EC600 - AC Limiter Testing

EC600 - AC Limiter Testing

How does it work?

The AC Current Limiter works by measuring the current (in Amps) being drawn from the site supply / hook up. If this exceeds a set limit the system will reduce the power being used by the heating system / water boiler until the demand falls back below the set limit. For example if the limit is set at 13A and the hot water is working on 2kW (about 8.7A) and you boil a 1.7kW kettle (about 7.4A) this gives a total of 16.1A, so the system will reduce the hot water setting to 1kW bringing the total current down to 11.75A (4.35A + 7.4A).
NOTE: The system can only control the power being used by the heating system / water boiler, it cannot control the microwave, hob or 230V socket outlets.

How do I test it?

Firstly, you need to ensure the heating system is setup to be controlled by the EC600 system so that the heating can be turned down automatically if required.
At the EC620 control panel scroll to the AC Limiter screen. The centre of the display will show the live current (in Amps) being used by your vehicle. with the heating on and set to 2Kw the display should show 8.7A (and if the battery charger is switched on, this may be 3A higher).
Set the AC Limiter to a value an amp or so higher than the reading (say 10A). Now turn on the electric hob, the value will increase to about 13A (8.7A + 4.3A) and after a few seconds the limiter will activate and reduce the reading load so that the reading is lower than 10A. Now turn the hob off and after several seconds the heating will come back on.

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