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TD_SX460.GB_04.05_05_GB

SX460 AUTOMATIC VOLTAGE

REGULATOR (AVR)

SPECIFICATION, INSTALLATION AND ADJUSTMENTS

General description

Technical specification

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 push-

on link selection.

Provision is made for the connection of a remote voltage

trimmer, allowing the user fine control of the generator's

output.

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

+/- 1.0% (see note 1)

THERMAL DRIFT

0.05% per deg. C change in AVR ambient (note 2)

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 (see note 3)

UNDER FREQUENCY PROTECTION

Set point 95% Hz (see note 4)

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.

1 2 3 4

Résumé du contenu

Page 1 - REGULATOR (AVR)

TD_SX460.GB_04.05_05_GB SX460 AUTOMATIC VOLTAGE REGULATOR (AVR) SPECIFICATION, INSTALLATION AND ADJUSTMENTS General description Technical spe

Page 2 - DESIGN DETAIL

DESIGN DETAIL TD_SX460.GB_04.05_05_GB The main functions of the AVR are: Potential Divider and Rectifier takes a proportion of the generator out

Page 3 - FITTING AND OPERATING

FITTING AND OPERATING TD_SX460.GB_04.05_05_GB Remove link to connect a remote voltage trimmer

Page 4

FITTING AND OPERATING TD_SX460 AVR GB_04.05_06_GB Barnack Road • Stamford • Lincolnshire • PE9 2NB Tel: 00 44 (0)1780 484000 • Fax: 00 44 (0)1780 4

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Winco SX460 Manuel d'utilisateur

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