Q:I have the 24V switch power outlet end of "+" and "-" two, the voltage between the two is 24V, connected with the electrical components of the loop, which "-" it is necessary to connect with the cabinet ground (that is, ground wire) connected? What's the difference between grounding and ungrounded? What kind of influence does the two kind of situation bring to the electric appliance in the actual use? Please help me master the answer!

This line can connect to the ground. If your cabinet is earthed, this line can be connected to the casing. This line with the earth's role is to prevent differential mode interference. If your device is used in a relatively disturbed environment, such as a large generator around it, this line is best grounded. I have encountered this kind of problem in actual engineering. The power supply above the tower crane is not grounded. When the tower crane is working, especially the switch is used, the contact switch is not the time of the solid state relay. The video monitor system restarts or crashes when the disk is frequently dropped.

Q:How to choose UPS power supply for industry?

UPS power battery size determines the load power supply time, concrete is according to the needs of the load to be, for example: if the injection molding machine you need to supply 1 hours to ensure the normal stop at power off, then our battery size depends on the battery matching the appropriate injection molding machine power the size of the UPS power group, 11, UPS battery, can also have their customers to buy.

Q:Is the switch power supply for industrial instrument power good or transformer good?

The guy upstairs wrong, 1: switching power supply unless the resonant switching power supply is more expensive, otherwise it's interference than the general circuit transformer is composed of the bigger, you go to see the high-end audio switching power supply (why not have a dedicated, open loop resonator) 2: the so-called "lightning protection switching power supply the) is only one or two varistor in parallel with the input end of the lightning lightning to see what kind of way, limited function, little difference between this and the transformer, the transformer and the posterior pole voltage stabilizing circuit. The output voltage of the transformer is AC 3, want to get stable DC voltage output circuit must be added, so the voltage is more stable that depends on your components and circuits, switching power supply transformer must be better than not good.

Q:What is the allowable fluctuation range of industrial standard 380V power supply voltage?

The voltage fluctuation range is as follows:The sum of the positive and negative deviations of the supply voltage above and above the 35kV shall not exceed l0% of the nominal system voltage. Note: if the electric voltage is up and down, the same number (all positive or negative), the absolute value of the larger deviation is used as the basis of measurement.10, kV and below three-phase supply voltage deviation is nominal system voltage, taxi 10%.

Q:What is the concept of switching power supply in electronic circuit single chip microcomputer? What's the use of industry? What is the working principle? Must adopt

A variety of switching power supply, its working principle is not the same, but the fundamental principle are basically the same, namely: switching power supply is the use of electronic switching devices (such as transistor, FET, SCR thyristor, etc.) through the control circuit, the electronic switching devices constantly "on" and "off" so, the electronic switch on input voltage pulse modulation device, so as to realize DC/AC, DC/DC voltage, and output voltage adjustable automatic voltage regulator.

Q:What are the types of power used in industrial UPS? What type of UPS power can take the place of it?

OUTPUT:208/220/230/240V, 50/60Hz1000VA/700WThe AC output voltage is the power frequency 220V voltage, and the device with the power 1000VA can be considered,To replace it, a lot more, Santak's UPS can be, the key is how long you want to spare time, batteries should not buy again?.

Q:Which brand of industrial switching power is good, including imported, not modular power?.Refuse advertising

What size do you want? I imitated HUAWEI, and it used more in domestic telecom. There is also a Hefei, the quality is good, forget the name.

Q:Why is the power supply of industrial control system mostly DC24V? Why not 17V? 11V?

At the same time can reduce the current power, and is a common multiple of the majority of the 24, the standard of course should be considered and a variety of battery, either 2V or lead-acid batteries commonly used 1.2V, 1.5V and 3V batteries are good combination. With a series of standards, it's good to swap everything at the critical moment.

Q:What is the difference between computer power supply and industrial switching power supply? My points run out, thank you enlighten prawns. Thank you

The working conditions of industry are poor, and the temperature is too high. The computer power is slightly lower. Almost anything else

Q:Which is better to use TL494 and UC3842 as industrial power source? Mainly in terms of stability and efficiency!

UC3842 I'm using this for switching power supplies 1000W-2000W recommends full bridge with TL494.