Siemens 1ph to 3ph inverter wiring

[calpol91]

Wah gwarn guys...

Does any body have any knowledge on the above? I want to go through what I've wired up before I switch it on...

 

[gnuuser]

you should be able to download the manual from here.
Siemens Micromaster 420 3kW 230V 1ph to 3ph AC Inverter Drive Speed Controller - AC Inverter Drives (230V)

hope this helps

 

[calpol91]

Cheers pal. I'm just waiting on a power supply for a separate control circuit then it's going on... Or bang...

I've done work on machinery, motors etc but not done much in the way of drives & inverters

 

[gnuuser]

i've installed a few 3 phase inverters
they are not difficult once youve done it a couple times
I always save a manual from each model I install for references in setting parameters.
an inverter typically controls the phase rotation regardless of how the supply is phased
and changing rotation is a matter of a setting.
if you want to change phase rotation by switching 2 leads it must be done on the output side of the inverter.(changing them on supply side will not have any effect)

 

[Darkwood]

Cheers pal. I'm just waiting on a power supply for a separate control circuit then it's going on... Or bang...

I've done work on machinery, motors etc but not done much in the way of drives & inverters

If the parameters and control you need are very basic its a small learning curve and you should pick it up but ensure you adhere to the screening and noise filter requirements of the drive...

If you require advanced settings and motor control then you are jumping into the deep end and I suggest you do a lot of research or get someone on board who can guide you... it starts simple for the basic but gets very complicated very quickly and you really need to understand every aspect of the drives settings and motor your controlling.

You will often get a quick setup guide if this serves your needs then simples if you go advanced and need the online full parameter guide then be very cautious.

 

[calpol91]

Thanks darkwood. Fortunately, we realised there were 2 of the same machine, same inverter, so we managed to use the bop to copy the parameter's. I was more worried about the wiring since the machine inverter blew less than 18 months ago and the bloke Who repaired that left all the sensors for the limits out and more or less just used the stop/start on the bop. Presumably this is why its blown again.

Thanks guys

 

[Darkwood]

Cheers for the update calpol91 - glad you got it sorted as for my thoughts here is I believe you have an underlying cause if the drives are 'blowing' (explain more to what you mean by blowing).

-Ensure your control housing have the sufficient ventilation to keep the units cool.
-Look for signs of condensing moisture around the drive as this is a common cause of drive failure.
-Some older drive and budget drives have poor short circuit protection on the outgoing terminals... if your cables are constantly flexing with machine natural movement then test the condition of the cabling and ensure it is designed for purpose if under repeated flexing - common brands are LAPP or IGUS
-Test the motor -again moisture ingress can lead to flash-over where it turns to a short circuit which arcs about the winding but vapourises the underlying cause (moisture) and can leave any engineer scratching their heads.... Ive seen many intermittent faults with motors that leave little or no trace as the fault current can vapourise the evidence... this usually is an issue more associated with DC motors and slipring motors where atmospheric content like oils and powders (from nearby machines)can coat the rings or com's until you get a flash over.

A correctly spec'd and serviced drive should give you a very good life span but often servicing of the drives is not done as dependent on drive duty some parts may need replacement after only 2-3yrs and others every 5yrs or so, this info should be within the installation manual.

 

[netblindpaul]

A correctly ... serviced drive ... often servicing of the drives is not done ... this info should be within the installation manual.

I've just tried to keep what I feel is relevant to the comment I am about to make, hence the paraphrasing in my quote.

My previous employer did not consider their drives user serviceable, or requiring any user service intervention.
Thus no info in the manuals, and no info to 3rd party repairers.
OEM repair only.
They seem to have build a reasonable reputation out of it, and it does not seem to come back to bite them, so perhaps their designs are fine?...

 

[silva.foxx]

My previous employer did not consider their drives user serviceable, or requiring any user service intervention...

They seem to have build a reasonable reputation out of it, and it does not seem to come back to bite them, so perhaps their designs are fine?...

Depends on if they are applied, installed and housed within the manufacturer's spec. We know that most are not, according to posts on here and own experience.

 

[netblindpaul]

silva
I suspect you have worked on a few of them, they will have been applied in accordance with manufacturers specs, and installed and housed originally to that spec, it't just that the standard of care is rarely kept up.
I mean their internal designs, not the machine designs, though they are rarely an issue for the drive due to the applications engineering support that was given globally to the machine builders.
Once they fail, it's just a drive swap anyway, and send it off for repair.
So no real biggie.

If their "home" is kept up to scratch they do have a very long service live, I've seen them having lived in the field for 20 years without failure.