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Simplify Downstream Installation with Cascading
Simplify Downstream Installation with Cascading (on photo Prisma P 0,42kV switchboard with Masterpact 2500A circuit breakers and Canalis busbar systems for distribution)Few Words About Cascading...
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Smart and Safe Protective Shutdown with Selectivity
Smart and safe protective shutdown with selectivity (on photo ABB's MNS Low Voltage Switchgear)Safety pointFrom the point of view of the operational safety and reliability of an entire low-voltage...
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Application of Circuit Breakers in IT Networks
Application of Circuit Breakers in IT Networks (on photo LV switchboard by MaTech Magyar Technologiai Kft.)IntroductionIT supplies are used to prevent that a ground fault leads to immediate...
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Methods of Controlling Lightning Overvoltages in HV
Hubbell's improved protecta-lite transmission line arrester line has been simplified with fewer parts and less risk of parts wearing out. Several steel plated components were replaced with one copper...
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Using Protective Relay For Fighting Against Faults
Using Protective Relay For Fighting Against FaultsContent Introduction to Protective RelayWorking Principle of Protective SchemeWhat is Relay?Functions of Protective RelayDesirable qualities of...
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Short-Circuit Switching Capacity Definition
Short-circuit Switching Capacity Definition (photo by M. Diskovic)What is the switching capacity?The switching capacity is the r.m.s value of a current at a given power factor cosφ as well as a given...
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Generalities and Discrimination Between RCDs
Generalities and Discrimination Between Residual Current Devices (RCDs)Generalities on Residual Current Circuit-BreakersThe operating principle of the residual current release is basically the...
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High Voltage Substations Overview (part 1)
Substations and Distribution Substations Overview (Photo by Ipco Group)Introduction High voltage substations are interconnection points within the power transmission and distribution systems between...
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Things You Should Know About Medium Voltage GIS
Things You Should Know About Medium Voltage GISContent Environmental ConcernsSafety ConcernsSpecial Handling ProceduresInstallation ConcernsOperation and Maintenance ConcernsEnd of Life / Recycling...
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Defining Size and Location of Capacitor in Electrical System (2)
Defining Size and Location of Capacitor in Electrical System (2) Continued from part 1: Defining Size and Location of Capacitor in Electrical System (2) Content Size of circuit breaker (CB), fuse and...
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Commissioning of HV Panel – Operational and Functional Checkup
Commissioning of HV Panel - Operational and Functional Checkup (on photo Macmillan – New High Voltage Panel by Skilz Building Solutions)Main ObjectiveThe main objective of the test is to check the...
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Talking About HV Shunt Reactor Switching (part 1)
Talking About HV Shunt Reactor Switching (photo by Zaporozhtransformator Joint Stock Company - ZTR)ContentScopeShunt reactors applicationClosing operationOpening operation (in next part)Conclusions (in...
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Talking About HV Shunt Reactor Switching (part 2)
Power transformer shunt reactor (on photo shunt reactor of Hyosung Power & Industrial Systems via DirectIndustry.com) Continued from first part: Talking About HV Shunt Reactor Switching (part 1)...
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What’s Really Important When You’re Designing The Low Voltage Switchgear?
What's Really Important When You're Designing The Low Voltage Switchgear?Requirements on the SwitchgearHere what’s important when you’re designing the low voltage switchgear:Device Application in the...
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Purposes and Examples of Safety Interlocking Devices
Purposes and Examples of Safety Interlocking Devices (on photo: GENIMOD – GREINER switchgear suitable for all areas relating to the generation, distribution and application of electrical energy in a...
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Location of Current Transformers in HV Substation
Siemens High Voltage Instrument TransformersPower flowCurrent transformers are used for protection, instrumentation, metering and control. It is only the first function that has any bearing on the...
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An Example of Choosing 138 kV Line Circuit Breaker
An Example of Choosing 138 kV Line Circuit Breaker (photo credit: wilsonconst.com)Let’s choose 138 kV line #3 circuit breakerTo better understand a process of high voltage equipment selection, let’s...
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5 Most Common Critical Power Distribution Topologies
5 Most Common Critical Power Distribution Topologies (photo credit: crown-electric.com)Today’s mission-critical applicationsIn many of today’s mission-critical applications, ever-increasing reliability...
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Rating Definitions Applied to Medium Voltage Circuit Breaker
Rating Definitions Applied to Medium Voltage Circuit Breaker (on photo: SQUARE D medium voltage circuit breaker 15kV 1200A)MV protection applicationsThe medium voltage circuit breaker is the device of...
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Rating Definitions Applied to Low Voltage Molded-Case Circuit Breaker (MCCB)
Rating Definitions Applied to Low Voltage Molded-Case Circuit Breaker (MCCB)For system protection 600V and belowThe molded-case circuit breaker is the “workhorse” for system protection 600V and below....
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