| Model: | 6GA2490-0A |
|---|---|
| Brand: | Siemens |
| Origin: | Made In China |
| Category: | Industrial Supplies / Machinery / Power & Generating Sets |
| Label: | Generator parts , 6GA2 490-0A , generator spare part |
| Price: |
US $200
/ pc
|
| Min. Order: | 1 pc |
| Live Chat: |  | Last Online:13 Mar, 2023 |
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. |
