neutral cable burnst on asincronous generator
neutral cable burnst on asincronous generator
(OP)
Helloeverybody, I received yesterday an asincronous generator on my office, and It`s comes with the neutral cable burnst.
This generator is from an hydro unit, and the nameplate is 750 Kw, 1000 rpm, 380 V. This is the only problem, the cable that conects the star point with the terminal to ground is burnst.
On my opinion:
- Maybe we got a third harmonic problem.
- Maybe we got a severe unbalance.
There isn`t trend of the currents or some else information. This is a plant that have no so good control.
Please, could somebody tell me if there is other causes that could cause this problem, and how can I avoid it, at this moment I´m thinking about multiply for 2,5 the nominal size.
thank in advance
This generator is from an hydro unit, and the nameplate is 750 Kw, 1000 rpm, 380 V. This is the only problem, the cable that conects the star point with the terminal to ground is burnst.
On my opinion:
- Maybe we got a third harmonic problem.
- Maybe we got a severe unbalance.
There isn`t trend of the currents or some else information. This is a plant that have no so good control.
Please, could somebody tell me if there is other causes that could cause this problem, and how can I avoid it, at this moment I´m thinking about multiply for 2,5 the nominal size.
thank in advance





RE: neutral cable burnst on asincronous generator
respectfully
RE: neutral cable burnst on asincronous generator
RE: neutral cable burnst on asincronous generator
You should ground the neutral at one, and only one location.
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Sometimes I only open my mouth to swap feet...
RE: neutral cable burnst on asincronous generator
I my opinion (opinion only ) faults while in a synchronised system may result the same situation if the weakest point( Bad Connection ) was neutral- Ground connection and protections failed or insufficient.