6GA2 490-0A Automatic Voltage Regulator for Siemens 1FC4 & 1FC5 Series Generator
Product Description
6GA2 490-0A Automatic Voltage Regulator for Siemens 1FC4 & 1FC5 Series Generator
brushless
accurately regulate the voltage
Automatic Voltage Regulator 6GA2 490-0A for Siemens 1FC4 &1FC5 Series Generator
Thyristor Voltage Regulator
A thyristor voltage regulator was fitted so as to upgrade the ± 5% voltage tolerance previously achieved to ± 0.5%. The regulator in question is a pure voltage regulator, which uses the excitation current to keep the generator voltage constant irrespective of the load.
The generator voltage is fed via the measuring circuit transformer to the regulator and rectified by a load-side rectifier bridge. The actual value signal and regulator input voltage are derived from this DC voltage. The voltage setpoint is input via an internal reference value potentiometer or external reference value setter. After an internal setpoint/ actual value comparison, the regulator amplifier outputs a DC voltage, which is converted by a loadside pulse generator into a firing pulse with adjustable time offset for the bypass thyristor.
The bypass thyristor Vabs is situated in the excitation circuit between one phase and the anode-side output of the rectifier bridge in series with the bypass resistor Rabs (Fig. 4). The bypass circuit, parallel to excitation winding RE, is switched on in the time ranges at which valve V5 is conductive. Part of the excitation current can therefore be made to bypass the excitation winding. This takes place within every period for a fraction of that period (control angle). The excitation current is reduced in accordance with the control angle and the resistance ratio Rabs/ RE.
Application range will be as follows:
6GA2 490-0A
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For 1FC4 & 1FC5 Series Siemens Generator
|
6GA2 491-1A
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For 1FC6 Series Siemens Generator
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6GA2 492-1A
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For 1FC6 Series or above 200kw Siemens Generator
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we also supply the following products:
Stamford Automatic Voltage Regulator(AVR): MX341 MX321 SX460 SX440 AS440 AS480
Leroy Somer AVR:R230 R250 R448 R449 R438
Marathon AVR:SE350
Mecc Alte AVR:SR7
General AVR:AVR-15A AVR-12A AVR-8A
Caterpillar AVR:VR6
Siemens AVR:6GA2 490-0/1A
MARELLI AVR: M16FA655A M40FA640A
Please feel free to contact us:ula(at)china-avr(dot)com
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