You are not registered yet. Please click here to register!


 
 
plc storereviewsdownloads
This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
 
Try our online PLC Simulator- FREE.  Click here now to try it.

---------->>>>>Get FREE PLC Programming Tips

New Here? Please read this important info!!!


Go Back   PLCS.net - Interactive Q & A > PLCS.net - Interactive Q & A > LIVE PLC Questions And Answers

PLC training tools sale

Reply
 
Thread Tools Display Modes
Old November 13th, 2017, 07:19 AM   #1
Mad_Poet
Member
United States

Mad_Poet is offline
 
Join Date: Feb 2017
Location: Virginia
Posts: 114
Siemens Masterdrives AC/DC Rectifier

Dear Sirs,
What I need is some insight into 'Forming' the capacitors (or re-forming)
inside a Siemens Rectifier.

The box turns 480 Vac into high voltage DC for some Masterdrives.

Part number is 6SE7031-2EP85-0AA0.

Can anyone point me to the proper manual for this beast?

Thanks,
Poet.
  Reply With Quote
Old November 13th, 2017, 03:23 PM   #2
jraef
Member
United States

jraef is offline
 
jraef's Avatar
 
Join Date: May 2006
Location: Northern California
Posts: 1,295
There are all manner of guides on the web for "capacitor reforming" procedures. The concept is universal, the brand of drive is irrelevant. Having the right tools for this is however, important and not often standard fare; you need a variac (variable autotransformer) power source that goes up to your line voltage.

Did you have this powered down for over a year?
  Reply With Quote
Old November 13th, 2017, 03:31 PM   #3
sigmadelta
Member
Canada

sigmadelta is offline
 
Join Date: Apr 2016
Location: From Canada - Living in Bulgaria
Posts: 576
https://www.industry.usa.siemens.com...ge_details.pdf
__________________
Freelance Automation Programmer
  Reply With Quote
Old November 13th, 2017, 03:54 PM   #4
Mad_Poet
Member
United States

Mad_Poet is offline
 
Join Date: Feb 2017
Location: Virginia
Posts: 114
Thanks guys.
I was hoping for something a little more specific - this is the 'Common rectifier'.

In our machines, it turns 480 VAC into high voltage DC for powering up either two, or four, or six MasterDrives.

Our box does not have a programming panel on it . . . is it supposed to be programmable?
Poet.
  Reply With Quote
Old November 13th, 2017, 03:54 PM   #5
Mad_Poet
Member
United States

Mad_Poet is offline
 
Join Date: Feb 2017
Location: Virginia
Posts: 114
P.S. We bought a 'used spare' from a place and we do not know how long it might have been sitting on a shelf.
Poet.
  Reply With Quote
Old November 13th, 2017, 04:19 PM   #6
JRW
Member
United States

JRW is offline
 
JRW's Avatar
 
Join Date: Jun 2002
Location: Upstate South Cackalacky
Posts: 1,526
I didnt know a compact plus rectifier needed reforming
but theres a lot of things I dont know
But I do know it's a nonregen rectifier. They are not programmable like the RRU

Last edited by JRW; November 13th, 2017 at 04:45 PM.
  Reply With Quote
Old November 13th, 2017, 05:10 PM   #7
jraef
Member
United States

jraef is offline
 
jraef's Avatar
 
Join Date: May 2006
Location: Northern California
Posts: 1,295
It's not the rectifier itself that needs reforming, its the DC bus caps. If your rectifier unit is NOT inclusive of the DC bus caps, then there is nothing to reform. I can't tell from the Siemens literature if this unit is just the rectifier and the DC bus caps are in the drives, or if this includes the caps and pre-charge circuit. That sounds like a call to Siemens...
  Reply With Quote
Old November 13th, 2017, 06:09 PM   #8
JRW
Member
United States

JRW is offline
 
JRW's Avatar
 
Join Date: Jun 2002
Location: Upstate South Cackalacky
Posts: 1,526
Mad
Since these rectifiers do not have reforming discussed in the manuals...
let us know what Johnson City hotline says...
  Reply With Quote
Old November 14th, 2017, 01:13 AM   #9
richardbaker
Member
Canada

richardbaker is offline
 
Join Date: Nov 2017
Location: Toronto
Posts: 4
Optimized system availability due to compliance with the strictest production and quality standards are the merits of using such products.

I think the following link could help you find more details.
http://www.industry.siemens.com/vert...s/default.aspx
  Reply With Quote
Old November 14th, 2017, 11:40 AM   #10
Mad_Poet
Member
United States

Mad_Poet is offline
 
Join Date: Feb 2017
Location: Virginia
Posts: 114
A former co-worker of mine (he left to go to californica) was taking care of those things . . .

Amongst his notes I found this :
>>>
1. Rectifier reform - you can do this and it will extend the life of this component, commonly this is done by applying power but not running for at most 12 hours.

2. MM420 reform - This can be done as well by applying the 440v and not running it for a fixed amount of time. This can be done while the drive is offline, but powered.

No one here has ever formed a micromaster drive, other than just powering it.
- John MacDonald
Goss Technical Support
>>>

My former co-worker also built up a circuit - three phase rectifier, resistor, capacitor - for re-forming drives. I re-formed and installed one drive with it, and then re-formed a second drive.

As per this note, I put 480 VAC to my common rectifier, and I'm letting it sit with it. Maybe next week I'll try putting it into a machine. (Along with that second drive I re-formed - both need testing.)
Poet.
  Reply With Quote
Reply
Jump to Live PLC Question and Answer Forum

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Topics
Thread Thread Starter Forum Replies Last Post
Siemens or Omron? Gromit LIVE PLC Questions And Answers 35 November 14th, 2017 10:44 AM
AdvancedHMI - Siemens PLCs S7-200/1200/300/400 Beta drivers BryanG LIVE PLC Questions And Answers 25 December 3rd, 2013 03:21 AM
Siemens to Allen Bradley sweetjohnny LIVE PLC Questions And Answers 4 April 20th, 2013 01:46 AM
Siemens 505 to Siemens S7 Rob S. LIVE PLC Questions And Answers 5 July 10th, 2012 07:37 PM
Transfer Data From Siemens PLC to AB PLC Danocane LIVE PLC Questions And Answers 8 September 7th, 2007 06:29 AM


All times are GMT -5. The time now is 11:58 AM.


.