How can a low field current drives the motor to a 200% stator current?, looking the "V-curve" for this motor with a field current arround 0,33A we have a stator current like 270A, also with a field current about 5,38A the stator current go to 4A, with field current = 6,15 the stator current goes...
Hi I´m working with a 9600hp 40 poles (180rpm) sicnronous motor with a brushless exciter.
My question is: is possible to drive this motor to a extreme condition of 200% of nominal current and 160rpm by increassing the exciter volt?
This was a real condition, and I´m trying to figure out if the...
Hi, I´m doing the eletrical project for a 300hp belt conveyour motor. It will work wiht a VFD that have to supply 140% of motor start torque. My question is, how can I define the right power conductor for this application since we have 450mt between the MCC and the motor. I´m looking for my...
The great concern is: how prevent the motor blow again, and also define who will pay the motor repair. Tomorrow we will start this repaired motor uncoupled, I will take the current vs time graphic and probably next Wednesday we will start this motor with load.
I have read something about the...
According the motor specification. This motor was projected for a direct start. The start torque is 260% and the start time is 0.5sec!!!
So that the combination of high start torque in a very short period (0.5sec)will explains the short locked rotor time.
Maybe for this motor the minimum time...
Thanks, I´m trying to do an inquiry about this damage, I´m quite sure that the problem was due the consecutive starts, but I want to be sure that the ANSI protection N 66 (consecutive starts) becomes a critical issue when we work with motors with a very short locked rotor time.
Hi,
I´m working with a motor that blew during commissioning.
this is a 1000cv@4000Vac motor with a locked rotor time = 3.5sec.
According the vendor recommendations, we can do 3 starts per hour: one start each 20 minutes.
According the relay records, this motor was started many times in a short...
hi, I have the following problem: I can´t do the comunication between one temperatura transmitter and the PC to to the calibration. I´m usin a raytek infrared transmitter I believ that the problem is on the DB25 to DB9 adapter, Where can I find the pin configuration for this raytek hart adapter?,