2017年10月29日 · If you have a device that needs 240V (220, 230, 240V is all nominally the same), the device generally will not care if that is derived as 1 phase and a neutral as you find elsewhere in the world, or 2 ends of the same phase as you find here, just so long as the voltage measured between the two lines reads 240V. But here in the US, if you are ...

2018年2月5日 · Please excuse me for such a basic question, but I can't seem to find a clear answer to it. When we say that mains power is 220 VAC, or 230, 110 or whatever value, is that the signal's amplitude, the

2024年1月18日 · More modern packages like TO-247, TO-220, TO-3P are mounted directly on the heatsink, without the extra thermal resistance and cost of the L-bracket. Now if you put the TO-3 on the heat sink directly then heat still has to travel a long way in the wrong direction in the flat aluminium piece behind the transistor.

2015年8月6日 · To convert your 380/220 Y supply to 220 delta or 220/127 Y, you need a transformer. The motor controller brochure seems to indicate that it can operate on 220 single-phase, but the manual indicates that a different model is required for single-phase. If there are other motors on the machine, they may also require three-phase power.

2012年8月23日 · I want to find out what is the difference between the AC (220 VAC) lines, (phase and Neutral). As I know that the Alternating Current (AC) has no polarity, so why do we have a "phase" line and a "Neutral" line ?! Why one of them (the phase line) would make danger on human if touched, while the other doesn't ?!

If you select a universal input 110-240V switching power supply as opposed to a dual input (typically 110-115 and 220-240) that uses the expected input rectification it should work out the box. You may need to replace the fuse with a slow-blo type due to inrush current but selecting another specimen may work just fine.

110 V (or 220 V; household voltage pretty much) is dangerous (i.e. can kill you) I think there's consensus on this, no need to try :) 60 V (old telephone lines) is supposedly dangerous (never tried, only heard it once... probably won't try) From what I know first-hand:

2011年7月17日 · I'm using a KSC1173 TO-220 power transistor in a design, and I need to calculate the case temperature for the maximum average power dissipation, to see if the power dissipation falls under the temperature derating curve in the datasheet for a particular heatsink.

If you said 220/440 than it shuld have 127V (start 2), 220V (run2), 254V(start), 440V (run). With a VFD the motor shall be connected as LOWER/RUN 2 delta. EDIT: Some mistakes: If you said 220/440 than it shuld have 380V (start 2), 220V (run2), 760V(start), 440V (run). The black lines rapresent jumper wires that you might see mounted.

2016年6月6日 · I created the following circuit. I plugged it in and it works!! Now I thought of adding an opto-isolator to the circuit in place of the LED. The value of C was the same. $$ X_c = {(({220volts-1.