Tib 0055 - r450 Avr Replacing the r448 Avr

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OlympianTechnical InformationBulletin

TIB 0055

10th October 2010

SUBJECT: R450 AVR Replacing the R448 AVR

In line with constant product improvement we are pleased to announce that LeroySomer have released a new R450 AVR that will replace the current R448 AVR. It is anew design and comes with many product improvements.You will no longer be able to order an R448 as a spares item and instead you will get anR450. To fit the R450 successfully you will need a Pin/Connector kit then follow thefitting procedure below.

R448 – R450 Production Change date: 4th October 2010

Parts Required

1 x R450 AVR One of the below type.

R450M (single phase sensing) 10000-47135R450T (three phase sensing) 10000-46269

1 x Pin/Connector Kit 10000-49970

Optional Crimping Tool and pin extractor part numbers.

Crimping Tool 10000-49967

Pin Extractor 10000-49968

Ensure that the generator set has been safely isolated from starting beforecarrying out any work.



1. Remove all of the spade type connections from the R448 AVR paying attention towhich terminals they came from, remove the bolts securing the AVR to the main ACalternator and remove the AVR.

2. Fit and secure the new R450 AVR to the main AC alternator as shown below infigure 1.

Fig 1.

3. Cut off all of the spade type connections from the AVR wiring, then strip 5mm

insulation off each of the wires and crimp each wire securely to the pins supplied. Seebelow, in Figures 2 and 3.

Fig 2. Fig 3.



4. Refit each pin/wire into the correct ‘Mate N Lock’ connector by using theconnection diagram at the end of this bulletin. See examples below in figures 3, 4, 5.

Fig 3. Fig 4. Fig 5.

5. Set the R450‘s rotating wheels in the correct position according to the application,before starting the engine. (See diagram provided at the end of this document). Notethat for Shunt connected machines, Rotating Wheel 3 should be set, as default, toposition 0 for normal AVR response.

Fig 6.

Rotating Wheel 1

Rotating Wheel 2

Rotating Wheel 3



6. Make sure the P2 STAB potentiometer is set in the middle position, and then if thevoltage is unstable adjust the P2 potentiometer in order to achieve voltage stability.Make sure P3 I EXC potentiometer is in the fully clockwise position before starting, asshown in figure 7 below.

Fig 7.

7. Start the generator set. Adjust P1 as shown below in figure 8 until rated voltage hasbeen reached.

Fig 8.

P2 Stability P3 Excitation

P1



8. If the external frequency set option is used, make sure rotating wheel 1 is set toPosition 8 or 9, as shown below in figure 9.

Fig 9.

9. If the External Voltage setting option is used on the control panel, connect theexternal potentiometer wires to the AVR input as shown in figure……… below. If thereis no External voltage setting installed on the control panel, ensure that you install thesupplied jumper wire, that was provided with the pin and plug kit.

Fig 10.

External Frequency set inpuconnection

Rotating Wheel 1

Jumper provided withthe replacement kit



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For more information contact [email protected]

Tib 0055 - r450 Avr Replacing the r448 Avr

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