Hi Craig . . . I would like to add a big red safety STOP mag switch with the VFD I am installing on a bandsaw (1.5hp / 220V 3P) to run off 220/1P. I can place it between the source and VFD or between the VFD and motor. Any recommendation on which method is best? Thanks, Dennis
Hello, I also have an SP81 miniaturung, it has a 0.37 kw / 380 motor and I want to put a converter on it to go to 220v. Could I put a converter of 1kw or more on it?
Something I’ve never really found much information on is what type of 3 phase motor works or doesn’t work with a single phase VFD. Does the motor have to have a 240v configuration on the ID plate to be compatible? Would a 400 odd volt three phase work with a single phase vfd?
I have a VFD drive thats running a 5.5 kW motor with solar power, it also has terminals for AC input. can I use a 7 KVA generator to run this motor? My purpose here is just to overcome the starting torque so that i dont have to buy a bigger generator?
Hi Sir, Can I use the VFD as below:- 1. Input - 415V 50HZ 8.3V/Ph 2 Output - 460V 60Hz 7.8V/Ph 3. For centrifugal pump Does it affect the life span of motor or VFD. Kind regards Ray
Our electrical characteristic is 415V 3Ph 50Hz. Can I run a 60Hz 440-460V motor with VFD (input power 415V 3Ph 50Hz). or I need to add transformer to convert the electrical characteristic to 460V 3Ph 60Hz before VFD Input. Kind regards Ray
In the video he said all "VFD are constant T", if I am spinning a motor in a fluid would I have to set the T on the VFD before I start my process? Kind regards
Ryan, I am not sure what you are asking. The overload rating is not a setting, it is a specification of the VFD. Can you elaborate your question? If you have questions about programming, we have a few other videos showing how to program a VFD. In those videos, we used all Mitsubishi VFDs, but the parameters you need to set are the same.
Hope you can give me an answer. I have a compressor I want to run and may later up the size to a high rated one. Can I go over sized and not mess things up or?
An oversized VFD is fine, the same way it's fine to plug a 10A load into a 20A circuit (the AC power feed from the wall to the VFD will need to be rated high enough for the load applied, 2X the 3-phase current). Other way around (20A load on a 10A circuit) won't work.
hello, i have a question sir. i have a problem in my circuit breaker. it is installed after after a vfd drives and it always tripp when it runs for a few minutes even w/ a normal current. what does it cause to trip? thanks.... can you give me some idea why my breaker trips when installed after a vfd drive? thanks..
its application is in Food Manufacturing. SILO process sir. the set of it is one vfd driving a two rotary valve motor and it is design by Guerin. The circuit breaker is in standard size, phase current is normal if we check. we always change circuit breaker according to designer advice but still re-occurrence of happen. i am wondering why, the circuit breaker is new, new motor, normal phase current but circuit breaker always becoming hot. VFD with two circuit breaker which command two motor for transferring of product in a chute or pipe.
+ian jemar Yu We would recommend having a certified electrician to install this for you. It is very likely that the circuit breaker is not the right amperage rating (what I was referring to earlier about size. It is likely too low). The amperage rating of the breaker needs to meet your national electric code.
Just looking at the amperage, yes, you can use a 8.2A drive on a 7.5A motor. But other factors such as attitude, ambient temperature, and the type of application will make a difference also.
Hi Sir, Attitude - Unknown ambient - Max 40 deg C Application - Booster Pump Is it ok ? Does it help if I prolong the time (20-30seconds) to full speed. If the VFD is undersize, will it damage to my VFD or only tripping ? Kind regards Ray
Ray, you can set the acceleration time to 20-30 seconds, but we do not recommend using an undersized VFD. The diodes in your VFD may be permanently damaged when operating a larger motor.
Application : Pump Motor : 1HP 2Pole 3Ph 50Hz FLA 1.7a Driver : FLA - 0.7a to 3.0a (Default at 2.5a) The input amp and output amp from drive rating when i run motor at 5hz - __ / 1.7a 25Hz - 0.3a / 1.7a 30Hz - 0.4a / 1.7a 50Hz - 1.7a / 2.5a Kind regards Ray
Hey Matt, you will have to derate the drive to make it work. If your motor is rated for 5 amps, you need a drive with 10 amps or more. Make sure there are nothing (switches, lights, etc.) between the drive and the motor. Put them after the motor or on a different circuit if you can. Hope that helps!
