Leroy-Somer R 725A Connection And Adjustments Download Page 9

 ERREUR DE BRANCHEMENT (PHASES) OU TI A L'EN-
VERS (PERMUTER LES 2 ARRIVEES SECONDAIRE S1
S2),
 . charger le groupe en augmentant la 

vitesse

 (+ kW) et ré-

gler à 60 % de la charge nominale (kW),
 . régler au 

cos  

ϕ

 

extrème

 désiré

 par le

 potentiomètre in-

terne P 4 (Limite) 

: on augmente la puissance réactive

fournie (= diminue le cos  

ϕ

 ) en tournant P2 en sens horaire

(

voir  nota)

,

 . si on ne peut pas obtenir le cos  

ϕ

 désiré = ERREUR DE

BRANCHEMENT (PHASES),
 . INSTABILITE := agir sur le potentiomètre P3 et  éventuel-
lement sur le potentiomètre STABILITÉ du régulateur.
 . Régler (+kW) 90%  de la charge nominale (kW)
 . Régler le cos  

ϕ

 

nominal à l'aide du pot P2 (cos  

ϕ

)

NOTA 

1) si on ne dispose pas de phasemètre ou "cosphimètre", il
faut calculer  le

 courant stator (IS)

 à obtenir pour le cos 

ϕ

 

désiré
    kW = indication wattmètre (kW),
    U RESEAU = tension réelle réseau (V)

2) 

réglage de cos  

ϕ

 = 1

 : c'est à cos 

ϕ

  = 1 que le courant

stator Is est 

minimum

 pour une puissance active constan-

te (kW) : chercher le minimum.

6.2.5   . VARIATIONS TYPIQUES DE LA TENSION (OU
DU COURANT) D'EXCITATION.

Pour identifier ou confirmer l'état de fonctionnement de l'al-
ternateur, il est utile de surveiller la tension Uexc (ou le cou-
rant ) d'excitation.
L'unité est la tension d'excitation à vide U eo nominale et les
valeurs numériques correspondent à une machine ayant
une réactance synchrone Xd = 200 %.

WRONG CONNECTION (PHASES) OR REVERSED C.T.
(TRANSPOSE LEADS COMING FROM C.T. SECONDA-
RY S1 S2),
 . load genset by increasing 

speed

 (+ kW) and adjust to

about 60 % of rated load (kW),
 . adjust the

 requested lowest power factor

 (cos 

ϕ

 ) with

the module internal potentiometer P4 (LIMIT) = turning the
pot. clockwise increases the supplied reactive power (de-
creases P.F.). See note,
 . if it is not possible to get the requested P.F. that  means
there is a CONNECTION MISTAKE (PHASES MARKING),
 . IF UNSTABLE : set with STABILITY pot. P3 and eventual-
ly with the STABILITY pot. of the voltage regulator.
 . adjust speed (+kW) to reach 90% of rated kW
 . adjust the rated P.F. with pot P2 (cos 

ϕ

 )

NOTE

 :

1) if neither phase-shift meter or power factor meter are
available, the

 line current Is 

has to be calculated to enable

adjustment of the required P.F. (cos  

ϕ

 )

     kW : kilowattmeter reading (kW),
           U RESEAU = real   reading  mains        
       voltage (V)

2) 

adjusting P.F. = 1

 : at P.F1 the line current Is is 

mini-

mum

 when the active load (kW) is kept constant.

Adjust P.F.1 by adjusting  the minimum of line current.

6.2.5  . TYPICAL VARIATIONS OF EXCITATION VOL-
TAGE (OR CURRENT).

To identify or confirm the operating conditions of the alter-
nator it is useful to measure/monitor the excitation voltage
Uexc (or current).
The unit is the no-load excitation voltage Ueo (for  rated vol-
tage) and datas correspond to an alternator having a syn-
chronous reactance Xd = 2.00 p.u. 

9

Module R 725A

Module R 725A

I

S =                

(kW) x 1000

(A)    (Cos 

ϕ

)x 1,73 x (U réseau)

0

1

(min)

2

3

(max)

4

A LA TENSION NOMINALE

AT RATED VOLTAGE

Uexc

Ueo

0

100%

CHARGE

LOAD

3.5

2.75

2.25

1.9

1.7

0.6 AR / LAG

0.8 AR / LAG

0.95 AR / LAG
1

0.95 AV / LEAD

}

Cos 

ϕ

P2

Sens horaire
Clockwise

TENSION D'EXCITATION

EXCITATION VOLTAGE

1

(min)

2

3

(max)

4

A CHARGE CONSTANTE

AT CONSTANT LOAD

(kW)

U

N

 - 10%

}

Cos 

ϕ

(KW)

TENSION RESEAU

MAINS VOLTAGE

0.6 AR / LAG

0.8 AR / LAG

1

A VIDE
NO LOAD

U

N

 -

NOMINALE

RATED

U

N

 + 10%

A

B

A

B

 SUREXCITATION (SURCHARGE)   
 OVER EXCITATION (OVERLOAD)
 SOUS-EXCITATION (DECROCHAGE) 
 UNDER EXCITATION (RISK OF GETTING OUT OF SYNCHRONISM) 

Uexc

Ueo

A

B

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Summary of Contents for R 725A

Page 1: ...Alimentation Supply U U C1 C2 UR UA S1 UR UA Cos Cos P1 U U P2 ND MEM ON OFF S2 S1x S2 REGULATEUR A V R Tension Voltage Rhe 470 SORTIE OUTPUT CALL US TODAY 1 888 POWER 58 REQUEST A QUOTE parts genpow...

