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Description:In addition to rregulating the generator voltage,the avr circuitry includes under-speed and sensing loss protection features.Excitation power os derived directly from the generator terminals.
Positive voltage build up from residual level 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 regulator of +/-1.0%.
In addition to being powered from the main stator,the avr also derives a sample voltage from the output windings for coltage 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.
Provision is made for the connection of a remote voltage trimmer,allowing the user fine control of generator's output.
Features
Technical specification | |
Sening input | |
Voltage |
Jumper selectable 100-130V ac 1 phase or |
190-264V ac 1 phase | |
Frenquency |
50-60Hz nominal |
Power input | |
Voltage |
100-264V ac 1 phase |
Frequency |
50-60Hz nominal |
Output | |
Voltage |
82V dc @200V ac |
Current |
continuous 4A |
transient 7.5A for 10 secs | |
Resistance |
15 ohms min |
(10 ohms min when input volts i s less than 175ac) | |
Regulation |
+/-1.0% |
Thermal Drift |
0.03% per deg. C change in AVR ambient |
Typical System Response |
AVR response 20ms |
Field current to 90% 80ms | |
Machine Volts to 97% 300ms | |
External Voltage Adjustment |
/-10% with 1 k ohm 1 watt trimmer |
Increasing resistance lowers voltage | |
Under frequency Protection |
Set point 94-98% Hz |
Unit power Dissipation |
12 watts maximum |
Build Up Voltage |
4 Volts @ AVR terminals |
Analogue input |
Maximum input +/-5V dc |
Sensitivity 1V for 5% Generator Volts(adjustable) | |
input resistance 1k ohm | |
Quadrature Droop input |
10 ohms burden |
Max. sensitivity: 0.07A for 5% droop 0 PF | |
Max. input: 0.33A | |
Over Excitation protection |
Set point 75V dc |
Time delay 10-15 seconds(fixed) | |
Environmental | |
Vibration |
20-100Hz 50mm/sec |
100Hz-2kHz 3.3g | |
Relative Humidity 0-70C |
95% |
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