We traditionally have specified closed wye-delta transition starters for electric fire pumps on our projects. The fire pumps typically consist of horizontal split-case electric pumps between 500 and 1,500 gpm.
In the past, we've felt that the closed wye-delta starter offered a good balance of cost (less than soft-start but more than open delta wye) against the impact it has on backup generator sizing (helps generators size more than an open-wye delta but not as much as soft start).
Is soft-start still significantly more expensive than delta-wye closed transition starters?
I am hearing that the cost of soft-starters may have come down significantly and we try to be open-minded to what the industry is offering if we're in the wrong.
Posted anonymously by a member for discussion. Discuss this | Submit a Question | Subscribe
Subscribe for posts on PE Problems and Daily Discussions, straight to your inbox, for free:
Thank You to Our Top March 2019 Contributors!
Sprinkler Designer or Engineer?
Get all of our tools, including the Sprinkler Database, Friction Loss Calculator, Fire Pump Analyzer and more:
Daily discussion questions are open-ended questions posed by members for the benefit of sharing expertise and learning from other perspectives. Join as a member here.
Visit July-October for daily Fire Protection PE Exam sample questions.
Solutions are posted the day after posting.
Comment with your solutions, questions or clarifications.
Please note that questions posted are unofficial and in accordance with NCEES rules are intended to be similar to actual exam questions, not actual exam questions themselves.