11 Years Factory XJM7-W Measuring Box (Outdoor Energy Measuring Box) Wholesale to British
Exterior and dimensions
We are also focusing on improving the stuff management and QC system so that we could keep great advantage in the fiercely-competitive business for 11 Years Factory XJM7-W Measuring Box (Outdoor Energy Measuring Box) Wholesale to British, We sincerely welcome both foreign and domestic business partners, and hope to work with you in the near future!
XJM7-K measuring cabinet (outdoor street lamp measurement control box) is suitable in power supply line with AC 50HZ, rated insulation voltage 660V, rated voltage 380/220v, as energy measurement equipment of residential quarters, villas energy measurement etc.
In line with GB7251.1-1997 and GB7251.3-1997 standards.
Used high voltage power supply, high voltage cable, frequency 250kHz and modulated by 50Hz switcher.
Form a spark at 50 hertz – is thin, long, blue.
Form spark at 250 kHz – is short, thick, white.
And what will happen if you combine the frequency? Long thick arc!