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Archive for the ‘Electrical Engineering Articles’ Category


Agilent Technologies Enhances Software Development Tools for Electronic Instrument Automation and Control

Agilent Technologies inc. released the enhanced Agilent Command Expert and IO Libraries Suite, software tools that accelerate the development of automated electronic  instrument connection and control for many PC applications. the enhanced software allows users to more easily access the key features of their instruments. It even enables them to run an instrument control sequence with a single line of MATLAB code.

“MATLAB software, available from both Agilent and MathWorks, enables engineers to solve complex design, testing and verification challenges,” said Roy Lurie, vice president of engineering for MATLAB products at MathWorks.  “Agilent Command Expert’s new integration with MATLAB and our Instrument Control Toolbox enables standard command sequences generated from Command Expert to be available immediately in MATLAB, where they can be modified or executed. This integration allows MATLAB users to get Read more »

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PROVISIONS REGARDING SAFETY HAZARDS/METER INSTALLATION

have youdone yoursafety checkPublic Awareness Bulletin -5PROVISIONS REGARDING SAFETY HAZARDS/METERINSTALLATIONLEAKAGE ON CONSUMER’S PREMISESAs per Clause 37(I) of Supply Code and Performance Standards Regulations, 2007, if Earth Leakage? LED indicator, provided on electronic meters, is found ‘ON’ then it shall be the duty of Licensees’ meter reader, who checks the meter every month, to inform the consumer that there is leakage in the premises and advise him to get his wiring checked and leakage removed. He shall also inform concerned district manager? Division manager about the leakage. The consumer may take prompt action to check leakage and avoid higher consumption and safety hazards.

USE OF EARTH LEAKAGE PROTECTIVE DEVICESection 61A of The Indian Electricity Rules, 1956 states that the supply of energy to every electrical installation Read more »

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Static Dissipators and Grounding Towers For Lightning Protection

While the incidence of lightning strikes varies, virtually all populated regions have some lightning exposure hazard. Taken over the lifetime of typical tower and antenna systems, there is meaningful risk worldwide, and it makes sense to at least minimally protect facilities outside of lightning belts. In areas of intense lightning risk, extreme protection measures are mandatory

The largest classes of technical structures needing lightning protection in the world today are wireless communications and broadcast towers and their antennas.

In less than 20 years, cellular mobile towers have proliferated on every continent, and are perfect lightning targets to a lesser extent, AM, FM, and TV towers have also sprouted, sometimes sharing with cell systems. not only are the towers at Read more »

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Study of Numerical Overcurrent Relay – 1:General Seminar Topics

Study of Numerical Overcurrent Relay   Indika_NumericalRelay.docx (Size: 74.26 KB / Downloads: 2) DISCUSSION• Three stage over current Characteristics of the KCGG relayThree stages of KCGG relay is shown above and this relay is used for time graded over current and earth fault protection. These stages have threshold limits and time delays which are independent from each other furthermore, for phase faults and earth faults separate settings have defined (for phase faults – I>, earth faults – Io>). Relay operates when the power frequency component of the current exceeds the set threshold. These elements may be set as a low set overload protection and may be expected to have relatively long associated time delays. In the first stage several inverse time curves and definite time Read more »

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Test

TestsVerification Of Polarity

Check that all single-pole switches, thermostats, and other control devices are in the live side.

The polarity test is also made to ensure that the outer contacts of centre-contact byonet and Edison-type srew lamp-holders are connected to the neutral and that wiring has been correctly connected to plugs and socket-outlets.

Crossed polarity, sometimes termed ‘Switched Neutral’, is one of the major causes of severe electrical accidents.

Line-earth and Neutral-earth Loops.

Aim: to ensure that the loop impedance is low enough to ensure and allow sufficient current, in the event of an earth fault, to operate the protective device.

Earth-continuity Conductor

Earth Continuity test on the Continuity Conductor of AC installations.

