Low Voltage
Inspection, Test and Measurement Procedures for LV and MV (up to 36kV) Switchgear
Installed in clean, well ventilated or air-conditioned locations, switchgear will require little routine maintenance. Major inspection should be scheduled for power plant shutdowns and concentrate for low voltage switchboards on identifying contact wear, correct operation of interlocks, correct overload settings and fuse… Read more
Jan 16, 2015 | By Edvard Csanyi
Electric Motor
The most common LV/MV motor starting devices
The most common motor starting device is the low voltage motor-starting contactor. A contactor is defined as “a two-state ON-OFF device for repeatedly establishing and interrupting an electric power circuit.” Contactors are designed for optimum performance and lifetime when switching loads; they… Read more
Jan 14, 2015 | By Edvard Csanyi
Energy and Power
The consumer power substation with metering on medium voltage side
A consumer power substation with metering on medium voltage side is an electrical installation connected to a utility supply system at a nominal voltage usually between 1kV – 35kV, which for example may supply a single MV/LV transformer (exceeding generally 1250… Read more
Jan 12, 2015 | By Edvard Csanyi
Transformers
Why cooling is essential for long transformer life?
As you already know, cooling is really essential for long transformer life. Most transformers are designed for 55°C or 65°C rise. Using newer insulations such as Nomex, temperatures of 95°C and higher can be achieved. These temperatures can only be… Read more
Jan 09, 2015 | By Edvard Csanyi
Electric Motor
4 Types of DC Motors and Their Characteristics
As you already know, there are two electrical elements of a DC motor, the field windings and the armature.The armature windings are made up of current carrying conductors that terminate at a commutator. DC voltage is applied to the armature… Read more
Jan 07, 2015 | By Edvard Csanyi
High Voltage
8 Major Advantages of Distribution Automation
More and more electric utilities are looking to distribution automation as an answer to the three main economic challenges facing the industry: The rising cost of adding generating capacity, Increased saturation of existing distribution networks and Greater sensitivity to customer… Read more
Jan 05, 2015 | By Edvard Csanyi
Cables
Test On 110kV Power Cable After Installation (3)
In previous two parts of this technical article first six procedures were explained. Now the last three (7, 8 and 9) will be explained in details: Phase indication test (part 1) DC conductor resistance measurement (part 1) Capacitance test (par 1)… Read more
Jan 02, 2015 | By Zafar Iqbal
Electric Motor
When to Buy Premium Efficiency Motors?
Using premium efficiency motors can reduce your operating costs in several ways. Not only does saving energy reduce your monthly electrical bill, it can postpone or eliminate the need to expand the electrical supply system capacity within your facility. On a larger scale, installing efficiency… Read more
Dec 31, 2014 | By Edvard Csanyi
Energy and Power
Hey engineers, wish you all the best in 2015!
Well, it’s been a long year with a lot of published technical articles and gained knowledge in the field of electrical engineering. EEP’s team payed special attention to the technical articles related to power substations and industry automation from the… Read more
Dec 29, 2014 | By Edvard Csanyi
Cables
Test On 110kV Power Cable After Installation (2)
In previous part of this technical article first three procedures were explained. Now the rest will be explained in details: Phase indication test (previous part) DC conductor resistance measurement (previous part) Capacitance test (previous part) DC Sheath test on outher sheath… Read more
Dec 26, 2014 | By Zafar Iqbal
Energy and Power
Factors affecting transient stability – Faults analysis
A power system may be said to have transient stability if the various generating stations will regain equilibrium following a periodic system disturbances. System disturbances which cause the greatest trouble are those due to line faults. A line fault, in addition to the… Read more
Dec 24, 2014 | By Edvard Csanyi
Cables
Test On 110kV Power Cable After Installation (1)
Site test procedure covers all necessary electrical testing for the 110 kV cable and accessories to be carried out during and after installation of the cable system. This procedure is in line with the requirements of the contract suitable for… Read more
Dec 22, 2014 | By Zafar Iqbal
Protection
Lightning and surge protection of multi-megawatt wind turbines
There is an unabated trend for the utilisation of regenerative energy gained from wind turbines, solar, photovoltaic and biogas plants or geothermal heat. This is an enormous market potential not only for the energy industry but also for the suppliers and the electrical… Read more
Dec 19, 2014 | By Edvard Csanyi
Electric Motor
8 NEC Basic Feeder Circuit Sizing Requirements
Once the branch circuit loads are calculated, the feeder circuit loads may be calculated by applying demand factors to the branch circuit loads. General Lighting Loads (Article 220.42) Show window or track lighting (Article 220.43) Receptacles in other than dwelling… Read more
Dec 17, 2014 | By Edvard Csanyi
Testing and Commissioning
Transformer routine test – Partial discharge measurement
This routine test aims to measure the partial discharges which may occur in the transformer insulation structure during test. Partial-discharges are electrical arks which form the surges between electrodes of any area of the insulating media of a transformer between… Read more
Dec 15, 2014 | By Edvard Csanyi
