Place meter on ohms: T1 to T2 T2 to T3 T1 to T3 The scope generally expected is.3 to 2.0 ohms, although most are all about. Testing For Open & Short In Motor Winding. Just beware that from 230 meg to 600 meg frequently shows some deterioration in the cables or engine insulation. The above is exactly what I found to be typical for 230 Vac 3 Phase Motors.Д®ven though 230 meg for a 230 Vac circuit appears on the low side from my experience. It can give false and unrepeatable readings causing one to pursue your narrative. Most shorts will be below 20 megohms.Д«e careful not to touch the wires to anything when taking the reading. Readings are often in a variety from 600-2000 Megohms. Ensure that you use a quality meter moving up to 10megohms.ДЄssess all 3 wires separately T1, T2, T3 (three phases) to the ground cable. Many servo motor shorts may be read with a normal quality meter. If it goes directly to the motor and disconnect from the cable and checks the motor and the cable individually.Д«e sure to be certain leads on both ends are not touching anything including the other leads. If itвЂ™s zero or reads some continuity at all, then a problem is present with the motor or cable. Check all three wires singly T1, T2, T3 (three phases) to the ground wire. Testing For Short For Ground With Ohm Meter.ДЈ phase motor winding resistance values, Using Ohm meter: Disconnect all power from the system.

Power factor cos Fi Rotation speed Nominal frequency ДЈ Phase Motor Winding Resistance Value.motor connection) Power of the electrical motor.Motors nominal current (for celebrity (Y) and triangle (D).Motors nominal voltage (for celebrity (Y) and Valve (D) motor connection).About the motors inscription board we can find the most useful information about motor:.ThatвЂ™s why we call them a Three-phase ASYNCHRONOUS electric motor. That is why engine speed is slightly less than magnetic field speed ((3000 rpm - 2800 rpm )). Since the magnetic field must rotate faster than the rotor to induce a voltage in the rotor. Present in a magnetic field creates force. Because the cage is short-circuited, the voltage creates a flow of electrical current.

Rotation magnetic fieldвЂќ reducesвЂќ squirrel-cage, where it induces a voltage. 3 stages generate a turning magnetic field so we donвЂ™t require a capacitor on the Three-Phase Motor. The stator is used to generate a magnetic field. The stator is made out of iron core and twisting. The rotor is usually made as a squirrel-cage, and it is inserted into the statorвЂ™s hole. Two chief sections of the engine are both rotor and stator. It has quite good efficacy and low manufacture and preserves costs. Thank you for your attention.A Three-Phase Asynchronous Motor is the most commonly used motor on earth. If you have any questions please ask, and i will try to answer ass soon as possible. I hope you enjoined my presentation of rewinding a three phase motor. I took all electrical equations and orientation tables from book: Neven Srb ELEKTROMOTORI If we compare all data we can see that motor isn't bad at all. In second line is measurement at 380V and third line at 400V. In upper table there is data from manufacturer in first line. Motor was made for voltage 380V, but now we have 400V in EU. I made all tests with two different voltages. But in next measurement we can see that resistances do not dramatically affect on electric motors performance. You can se that on measurment of resistance where, winding resistances aren't identical. Because gap between stator and cover was very small, i decided to do a little bit bigger first coils, and a little bit smaller last coils. This time winding was too big and i couldn't close the cover of motor. Then i decide to make bigger one but i found problem again. I couldn't access to them because other winding were too small. First i made coils too small, and i couldn't insert last coils in slots. I had a lot of problems with winding new winding too. I had a lot of problems with calculation but i solved them and i got same parameters of winding as were on old one. Most time i spent on calculation of new winding. It took me about a week to rewind this motor.

3 phase motor winding resistance chart