw and up were designed to be connected to house wiring for emergencies, so if that's what you have it for, the genset ground will be bonded somewhere to the house ground (check local codes).

Under 5kw is considered "portable" equipment and usually has a floating ground.
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