I agree with Parchie about the backing media being able to drive the motor back and create a stall situation .
Infact I too have experienced situation where a severe mechanical shock resulted in twisted and badly damaged the pump shaft .
Jithin please check and let know
1.The parameter...
Manufacturers of DG set say we should not run the dg on no load for more than 10 min.Normally the DG set is run on no load as part of PPM .We had an installation were a timer based interlock was provided to prevent prolonged running on no load.
It is even said that on load the carbon and soot...
Dear Friends,
I have a situation which is similar to the thread 237-443212.Unfortunately the thread is closed.So I am starting a new thread.The motor current 450 KW centrifugal pump ( Cooling tower pump)driven by Soft starter.It takes high current during stopping.The stop (coasting ) mode...
As Marke said,PTC cannot measure the actual temperature.
The insulation class of motor is F.There is two PTC in motor , the PTC which is rated for alarm at 135 DEG CELSIUS read 100 ohms ( all three connected together at TB of motor) and the PTC rated for TRIP at 150deg celsius read 220 ohms (...
Hello jraef,
When the PTC is connected to a voltage source . a large current corresponding to the low ( cold0 resistance flows.But as the motor runs , the thermistor embedded in winding self heats ( thereby increasing resistance)and reducing the current.In the unfortunate incident of fault ...
We need to check the proper functioning of PTC thermistor protection for a 3 phase motor driven by soft starter.The motor name plate says the max measuring voltage of 2.5 volts dc for PTC. However for our application the measuring voltage is derived from the Soft starter and the PTC wires from...
