Wire diagram for ELC
Below are the wire diagrams for the ELC.
They are the diagrams RHL generally uses. All combinations in
the table are
possible (eTxcept 40 kW and 48 kW with 1 card). When ampere
shown, it consists of a coil
with wires to an amp meter. Simple amp meters without coils have proven
to be unreliable.
Please note the following:
- The location of the ELC components are chosen by the manufacturer.
Be sure that the air is free to move around the
- The amp meters consist of two components, a coil, an amp meter and
wires between the amp meter and the coil.
- LED's (Light Emitter diodes) need to be mounted on the door of the
control box so they can be seen by the operator.
- The ELC can be made with 2 triacs in parallel which uses
less coils and wire. The parallel connection allows 4 kW (two 2000
W elements) to be connected to one connector. Some of the wire diagrams
(above 24 kW) are using the parallel connection, RHL recommend now that
each triac have its own coil and wire, and connector for a 2 kW
(1) Wire area in mm2 for main wires and
neutral. For wires where the full current is not
wire area to 3 mm2/A or more.
Above 12 kW, it is recommended to use 2 cards and 2 transformers. A
larger plant is more important so the backup benefit (in case a card or
transformer fails) is well worth the small extra cost.
ELC with switches have generally been used when the turbine
room is far away from the ELC room or when the turbine doesn't have a
direct manual flow control (Kaplan turbine). The operator can
manually load the alternator and control voltage by turning on water
heater elements. This is a back up control method if the ELC
Description of name:
24kW3ph1f2c: Means 24kW capacity, 3 phase, 1 fuse per phase (or that
the output lines goes in one direction) with 2 cards.
24kW3ph1f2c_sw: Mean that the ELC has switches