AVR R449 remote voltage adjustement

[xxlcdx]

Hello everybody,

I have one 2 generators 20KVA equipped with AVR R449 regulator, I want to make synchronisation with SPM-D21 from Woodward since the governor is also from Woodward ,
Now I have the voltage control coming from SPMD21 but I don't know where to connect exactly on my AVR

Attached , datasheet for AVR R449,

Thank you so much for your help

 

[catserveng]

From your diagram it looks like you ordered the SPM-D21 without analog speed and volts bias.

To use this with your voltage regulator you will need to add a motorized potentiometer compatible with the "three step" controller used by the SPM-D.

The R449 AVR usually uses a 470 ohm 3 watt potentiometer for a +/- 5% adjustment range.

Paragraph 1.3.4 on page 7 of your manual discusses the voltage adjustment, wire the correct potentiometer as shown (ST4)

Hope that helps, MikeL

 

[xxlcdx]

@Catserveng

Thank you for your reply ,
I didn't order yet the SPM-D21 , Maybe I will order it with analog speed and volts bias

In this case , I'm still not sure where is the connection for both Ia and Ua in R449

Regards,

 

[catserveng]

Here is the interface or the R449, the instruction references a Woodward DSLC but the interface and voltage range setting is the same.

Hope that helps, MikeL.

 

[xxlcdx]

@Catserveng

Thank you ,
I'm just a little bit confused , I don't find this (- , +) terminals on the AVR R449 Datasheet,

Is it an external module to be used with R449 to enable remote voltage adjustment ?

 

[catserveng]

On page 5 of your instruction manual, at the right hand side of the illustration for the R449 AVR, below the P1 potentiometer, is the J2 terminal strip (not marked on this drawing), the top two terminals are to connect a droop transformer if used. the next two terminals that are shown with a jumper installed and called out as the ST4 option is where to connect the interface between the AVR and the SPM-D.

On page 7 is a better illustration of the option under paragraph 1.3.4 Voltage adjustment, it shows the J2 terminal strip and the ST4 option with a diagram of the external rheostat/potentiometer. As I remember you use the top terminal (the one connected to the wiper of the pot) to + and the lower terminal to -

Hope that helps, MikeL.