I am engaged in low-voltage distribution cabinet installation wiring work. Want to learn design, need to see what books? Added: engaged in low-voltage distribution cabinet (disk) with the disk installation and a second line wiring work has been more than six months. Preliminary read the "circuit based" this book. The company's main product is the crane crane low-voltage automatic control system cabinet (disk), PLC cabinet and frequency cabinet. Want to engage in these three aspects of the design work. It is imperative to learn the design of low voltage distribution systems. Would like to ask what should be learning, there is no good book recommended. More
This is a standard problem, our country's TV support PAL system, you can switch on the remote control, the general remote control marked "standard" or "sys ***" words. Make sure your line is not wrong
I was doing the power of civil construction, to tell the truth I have never heard of a galvanized pipe, only heard of vinylon, glass pipe, coated steel pipe. Only heard galvanized flat iron, channel.
The meaning of U0 / U of the cable is: U0 refers to the voltage value of the cable core to the insulation shield, that is, the main insulation voltage of the cable can not be confused with the phase voltage; U refers to the line voltage used by the cable. That is, the same voltage level of the line using the cable may U0 is different, generally the neutral point grounding system U0 lower than the unattached system U0. Oh, two days ago our provincial network company experts just told us about the lesson. Pressure test is playing when the U0 2-2.5 times.
