Jan 12, 2018

IMPORTANCE OF ATTITUDE (You can win)-Part-1

IMPORTANCE OF ATTITUDE

Shiv Khera- Part-1

Building a positive attitude

There was a man who made a living selling balloons at a fair. He had all colors of balloons, including red, yellow,

SCADA Systems for Electrical Distribution

SCADA Systems

Nowadays, computer control is one of the most cost effective solutions for improving reliability, optimum operation, intelligent control and protection of a power system network. Having advanced data collection capabilities, SCADA system plays a significant role in power system operation.Typically, at distribution side SCADA does more than simply collecting data by automating entire distribution network and facilitating remote monitoring, coordinate, control and operating distribution components just like in Smart Grid System.

Before knowing distribution automation using SCADA, let us look at what exactly SCADA is and its functioning and what they do in the distribution system.

Concept of PID Theory

Overview

Proportional-Integral-Derivative (PID) control is the most common control algorithm used in industry and has been universally accepted in industrial control. The popularity of PID controllers can be attributed partly to their robust performance in a wide range of operating conditions and partly to their functional simplicity, which allows engineers to operate them in a simple, straightforward manner.

What is MEMS – Microelectromechanical Systems Technology ?

A Introduction to Microelectromechanical Systems (MEMS) Technology

Table of Contents

1 Let us define MEMS!
2 What is MEMS constituted of?
3 Ways of Fabrication of MEMS??
4 Bulk Micromachining:
5 Surface Micromachining:
6 3. High Aspect Ratio Micromachining:
7 Application Areas of MEMS Technology
8 Future with MEMS!

Let us define MEMS!

How PID Controllers Works?

PID Controller is a most common control algorithm used in industrial automation & applications and more than 95% of the industrial controllers are of PID type. PID controllers are used for more precise and accurate control of various parameters.

Electrical Interlocking

What is Electrical Interlocking?

To interconnect the motor circuit in such a way, in which the second motor will not start until the first one run likewise the third one motor will not run unless the second one run and so on. This kind of motor circuit connection is called interlocking.
A simple electrical interlocking control diagram is shown below.

Working of Electrical Interlocking

Automated Fingerprint Identification System ?

Introduction to Fingerprint Identification System

Fingerprint Identification system or Dactyloscopy is a unique process of identification by comparing the fingerprint impressions of individuals. It used the fact no two individuals

Fuse and Types of Fuses

What is a Fuse:

The fuse is an electronic device, which is used to protect circuits from over current, overload and make sure the protection of the circuit. There are many types of fuses available in the market, but function of all these fuses is same.

CALCULATION TOOL(EXCEL)

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Application of Zener Barrier-Complete application-eBook

Application of Zener Barrier-Complete application

A House hold power saving devices has recently received a lot of attention from both consumers and manufacturers. It is generally used in residential homes to save energy and to reduce electricity bills. It is a small device which is to be plugged in any of the AC sockets in the house (Mostly near Energy Meter). Moreover, some of the companies claim that their power savers save up to 40% of the energy.
Many people believe that the claims made by the power saver manufacturing companies are false. Almost all people who buy power savers do it to reduce their electricity bills. Many people who have used these power savers said that they could reduce their electricity bills with the devices; however the reduction was not as much as they had expected. Moreover, they could not figure out if the reduction in electricity bills was due to the power savers or because of their

Types of Neutral Earthing in Power Distribution

Introduction:

In the early power systems were mainly Neutral ungrounded due to the fact that the first ground fault did not require the tripping of the system. An unscheduled shutdown on the first ground fault was particularly undesirable for continuous process industries. These power systems required ground detection systems, but locating the fault often proved difficult. Although achieving the initial goal, the ungrounded system provided no control of transient over-voltages.
A capacitive coupling exists between the system conductors and ground in a typical distribution system. As a result, this series resonant L-C circuit can create over-voltages well in excess of line-to-line voltage when subjected to repetitive re-strikes of one phase to ground. This in turn, reduces insulation life resulting in possible equipment failure.
Neutral grounding systems are similar to fuses in that they do nothing until something in the system goes wrong. Then, like fuses, they protect personnel and equipment from damage. Damage comes from two factors, how long the fault lasts and how large the fault current is. Ground relays trip breakers and limit how long a fault lasts and Neutral

Cable SheathEarthing

Introduction:

In urban areas, high voltage underground cables are commonly used for the transmission and distribution of electricity. Such high voltage cables have metallic sheaths or screens surrounding the conductors, and/or armour and metallic wires surrounding the cables. During earth faults applied to directly earthed systems, these metallic paths are expected to carry a substantial proportion of the total fault current, which would otherwise flow through the general mass of earth, while returning to system neutrals. These alternative return paths must be considered when determining the extent of the grid potential rise at an electrical plant due to earth faults.
For safety and reliable operation, the shields and metallic sheaths of power cables must be grounded. Without grounding, shields would operate at a potential considerably above ground. Thus, they would be hazardous to touch and would cause rapid degradation of the jacket or other material intervening between shield and ground. This is caused by the capacitive charging current of the cable insulation that is on the order of 1 mA/ft of conductor length.
This current normally flows, at power frequency, between the conductor and the earth electrode of the cable, normally the shield. In addition, the shield or metallic sheath provides a fault return path in the event of insulation failure, permitting rapid operation of the protection devices.

HIPOT Testing

What is HIPOT Testing (Dielectric Strength Test):

Hipot Test is short name of high potential (high voltage) Teat and It also known as Dielectric Withstand Test. A hipot test checks for “good isolation.” Hipot test makes surety of no current will flow from one point to another point. Hipot test is the opposite of a continuity test.

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Jan 12, 2018

Shiv Khera- Part-1

Building a positive attitude

There was a man who made a living selling balloons at a fair. He had all colors of balloons, including red, yellow,

Jan 11, 2018

1.What is frequency respons?

Jan 10, 2018

SCADA Systems

Jan 9, 2018