A multi-function unit static switching system for industry

The most important requirements of a control engineer for a static switching system are that it should be easily understood and easily applied. The features considered necessary to meet these requirements are discussed. A range of units having these features has been produced and the principal unit is described in detail. Some indication of its versatility is given and other units of the system are described briefly. The problems involved in extending static switching to the simple industrial application are discussed and the special facilities introduced to overcome them are explained. Two examples of the use of multi-function static switching in industry are given. Some of the factors to be considered when assessing the cost and value of static switching are outlined and future extensions to the range of units are mentioned.