Page 2: ...RAL 3 1 1 Purpose 1 2 Operating principle 2 OUTLINE DRAWING 4 3 DESCRIPTION 4 3 1 Adjustment range of remote pot 3 2 Wiring precautions 4 CONNECTION DIAGRAM 6 5 OPERATION PRINCIPLE 7 6 ADJUSTMENTS 7 6...

Page 3: ...REGULATION using an additionnal C T when the alternator is paralleling with the mains The 3rd FUNCTION being the BALANCE EQUALI ZATION OF VOLTAGES before paralleling U U which is generally realised by...

Page 4: ...s if no pot is used jumper ST1 term 5 6 INPUT OF COMMAND U U OPERATION when synchronising external contact C1 total impedan ce of circuit loop to be 5 ohms 50 Hz or 60 Hz term 7 8 INPUT OF COMMAND COS...

Page 5: ...C2 total impedance of circuit loop to be 5 ohms 50 Hz or 60 Hz term 9 10 remote pot to adjust power factor short these terminals of external pot is not used jumper ST2 TERMINAL STRIP J2 term 1 2 INPU...

Page 6: ...T 1A 5VA COUPLAGE PARALLELING NOTE NOTE Enlever le strap STZ ou le potentiom tre ext rieur sur le r gulateur Remove jumper STZ or remote pot on the voltage regulator Relais de tension alternateur VALT...

Page 7: ...ording to the mode imposed by external contacts named C1 for equalizer function U U andC2for power factor Cos r gulation Closingofthe contacts is signalled by LED When the mains voltage is not supplie...

Page 8: ...IMMEDIATEMENT 6 2 ADJUSTMENT PROCEDURE COMMISIONNING 6 2 1 PRELIMINARY CHECKS At first ensure that the excitation system of the machine has been properly adjusted in order so operate in the whole volt...

Page 9: ...t is not possible to get the requested P F that means thereisaCONNECTIONMISTAKE PHASESMARKING IF UNSTABLE set with STABILITY pot P3 and eventual ly with the STABILITY pot of the voltage regulator adju...

Page 10: ...THE MAINS VOLTAGE relay U ALT alternator output voltage to cut offthemainssupply sensingtothemodulewhenthegenra tor is stopped LIFE SAFETY differential voltage U MAINS U ALT relay or synchroni ser pr...

Page 11: ...U R SEAU THE MODULE R 725A REGULATES THE POWER FACTOR OF PLANT SEEN FROM MAINS UTILISATION LOCALE LOCAL USER TI CT 1A 5VA Cos PF y x2 y2 x kVAR y kW J2 2 1 2 1 x y E E RL MODULE R 725A REGULATEUR AVR...

Page 12: ...MISFUNC TION The complete system is supposed to have been previously operating satisfactorily 11 1 CHECKING AUTOMATIC VOLTAGE REGU LATOR see aplicable handbook disconnect the 2 wires linking to the M...

Page 13: ...A Transfo de s curit 110 220 24 V 100 VA ou 220 380 24V 100 VA Peut tre remplac par un condensateur C de 150 F permuter alors S1 S2 du transformateur TP Digital voltmeter range 2V DC AC RMS voltmeter...

Page 14: ...about 1 volt or about 1 volt By rotating potentiometer P1 U U dockwise from fully an tibockwise position voltage UCOM triggers from one of the maximum negative or reverse to the other maximum Thesett...

Page 15: ...2k 3 W 1 or 2 current transformer 5 VA secondary 1A Primary according rating 1 or 16 TECHNICAL ASSISTANCE SPARE PARTS Address enquiries and orders to MOTEURS LEROY SOMER Usine de Sillac 16015 ANGOULEM...

Page 16: ...7 8 9 10 R 725A U U Stab Cos 1 2 3 4 5 6 7 8 9 10 J1 J2 V U W L2 L3 Pot Tension ext 470 Remote voltage adjt 1 2 3 4 5 R f rences Tension Alternateur Voltage sensing Generator side T I C T U Alt P2 R 4...

Page 17: ...ext 1000 Remote P F adjt C1 C2 cos Voir sch ma interne See internal connection diagram R 129 P4 STAB 1 2 1 2 3 4 5 6 7 8 9 10 RED E E S2 S1 0 220 380 P1 P6 STAT INT P3 VOLT Hz P2 VOLT P5 LIM EXC COMP...

Page 18: ...8 9 10 R 725A U U Stab Cos 1 2 3 4 5 6 7 8 9 10 J1 J2 V U W L2 L3 Pot Tension ext 470 Remote voltage adjt 1 2 3 4 5 R f rences Tension Alternateur Voltage sensing Generator side T I C T U Alt P2 R 438...

Page 19: ...1000 Remote P F adjt C1 C2 cos Voir sch ma interne See internal connection diagram R 129 P4 STAB 1 2 1 2 3 4 5 6 7 8 9 10 RED E E S2 S1 0 220 380 P1 P6 STAT INT P3 VOLT Hz P2 VOLT P5 LIM EXC COMPOUND...

Page 20: ...ANGOUL ME S A au capital de 62 779 000 CALL US TODAY 1 888 POWER 58 REQUEST A QUOTE parts genpowerusa com SHOP ONLINE www genpowerusa com CALL US TODAY 1 888 POWER 58 REQUEST A QUOTE parts genpowerusa...

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