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Monthly Archive for: «May, 2012»

Industrial Automation

Using MODBUS for Process Control and Automation (2)

To communicate with a slave device, the master sends a message containing: Device Address Function Code Data Error Check Continued from first part of article Using MODBUS for Process Control… Read more

May 31, 2012 | By Edvard Csanyi

The Schneider Electric Modicon Quantum is a versatile PLC
Smart Grid

Electric Vehicles and the Smart Grid

Another source of urgency for the smart grid is meeting goals for getting more “clean” cars and vehicles on the road. Electric vehicles largely eliminate greenhouse gas emissions from vehicle… Read more

May 30, 2012 | By Edvard Csanyi

Toyota Prius
Energy Efficiency

Electric Power Quality and Lighting (part 2)

Continued from first part: Electric Power Quality and Lighting (part 1) Power factor is a measure of how effectively a device converts input current and voltage into useful electric power…. Read more

May 29, 2012 | By Sufi Shah Hamid Jalali

Electric Power Quality and Lighting
Energy Efficiency

Electric Power Quality and Lighting (part 1)

Concerns about the effects of lighting products on power distribution systems have focused attention on power quality. Poor power quality can waste energy and the capacity of an electrical system;… Read more

May 26, 2012 | By Sufi Shah Hamid Jalali

Electric Power Quality and Lighting
Energy and Power

Process Design Basics for Station Facility

The purpose of this article is to establish the design basis electrical system Front End Engineering Design (FEED) and data design or standards uses in the gathering stations facility will… Read more

May 25, 2012 | By ivan.kurniawan

Process flow diagram
Power Substation

Transformer Connection Star-Star

The windings of three phase transformers may be connected in by Y or Δ in the same manner as for three single phase transformer. Since the secondary’s may be connected either… Read more

May 23, 2012 | By jiguparmar

Dry type cast resin transformer
Energy and Power

Special considerations when selecting transformer protection

Current transformer ratio selection and performance require special attention when applying transformer protection. Unique factors associated with transformers, including its winding ratios, magnetizing inrush current, and the presence of winding… Read more

May 19, 2012 | By Edvard Csanyi

Dry-type power transformers 11/0.42kV 2000kVA
Electrical Lectures

Power Measurement In AC Circuits

Power measurement in AC circuits can be quite a bit more complex than with DC circuits for the simple reason that phase shift complicates the matter beyond multiplying voltage by current… Read more

May 15, 2012 | By Edvard Csanyi

GE Watthour Meter
Energy and Power

Introduction to instrument transformers

Instrument transformers (ITs) are designed to transform voltage of current from the high values in the transmission and distribution systems to the low values that can be utilized by low… Read more

May 14, 2012 | By Edvard Csanyi

Instrument transformers - ABB

An Overview Of Clamp Meter

Clamp-on ammeter or simply ‘clamp meter’ is an instrument that is used to measure the current flowing through a conductor. An AC Clamp meter basically consists of a current transformer… Read more

May 06, 2012 | By S

Clapm meter

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