Q:Why can't autotransformer be used as transformer for safety lighting?

The main and auxiliary coils of the autotransformer have common parts. Once the short-circuit is made, the lighting circuit is directly connected with the high voltage circuit, which is very dangerous

Q:Is the substation separate from the power and illumination transformer?

There is only bus in the substation, and the station is connected with the transformer from the bus. If there is no electricity even in the bus, then the substation should not be considered active.

Q:Why should lighting transformers be used in factories and mines?

In some factories and mines (such as power plants), in order to supply power reliability, the power system is grounded in a three-phase, ungrounded, or neutral manner. In this way, the transformer must be connected to a neutral grounding type with a special transformer to supply power to the lighting.

Q:How to calculate the rated capacity of small transformers for lighting purposes?

But in fact, consider the total load, the importance, the location of the machine, and the future additional plan, according to the following order.

Q:Does the lighting work properly? Doesn't that power equipment start voltage unstable?

Power lines and lighting lines are connected to the same transformer, without affecting the use of a transformer power users, lighting and power are connected together.

Q:Line lights, lighting transformers in use!! Can live line work?!! Be afraid of electric shock 40

I don't know how much the output voltage of your transformer is, but the internationally accepted voltage below 36V is the voltage that is not harmful to the human body

Q:Please tell me how to calculate the transformer in the lighting circuit of elevator shaft in building electrical design

Because of the brightness of the 36V safety voltage lamp brightness in the overhaul work is not enough, so now the well lighting design should not be 36V, and replaced by 220V, and only need to add a leakage protector on it.

Q:Can the 500 volt lighting transformer be changed into an electric welder?

The no-load voltage is higher (about 70~90 V), the arc can be smoothly started, and the voltage will be reduced to about 30 V when welding.

Q:The difference between lighting transformers and control transformers

The lighting voltage is 36 and 12V, the signal lamp is 6V, the control winding is 127, 110V, the one or two insulation, and the two one is grounded.Simple lighting transformers, the two voltage is not so diverse.

Q:Why the 21 lighting transformer must double winding type safety isolating transformers, prohibited the use of autotransformer.

Double winding type safety isolating transformer load end and the power supply terminal is not connected, is safe, and autotransformer primary winding of a share, it is directly connected with the power supply end of the power, not safety.