After allowance has been made for the resistance of Read more »

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Low-voltage a current transformer ‘ The electricity is used) Type: DTL71-30II-200/5 / China

Brand: Midwest

Name: Low-voltage a current transformer ‘ The electricity is used) Type: DTL71-30II-200/5 / China

Type: DTL71-30II-200/5 / China

About products:

The intersection of products and the intersection of characteristic and 5000A, 5A- of primary current, the intersection of secondary current and 5A, complete in specifications, 0.2, 0.5 full coverage and 1 three accuracy class; The used core undergoes high vacuum heat treatment, of good performance, the precision is steady; The outer cover is made of high-impact inflaming retarding ABS material, have good safety performance, handsome in appearance; It is convenient to install, can adopt the bent piece fixedly, the presser plate is fixed; The characteristic accords with GB1208-1997 ” current transformer ” technical standard.

The products are detailed: Read more »

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#1: Cheap Price Leviton P1024-12L Horizontal Power Distribution Unit 208 Volt 20 Amp NEMA L6-20P Locking Plug Type, 12 Receptacles with 12 ft. Power Cord, Black for Sale

The Cheapest Price is here, buy now & Save More best Price Leviton P1024-12L Horizontal Power Distribution Unit 208 Volt 20 Amp NEMA L6-20P Locking Plug Type, 12 Receptacles with 12 ft. Power Cord, Black Sales

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Unmetered horizontal power distribution unit 208V 20A, 12 receptacle, L6-20P plug type Resettable circuit breaker to provide overload protection 12 receptacles – C13 LED indicators for power and ground/polarity Mounts horizontally on 19-Inch racks or cabinets (physical dimensions: 1.75-Inch H x 17.5-Inch W x 4.5-Inch D) Backed by Leviton’Unmetered horizontal power distribution unit 208V 20A, 12 receptacle, L6-20P plug type Resettable circuit breaker to provide overload protection 12 receptacles – C13 LED Read more »

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Capacitor banks Protection

1.     Problem Statement

Frequent failure of LT Power Factor Improvement capacitors installed in the premises of 12 no. VFD’s and 2 no. 6.3 KV 400KW motors has been observed, although their protection is designed carefully considering load parameters

1.1 possible Reasons

It is assumed that this failure is due to the Harmonic Resonance, transients generated during the startup of MV motors or the harmonic resonance between the capacitive and inductive reactance of the system or any other factor.

2.    Aims & Objectives

The above said problem is occurred in a local cement industry and retaining after the commissioning of new substations. Hence these points should be considered;

Recording Harmonics and transients in normal and transition conditions using Power Quality Meters and calculating other parameters.Modeling whole substation in NEPLAN software to analyze ideal Load parameters.Measuring Equivalent Series Resistance (ESR) of Read more »

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Magic Power – Finding Your Magical Power Source

Magic is an ancient tool that is powered by the desire and drive to connect with the universe through nature and influence the surrounding environment. It is also a tool that is used to achieve one’s goals and dreams. There are many different forms of magic and magical practices, but they are all connected by similar basic principals.

Most basic magical theory agrees that everything is connected through the energies that bind the universe as one solitary entity. We are all a part of this unified whole. On a certain level, every single particle of matter and energy throughout the cosmos has some effect upon the rest within the continuum of space-time. Simply put, everything and everyone in the universe is connected and a part of everything else. There is no separation. Separateness Read more »

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BMW X6 ActiveHybrid 2010, all details

The interesting BMW X6 ActiveHybrid is a reality. This new hybrid variant of the German model has a gasoline engine and electric motor that together give a maximum power of 485 hp and torque of 780 Nm.

has a supercharged V8 petrol engine of 408 hp (the same as the xDrive50i) and two electric motors 91 and 86 hp. One is 67 kW (91 hp) and 260 Nm and the other 63 kW (86 hp) and 280 Nm.

This accelerates from 0 to 100 km / h in 5.6 seconds and consumes 9.9 l/100 km. Top speed is limited to 236 km / h (250 km / h with sports package). with the electric motor reaches 60 km / h and up to 2.5 km.

The X6 ActiveHybrid is what is called full Hyb, means you can travel only in electric mode, Read more »

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