? 2000?4?12???? UTC
+8??3:00:00?Kirk Lindstedt??? ?You may visit our video on youtube
A variac can only accept AC power input, but with Rectifier installed it ca n switch output from AC to DC.
Variac mainly used as a light dimmer, speed controller , machines for motor test and repair ,experiment machines for teaching or lab test and also ind ustrial use.
Well, some people call it variac and others say variable transformer, we ca n understand from the name that it basicly used to give out constant adjust able voltage. For example single phase input 220v ,the standard output is 0
-250v ,three phase input 380v output 0-430v. Please note that these are jus t standard output ,we can make the input and output range as your needs. For frequency all good to use 50 or 60hz.
First let?s check out the manual adjust type, as we can see it has four terminals on the front panel ,to connect in and output cables. And als o a panel meter that display the output voltage. Which we can also use LCD display. Now on the top of it we can see a black wheel, the output voltage will goes slowly up or down while we rotate it.
Here is a motor drive type, we can see terminals and meters are same but a motor on top instead of the wheel. By using this type you can connect the m otor to a control box to adjust the output from distance, like you can use a 10 meters or 20 meters wire to control the variac in another room. We now have AC and DC motors for option.
Now let?s talk about the fancy motor type. Well we can see those me ters display our output voltage and current. We can control the power on an d off ,up and down by push button switches here. For example if we want the volt up we just press this button and when it reach the volt we can releas e it. The accuracy is 1 volt. Inside is the main switch control the power a nd coils and terminals for cable. Moreover, we install a temperature sensor inside which will cut off the power and make alarm noise when the temp. Hi t 100 degrees.
For all variacs we can do max 1000kva now and we can install a rectifier to make the output switch from AC to DC. For more information please visit our website Electric transformer manufact ure or send me email : snipped-for-privacy@junxele.com