The new ECOUPLER 4 combines the best of all worlds: Performance, flexibility, economy and the famous Haefely quality and reliability.The ECOUPLER 4 is an ultra-compact coupling and decoupling network for burst and surge superposition onto three phase mains lines. It can be used automatically or manually.The "EMV-Check" software is compatible with all latest windows versions, and allows full automation of the test routine as well as data gathering and test report generation.