Energy Efficiency
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 input. Centrifugal water systems were the focus of cholorfluorocarbon (CFC)… Read more
May 30, 2016 | By Edvard Csanyi
Power Substation
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 laid down by EPRI AC transmission Line Reference Book –… Read more
May 27, 2016 | By Asif Eqbal
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 erection and installation point of view layout of any substation… Read more
May 25, 2016 | By Asif Eqbal
High Voltage
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 HV cable has important advantages over systems with air insulated… Read more
May 23, 2016 | By Edvard Csanyi
Cables
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 control equipment, in EHV substations has resulted in many equipment… Read more
May 20, 2016 | By Edvard Csanyi
Testing and Commissioning
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 deterioration. The test measurement values are affected by variables such… Read more
May 18, 2016 | By Edvard Csanyi
Metering
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 already guess from the title itself, all testings described below… Read more
May 16, 2016 | By Edvard Csanyi
Maintenance
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 be maintained and serviced regularly to ensure that they will… Read more
May 13, 2016 | By Edvard Csanyi
Energy and Power
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 during their life for signs of leakage or physical deformation…. Read more
May 11, 2016 | By Edvard Csanyi
Electric Motor
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 the supply to the motor after the motor has run… Read more
May 09, 2016 | By Edvard Csanyi
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 only type of automotive generator used in industry, with total powers… Read more
May 06, 2016 | By Edvard Csanyi
Power Substation
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 as an irritating “hum” and can hear even against a… Read more
May 04, 2016 | By Edvard Csanyi
Energy and Power
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 compared by current transformers (CTs). If the net between all… Read more
May 02, 2016 | By Edvard Csanyi
