Power distribution configurations with three 3-phase hot power lines

Power leaves the substation on three, three-phase “hot” power lines that are strung adjacent to highways or along local roads to points of use. All three phases share a single… Read more

Jun 01, 2016 | Electrical Lectures

Equipment Used To Implement Automatic Transfer System (ATS)

Although the basic operational requirements of any automatic transfer system are as given in this technical article, the equipment which is used to implement the automatic transfer system can vary…. Read more

Jun 01, 2016 | Energy and Power

Tips For Successful Energy Efficiency Of Centrifugal Water Chillers

Centrifugal water chillers comprise a significant portion of industrial and large commercial electrical load. These machines are efficient, typically producing a cooling effect two-to-three times greater than the required energy… Read more

May 30, 2016 | Energy Efficiency

Influence Of Electric Field and Clearances In EHV AIS Substation

Bus height is also governed and calculated by the fact that allowable electric field due to live conductor at man height should be less than permissible value as per guidelines… Read more

May 27, 2016 | Power Substation

Clearance Requirements In EHV AIS Substation You MUST Respect

Starting point for planning a substation is its single line diagram (SLD) which relates to circuit configuration, number of bus bars and its type and other associated equipment. However from… Read more

May 25, 2016 | Power Substation

What would be the best solution for urban supply networks – AIS or GIS system?

This technical analysis was carried out by ABB to show that for urban supply networks the combination of HV gas insulated switchgear – GIS (due to their compactness and flexibility) and… Read more

May 23, 2016 | High Voltage

Shielding and Grounding Practices for Control Cables in EHV Substations

For several years, the increased application of solid-state devices for protective relaying and control and for electronic equipment, such as audio tones, carrier and microwave equipment, event recorders, and supervisory… Read more

May 20, 2016 | Cables

Do’s and don’ts when measuring insulation resistance of a transformer

This test is performed at or above rated voltage to determine if there are low resistance paths to ground or between winding to winding as a result of winding insulation… Read more

May 18, 2016 | Testing and Commissioning

Using digital multimeter for testing the charging system of your car

To be honest with you, this article is about testing the car charging system and it isn’t applicable on new Tesla Model III or new BMW 7-series. As you can… Read more

May 16, 2016 | Metering

Why Good Care Of Overcurrent Protective Devices Really Matter

Whether in the design or maintenance of an electrical system, hazards exist if the proper overcurrent protective devices are not selected and applied. Circuit breakers and other electrical equipment also must… Read more

May 13, 2016 | Maintenance

General Requirements For Operation and Maintenance Of Battery Cells

Primary battery cells cannot be recharged and once their energy is depleted they should be disposed off in the manner recommended by the manufacturer. The cells should be examined occasionally… Read more

May 11, 2016 | Energy and Power

A few tips on how to select contactors for use in direct on line starters

Contactors for use in direct on line starters (DOL) are normally selected by their AC3 rating, that is the switching on of a cage type induction motor and switching off… Read more

May 09, 2016 | Electric Motor

Every car has it – The Lundell generator with claw-pole rotor

Increasing comfort and safety in cars, trucks, and buses driven by combustion engines require more installed electric power on board. As of now, the Lundell generator (claw-pole rotor generator) is the… Read more

May 06, 2016 | Electric Motor

Does transformer hum make you nervous? It does me.

Noise is caused by magnetostricition (changes in shape) of the core laminations while the transformer is energized. Transformers emit a low-frequency, tonal noise that people living in their vicinity experience… Read more

May 04, 2016 | Power Substation

Differential protection – Proven technique for more than 50 years

The best protection technique now and for more than 50 years is that known as differential protection. Here the electrical quantities entering and leaving the protected zone or area are… Read more

May 02, 2016 | Energy and Power