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(via Limit Switches Explained - Working Principles & Types | RealPars)

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What is a Redundant Power Supply and How Does It Work?

The electrical components inside enclosures that house industrial automation systems like PLCs often operate on a 24 volt power supply. So in these enclosures we usually need one or several power supplies that each have a 24 volt output voltage. But in some applications where ultra-reliability is essential, and an unexpected loss of power would be disastrous we need to use “redundant power supplies”.   In this video we’re going to learn exactly how these types of power supplies work from a practical perspective.

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STAR-DELTA STARTER PLC PROGRAM AND WIRING _ PART 3

This is the third video of “star-delta starter PLC program and wiring video series”.

The basic concept of star-delta starter is to first run the motor in the star connection for a few seconds to reduce the start current. Then when the motor has gained sufficient speed, change the winding connections to delta.

In this video you’re going to learn the wiring of star-delta starter.

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STAR-DELTA STARTER PLC PROGRAM AND WIRING _ PART 2

This is the second video from the “star-delta starter PLC program and wiring” video series. As I stated, my aim is to make this an easy to follow and enjoyable training experience so before diving into the wiring of a star-delta starter, I’d like to teach you a little bit about what a contactor is and how it actually works.

In this video, using a simple and effective animation, you are going to learn what the main parts of a contactor are and how it can help you to turn on and off the industrial equipment.

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STAR-DELTA STARTER PLC PROGRAM AND WIRING _ PART 1

We have designed a brand new video series in PLC programming here at RealPars which can teach you some valuable practical concepts in automation and electrical engineering. In this video series, you’re going to learn how to write a PLC program for a three phase electrical motor that will utilize a star-delta starter.

The star-delta starter is a common method used in starting heavy three phase motors. Although there are other new ways of starting heavy duty motors, you can still benefit from learning this popular traditional method as an automation engineer.

Here is the basic idea. When you turn on a three phase motor, in the first few minutes of starting the motor, it draws up to 4 times more current than the rated current. This huge amount of current can damage the motor windings and also the electrical network. In the star-delta starter, we first run the motor in star connection and then after a few minutes, when the motor gains sufficient speed, we’ll switch the connection to delta. In star connection the current that the motor draws is one third of the rated current so by running the motor in star connection we can reduce the startup current.

This is the first video of this series. In this video you’re going to learn what the star-delta starter is and how can it help you run your three phase motor safely.