hi,

 Redundant is possible in g130 drive like s7-400H 

if one drive trip another drive will run automaticaly with same speed.??? 

What about that Drive itself doesn't run anywhere and doesn't have a speed at all?

Nice idea, Drive no.1 tripped by reason of oveload (max. torque on motor shaft or short-circuit in winding), then immediatelly switched on Drive no.2 and had tripped by the same reason within a second.

I fail to see the point.

Msorich

Hello gs;

I have no direct experience with this type of application, but there are some important considerations to take into account, as discussed by our friend Msorich.

I would like to point to TechTeam' reply in the following discussion from a few years ago:

https://support.industry.siemens.com/tf/WW/en/posts/two-drives-for-one-motor-for-redundancy/90502?page=0&pageSize=10

The "Hot Standby" application documents are not directly available in the link included in the thread, as described in TechTeam's answer. I suggest you ask about them through a Support Request (see link above); but before you ask decide what systems you want to use in your project, motor model, drive selections, and description of the application needs such as interlocks and safety equipment, so the answer from Siemens can be as clear as possible.

Hope this helps,

Daniel Chartier

hi,

thanks for your reply

i have another question i know its not work but somebody told its work.

example: consider D1 as first drive with output contactor/ACB as C1.consider D2 as another drive with

output contactor/ACB as a C2. the output of C1 & C2 connect  with respective phase RYB with busbar

then connect the motor cable in busbar.

both drive has same backup and start simultaneously 

if one drive trip output contactor/ACB will open

Note: 1) DC link voltage is not same on both drive it will vary little drive to drive whether if it is same incomer also.

        2) synchronization is not happend in this system

your suggestion pls...

Hello gs;

Maybe the contents of the following article can shed some light on a design you could investigate:

https://www.csemag.com/single-article/web-exclusive-vfd-bypasses-and-backups-which-should-you-use/12a0f64f1a17bcafe504a7b15d6ab855.html?OCVALIDATE=

Hope this helps,

Daniel Chartier

Hi dchartier,

I saw above link but in that last topic they use two drive with two motor 

But my requirement is two 800KW g130 drive connect with one motor 700kw ie. two drive output is given to one motor in this method load sharing in two drive happen or not.

In this condition if one 800KW drive fail another drive can deliver a load without changing speed.

Hello gs;

As stated before, the document was for general examination of the possible configurations, so I am glad that it sparked some attention on your part.

What other examples have you found in your research for this type of application? What could you bring to this discussion?

As part of the S120 function manual, you could find some application examples for parallel control of motors with two windings, and for motors with a single wiring using dual ALMs and MMs such as shown in the attachment below.

https://www.manualslib.com/manual/1207865/Siemens-Sinamics-S120.html?page=203#manual

Note that these are schemes that should be discussed with a Siemens drives specialist (through your nearest Siemens rep) before the complete application is designed and tested.

Hope this helps,

Daniel Chartier