+VFDs.com Ok, so here's the thing, I have some shop equipment that I bought that is 480v 3 phase, all I have is 220v. So if I add a transformer to bump it up to 480 and then add a a vfd that is rated at twice the amps to that my motor needs I should be good? The vfds I see all say 480v 3phase input. Thanks for the reply!
Matt, If you have 1 phase 230V power and 3 phase 460V machines; yes, that will work. The transformer will convert 1 phase 230V to 1 phase 460V. Then you can use the VFD to convert 1 phase 460V to 3 phase 460V. Here are a few things you should beware of: (1) this is the arrangement you should have: Power from the wall > transformer > VFD > motor (2) if your transformer is big enough, you can use it with multiple VFD & motor setups (3) again, nothing in between the VFD and motor Let me know if you have other questions!
Well, got a good deal.. You know how that goes.. I paid one price for everything in the garage. Only the Cincinnati buffer is 480v I don't have to have it working, but it would be nice.
Hi Craig . . . I would like to add a big red safety STOP mag switch with the VFD I am installing on a bandsaw (1.5hp / 220V 3P) to run off 220/1P. I can place it between the source and VFD or between the VFD and motor. Any recommendation on which method is best?
Thanks,
Dennis
Hello, I also have an SP81 miniaturung, it has a 0.37 kw / 380 motor and I want to put a converter on it to go to 220v. Could I put a converter of 1kw or more on it?
Something I’ve never really found much information on is what type of 3 phase motor works or doesn’t work with a single phase VFD. Does the motor have to have a 240v configuration on the ID plate to be compatible? Would a 400 odd volt three phase work with a single phase vfd?
I have a VFD drive thats running a 5.5 kW motor with solar power, it also has terminals for AC input. can I use a 7 KVA generator to run this motor? My purpose here is just to overcome the starting torque so that i dont have to buy a bigger generator?
Sometimes the noise of the motor fed by a VFD can be objectionable, then we gotta increase the switching frequency but it comes with a derating.
Hi Sir,
Can I use the VFD as below:-
1. Input - 415V 50HZ 8.3V/Ph
2 Output - 460V 60Hz 7.8V/Ph
3. For centrifugal pump
Does it affect the life span of motor or VFD.
Kind regards
Ray
Ray, I am not understanding your question. What is your input power, motor, and VFD spec?
Our electrical characteristic is 415V 3Ph 50Hz.
Can I run a 60Hz 440-460V motor with VFD (input power 415V 3Ph 50Hz).
or
I need to add transformer to convert the electrical characteristic to 460V 3Ph 60Hz before VFD Input.
Kind regards
Ray
Ray,
You can get a 460V, 3Ph VFD for your setup. You don't need the transformer. The VFD will run at 60Hz at 440-460V.
Dear Sir
I have inverter 200 kw can I use it with motor 250 kw ?
Application :main motor for plastic extruder
In the video he said all "VFD are constant T", if I am spinning a motor in a fluid would I have to set the T on the VFD before I start my process?
Kind regards
Ryan, I am not sure what you are asking. The overload rating is not a setting, it is a specification of the VFD. Can you elaborate your question? If you have questions about programming, we have a few other videos showing how to program a VFD. In those videos, we used all Mitsubishi VFDs, but the parameters you need to set are the same.
Hope you can give me an answer. I have a compressor I want to run and may later up the size to a high rated one. Can I go over sized and not mess things up or?
An oversized VFD is fine, the same way it's fine to plug a 10A load into a 20A circuit (the AC power feed from the wall to the VFD will need to be rated high enough for the load applied, 2X the 3-phase current).
Other way around (20A load on a 10A circuit) won't work.
hello, i have a question sir. i have a problem in my circuit breaker. it is installed after after a vfd drives and it always tripp when it runs for a few minutes even w/ a normal current. what does it cause to trip? thanks.... can you give me some idea why my breaker trips when installed after a vfd drive? thanks..
