BE242-BASED DIESEL GENERATOR CONTROL PANEL WIRING  DIAGRAM

We design the future of the generator control panels. We take care to provide state-of-art solutions for our valuable customers. Firstly, the BE242 controller allows you to make advanced diesel generator control panels saving connections, wires, components, and labor hours. By installing the Be242 controller on the door front you are required to cut out a round area similar to panel instruments. This diesel generator  control panel contains all electronic circuits in a compact 20mm thin enclosure.

DIAGRAM DESCRIPTION

  The controller transfers the load to the generator or utility power smoothly, safely, and with short downtime.

This diesel generator wiring diagram illustrates the connections of the controller that monitors the parameters of the utility power and detects all kinds of failure. The controller will then automatically start the engine and initiate a load transfer.

When the engine is cold, the controller starts a programmable warm-up time to run the engine offload. When mains restores, the controller will connect the load to the mains. The engine will stop after cooling down time.

HOW IT WORKS IN DETAILS

The generator is electrically connected to the LOAD via the contactor of the generator when both contacts, KM-AUX and KG-PILOT are closed.

The KM-AUX are the auxiliary contacts of the KM utility power contactor. When the KM is open, the KM-AUX contacts enable the KG.

The coil of the KG is supplied by the generator voltage via a protection fuse.

When switching the generator to the utility power the user may observe a short ‘power outage’. Normally it is about 2 seconds. This is the typical behaviour of the automatic transfer switch: BREAK-BEFORE-MAKE.

UTILITY POWER-LOAD

The utility power is connected to the LOAD via the KM contactor. The coil of the KM is energized by the closed contacts KG-AUX and KM-PILOT.

The KG-AUX are the auxiliary contacts mechanically fitted on KG. Being the contactor of the generator open, the auxiliary contacts are closed.

the-PILOT is the mains control relay. This relay is OFF when the utility power is within the settings. In this case, the COIL of the KM is supplied by the N and L3 of the MAINS via a protection fuse.

It is really important to note why we use the normally closed contacts of the KM-PILOT. By using the normally closed contacts, we are sure to provide priority to the utility in case the ATS controller is damaged or without supply.

If we use the normally open contacts, all the time we remove the DC supply of we remove the battery of the engine, we disable the contactor of the mains.

This is why we use the normally closed contacts. In case of real mains failure, the AMF controller energizes the KM-PILOT. The KM-PILOT contacts will open and the KM will open as well.

Once the KM is open, the auxiliary contacts KM-AUX will close.

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