Amf Panel

An AMF panel activates only if there is a utility failure, and the generator must take over the load without any manual action from someone. In building an AMF panel, we start by establishing the generator's capacity, load priority, and load restoration sequence. Engine cranking cycles, engine safety signals, and power breaker interlocking are all considered to be functional requirements for the AMF panel and not optional issues. An AMF panel can either operate a single DG set in a commercial building, or it can operate with other DG sets as part of a synchronising scheme for critical loads.

The incoming and outgoing circuit breakers will be selected based on the review of the short circuit ratings and the cable size. Where applicable, neutral switching logic will be applied to the earthing system to ensure that there is a proper neutral connection. The AMF panel will be operational in either automatic or manual mode, and the two modes are obviously defined to allow for testing of the AMF panel without interruption to the live load. The voltage and frequency settings on the AMF panel will be established based on the generator characteristics rather than on standard factory values.

The control wiring has been arranged for ease of tracing in the event of a shutdown. The following indications are provided on the door of the AMF panel during transfer to avoid having operators open the panel during transfer: Voltage to Mains (healthy), Generator Availability, Load on Mains and Load on Generator. Simulations are conducted for Mains Failure, Generator Start, Load Transfer (To Generator), Mains Return and Cooling Cycle before shipping.

When these AMF (automatic mains failure) panels are put into service in the US, they will accurately start the generators within a given time, transfer the load in the correct sequence and isolate both sources from back feeding; all while providing a continuous supply to critical appliances.