professional factory for XJM7-J Measuring box (Infrastructure Energy Measurement Box) Export to Canberra


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XJM7-J metering box (infrastructure power metering box) is suitable in power supply system with AC 50HZ, rated voltage 380 / 220V , as the power measurement in construction site.


Meet GB7251.1-1997 and GB7251.3-1997 standards.

3C certificate:

XJM7-J Mgy Measurement Box)-2

Simple generator provides enough power to light LED’s. There is no relative motion between the permanent magnets and the coil. Instead we open and close the “magnetic circuit” between the magnet and the coil, causing a change in the coil flux, which induces a voltage in the coil by Faraday’s law. Magnets are ceramic/ferrite. Coil has 1500 turns (approx 600 feet) of 30AWG copper magnet wire .

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