X49
Electrical
- Apr 30, 2009
- 106
I'd like to know how low I can set the current limit on a solid state soft start when starting a centrifugal water pump. The best way would be to test it, but in this case it's not practicle. What information would I need to estimate the minimum starting current?
The motor is 40hp. When the pump starts, it will be pumping into a pressurized water line. The total head is in the 10m to 30m range.
Schneider soft start literature suggests 300% FLA for centrifugal pumps. According to my genset sizing software that will put starting voltage dip of the genset at around 34% when all loads start simultaneously, which may be too high. The genset is existing and I'm trying to add some loads without having to replace it, so I'd prefer to set the soft start at less than 300% FLA.
Thoughts?
The motor is 40hp. When the pump starts, it will be pumping into a pressurized water line. The total head is in the 10m to 30m range.
Schneider soft start literature suggests 300% FLA for centrifugal pumps. According to my genset sizing software that will put starting voltage dip of the genset at around 34% when all loads start simultaneously, which may be too high. The genset is existing and I'm trying to add some loads without having to replace it, so I'd prefer to set the soft start at less than 300% FLA.
Thoughts?