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Phase Sequence Checker for Three Phase Supply
Rs. 5,099
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PROJECT DESCRIPTION

The project is designed to check the sequence of the 3 phase supply. It is very important to know the phase sequence particularly for 3 phase motors. For example, if the 3 phase motor is used for pumping action, any phase reversal accidentally resulting in wrong sequence could force the motor run in the wrong direction. This could result in dry run of the motor to develop permanent fault.

In this project direct 3-phase AC supply 50Hz is fed through voltage drop arrangement duly stabilized by zennor diodes to a logic circuit comprising of NAND gates and OR gates to detect the proper sequence of RYB by series of pulses of fixed duration.

In the event of changing the sequence from RYB to say YBR, the combination of NAND and OR gates develops an output with a missing pulse during the fixed time duration. This pulse is used in triggering an input signal to a 8051 series microcontroller through a timer to drive LEDs placed in a circle. In proper sequence the LEDs run  clockwise having received no triggering.  

While the sequence is not there the triggering is  done which is indicated by LEDs running clockwise for some time and then anti clockwise for the next and so it continues. DC requirement of the circuit is powered from a step down transformer along with a bridge rectifier ,regulators and filter capacitor.

Further this project can be enhanced by providing a relay to circuit to cutoff the supply to the load.

PROJECT HIGHLIGHTS
Digital Phase Sequence Indicator.
Extensive audio-visuals available.
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.
BLOCK DIAGRAM
Hardware Requirements
  • Transformer
  • Diodes
  • Voltage Regulator
  • Capacitors
  • LED
  • Resistors
  • NAND Gate
  • OR Gate
  • 555 Timer
Software Requirements
  • Keil Compiler
  • Language: Embedded ā€˜Cā€™ or Assembly.
Q & A
Q:  What is phase sequence checker?
A:  It checks the order of phase R-Y-B
Q:  Why it is needed?
A:  It is needed to run motor in desired direction
Q:  Where is it applicable?
A:  It is applicable in industries for ensuring right direction of induction motor rotation.
Q:  What happens when any phase is out of sequence?
A:  It will cause the induction motor to rotate in reverse direction, and incase it connected to a pump, this will lead to reverse pumping.
READ WHAT OTHERS HAVE SAID
Average Rating
 4.5/5
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Showing 2 of 2 reviews
Rejoy Suresh Babu., Kollam. on 20th March, 2014, 10:35 AM

Yes, I saw the website and it helps me a lot. My friend referred me to Edgefx. I bought DIY kit and i got tremendous practical hands on experience by assembling the kit. Please improve the code explanation further.

Aditya Kommangini, on 28th April, 2013, 03:35 AM

My friends given best feedback about it; that is the reason selected. Done by own. Quality is good.

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