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The load has not increased. I thought since the impedance stayed the same, the voltage increased so the current woult increase.

Good day I have recommended a motor be swapped with a replacement as the previous design is obselete. There has been a 10 % increase in voltage. The current measurements have also increased, which is expected. Assuming all parameters remain the same, will the power output of the motor change...

Motorspert Yes. I have spoken to the manufacturer, who also pointed out the clogging of the vents. There are no leaks or cracks yet. This has been confirmed by inspection and pressure tests. What are the effects/risks of thermal problems? (mechanical and electrical) I will try to get some...

Good day After an inspection of our 660 MW generators, it was found that the rubber supports for the cooling fins are coming loose. These enter the gen air gap and I have found fraying rubber between the casing and inner frame. I am concerned about the risk these rubbers pose both mechanically...

Good day One of our generator rotors have a cracked pole to pole connection. 1.What does the pole to pole connection do? 2.What are the consequences/risks of this? 3.Is there any way that we can monitor this? 4.Will this effect the performance of the generator? Thanks in advance for any...

Hi Could someone please explain the phenomenon of pole slipping in synchronous generators? What exactly is it and what causes it? Thank you in advance.

Good day I am busy testing a 6.6 kV, 1 MW, 121 Amps AC motor with no load. I am interested to know what no load current should I expect? What % of full load current is expected and will it reach full load current? Thanks in advance.

Good day I am an elect. engineer who needs some help understanding bearings for motors. What are the different bearings available, in particular what is the difference between roller bearings and white metal bearings and sleeve bearings? What maintenance needs to be done on each of these...

Hi How do I test a thyristor/diodes? Can anybody suggest a maintenance interval/strategy for a thyristor operated device? I am interested in a generic output waveform expected from a thyristor. Can somebody please explain the concept of the firing angle and how it affects the operation of a...

the fuses are used not for lighting. the problem in particular occurs on the circuitory for an AC lubrication oil pump (for the turbines). the fuses are warm in normal operation. voltage is a 380V supply. no equipment has been installed I am currently monitoring the problem

Good day A number of fuse failures have being occuring on our plant. I have checked the tightness of the wires/connections. They seem to be in good condition. Properly rated fuses are being used. I have a concern that most of the failures are occuring on the supply side. What could I look at...

Hi guys I am having difficulty in understanding basics. I need to use a resistor in a circuit. The voltage and current ratings concepts I understand. The confusion arises when looking at the power rating ( watts). How do I detemine the power rating required? What factors should I consider...

Hi Can somebody please explain me the difference between VSDs and soft starters? Will a softstarter cause a motor to trip while the motor is running? How can I check if a soft starter is faulty?

When considering replacing the coils on a solenoid what factors do I consider? Is there a difference between the resistance of an AC and DC coil?