Induction Motor Protection System

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  • Induction Motor Protection System

Induction Motor Protection System

Product Description

The project is designed to protect an induction motor from single phasing and over temperature. Providing a protection system is very important in industries, using lot of motors such that production is not hampered owing to failure of any motor.

The basic idea for the development of this project is to provide safety to the industrial motor/pump/lift Motor etc. If any of the phases, out of the 3 phases is missing or if the temperature of the motor during operation exceeds the threshold value, motor stops immediately.

The system uses a 3-Phase power supply where three single phase transformers are connected to it. If any of the phases is not available the corresponding transformer stops supplying power to the circuit. This leads to one of the four relays getting switched OFF.

The main relay which is powered through a set of four relays gets disconnected because of one relay not being powered. Thus the main relay that delivers 3 phase supply to the motor gets disconnected. A thermistor is connected to the motor body to sense the temperature. If the temperature increases then supply to the fourth relay is disconnected.

Further the project can be enhanced by using current sensors for over load protection and phase sequence sensor for protecting the motor from applying wrong phase sequence. 

Project Highlights

  • Easy to use, Self-explanatory kit.
  • All-inclusive solution kit.
  • Extensive audio-visuals available.
  • Branding-free material.
  • Automatic Motor Protection.
  • Non-Microcontroller Project.
  • Call/mail for Tech Support from 10 am - 7 pm.
  • Can be Customized for Arduino, Raspberry Pi, PIC

Block Diagram

Hardware Requirements

  • OPAMPs
  • Resistors
  • Capacitors
  • Diodes
  • Thermistor
  • Transformers
  • Regulator
  • Relays

Software Requirements

  • None

User Reviews

electronicshub

"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
electronicshub

"A must-buy. It helped me practice in real time and learn how to make a project by looking at an actual workable unit. (fyi - you get a fully built unit and another full set of components to build another by yourself) so it was great value for us. We shared the costs by 3 (our team for the project) but i got to keep my unit as the other two kept the original. Showed it for my on-campus and got thru too becuase it not just looked neat and profesionally bt worked great later. (still have it in my room, now working with GE in Bangalore) "

Anusha
Order No: BLR2933
electronicshub

"We have used it for our institution - it is available in lab and has been good for explaining various models in live during class. Strongly suggest every college dept to have it for labs as it is working well - even with regular use at lab for more than 1 year. Note:We got the unit complementarity before launch in 2014 and have later purchased few batches. The team behind it is professional and know what electronics students need and i am writing this review on their request on 13/05/2016"

Mr. Ramesh Kumar Jha
Order No: BQF3698

Q&A

Q:  What is induction motor protection?

A:  Protecting the Induction motor from single phasing and over-temperature is known as induction motor protection.

Q:  What is the rating of motor used in this project?

A:  A 3 phase, ¼ HP motor is used in this project.

Q:  Is single phasing protection available?

A:  Yes, single phasing protection is available.

Q:  Why are 6 lamps used?

A:  A series of two lamps are used to represent each phase. 2 lamps are connected in series to ensure safety.

Q:  What is the three phase induction motor rating to be used?

A:  Three phase induction motor can be used, but limited up to 1 HP only as it uses a relay of 6A contact rating only. For higher HP just use a contactor of appropriate rating. The 230 AC coil of the contactor is powered in series from one of the contacts of the relay.

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.

Q:  In this project six bulbs are used but i want to use 3 phase induction motor instead. Is it possible? If yes then what will be the rating of that motor and what will be the cost?

A:  You can use a three phase induction motor but limited up to 1 HP only as it uses a 3CO relay of 6 A rating only. For higher HP just use a contactor of appropriate rating the coil of which is driven by the relay on board.

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