To start 55kW motor with 300% starting current limitation
To start 55kW motor with 300% starting current limitation
(OP)
Hi,
I have the above rated motor (1500 rpm) to start. Due to limited power availability from the Utility company, I cannot start the motor with more than 300% of full load current. Direct-on-line(DOL)is out of the question. I am looking at the possibility of using soft starter. However, the vendor is proposing an 'inverter.' What is an inverter? Can it do the job? Space is a constraint. Please advise.
Your prompt reply is much appreciated.
rgds,
Zak
I have the above rated motor (1500 rpm) to start. Due to limited power availability from the Utility company, I cannot start the motor with more than 300% of full load current. Direct-on-line(DOL)is out of the question. I am looking at the possibility of using soft starter. However, the vendor is proposing an 'inverter.' What is an inverter? Can it do the job? Space is a constraint. Please advise.
Your prompt reply is much appreciated.
rgds,
Zak
RE: To start 55kW motor with 300% starting current limitation
Another option that you may consider is an autotransformer starter, which should be less costly and also require less maintenance - although this could take up more floor space than the soft starter.
RE: To start 55kW motor with 300% starting current limitation
Yes, it can perform the function you are seeking. As far as space goes, you'll have to check out products from different vendors to determine the sizes available.
Make sure you become familiar with the application before you select it. Inverters create harmonics by the very act of inversion, and these can reduce the life of your motor in some instances. Many motors are designed specifically for use with inverters to overcome this. Be sure you understand the limitations.
RE: To start 55kW motor with 300% starting current limitation
Another option that you may consider is an autotransformer starter, which should be less costly and also require less maintenance - although this could take up more floor space than the soft starter.
For a useful overview of soft starting, see this reference: http://www.manufacturing.net/magazine/planteng/0500/articles/96/070525.htm
RE: To start 55kW motor with 300% starting current limitation
RE: To start 55kW motor with 300% starting current limitation