是对的
I ne ed a translator for a explanation of harmonic control. Please help translate..
1 main field test, load and 5,7,11 harmonics, because if the harmonic current harmonic currents of five times 278A, 4.5 times more than five times, the standard of gb, beyond 170A harmonic voltage distortion rate 1.7 times. For 7.5% above gb, 5%.
2 as microcomputer control equipment of PLC harm is too big, in the four months, three B&O appears motherboard, control panel, 8, 9 fault # # # # # # # 21, 22 and other multi-goubian PTM frequency converter.
Three other hazards, such as fever, vibration, no test data, the energy consumption is bad, but these should also monitoring.