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Newage SX460 Automatic Voltage Regulator AVR
E000-24602, ONAN 305-0982

  Newage SX460

NEWAGE SX460 AVR FOR NEWAGE ALTERNATORS

NEWAGE E000-24602, E000-26000, 450-13900 

ONAN 305-0982, 305-0949


 

General Description / Specifications

 

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 +/- 1.5%.

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.

General Characteristics  

INPUT

    > Voltage Jumper selectable 95-132V ac or 190-264V ac
    > Frequency 50-60 Hz nominal
    > Phase 1

OUTPUT

    > Voltage max 90V dc at 207V ac input
    > Current continuous 4 A dc Intermittent 6 A for 10 secs
    > Resistance 15 ohms minimum

REGULATION
    > +/- 1.5%

THERMAL DRIFT

    > 0.05% per deg. C change in AVR ambient

TYPICAL SYSTEM RESPONSE

    > AVR response 20 ms
    > Filed current to 90% 80 ms
    > Machine Volts to 97% 300 ms

EXTERNAL VOLTAGE ADJUSTMENT

    > +/-10% with 1 k ohm 1 watt trimmer

UNDER FREQUENCY PROTECTION

    > Set point 95% Hz
    > Slope 170% down to 30 Hz

UNIT POWER DISSIPATION

    > 10 watts maximum

BUILD UP VOLTAGE

    > 4 Volts @ AVR terminals

ENVIRONMENTAL

    > Vibration 20-100 Hz 50mm/sec
    > 100Hz – 2kHz 3.3g
    > Operating temperature -40 to +70°C
    > Relative Humidity 0-70°C 95% (see note 5)
    > Storage temperature -55 to +80°C

NOTES
1. With 4% engine governing
2. After 10 minutes.
3. Applies to Mod status F onwards. Generator de-rate may apply. Check with factory.
4. Factory set, semi-sealed, jumper selectable
5. Non condensing.

Standard Applications

Stamford Alternator BC16, BC18, UC22, UC27

InGENERAL POWERwe understand the urgency of your requirements for emergency and back up generators, and we have committed by establishing automatic voltage regulator stock of 500+ units in Miami Florida generator stock of 300+ units in Miami Florida currently serving:

      

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TECHNICAL INFORMATION AND RESOURCES

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STANDARD TERMS & CONDITIONS:
NEW and ORIGINAL parts
Each unit prototype and individually tested from factory prior to shipping
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GENERAL POWER LIMITED
1350 NW 78 Avenue
Miami, FL 33126, USA
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