Ema indutec gmbh designs and suppliesdevelops and manufactures digital controlled transistor static frequency converters of most modern design. These converters find their applications in are used for: heating, hardening, melting, coating and other applications. Transistor static frequency converters have some technical features which include: are available within a power range of 20 kw up to 5000 kw while actual working frequencies of 50 hz up to 100 khz are given.