How to shrink three-phase AC high voltage substation and optimize cost and space
Nowadays, when every cent is essential when building a substation, it is imperative to optimize each HV equipment without compromising functionality. This technical article deals with a few solutions to… Read more
Jul 06, 2020 | Edvard
The impact of interconnection transformer on the protection of the utility system with DG
Interconnection transformers are used to interface a distribution generation (DG) unit with an existing power system, and to provide the necessary isolation. Utilities recommend using an interconnection transformer to eliminate… Read more
Jun 03, 2020 | Edvard
Transformer connections you are not allowed to forget
Transformers used in a power substations or a power system could be a bank of three single phase transformers connected in either star/delta or star/star etc., or could be a… Read more
May 20, 2020 | Edvard
Practical tips for the protection of generators and power transformers
There are usually several ways of protecting HV/MV generators and transformers. It should be noted that one protection relay is often used for several functions, for example, an overcurrent relay…...
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Best relay protection practices applied to shunt reactors, capacitors, SVCs and STATCOMs
This technical article explains the protection practices applied to shunt reactors and capacitors as well as to static var compensators (SVCs) and static compensators (STATCOMs). Dry-type and oil-immersed reactors usually… Read more
Mar 11, 2020 | Edvard
An overview of transformer connections and diagrams in the electric power system
Power transformers are used extensively by traditional electric utility companies, power plants, and industrial plants. This technical article summarizes the basic types, connections, and diagrams of transformers needed for analyzing…...
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This page requires a Premium Membership. Get access to premium HV/MV/LV technical articles, electrical engineering guides, and papers. Check out the benefits of each plan and choose the one that works best for you or your organization. You can purchase a plan for 1 or 3 months and a year.Log InRegisterMar 05, 2020 | Edvard
The art of transformer maintenance, inspection and repair (recommended practices)
The primary purpose of transformer maintenance is to ensure the internal and external parts of the transformer and accessories are kept in good condition and “fit for purpose” and able… Read more
Feb 10, 2020 | Edvard
Eight criteria you should consider when choosing the right MV/LV transformer type
Although there are few common-sense rules that every electrical engineer follow when choosing the transformer type, it’s always a good idea to name the most important of them. This technical… Read more
Jan 29, 2020 | Edvard
IEC and NEMA/IEEE ratings of current transformers (CTs) in medium voltage applications
First, let’s remind ourselves of the basics in a few sentences. That is something you must know. A current transformer (CT) is designed to produce a secondary current which is… Read more
Jan 20, 2020 | Edvard
Notes in preparation of an MV/LV substation civil drawings and construction layout
MV/LV substations are not only a point of supply but also provide a means of network isolation in the event of faults or emergencies. In that manner, a detailed substation…...
PREMIUM Membership Required
This page requires a Premium Membership. Get access to premium HV/MV/LV technical articles, electrical engineering guides, and papers. Check out the benefits of each plan and choose the one that works best for you or your organization. You can purchase a plan for 1 or 3 months and a year.Log InRegisterDec 05, 2019 | Edvard
Four special connections of current transformers in relay protection applications
As you should already know, current transformers are used for metering and relay protection purposes. When we are talking about current transformers used for metering, their performance is of interest… Read more
Dec 02, 2019 | Edvard
4 electrical quantities you MUST fully understand to select the right cast-resin transformer
This the basic question, but it’s important to start from the scratch. Well, distribution transformers link the MV to the LV system and step down the electrical power to be… Read more
Nov 13, 2019 | Edvard
12 on-site checks to inspect the transformer’s health
On-site inspection of the substation transformer usually exposes important condition changes and it initiates various suspicions that need to be investigated in detail. As with any other substation equipment, many… Read more
Nov 11, 2019 | Edvard
Pre-commissioning checks and tests of high voltage current transformers (CTs)
Once erection is completed, various pre-commissioning checks and tests are performed to ensure the healthiness of the switchyard equipment prior to their energization. This technical article explains various major electrical… Read more
Oct 02, 2019 | Edvard
Testing and commissioning of HV power transformers, circuit breakers, CTs and VTs
As you already know, substations are the points for controlling the supply of power on different routes by means of various equipment such as power transformers, circuit breakers, CTs/VTs, compensating… Read more
Sep 11, 2019 | Edvard
