In a situation where the busbar capacitor motor no markings, it is very difficult to distinguish it from the operating winding of the same mind on the starting coil. They can learn to distinguish between any user who knows the characteristics of each of the conductors (its color, cross section and other parameters).
Example for inspection
As an example, consider a single-phase capacitor motor KD-25-F4, 220 volts for up to 1350 revolutions / minute. Its capacity is 25 watts, and V4 - is an icon indicating the climatic performance.
With the appearance of the motor unit can be found on the following photo.
It shows that any labeling in all working wires entirely absent. However, the motor tag states that according to the current standards of the working coil wire must be insulated red, and start winding wires - blue.
visual method
The first thing to try to find the differences between the coils visually (the cross section of the wires).
Reasoning logically, we can assume the following:
- when the current in the starting coil of the motor is started is multiplied;
- that it is not overheated or burned - its wire must be thick enough;
- in any case, these strands thicker tires working coil operated under normal conditions.
When visual inspection is enough to select a pair of wires with a large cross section, which are the starting coil. In this conductor with a smaller cross section belong to the working winding. It is quite another when the difference in their real-sections is almost invisible to the eye (as in the case of this engine).
Resistance Measurement Method
Of Electrical known that the larger section of the electric conductor - the less ohmic resistance. Therefore, to find differences in the two windings can be achieved by measuring the reverse conduction (pictured below).
Note: In these tests, at the same time the integrity of the two windings.
For these purposes require any multimeter having a resistivity measurement mode.
If any procedure is as follows:
- First, in the "ohms" take two bare end of the motor and producing measured resistance therebetween.
- If the device shows "1" - this means that the selected coil ends are different and need to replace a single wire.
- After changing its possible repetition of the previous situation (this means that the selected conductor also belongs to the other coil).
- If the selected two ends of the coil - the device will show some resistance (300 ohms, for example).
- Then you need to mark the identified leads and measure the resistance between the two remaining (presumably, it was found to be 129 ohms).
Upon completion of the measuring operation must proceed to analyze the results. It is understood that the greater resistance of 300 ohms and 129 ohms, it indicates a wire with a smaller cross section (at working coil). The winding with the indicator 300 ohms may be nothing more than a trigger (pictured below).