Transcription of FOR SHUNT, AREP or PMG ALTERNATORS - Leroy …
1 R438 AVRFOR shunt , arep or PMG ALTERNATORS R438 is an analog AVR. It is designed for ALTERNATORS with a arep or PMG excitation. R438 controls the excitation current in order to maintain the output voltage of the alternator. R438 is performant in terms of voltage regulation, simple to set , to use and is can run without LAM (U/f), or with LAM, selection is done by strap ST5. It is in compliance with 60034-1 standard and 508 / approved. OPERATION RANGELSA 4042,344,346,347, 249,350,251,25 3 ,154 shunt ---------- arep -------PMG-------- Voltage regulation : %. U/F function (1). LAM function (2). Response time : 500 ms. Nominal excitation current : 5A. Maximum excitation current : 8A during 10 s. Supply range and voltage d tection : 95 to 520 V. Protection : fuse mode : StandaloneANALOG AVR R438 - REF. DATASHEE are done through the AVR. Potentiometer P1 : Quadrature droop setting.
2 Potentiometer P2 : Voltage setting. Potentiometer P3 : Stability setting. Potentiometer P5 : Excitation ceiling FEATURECONNEXION AND SETTINGU/F FUNCTION Operating temperature range : - 40 C to + 70 C. Storage temperature range : - 55 C to + 85 C. Hygrometry : 98%. Maximum choc : 9 g on 3 axis. Vibrations : less than 10 Hz , 2 mm peak magnitude. From 10 Hz to 100 Hz : 100 mm/s, below 100 Hz : 8g. Optional modules compatible : R731 : three phase voltage sensing. R734 : 3-phase current and voltage sensing for parallel operation. R726 : regulation system changed to 4 - function .OPERATION CONDITIONSLAM FUNCTIONX2X1Z2E+E-0V110220380Z1140 mm125 mm4 x holes 5,8 x 115 x 100 mmF1 Slow fuse250V 8 AST5with LAM without LAM ST350 Hz60 HzFrequency13%25%ST10ST10 LAMS ingle-phasedetectionST1 Responsetime normalfastST2 External potentiometerfor adjusting the voltageST4 VoltageP2 QuaddroopP1 ExcitationceilingP5 StabilityP3open knee-point:65 HzS T11ST9 AREPPMGO ption I.
3 S2S1P1P2 Option 3-ph. detectionin 3-ph. detection ST1 openR731 Nidec 2017. The information contained in this brochure is for guidance only and does not form part of any contract. The accuracy cannot be guaranteed as Nidec have an ongoing process of development and reserve the right to change the specification of their products without %50 Hz60 HzHz50 Hz48 Hz57 Hz60 HzVoltageKnee Knee U/UNFrequency01 s 2 s 3 sLAM0,90,8fN01 s 2 s 3 sUN00,90,8(U/f)1 s 2 s 3 sVariation in the load Load on the shaft (kW)Load shedding due to LAMMax. speed dropwith LAMwithout LAMwith LAMTimeTimeTimewithout LAMT ransient voltage dropR438
