Soft starters in quarrying applications

摘要

Why use soft starters for starting electric motors in quarries when variable-speed drives (VSDs) appear to be relatively cheap? The simple answer to this question is that the majority of motor control applications in quarries are fixed speed and do not demand the complexity and, hence, cost of a VSD. As a result, quarry operators who use soft starters can save a lot of money through a combination of reduced equipment costs, set-up costs and installation costs.