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Electroplating Rectifiers

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INTRODUCTION :

VIRDI’S Electroplating Rectifier is an economical and most efficient method of obtaining D.C. from A.C. supply by anodizing and many other electro-chemical processes. The widest applications in the field of electro-plating normally requires maximum voltage of 8V, 12V, 16V and 20V D.C. at various current capacities as per requirement. A range of current rating from 50 to 5000 amps is covered in our regular range.(Other ranges available on specific order)
VIRDI'S RECTIFIER FOR RECTIFIER FOR :

    • Electroplating
    • Barrelling
    • Anodising
    • Etching
    • Cleaning & Other Electrochemical Processes

    TECHNICAL SPECIFICATION :

    Input Voltage380/440 Volts A. C. 3 phase 50-1500 Hz
    Output VoltageFixed Rated Maximum D.C. Voltage or variable from zero to
    maximum rated voltage
    Output currentRated maximum D.C. Current.
    Insulation‘A’ Class
    EfficiencyNot less than 98%
    Temp. RiseLess than 45o C ambient at the top of the oil.
    Oil GradeSpecial transformer oil.

    A.C. INPUT :
    VIRDI'S Rectifier is designed for three phase 50 Hz A.C. input supply are suitable for operation at any voltage between 380/415 volts bread crumbs needs to be corrected
    D.C. OUTPUT :
    The D.C. output is variable in steps or continuously and steplessly variable from Zero to its rated full load. VIRDI’S rectifier comprises of the following controls for D.C. output:
    VER-15 Steps Control (range variation from 40% to 100% D.C. output voltage).
    VER-63 Steps Control (range variation from 15% to 100% D.C. output voltage).
    VER-Stepless Control (range variation from 0% to 100% D.C. output voltage).
    VER (S)- (Stepless control with transformer in separate tank).
    The ripple content in the output is very low and is less than 5% and as such these units are very much suitable for all special processes such as chrome plating where low ripple content is necessary.
    CIRCUIT :
    The circuit employed in VIRDI’S Rectifier is simple and universal. A.C. supply is given to an auto-transformer, which in turn supplies a variable voltage to the primary of a three phase double would Delta/Double star connected transformer. The secondary of the transformer is connected to hex a Phase/ Bridge connected rectified using silicon diodes. The output is obtained from the rectifier and the star points of the transformer through an inter phase transformer.
    RECTIFIER :
    This is made up of sturdy liberally rated silicon diodes are connected in parallel. On a special made up of casting heat sink and depending upon the output rating of the rectifier units.
    METER PANEL :
    A moving coil ammeter and a moving iron voltmeter along with indication lamps are provided on a panel indicating the output current. The panel is mounted on one of the tanks to enable easy manipulation.

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