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Thread: 3 phase soft starter
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01-04-2011, 07:11 AM #1
3 phase soft starter
Good afternoon all,
I have two 3phase 15.75kW ducted units servicing my home. About 25 year old custom designed units and working absolutely perfectly. I was just thinking would it be any benefit to the system to install a 3 phase soft starter to each unit. Would that protect the compressor at start up or is it mainly just to protect from the higher startup current and costs?
I dont have any intention to replace the units, they are specifically designed and fitted under the home and would replace components as and if required, so am rather looking for a way of maintaining or promoting longer life within the components and any future ones.
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01-04-2011, 07:32 AM #2
Re: 3 phase soft starter
If it's not broken, don't fix it.
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01-04-2011, 09:17 AM #3
Re: 3 phase soft starter
Not so much trying to fix, but maintain or extend life expectancy and reduce startup currents and thus costs
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01-04-2011, 12:11 PM #4
Re: 3 phase soft starter
Another idea is to install a Variable FrequencyDrive .The VFD can be programmed to start up the compressor at say 30 Hz for five minutes & then ramp up the speed to the full rated speed . This way you can limit start up current & yet save energy when it is not fully loaded . However , check for the monimum speed as recommended by compressor manufacturer & program its frequency for start up .............