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Three Phase Solid State Relay with ZVS
Model: 8    
Rs. 7,599
50 in Stock
Rs. 5,499
50 in Stock
Rs. 4,499
46 in Stock

The project is designed for a three phase solid state relay system. It incorporates three single phase units where each phase is controlled individually by a power triac with RC snubber network for zero voltage switching.

Opto-isolators are used for each phase to receive switching signals from a microcontroller of 8051 family. Loads are connected in series with a set of triacs being driven by the opto-isolator. The microcontroller is designed to generate output pulses after zero voltage pulse to ensure that the load is getting switched on at zero cross of the supply waveform.

The zero crossing feature of the TRIAC driver, (an opto-isolator) ensures low noise generation thus avoiding sudden inrush of current on resistive and inductive loads. Here in this project we are using two push buttons for generating output pulses from the microcontroller randomly, not coinciding with zero voltage supply voltage of the waveform.

Using a CRO or a DSO we can see the waveform of the voltage supplied to the load for verifying the switching of the load at the zero voltage point.

Further the project can be enhanced by using 2 back to back SCRs ,in each phase for heavy load switching as used in industries. Over load and short circuit protection can also be incorporated for higher reliability.

Load Switch @ Zero Voltage.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm.
Pre-programmed Microcontroller.
All-inclusive solution kit.
Easy to use, Self-explanatory kit.
Extensive audio-visuals available.
Hardware Requirements
  • 8051 series Microcontroller
  • Opto-isolator
  • Triacs
  • Transformers
  • Diodes
  • voltage regulator
  • push button
  • LED
  • Resistors
  • Capacitors
  • Crystal
  • Lamp
Software Requirements
  • Keil compiler
  • Languages: Embedded C or Assembly
Q & A
Q:  Which microcontroller is used in this project?
A:  8051 family 40 pin microcontroller is used in this project.
Q:  What is the concept of this project?
A:  The concept is to switch on the load at zero crossing point using opto coupler and thyristor. The signals can be observed on any Digital Storage Oscilloscope.
Q:  What is the formula for calculating smoothing capacitor value?
A:  There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.
Q:  What to do when the lamp fails and what is the maximum lamp rating that can be used?
A:  If the lamp fails one can use any lamp or bulb which is used in homes up to 100W. We suggest you to go for low watt bulbs.
Average Rating
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Showing 2 of 2 reviews
Kartik Gupta , Faridabad on 3rd January, 2015, 11:00 AM

My Teacher suggested, so that I purchased. I am from ITM University, Gurgaon, Haryana.I found the full description on website, so I purchased and I like components, diagram & description given in CD.Kit was delivered on time with the right components.I directly placed order online.Everything is perfect. I will also give you references.

Nachiket Jagdish, Rajasthan on 7th May, 2014, 04:39 PM

I decided to buy a kit from Edgefx because i was impressed by seeing your website and the concept of the project. I bought a project kit from Edgefx and it was good and we gained practical knowledge.Everything about Edgefx is good.

Rating Breakdown (2 Reviews)

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