Vibration motor connection

[anydream]

Which are the most used connecting cables between frequency converter and a vibrating motor?
I think the cable should be flexible class 5, nominal voltage 600/1000 and shielded.
Thanks

 

[malcolmsanford]

If your utilizing frequency drives and motors I'm assuming you are in an industrial environment and to be honest I would not be using a class 5 flex.

I personally prefer to use stranded singles through a flexible conduit, something like kopex or flexicon you could also utilize a SY cable for the enviroment

 

[Knobhead]

I’ve always used SY since it became readily available. Don’t whatever you do allow any strain of flexing on the gland otherwise you’ll be changing the cable every week. Cleat the cable to the mounting frame and then form a loop the fixed portion.

View attachment 11321

 

[anydream]

Thanks for your answers
SY meets 2 of the 3 conditions (class 5 flex and shield) but nominal voltage is 300/500V (maybe it exists with higher voltage). Using frequency converter there can be voltage spikes up to 1000V because it does not produce a sinusoidal output voltage but a continuous train of pulse. Are there 600 Volts rated SY cables?

 

[malcolmsanford]

SWA is 600/1000v

 

[anydream]

SWA is 600/1000v

But it's unsuitable in case of vibrating motor

 

[Darkwood]

Ive just fitted some externally screened flexible conduit from inverters to motors, a tad more expensive but allowed me extra cables to temp sensor and force fed fan and still maintain a 16mm gland into motor as it wouldn't accept larger.

 

[anydream]

Ive just fitted some externally screened flexible conduit from inverters to motors, a tad more expensive but allowed me extra cables to temp sensor and force fed fan and still maintain a 16mm gland into motor as it wouldn't accept larger.

Which cables types did you put inside flexible conduit?

 

[Knobhead]

If you’re worried about voltage levels get in touch with http://www.basec.org.uk/Home

Personally I think your worrying about nothing.
It’s the best cable I’ve found for the job over 40 years of dealing with vibrating motors.
Flexible conduit nearly always falls apart leaving sharp edges to cut in to the cores. The cores by not being constrained wear against each other.

 

[Darkwood]

Which cables types did you put inside flexible conduit?

Just standard tri-rated with crimps, but as Tony says standard flex-conduit may not last long this stuff i used i fitted swivel head glands and also the braiding acts to dampen the vibration very well, plus you retain the screening required for your drive.

 

[anydream]

If you’re worried about voltage levels get in touch with http://www.basec.org.uk/Home

Personally I think your worrying about nothing.
It’s the best cable I’ve found for the job over 40 years of dealing with vibrating motors.
Flexible conduit nearly always falls apart leaving sharp edges to cut in to the cores. The cores by not being constrained wear against each other.

I didn't find any information about SY in basec site but your experience is more than convincing.
In case of long distance between frequency converter and motor (for example 50 m) what is the best solution between
SWA -> Junction box -> SY
all SY

 

[Darkwood]

Its always an advantage to get the inverter as close to motor as possible but if not you will need seek tech advice on your inverter and see what measures are needed to stop over-voltage up to 2X the bus-voltage which can do alot of interference and damage.... asking such questions would imply you need to do alot of homework and asking the odd question on here wont be good enough, strict reg's governing noise produced by the inverters must be adhered to using line filters etc in correct places and positions.... things are quite easy if within cable run guidelines regarding screening and filters but once you exceed this you need to know your stuff.

 

[anydream]

Its always an advantage to get the inverter as close to motor as possible but if not you will need seek tech advice on your inverter and see what measures are needed to stop over-voltage up to 2X the bus-voltage which can do alot of interference and damage.... asking such questions would imply you need to do alot of homework and asking the odd question on here wont be good enough, strict reg's governing noise produced by the inverters must be adhered to using line filters etc in correct places and positions.... things are quite easy if within cable run guidelines regarding screening and filters but once you exceed this you need to know your stuff.

For the inverter supplier shielded cables of 50m are not a problem. So I'm not asking if I can do it but (in your experience) the most used connecting system, that better meets EN 60204-1 and UK regulation.

 

[Darkwood]

Sorry not teaching you to suck eggs... , seen many methods used armoureds straight to motor, s/y, combinations, screened flexi con, and even saw singles in a dedicated trunking from panel to motor which i could see been effective but also see a flaw of someone else coming long and using trunking run for other cables so doubt this meets standards. Its comes down to each install and what is best method but theirs no one method fits all in mind just knowing all the methods tends to give you a good start.

 

[benji]

would you need some form of isolation adjacent to drive if it,s 50 mtr away???