Specifications
Generator parts AVR 6GA2 490-0A
1): Perfect quality and reasonable price
2):Siemens AVR: 6GA2 490-0A and 6GA2-491
Specifications
1. OEM service is ok.
2. Factory directly sales.
3. Certification: ISO9001,CE,CSA
4. Delivery time: 3 days
1. Simens AVR 6GA2 490-0A
1. High quality and best price
2. Good reputation and service
3. Fast delivery time
4. MOQ: 5PCS
2.Packaging & Delivery Packaging
Plastic bag and Carton
Delivery Detail: 3days
3.Technical Specification
| 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 uese 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 |
| 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. |
