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
Energy and Power
Danger And Control Of Static Electricity Buildup
It is necessary to study the static buildup potential of any workplace and institute protective measures to control such buildup. The following are the dangers posed by static electricity: Ignition causing fire or explosion Damage to sensitive electronic components Electric… Read more
Dec 12, 2014 | By Edvard Csanyi
Electric Motor
PLC Implementation Of Forward/Reverse Motor Circuit With Interlocking
Figure 1 illustrates a hardwired forward/reverse motor circuit with electrical and push button interlockings. Figure 2 shows the simplified wiring diagram for this motor. The PLC implementation of this circuit should include the use of the overload contacts to monitor… Read more
Dec 10, 2014 | By Edvard Csanyi
Electric Motor
Characteristics And Work Principles of Switched Reluctance (SR) Motor
The Switched Reluctance (SR) motor is very different from the other polyphase machines described because both the stator and the rotor have salient poles. The motor can only be used in conjunction with its specific power converter and control, and… Read more
Dec 08, 2014 | By Edvard Csanyi
Energy and Power
Clean vs dirty ground – Bonding of isolated, common & integrated grounding systems
In this article we covered in detail the physics related to lightning phenomenon and how the surges due to lightning strokes are safely conducted to ground using a lightning protection system consisting of air terminations, down conductors and grounding electrodes…. Read more
Dec 05, 2014 | By Edvard Csanyi
Energy and Power
Providing capacitive reactive compensation with shunt capacitor banks
Shunt capacitor banks are mainly installed to provide capacitive reactive compensation – power factor correction. The use of SCBs has increased because they are relatively inexpensive, easy and quick to install and can be deployed virtually anywhere in the network…. Read more
Dec 03, 2014 | By Edvard Csanyi
Energy and Power
Electrical life (durability) of LV circuit breakers due to the switching operations
According to the standard IEC 947-2, there is actually no defined stipulation regarding the requirements of electrical life of a circuit breaker. The numbers of switching operations which a circuit breaker under no-load, normal load, overload and short-circuit conditions has… Read more
Dec 01, 2014 | By Edvard Csanyi
Energy and Power
The most typical indices for measuring power quality disturbances
There are various methods for categorizing the severity of power disturbances. The most typical indices for measuring power quality disturbances are listed and explained below: Distortion factor Crest factor Notch area Recovery time Displacement power factor Total power factor K… Read more
Nov 28, 2014 | By Edvard Csanyi
