3 phase converter help needed please

Advert

New Replies

Report Bug

Help/FAQs

3 phase converter help needed please

This topic has 41 replies, 11 voices, and was last updated 6 October 2018 at 10:23 by George Jervis.

Viewing 25 posts - 1 through 25 (of 42 total)

1 2 →

Author

Posts
22 September 2018 at 11:28 #372690
George Jervis
Participant
@georgejervis86082
Hi everyone,

I'm looking for some help we a 3 phase converter I've been given a while ago, and never used a 3 phase converter before I'm puzzled on how to set it up to run?

I have a small horizontal mill which was on single phase and decided to buy a new 12hp 3 phrase motor to go with converter (the motor company helped to make sure I had the correct motor for the converter) so I can better control the cutting speed, instead of having to mess around with the rats nest of pulleys every time I wish to change speeds.

My issue is i have no information/instructions on how to get the inverter to work or how to set the parameters? A electrician friend helped me with the wiring installation so that been done correctly.

Would any kind more knowledge person be able to help please, I'm fairly new to the forum but I've managed to put some pictures in a album

Many thanks in advance

George

Edited By George Jervis on 22/09/2018 11:50:39
Advert

22 September 2018 at 11:28 #31975
George Jervis
Participant
@georgejervis86082
3 phase converter help needed please
22 September 2018 at 11:38 #372692
Speedy Builder5
Participant
@speedybuilder5
What sort of phrases did you want to convert – (Tongue in cheek)
BobH
22 September 2018 at 11:50 #372696
Martin Cargill
Participant
@martincargill50290
A quick google found the manual I didn't download it but it will probably have a "quick start" guide. The manufacturer will have a technical helpline that should give you assistance with parameter issues.

Martin.
22 September 2018 at 12:57 #372700
not done it yet
Participant
@notdoneityet
George,

The first thing to do is check that the motor is wired for delta and not star. The VFD factory default settings should be good, as a starting point, to get running. Remote starting and stopping is usually a more advanced set up, as are individual trip settings for your particular circumstances.
22 September 2018 at 13:08 #372703
George Jervis
Participant
@georgejervis86082
Hi
The motor company told me to change the jumpers to DELTA configuration as they were sold in star originally, so I’ve changed them to DELTA before wiring everything up
George
22 September 2018 at 14:41 #372713
David Jupp
Participant
@davidjupp51506
Manual is available from Schneider

**LINK**

Not the most user friendly of manuals, but being a fairly old design there aren't many options to worry about. Unusually this device doesn't have run/stop buttons on the front, so switches of some kind will have to be wired.
23 September 2018 at 13:05 #372856
George Jervis
Participant
@georgejervis86082
Hi
I’ve managed to print out a copy of the Manuel and followed it best I can but still no joy it seems like the parameters are locked and can’t be changed? So inputting the motor plate info can’t be done? I checked the wiring again today that’s okay. The motor is brand new from “the motor company” aka (TEC) which are about a miles ish from my home so no postage to worry about damage.
Has anyone got any ideas please

George
23 September 2018 at 13:47 #372871
Gary Wooding
Participant
@garywooding25363
Are the parameters locked even though the L2A parameter shown on page 56 is set to Yes?
23 September 2018 at 13:49 #372872
not done it yet
Participant
@notdoneityet
Two of my inverters, I think, have one particular program setting number which locks, or unlocks, the programming – to avoid individuals, on the shop floor, tampering with the settings. I think that setting could only be accessed, on one VFD, after the it was left unpowered for some time. I can’t remember the Schneider manual as I didn’t really need it – that VFD had failed, probably due to old age.
23 September 2018 at 13:50 #372873
David Jupp
Participant
@davidjupp51506
p. 53 onwards of the manual covers parameters modification and gives some examples.

ItH should be set to nominal motor current (for thermal protection), take from motor plate.

bFr set to motor base frequency; 50 or 60 (almost certainly 50)

The setting method is very clunky, so read the examples carefully. ItH & bFr are both level 1 parameters.

You can define some preset speeds to call depending on switch positions. LSP, HSP, JOG, S3 S4.

All these are 'Level 1' parameters, so follow examples / flowchart for level 1.

Since you have a 0.37kW motor and a 0.37kW drive the factory default settings for motor should be reasonable – if in doubt you could perform a FCS (a level 2 parameter).
23 September 2018 at 15:59 #372897
Martin Cargill
Participant
@martincargill50290
From your photos it looks like the drive is ready to go ( the RDY on the display). To give further assistance:

Can you photograph the wiring that you have going into the drive.

A photograph of a sketch of the wiring would also help.

