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I can only guess 65 V on open delta at secondary of voltage transformers ..

It seems that someone brave simply need to pull out the 2.2 mm shimps from the lower pole and insert it under the upper one. But that is not case because sometimes it is important disposition of shimps respecting they are made of magnetic or non-magnetic material. Good luck

I was on the road and did not provide minimum information related to my question It's about 6kV ,3,5MW motor that was talked about a lot and it was used to drive the fan . Link Now it is considers that this motor should be used to drive one pump where we have motors with same voltage and...

Hello everyone , I recently saw at manual for Westinghouse High voltage motor that as starting method was given soft starter only . In your opinion, what should be structural difference compared to the motor with a DOL start .

TT , A good question for maintenance is whether someone has been working on something at high voltage and whether there was perhaps a phase change and consequently change direction of rotation of the motor.

T247 Can you measure resistance of the rotor windings .

Is there a time delay between the release of star contactor and activation of delta contactor. Often, a small time delay is solution to solve problem if large currents occur at that moment . Since the motor was replaced, winding connection should definitely be checked . Good luck .

You should look at the expected starting current of the motor, bearing in mind that newer motors with improved efficiency have a higher starting current of 10 IN. Then this four-pole distribution switch could be tripped by its characteristic .

If motor or the machine it drives has special requirements related to the low level of vibrations, there is no reason to think about balance rotor or not. For example these are definitely motors from a grinder machines. Perhaps power of the electric motor and its speed can be a good...

Gr8bly, I saw intention of a colleague to solve power supply of the DC motor with only two wires, and I remembered that I had seen such a solution, but my comment is not an obstacle for this DC motor to be solved that way. Good luck

Nick , On question Can I connect the cable only to the terminals A1(+) and D2(-)for clockwise rotation and the terminals A1(+) and D1(-) for anti clockwise rotation and leave the terminal F1/F2 without connecting any cable. In some applications and DC motor where armature and excitation...

On the other hand, after 10 years initial failure of the device start to occurs and you run into a problem because there are no spare parts or original VFD , softstarter to replace. In some countries, there is a lack of technical support, so you should think carefully if someone suggests...

How high is measured temperature on other sensors .If is diference is big probably RTD is bad .

Gudz , In older installations, there is often a resistor in the series with DC coil circuit that reduces the current when the brake is applied .Maybe it's giving you a headache . Good luck

Did you have a good reason to check the resistance or was it done in regular inspections. If there is no bad commutation or any problem, it is a weak reason to think about rewinding. What is the motor power?

Sori , I am interested in the price of the taken reactive energy for your factory and positive results of converting a synchronous motor into condenser . Often the price of reactive energy is low in relation to the active power you have to use to idle the synchronous motor and there is no...

Melco , it depends of technological process and how important is the operation of the motor i.e. the pump, if voltage drops on High voltage sistem . In this way, you determine which of the pumps must work for example at 80% of the voltage and which should be turned off and save proces...

FHAvant , There was often a question on the forum. The easiest way is to apply some less or all 50 V alternating voltage to the excitation winding and then measure voltage on the brushes. By moving the brush holder, the voltage should be set to almost zero . It seems to me that maybe when...

NHAvant, do you have possibility to move the brush holder and check if it is a good neutral zone .

I guess is problem with firmware of new isntaled AMC board. The problem with spare parts for ABB regulators is that even if you have a suitable new part supplied by them someone has to match the software versions