14 Years Factory wholesale XJM7-D Measuring Box (Power Lighting Energy Measuring Box) for Norway Manufacturer
Exterior and dimensions
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XJM7-D measuring box (power lighting energy measurement box) is applicable to power, lighting measurement management with AC 50HZ, rated voltage 380 / 220V, three-phase four-wire. The advantages includes large capacity, shunt output switch can be selected by design, measures against stealing.It is can be called flexible, mobile, reliable power distribution equipment.
In line with GB7251.1-1997 and GB7251.3-1997 standards.
For many installations the resistance of the earth electrode can be measured using an earth fault loop impedance test instrument.
This test is explained in the video. Further information is contained in Chris Kitcher’s ‘Practical Guide to Inspection, Testing and Certification of Electrical Installations’, p74-90, see link above.
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