Floatless relay 110V 220V 240V

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Q:Switching power supply positive circuit, please help explain,
Very simple reason ah, switch tube conduction time, NP winding voltage, current is on the positive negative, while the secondary NS voltage is also under the negative, to the load power supply, and NR winding voltage is negative, due to Diode DR one-way conductivity, NR winding no current. This stage of the NP winding magnetizes the core. When the switch off, the winding voltage polarity are reversed, NP, NS winding no current, and NR winding (voltage is negative) through the power and DR to form a loop, the winding current is negative, to the Core demagnetization, while the energy back to the power supply (to the power supply filter capacitor charge), but also to prevent the NP winding to produce too high anti-peak voltage breakdown of the switch tube, serve three purposes.
Q:IPad often switch machine for a long time, will not be a hardware problem
I started from the iPad2, play to the iPad Air, never out of the hardware failure. And the people around the iPad have not heard of the problem. It should be said that the quality of Apple iPad said no say.
Q:Summer refrigerator external thermostat switch machine time how to tune
Refrigerator using external temperature control is generally adjusted to start 20 minutes, stop 40 minutes for the best, but also according to the actual situation of refrigeration may be, if the cooling is not ideal, it is recommended to increase the start of the appropriate time to not exceed the time As a reference value
Q:If there are three lights can use a microcomputer when the control switch to the different time
Only in this way, it is best to buy three for each one. Hope it helps you.
Q:How close to the switch + time relay + solenoid valve
That is, often open contact or closed state, that is, the circuit can not stop and continue to restart the delay operation (has been experimentally confirmed).
Q:Germany Germany West KG316T time control switch how to set the system time?
To set the system time method: such as to set, while holding down the clock +, the non-stop by non-stop beating time, minutes and week is the same way to operate!
Q:Refrigerator outside the regulator how to adjust the shutdown time in summer
This should explain some of the above, you look at it, or Baidu look
Q:Street lights off the light time with light control time switch which is good
Light control advantage is based on the strength of the light on the road to determine the light is not bright, sometimes even during the day because of rainy days, the road light is low,
Q:Can the computer always turn on the machine? How long does it take to switch the machine once?
Do not sleep often, sleep some programs may also open the best is to shut down, sleep not too long
Q:The total switching time of the transformer on-load tap-changer is probably how much
The total switching time includes the excessive time, the excess time means that the on-load tap-changer switches from one splitter position to another splitter gear has an over-process, similar to the semi-detached state.

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