S120 SLM 12-pulse parallel connection

Hi,

in 12-pulse parallel connection of S120 Smart Line Modules 

can i use more than 4 SLM ?

for example two CU320 and 3 SLM for each CU?

I don’t have enough power 4 SLM 1400kW=5600 kW, I need one more 1400kW,

5 pcs. SLM 1400kW.

Hello,

with ALM I know you can use MASTER / SLAVE configuration. For example one CU with 4 ALM in parallel on one transformator and up to 4 on the other (with another CU with communication).

You can check the following manual:

https://support.industry.siemens.com/cs/ww/en/view/83180185

Zako

zako

Hello,

with ALM I know you can use MASTER / SLAVE configuration. For example one CU with 4 ALM in parallel on one transformator and up to 4 on the other (with another CU with communication).

You can check the following manual:

https://support.industry.siemens.com/cs/ww/en/view/83180185

Zako

 unfortunately I do not plan to use ALM, I will use only SLM...

according to SINAMICS - Low Voltage Engineering Manual 2017 (en)...

I can not understand the sentence

With 12-pulse parallel connections, up to four Smart Line Modules are supplied by a three-winding transformer on the line side. In this case, an even number of modules, i.e. two or four, must be divided between the two secondary windings.

could you explain to meup to four SML This is for one transformer winding or for both?

even number 2 or 4, an even amount of everything on all the windings?

Can i use configuration in 12-pulse par. connections

#1

can i use configuration CU320-2 + 3 x SLM +   CU320-2 + 3 x SLM (it's not an even amount?)?

#2

can i use configuration CU320-2 + 4 x SLM +   CU320-2 + 4 x SLM ?

Hello,

What they mean by that sentence is that when you have a transformer with two secondaries in star and delta, you should have the same number of SLM(one or two)on each of the secondary windings, i believe this is required to be able to share the load evenly and due to magnetic laws in the transformer...

Also, with the increasing number of modules in parallel, you will have to manage the protection, dimensionning of the DC busbars,  load sharing between the modules, and other stuff like the precharge circuitry,...

Phil

PhilSiemens1

Hello,

What they mean by that sentence is that when you have a transformer with two secondaries in star and delta, you should have the same number of SLM(one or two)on each of the secondary windings, i believe this is required to be able to share the load evenly and due to magnetic laws in the transformer...

Also, with the increasing number of modules in parallel, you will have to manage the protection, dimensionning of the DC busbars,  load sharing between the modules, and other stuff like the precharge circuitry,...

Best regards

Phil

Can i use configuration in 12-pulse par. connections

#1

can i use configuration CU320-2 + 3 x SLM +   CU320-2 + 3 x SLM (it's not an even amount?)?

#2

can i use configuration CU320-2 + 4 x SLM +   CU320-2 + 4 x SLM ?

if we choose a system three-winding transformer, 12-pulse parallel connection of SLM, one common DC link,

12-pulse parallel connections:CU320-2 + 3 x SLM +   CU320-2 + 3 x SLM

do i need to sync between both CU320-2?

How both CU will understand that they work in pairs (master/slave) or they do not need to know about it?