Phase Sequence Checker for Three Phase Supply
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.
- Easy to use, Self-explanatory kit.
- All-inclusive solution kit.
- Extensive audio-visuals available.
- Branding-free material.
- Pre-programmed Microcontroller.
- Digital Phase Sequence Indicator.
- Call/mail for Tech Support from 10 am - 7 pm.
- Can be Customized for Arduino, Raspberry Pi, PIC
- Voltage Regulator
- NAND Gate
- OR Gate
- 555 Timer
- Keil compiler
- Language: Embedded C or Assembly
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In my engineering days, we used to struggle replicating a PCB model from our text books with real tools. We had a tough time with the circuits and most of the time - they used to fail. So I wanted to solve this problem not just for myself but for all my fellow students like you. Young, energetic and knowledgeable youth who really want to learn but still cannot afford to fail with the project because it matters and the colleges rarely help us out productively.
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"I live in Hyderabad, a place that is known for engineering colleges. Went with frnd and bought a set from Ameerpet(tht hs rdymade stuff like this) and it failed just b4 viva. Thats when we got this thx to a senior who is sorta like a geek.. and let me tell u.. Its one reason why me and my frnds got thru the final sem. Works great and is useful too later.. "Ravi Teja
Order No: HYF1290
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Order No: BLR2933
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Order No: BQF3698
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.
Q: Which microcontroller is used in this project?
A: A 20 pin microcontroller from 8051 family is used in this project.
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.