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How can we reduce the current of 200kw motor on yaskawa A1000 drive

We are using the 200kw VFD, A1000 of yaskawa make, so how can we reduce the current of the motor

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SOURCE: can you sand me yaskawa F7 VFD manual

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Posted on Apr 07, 2011

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When i turn on the drive it display it display code for ground fault. my wiring are correct. And i cannot use keypad of drive. how can i resolve the fault .


why cant you use the keypad/'display of drive, is it not lit up ? if so you most likely have a grounded phase on the load side (motor) I suggest disconnecting motor completely and measuring to ground with a high voltage tester (megger) if you have a phase to ground then all the power that drive puts on that wire will shunt to ground , causing infinite current , this will affect the power supply of drive and not allow drive to even power up correctly
also you failed to mention if motor was 3 phase if so , some drives require installer to remove shunt jumpers (see install directions) this will "Lift" the surge suppresors off earth ground and over to "virtual" ground that occurs at center of three phase power , this might be seen as a ground fault if this is not done correctly

Jun 12, 2015 | Delta Vfd750b43a Ac Drive Vfd B Inverter...

1 Answer

Problem With Eaton 9000x VFD drive. All voltages are good. Cannot get drive to activate motor.


Check the windings of the motor at the VFD output. Start by killing power to the VFD. Next, check for voltage on L1, L2 & L3 and U, V & W line to line & line to ground. If all indicate zero, connect an ohm meter from U to V, then V to W and finally W to U. You should see a very low resistance - single digit ohms. They should all be the same value. If that check so out, test from ground to: U, then to V and finally W. This should indicate a very high resistance - 1 meg ohm or more. Do NOT attempt to use a megger to measure ground to U Vand W while connected to the VFD terminals! Low numbers indicate that the insulation on the windings inside the motor are breaking down, and some current is flowing in the ground wire which is dangerous. If all these checks are ok, the likelihood of the motor being to problem is minimal. You should be able to start / run the motor without damage to it at full line voltage - assuming it can start the load at full speed - and that the load can be safely started at full speed. If no to those questions - you should decouple the motor from the load before proceeding. Next, try running the motor "across the line". Many VFD provide such an option and call this "bypass mode" or sometimes "Manual"

Doing this will cause the motor to appear across the *full line voltage* and the motor will attempt to come up to 100% speed *as fast* as it possibly can. If the motor starts & runs, the issue is related to the VFD itself. You may have a loose control wiring, open input / output fuses, etc.

Review the manual with your options, here.

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What is the variable frequency drive?


VFD is a device used for speed control of 3ph induction motors & automation process control

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2 Answers

My yaskawa f7 inverter has PG open problem


Replace either the inverter if bad or the microwave itself.

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1 Answer

Were can i find delta vfd at dubai


Official Agents for Delta Electronics (VFD, PLC, Servo Motor, Servo Drives, Temperature Controllers, Communication modules and devices) in UAE, Dubai is ARPI Industrial Equipment.

Check the website.
http://arpiie.com/index.php/motorsdrives/acdrives

Nov 14, 2011 | Delta Vfd750b43a Ac Drive Vfd B Inverter...

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Bouncing drive


Control problem or parameter setting is wrong. What type of control are you using, what application is it for?

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