Profile: Mertech Ltd specializes in providing electrical products. Our products include switchgears, distribution boards, AMF panels, generator control and oil level control system. Our switchgear includes wall mounted distribution boards and the way up to 100kA fault rated systems. Automatic mains failure panels are electrical source changeover devices usually for maintaining the essential services to a building or site where the continuity of supply is paramount. These amf panels monitor the loads via a three phase electronic measuring device and when the supply falls out of limits the standby generator is given a signal to start.