+ian jemar Yu Hello Ian, what is your application and is the circuit breaker sized properly?
its application is in Food Manufacturing. SILO process sir. the set of it is one vfd driving a two rotary valve motor and it is design by Guerin. The circuit breaker is in standard size, phase current is normal if we check. we always change circuit breaker according to designer advice but still re-occurrence of happen. i am wondering why, the circuit breaker is new, new motor, normal phase current but circuit breaker always becoming hot. VFD with two circuit breaker which command two motor for transferring of product in a chute or pipe.
+ian jemar Yu We would recommend having a certified electrician to install this for you. It is very likely that the circuit breaker is not the right amperage rating (what I was referring to earlier about size. It is likely too low). The amperage rating of the breaker needs to meet your national electric code.
If someone would like to continue learning about VFDs and get some practice with sizing drive systems, try the DriveConstructor online course
Hi Sir,
Can I use a VFD Drive (3.7kW) 8.2Amp on 4kW (7.5amp) Motor ?
Kind regards
Ray
Just looking at the amperage, yes, you can use a 8.2A drive on a 7.5A motor. But other factors such as attitude, ambient temperature, and the type of application will make a difference also.
Hi Sir,
Attitude - Unknown
ambient - Max 40 deg C
Application - Booster Pump
Is it ok ?
Does it help if I prolong the time (20-30seconds) to full speed.
If the VFD is undersize, will it damage to my VFD or only tripping ?
Kind regards
Ray
Ray, you can set the acceleration time to 20-30 seconds, but we do not recommend using an undersized VFD. The diodes in your VFD may be permanently damaged when operating a larger motor.
OK, noted.... Thanks a lot...
can i run vfd by applying dc power to the brake terminal and switching off the 3phase input power
No
Run, no. Probably destroy, yes.
Application : Pump
Motor : 1HP 2Pole 3Ph 50Hz FLA 1.7a
Driver :
FLA - 0.7a to 3.0a (Default at 2.5a)
The input amp and output amp from drive rating when i run motor at
5hz - __ / 1.7a
25Hz - 0.3a / 1.7a
30Hz - 0.4a / 1.7a
50Hz - 1.7a / 2.5a
Kind regards
Ray
hi.can I use 3kw motor(i=11.4) with 3kw vfd(i=8.5)? thank you
Ehsan, what is the amps on the motor? What is the "i" that you are referring to?
VFDs.com
hi
amps of the motor is 11.4 .I read it from name plate.
thank you
Ehsan, you will need a VFD with 11.4 or higher amps.
VFDs.com Thank yo so much for support
You are welcome!
Is there a drive that will do 480v single phase input to 3phase output?
Hey Matt, you will have to derate the drive to make it work. If your motor is rated for 5 amps, you need a drive with 10 amps or more. Make sure there are nothing (switches, lights, etc.) between the drive and the motor. Put them after the motor or on a different circuit if you can. Hope that helps!
+VFDs.com Ok, so here's the thing, I have some shop equipment that I bought that is 480v 3 phase, all I have is 220v. So if I add a transformer to bump it up to 480 and then add a a vfd that is rated at twice the amps to that my motor needs I should be good? The vfds I see all say 480v 3phase input. Thanks for the reply!
Matt,
If you have 1 phase 230V power and 3 phase 460V machines; yes, that will work. The transformer will convert 1 phase 230V to 1 phase 460V. Then you can use the VFD to convert 1 phase 460V to 3 phase 460V. Here are a few things you should beware of:
(1) this is the arrangement you should have: Power from the wall > transformer > VFD > motor
(2) if your transformer is big enough, you can use it with multiple VFD & motor setups
(3) again, nothing in between the VFD and motor
Let me know if you have other questions!
You should also look at the overall cost, to see if it is worth getting new machines that are 230V instead of the transformer.
Well, got a good deal.. You know how that goes.. I paid one price for everything in the garage. Only the Cincinnati buffer is 480v I don't have to have it working, but it would be nice.
good job ..thank you
Very nice
I learned nothing