Also a list of the parameters and what you have them set to would also help

Martin
23 September 2018 at 16:48 #372907
George Jervis
Participant
@georgejervis86082
Hi everyone,
Thank you for the continued help I’ve managed to check and it’s set up to 50Hz and L2A is on YES as well, but still no joy?
One of the parameters say I have 235 to 236 volts going into the converter so I have enough voltage going in.
Knowing my luck, it’ll be something really simple lol (I hope)
George
23 September 2018 at 17:03 #372908
John Rudd
Participant
@johnrudd16576
As Martin has said above, we need a diagram of how the inverter is wired, especially the stop/start and speed inputs.

Reading the manual, it looks like these inputs are missing hence the 'no go' Page 47…

The front panel controls seem lacking in functionality…
23 September 2018 at 17:43 #372915
George Jervis
Participant
@georgejervis86082
Hi Martin,

I've put some more pictures in a album of the wiring to the motor and converter

The wiring I've used is 1.5mm2 sc 4 core

Converter wiring as follows

U is wire 3

V = 2

W=1

E tm earth

And the motor is wired too

U1 is wire 3

V1 is 2

W1 is wire 1

Earth is E

I'll try and write what the parameters I have on the converter at the moment but this might not be on here until later or tomorrow morning.

Many thanks again for the help

George
23 September 2018 at 17:59 #372917
David Jupp
Participant
@davidjupp51506
What about the control wiring ? Nothing will work without that.
23 September 2018 at 18:28 #372922
John Rudd
Participant
@johnrudd16576
Posted by David Jupp on 23/09/2018 17:59:50:

What about the control wiring ? Nothing will work without that.

Err…like what I said above….George you need some more string….and leave the inverter settings alone for the time being…concentrate on getting the motor to turn first..
23 September 2018 at 18:39 #372926
George Jervis
Participant
@georgejervis86082
This is were I could have gone wrong ? Does this mean I have to have a separate on off switch?

I had a few years ago a 3 phase converter on a large drill press that I just pressed the enter button for on or off and used the arrows up and down to increase or decrease the speed but I have sold that now. I had assumed that this 3 phase converter would be the same??

George
23 September 2018 at 18:48 #372928
John Rudd
Participant
@johnrudd16576
George,

Can you fit a short length of single core wire to connect LI1 and +24v together, then another wire to +10 and AI1 terminals? Then tull us what happens…Hopefully the motor runs at full speed..
23 September 2018 at 18:57 #372931
George Jervis
Participant
@georgejervis86082
I’ll have to try that tomorrow morning and I’ll let you know what
happens, fingers crossed

Thank again everyone for trying to figure this out
George
23 September 2018 at 20:29 #372959
Martin Cargill
Participant
@martincargill50290
George.

Don't do anything yet with regard to trying to start the motor. We need to know a bit more about how you have the motor wired. What you have shown so far is the power wiring, As John Rudd has pointed out the control side of the wiring is missing. What I'm not sure of just now is how you have connected the motor. Does the wiring run directly from the converter to the motor, or does it go through the original switchgear? Does the power supply to the converter go through the original switchgear or direct from the mains?

Martin
23 September 2018 at 20:37 #372962
George Jervis
Participant
@georgejervis86082
Hi Martin,
The converter is plugged straight into the house mains via a 13amp plug and the motor is wired directly to the converter with no switches inbetween.
The original switch on the mill you may see isn’t connected to anything anymore.
in my rush to get the 3 phase motor on I cut the wire to the single phase motor and and switch that was on the mill originally
George
23 September 2018 at 20:49 #372963
Martin Cargill
Participant
@martincargill50290
George. That's fine, please continue to try the instructions that John Rudd gave you. My concern was that you had managed to include the old switchgear into the circuit, most convertors don't take too kindly to having their output switched by contactors.

Martin
24 September 2018 at 12:46 #373044
George Jervis
Participant
@georgejervis86082
Hi everyone,
I’ve put some more pictures in my album to show were I’m up to.
I’ve been in touch with my electrician friend who gave me the it, and we’ve been slowly going through his list of things to try. There’s still no luck with it so far but thought I’d keep everyone updated as to how it’s going or if anybody else has any more input that can help
Thank
George

Edited By George Jervis on 24/09/2018 12:48:17

Edited By George Jervis on 24/09/2018 12:48:55
24 September 2018 at 12:59 #373047
David Jupp
Participant
@davidjupp51506
The manual clearly shows (top of p47) that if you are not using an external 24V supply, you should common together LO+ and +24 to feed the switch inputs.
Author

Posts