Electrical control panels have 3 types according to the standrds:
1- Manual: The most simple type and presence and manual order of operator is necessary for the start of diesel generators
2- Emergency: This type of panels aren't manual and automatically with connecting and disconneting city electric power input and output electrical circuit.
3- Synchronize: It is able to connect to each other or city electric . Also it is able to share the load between generators with different proportion.