Satyadev Vyas
  • Chittorgarh, Rajasthan
  • India
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Latest Activity

Satyadev Vyas posted blog posts
Jun 24
Satyadev Vyas posted a blog post

True Power Factor

True Power Factor :In a harmonic rich network, the over all power factor of the electrical network not only depends on the displacement power factor but it also depends on the harmonic distortion in the electrical network. The true power factor is a product of displacement and distortion power factor.The true power factor is calculated using the following formula.True power factor = Displacement power factor * Distortion Power factor            = CosФ * 1/ (√ 1 +THD^2)The true power factor gets…See More
Jun 9
Satyadev Vyas replied to Richard's discussion Benefits of variable frequency drives (VFDs, frequency inverters) (part 2)
"The huge energy can be saved if the VFD is installed for fan and pump application. Also, the process control becomes better with use of VFDs. The higher electric and mechanical stress can be avoided as the V/F ratio is increased gradually."
Jun 5
Satyadev Vyas replied to Ramakrishnan Pravin's discussion Why DC motors are not used in lifts ?
"The separately excited DC motor can be used for lift operation as it can deliver high starting torque and better speed regulation. The Squirrel cage motor with VFD operation is best suited for lift operation. "
Jun 5
Satyadev Vyas posted a blog post

Why induction motor takes high starting current?

The induction motors are widely used worldwide for various applications.The motor takes high starting current at start.When the three phase supply is fed, a rotating magnetic field set up in the air gap.The flux get linked to the rotor winding and voltage is induced in the rotor conductor.The magnitude of the induced voltage depends on the difference between the synchronous speed and the actual speed of the motor.At start, this difference is maximum and equals to 1. We can say the slip of the…See More
May 28
Satyadev Vyas posted a blog post

Polarization Index Test -PI Test

The polarisation index test of electrical insulation is the key criteria for testing the healthiness of electrical system. The failure of the insulation cause the device to fail. The insulation resistance value goes down as the temperature increases. The insulation resistance gets halved with  every increase in temperaure by 10 degree centigrade.The moisture also cause the insulation failures. The checking of insulation resistance is one of the method for ensuring healthiness. However, it is…See More
Apr 28
Satyadev Vyas posted a status
"What is the Knee Point Voltage of current Transformer and How to calculate it?"
Apr 22
Obakore Jude Oloya left a comment for Satyadev Vyas
"Hello"
Apr 20
Satyadev Vyas posted a status
"Why V/f ratio is kept constant for induction motor?…"
Apr 19
Satyadev Vyas posted blog posts
Apr 19
Satyadev Vyas posted a status
"Knee point voltage of CT Read More:…"
Apr 19
Satyadev Vyas posted a status
Apr 19
Satyadev Vyas posted a blog post

CT Grounding practices- CTs must be grounded at a single point- Why?

The CTs must be grounded at the single point. The grounding of the CTs at the multiple points lead to the voltage of different magnitude at two points. The realy used for the differential protection may operate when the fault is outside of the protection zone.Read More:https://sdvelectrical.blogspot.com/2018/11/current-transformer-secondary-grounding.html?m=1See More
Dec 29, 2018
Satyadev Vyas posted a status
Dec 29, 2018
Satyadev Vyas posted a status
Sep 28, 2018
Satyadev Vyas is now a member of The Engineering Exchange
Sep 28, 2018

Profile Information

Company
Birla Corporation Limited
Job Title
General Manager(E&I)
Industry
Cement
Your Engineering Focus
Electrical and instrumentation
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Satyadev Vyas's Blog

Transformer Over Fluxing Protection

Posted on June 24, 2019 at 9:44pm 0 Comments

The cooled rolled grain oriented(CRGO) core is used in the transformer. The flux produced in the primary travels through the magnetic core and gets linked to the secondary. The maximum flux density of the CRGO core is 1.9 Tesla and if the core is magnetized above the rated capacity, the core gets saturated. The saturation of the core cause heating in the core and the other parts of the transformer. The flux density in the core should not increase above the…

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Significance of back EMF in DC Motor

Posted on June 24, 2019 at 5:30am 0 Comments

When the DC voltage is applied to the armature of the DC motor,the motor draws enormously high current at the starting time and it decrease as the motor accelerates.Why the DC motor draws high armature current at the starting and how the current get decreased as the motor accelerates is because of the counter potential force developed across the armature winding. The counter voltage induced across the armature winding is called the back EMF. 

The counter EMF…

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True Power Factor

Posted on June 9, 2019 at 10:22pm 0 Comments

True Power Factor :

In a harmonic rich network, the over all power factor of the electrical network not only depends on the displacement power factor but it also depends on the harmonic distortion in the electrical network. The…

Continue

Why induction motor takes high starting current?

Posted on May 28, 2019 at 11:44pm 0 Comments

The induction motors are widely used worldwide for various applications.The motor takes high starting current at start.When the three phase supply is fed, a rotating magnetic field set up in the air gap.The flux get linked to the rotor winding and voltage is induced in the rotor conductor.The magnitude of the induced voltage depends on the difference between the synchronous speed and the actual speed of the motor.At start, this difference is maximum and equals to 1. We can say the slip of the… Continue

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At 12:30am on April 20, 2019, Obakore Jude Oloya said…
Hello
At 10:41am on March 13, 2019, Joy said…

Good Day,

How is everything with you, I picked interest on you after going through
your short profile and deemed it necessary to write you immediately. I have
something very vital to disclose to you, but I found it difficult to express
myself here, since it's a public site.Could you please get back to me on:
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Stella.

 
 
 

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