AVR R438 For Leroy Somer Alternator


R438 Automatic Voltage Regulator
The circuitry of the R438 Automatic Voltage Regulator (AVR) provides closed loop control of the generator output voltage by regulation exciter field current,R438 can be powered by EREP or PMG field excitation system and fitted as an option on:
-100series generators
-200series generators
-300series generators
With the AREP excitation system the R438 AVR is powered by two auxiliary windings which are independent of the voltage detection circuit. With the PMG option the R438 AVR is powered by the PMG which is fitted ar the rear end of the generator.
Voltage Regulation < ±0.5%
Load Acceptance Module (LAM)
50/60 Hz Selectable
Under Frequency & Exc. Max Protection
Single Phase Or Three Phase Voltage Sensing Optional
Soft Start Voltage Ramping
Normal Rapid Response Time (Option)

R438 Automatic Voltage Regulator Product Detail:

Place Of Origin Taizhou,China
Brand Name YAMADA
Brand Leroy Somer
Model Number R438
Type Brushless
Phase 1
Self excited Yes
Alternator Power >50KW
AVR Can Material PP,ABS,ROHS
Package 50pcs per carton
Individual box Packing Yes, We could print customer’s logo
Produce Ability 3000pieces per day
Certification CE,ROHS
Minimum Order Quantity 2PCS
Delivery Time 5-25days
Payment Term Wire Transfer(TT),Western Union, Paypal, LC at sight
Samples Charge
Samples Ship Cost Customer pay, If you have courier No.(UPS,DHL,TNT),Please send it to us.
Loading Port Ningbo ,Shanghai, Guangzhou
Harmonized System Code(HS) 8503009090
OEM Manufacture Service Yes

R438 Automatic Voltage RegulatorTechnical specification

Voltage Sensing:
terminal 0-110V=95-140V
terminal 0-220V =170-260V
terminal 0-380V=340-520V
Frequency: 50-60Hz

Voltage :40-50VAC, 3 phase
Harmpnic auxiliary winding :6-150VAC (no-load rms)

Voltage: max 160VDC at 120VAC input
Current: max 8A
Resistance:15 Ω minimum
Regulation:+/-5% RMS with 4% engine governing
Voltage establish: residual voltage at avr terminal≥ 5AC
External Voltage Adustament:+/-10% with 1k ohm 1 watt trimmer

We also provide design service for customers’ demands.