4 essential ground-fault protective schemes you should know about

While ground-fault protective schemes may be elaborately developed, depending on the ingenuity of the relaying engineer, nearly all schemes in common practice are based on one or more of the… Read more

Oct 29, 2018 | Edvard

4 Crucial Switching Functions Of a MV Circuit Breaker (Facts You MUST Know)

The demands made on MV power systems, irrespective of the place of use of the circuit breakers, vary widely in nature. All these functions cannot obviously be performed with the… Read more

Oct 17, 2018 | Edvard

Standard tripping schemes and trip circuit supervision schemes for MV switchgear

Medium voltage switchgears are used for switching medium voltage loads through associated control, measuring, protective and regulating equipment. This operation also involves considerable manual intervention which therefore necessitates the fulfilment… Read more

Oct 08, 2018 | Edvard

Coordination analysis for a typical 13 kV distribution feeder of several lines

A typical 13 kV feeder of several lines at a distribution substation is shown in Figure 1. This is supplied from a 115 kV line through a 15/20/25 MVA transformer… Read more

Oct 01, 2018 | Edvard

Selection of relay for incoming and outgoing feeders for MV and LV MCC switchgears

Selection of proper relay is one of the most important stages to have a reliable network. In this article, selection of relay for incoming and outgoing feeders for LV switchgears… Read more

Jul 02, 2018 | Edvard

Current and voltage transformers (CTs and VTs) as protection’s eyes and ears

The CTs (current transformers) and VTs (voltage transformers) are provided in the plants to reduce the voltage and current values of the plant to values such as to be able… Read more

Jun 20, 2018 | Edvard

MV/LV Power Substations Design and Schematics Notes (Network Supply and Enclosure Types)

Early consultation with the local Electricity Distributor is essential for agreement on a mutually approved MV/LV substation to act as the intake point for a particular site. This consultation is… Read more

Jun 11, 2018 | Edvard

Design of primary and secondary power distribution in car manufacturing plants (BMW, VW…)

When power supply systems for car manufacturing plant are planned, each individual problem can be faced in various ways: by means of technical solutions that feature specific technical advantages. This… Read more

May 30, 2018 | Edvard

The Most Important Tests For Medium Voltage Metal-Enclosed Switchgear (You SHOULD Perform)

The design of the insulation system for metal-enclosed switchgear is based upon life expectancy of about 30 years. However, environmental conditions such as dirt, moisture, and corrosive atmosphere can shorten… Read more

Mar 28, 2018 | Edvard

Design and Installation of Medium Voltage Switchgear (Facts You MUST Know)

When specifying and planning medium voltage switchgear for a substation, functions and influencing factors must be matched and an economically efficient solution must be found among the offerings of manufacturers…. Read more

Mar 26, 2018 | Edvard