Zhejiang, China
Business Type:
Trading Company
Number of Employees:
Year of Establishment:
Management System Certification:
ISO 9001, IATF16949
Average Lead Time:
Peak season lead time: within 15 workdays
Off season lead time: within 15 workdays
OEM/ODM Service
Sample Available
French / Japanese Speaker

Voltage Regulator, Voltage Stabilizer, Automatic Voltage Regulator manufacturer / supplier in China, offering Sx460 Diesel Generator Automatic Voltage Regulator, Fuel Lift Pump 4757883 for Tractor 3010s 3830 4010s 4030 4230, Ignition Lock Switch 7 Pins 87431469 for Backhoe Loader and so on.

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Supplier Homepage Products Power Genset Parts AVR Sx460 Diesel Generator Automatic Voltage Regulator

Sx460 Diesel Generator Automatic Voltage Regulator

Get Latest Price
Min. Order / Reference FOB Price
1 Piece US $30/ Piece
Port: Ningbo, China
Production Capacity: 100000
Payment Terms: T/T, Western Union, Paypal, Money Gram
of Use:
Diesel Generator
Usage: Standby Unit, Common Units
Output Type: AC Single Phase
Water Cooling
Diesel Generator

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Basic Info

Model NO.
1 Year
After-Sale Service
in Stock
+/- 1.0%
Thermal Drift
0.05% Per Deg. C Change in AVR Ambient (Note 2)
External Voltage Adjustment Thickness
+/-10% with 1 K Ohm 1 Watt Trimmer
Unit Power Dissipation
10 Watts Maximum
Build up Voltage
4 Volts @ AVR Terminals
Typical System Response
AVR Response 20 Ms Filed Current to 90% 80 Ms Mach
AVR Type
Transport Package
Netural Packing
HS Code

General description

SX460 is a half-wave phase-controlled thyristor type Automatic Voltage Regulator (AVR) and forms part of the excitation system for a brush-less generator. In addition to regulating the generator voltage, the AVR circuitry includes under-speed and sensing loss protection features. Excitation power is derived directly from the generator terminals. Positive voltage build up from residual levels is ensured by the use of efficient semiconductors in the power circuitry of the AVR. The AVR is linked with the main stator windings and the exciter field windings to provide closed loop control of the output voltage with load regulation of +/- 1.0%. In addition to being powered from the main stator, the AVR also derives a sample voltage from the output windings for voltage control purposes. In response to this sample voltage, the AVR controls the power fed to the exciter field, and hence the main field, to maintain the machine output voltage within the specified limits, compensating for load, speed, temperature and power factor of the generator. A frequency measuring circuit continually monitors the generator output and provides output under-speed protection of the excitation system, by reducing the output voltage proportionally with speed below a pre-settable threshold. A manual adjustment is provided for factory setting of the under frequency roll off point, (UFRO). This can easily be changed to 50 or 60 Hz in the field by pushon link selection. Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generator's output.

Sx460 Diesel Generator Automatic Voltage Regulator
The main functions of the AVR are: Potential Divider and Rectifier takes a proportion of the generator output voltage and attenuates it. This input chain of resistors includes the range potentiometer and hand trimmer which adjust the generator voltage. A rectifier converts the a.c. into d.c. for further processing. The Amplifier (Amp) compares the sensing voltage to the Reference Voltage and amplifies the difference (error) to provide a controlling signal for the power devices. The Ramp Generator and Level Detector and Driver infinitely control the conduction period of the Power Control Devices and hence provides the excitation system with the required power to maintain the generator voltage within specified limits. The Stability Circuit provides adjustable negative ac feedback to ensure good steady state and transient performance of the control system. The Low Hz Detector measures the period of each electrical cycle and causes the reference voltage to be reduced approximately linearly with speed below a presettable threshold. A Light Emitting Diode gives indication of underspeed running.
The Synchronising circuit is used to keep the Ramp Generator and Low Hz Detector locked to the generator waveform period. The Low Pass Filter prevents distorted waveforms affecting the operation of the AVR. Power Control Devices vary the amount of exciter field current in response to the error signal produced by the Amplifier. Suppression components are included to prevent sub cycle voltage spikes damaging the AVR components and also to reduce the amount of conducted noise on the generator terminals. The Power Supply provides the required voltages for the AVR circuitry.


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