Rectifier Units For Electroplating & Anodising
These Rectifier units are suitable for all electrode position processes within their ratings. The widest applications in the field require maximum voltage of 8V, 12V, 16V, 20V and 24V D.C. at various current capacities as per requirement. A range of current ratings from 50 Amps to 5000 Amps is covered in our regular manufacture. Our standard sizes are listed in the price list issued separately.
Brief Specifications:
Input Voltage : 440V A.C., 3 Phase 50 Hz
Output Voltage : Continuously Variable from zero to the full rated D.C. Voltage
Output Current : Rated maximum D.C. current
Efficiency : Not less than 95%
Temperature Rise : Less than 55 C above ambient at the top of the oil
Class of Insulation : ‘A’
A.C. Input :
Weeco Electroplating Rectifier units are designed for three phases, 50 Hz. AC. Input supply and are suitable for operation at any voltage between 380 to 440 volts. Thus it covers a wider range to cater for mains voltage fluctuations. The input to the unit is to be connected through a switch-fuse unit of proper rating, which is not included in the scope of the supply and has to be procured separately.
D.C. Output :
The D.C. output is continuously and stop loss variable from zero to the full rated voltage for any input voltage between 380 to 440 volts and for any load between zero to its rated full load. The ripple content in the output is very low(approximately 5 %) and as such these units are very much suitable for all special process such as chrome plating hard chrome plating where low ripple content is necessary or anodizing.
Circuit and Components :
The circuit employed in these rectifier units is simple and universal. Supply is given to continuously variable voltage transformer, which in turn supplies a variable voltage to the primary of a three phase double wound Delta/Double star connected transformer through H.R.C. fuses. The secondary of the transformer is connected to Hexa-Phase connected rectifier using Silicon Diodes. The output is obtained from the rectifier and the star points of the transformer through an inter phase transformer. Moving coil voltmeter and ammeter with shunt are provided to measure the output voltage and output current.
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