Be242 Be242RB OEM's Manual V3.X.XX -
January - 2021 page 23
23
18.0 Typical Application Wiring Diagram
The following drawing illustrates the recommended wiring diagram of the BE242
kit controller. In making the panel please consider the following information.
- Always consult the international standard IEC 61439-1-2-34-5-6-7 IEC 60529
- Keep a reasonable distance between cables that carry 400V utility power and
low-voltage cables committed to control the engine. This will avoid problems in
case of severe lightning.
- Do not under-estimate the maximum operating temperature of the panel.
Consider a proper de-rating of the electrical parameters. A wrong calculation of
the size of the cables, size of terminal blocks or nominal current of the
contactors can produce a dangerous over-heat.
- Always limit the current into the panel, from utility power and generator,
according to the AC1 rating of the contactors and according to the size of cables
and terminal blocks. In case of short circuit, when the automatic protections fail,
you can trust to an additional external overcurrent protection (e.g. circuit
breaker). Doing so, you will preserve the integrity of the panel even in case of
direct short circuit.
- Always protect with appropriate fuse the cables connected to battery plus. A
short circuit on the battery cable can reach several hundreds amps.
- Always use pilot relays connected as close as Possibile to the engine. This is a
special importance if the panel is far away from the generator.
- Despite the fact that BE242RB provides electrical interlock, we recommend
that you use mechanical interlock and auxiliary electrical interlock on the
contactors.
- Before commencing the connection of utility power and generator we
recommend that you test 100% the automation of the engine and generator.
- Before connecting the final LOAD (e.g. the building) always make a test using
some lamps. In this way you are sure that all connections are very well done,
