Electric Motor
Selection Of Crane Duty Motors (Part 1)
The operating conditions such as duty cycle, startup, temperature and operating environment are vital considerations in the motor efficiency and reliability. It is absolutely essential to match the motors to… Read more
Jul 22, 2013 | By Ashok Parikh
Energy and Power
Micro Hydro Power Plant With Automatic Frequency and Excitation Control
First of all, I am very glad to say that our project was successful. It is hydro power plant which was completed totally by our five members team namely me,… Read more
Jul 19, 2013 | By Aakash Johari
High Voltage
Commissioning of HV Panel – Operational and Functional Checkup
The main objective of the test is to check the proper operation function of the circuit breaker; in this test we do the following: This test is conducted by manual,… Read more
Jul 17, 2013 | By Edvard Csanyi
Energy and Power
NEC Branch Circuit Requirements
The National Electrical Code (NEC 2011) provides guidance for electrical contractors and electricians, but it is really intended for use by governmental agencies that have legal jurisdiction over electrical installations… Read more
Jul 15, 2013 | By Edvard Csanyi
Solar Power
Calculation Example of Small Photovoltaic (PV) Residential Stand-Alone System
– Array Size: 10, 12-volt, 51-watt modules; Isc= 3.25 amps, Voc= 20.7 volts – Batteries: 800 amp-hours at 12 volts – Loads: 5 amps DC and 500-watt inverterwith 90% efficiency…. Read more
Jul 12, 2013 | By Edvard Csanyi
Electric Motor
What is the rewind scenario if a motor fails?
Unlike an initial motor purchase where your decision is limited to procuring a standard versus a premium efficiency motor, a motor failure or burnout produces three alternatives. Your options are… Read more
Jul 10, 2013 | By Edvard Csanyi
Electrical Lectures
Development of a Sine-Wave Output In AC Generator
The elementary AC generator (Figure 1) consists of a conductor, or loop of wire in a magnetic field that is produced by an electromagnet. The two ends of the loop are… Read more
Jul 08, 2013 | By Edvard Csanyi
Electric Motor
Keeping Motor At Correct Temperature When Connected To a Frequency Converter
When a motor is connected to a frequency converter it must be kept at the correct temperature, and this is subject to two types of influence: If the speed decreases,… Read more
Jul 05, 2013 | By Edvard Csanyi
Energy and Power
A Few Words About Battery Hazards and Why They Happen
Because batteries store large amounts of energy, there are certain hazards that are associated with battery operation. These hazards must be fully understood to ensure safe operation of batteries. Cell… Read more
Jul 03, 2013 | By Edvard Csanyi
Transmission and Distribution
Voltage Distribution In a Suspension Insulator Strain
A suspension insulator strain consists of a series of alternately insulators and metal parts, which bind each insulator to the next. This constitutes a series of connected capacitors, with each… Read more
Jul 01, 2013 | By Emmanouil Angeladas
Energy and Power
Surge protective categories defined by ANSI/IEEE C62.41
Three different surge protective classes or zones have been defined by ANSI/IEEE C62.41, Recommended Practice on Surge Voltages in Low Voltage Power Circuits. These classes are illustrated in the pictorial diagram… Read more
Jun 28, 2013 | By Edvard Csanyi
Energy and Power
Thinking About Security Considerations in SCADA Systems (2)
Continued from previous part: Thinking About Security Considerations in SCADA Systems (1) In this part of technical article, I will focus on various types of threats which must be considered… Read more
Jun 26, 2013 | By Bipul Raman
Energy and Power
Thinking About Security Considerations in SCADA Systems (1)
SCADA System can be affected by a number of threats, which may be natural or intentional. So it is very much important to focus on security aspects of SCADA Systems. In… Read more
Jun 24, 2013 | By Bipul Raman
Electric Motor
Mysterious synchronous operation of generator solved
To many people, the operation of a synchronous generator is very mysterious and strange. Here is this huge machine which runs are a constant speed whether the 4 – 24 inch steam… Read more
Jun 21, 2013 | By Edvard Csanyi
Industrial Automation
An Introduction To SCADA For Electrical Engineers – Beginners
It is impossible to keep control and supervision on all industrial activities manually. Some automated tool is required which can control, supervise, collect data, analyses data and generate reports. A… Read more
Jun 19, 2013 | By Bipul Raman
