SVR Card:
Our answer to the previous architecture of the SVR Card encountering regular faults, used in the power conditioning units at telecom sites, was a major transformation from electrical device based cards to electronics. This required much less space as compared to the existing SVR Card having 5 child Cards installed in it, plus the added advantage of electronic voltage regulators provide the benefits of accuracy of control, high speed response, high reliability and minimum maintenance.
DG alternator output signal received through a potential transformer (PT) is first rectified, compared with the stored reference voltage VREF and then amplified with the help of error amplifier and power amplifier stages. Amplified error signal thus obtained is supplied into the exciter field which provides the excitation for alternator such that the terminal voltage of the alternator remains constant.
The stabilising transformer gives feedback of exciter voltage for improving dynamic response. Earlier the electrical regulators used to employ coils with steel cores but the advent of semiconductors made the valve type regulators obsolete. Our latest SVR Card is an electronic regulator using the state of art ICs to do the job in best possible way.
SVR Card (New version)
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