about a blake from SEW EURODRIVE 1

[181273]

first of all, hello and good year to everybody, then I´ll like to ask your help: The last week I was working on my office, when a customer ask me for the connection of a blake for a motor he gots in a electric winch. It´s a eurodrive motor with a electrical blake in its top, this blake is feed from something like a rectifier or samething like that, manufactured by SEW eurodrive... I wonder how to connect it, and what must be the voltages... I measure with my fluke and see the output AC and dc current??? feeding the blake, I use an old one and a new one..
could any of you to help me. sorry for my bad english...

 

[Skogsgurra]

Your English is not extremely bad. But you seem to have a problem with "r" and "l" - it is a brake you are asking about, I presume.

Those brakes come in many versions and there is usually a little label somewhere telling what to connect and where to connect it. Without any further information, it is better say nothing. Wrong tips can result in destruction or accidents. You should at least provide motor and brake type - nameplate data would also be good to have.

Gunnar Englund

http://www.gke.org

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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

 

[181273]

ok thanks a lot .. je,je.. l for r, je,je
this evening I´ll see the infoasked thanks for speedly answering

 

[stardelta]

We have a lot of dealings with SEW and I am very familiar with their products. The SEW rectifiers that I know all have the connection diagram moulded into the plastic on the top face of the rectifier and as far as I know they are the same all over Europe. Just follow the diagram and you cant go wrong. If you find the diagram confusing or for some reason its not there please answer these questions and I can still probably help you.
Is it fitted to a 3ph motor?
Is the rectifier a black or red plastic box with 5 screw terminals on it? Note some have an extra set of terminals fixed on top of the rectifier for ETD`s or heaters. Dont get these confused with the rectifier.
Does the brake coil have 3 leads from it, red, blue, and white with a tracer?
Is the brake fed from the motor terminal block and if so what are the operating voltages for the motor and brake coil, this information will be on the nameplate?

 

[itsmoked]

stardelta; Are those brakes always DC (or pulse DC)?

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[181273]

About the info for the motor type K127DU225M4MHRTFC, 45KW, 500V, Brake Volts 380, 250Nm Bge

For stardelta, the rectifier is on a red plastic box with five terminals and I like to know what is inside and the wire diagrams (How to connect, etc..)

 

[Skogsgurra]

Stardelta is your man.

Gunnar Englund

http://www.gke.org

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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

 

[stardelta]

I think I recognise this... K127DU relates to the gearbox, its mounting arrangement and shaft position. 225 is the motor frame size and M4 means 4 pole. HR indicates manual brake disengagement, TF means ETDs are fitted and C means a vertical mtd cowl. However 45kw is quite large for any brakemotor and I have to say I have never seen one made by SEW of this size. Type BGE rectifiers have 5 terminals, all numbered. There will be 3 leads from the brake coil, match the colours on the brake leads to the numbered terminals on the rectifier.
White: 1
Red: 3
Blue: 5
The AC supply in this case 380v is fed into terminals 2 and 3. (terminal 3 is also shared with the red from the brake...this is not a mistake).
The rectifier contains diodes in a standard bridge arrangement. The purpose of the third lead from the coil is to allow the back EMF generated when the coil is de-energised and the field collapses to be fed back into the rectifier and dissipated through one or two of the diodes. This allows for a more positive operation. At least that is what the Rep` once told me so I will stand corrected on that.
If the brake leads are not coloured this way or if there is additional wiring/connections please let me know. SEW are very good at providing technical information and there is documentation including all the internal circuit diagrams relating to rectifiers, brakes and brakemotors available for download at their website.