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Erection Procedures For Medium Voltage Switchgear
ABB's Unigear medium voltage switchgear Before commencing erection of medium voltage (MV) switchgear check that all connections are tight on busbars and on main and auxiliary circuits. Examine the...
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Inspection and Test Procedures for LV Cables
Inspection and Test Procedures for LV CablesContentVisual and Mechanical InspectionElectrical TestsTest ValuesTABLE 100.12 – US Standard Fasteners – Bolt-Torque Values for Electrical...
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Inspection and Test Procedures for Metal-Enclosed Busways
Inspection and Test Procedures for Metal-Enclosed BuswaysContentVisual and Mechanical InspectionElectrical TestsTest ValuesTest Values – Visual and MechanicalTest Values – ElectricalTables:TABLE...
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Transformer Routine Test – Measurement of Winding Resistance
BEST Transformers - OSB Power Transformers Test LaboratoryCalculating Load Loss ValuesMeasurement is made to check transformer windings and terminal connections and also both to use as reference for...
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Testing and Commissioning of Substation DC System
Testing and Commissioning of Substation DC System (on photo: The battery assembly rated at 108V 200AH, 55 Tungstone Plante Cells all fitted with Aquagen catalytic recombination fillers, which...
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Testing and Commissioning of MV/HV Cables
Example of asbestos paper insulation wrap on high-voltage cable inside an underground cable vault. Several layers of the soft and friable insulation are wrapped around the cable in long, wide strips....
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Transformer Routine Test – Measurement Of No-Load Loss And Current
Transformer Routine Test - Measurement Of No-Load Loss And Current (on photo: Power transformer - BEST)Introduction to testThe no-load losses are very much related to the operational performance of a...
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Transformer Routine Test – Measurement of Voltage Ratio and Check of Phase...
Transformer Routine Test – Measurement of Voltage Ratio and Check of Phase Displacement (on photo: OSB laboratory of BEST Transformers)IntroductionThe no-load voltage ratio between two windings of a...
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Defining Size and Location of Capacitor in Electrical System (1)
Defining Size and Location of Capacitor in Electrical System (1)Content Type of Capacitor Bank as per Its Application:Fixed type capacitor banksAutomatic type capacitor banksTypes of APFC – Automatic...
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Erection procedure for HV switchgear (Part 1)
Erection procedure for HV switchgear (on photo: 150KV GI Electrical Substation extension in Greece, Atherinolakos Crete by PARALOS Engineering S.A.)Important points 66kV/230kV GIS extension work...
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Erection procedure for HV switchgear (Part 2)
ABB Gas-insulated Switchgear ELK-04 Modular System up to 170 kV, 4000 A, 63 kA Continued from first part: Erection procedure for HV switchgear (Part 1) Positioning of cubicles Positioning of the...
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When a transformer has stomach pain and wants to…
Transformer windings forces due to the magnetic forces (photo by ALSTOM)About stomach painDuring normal operation, transformer internal structures and windings are subjected to mechanical forces due...
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Erection Procedure for Power Transformer
Erection of power transformer (by Entel Energoprojekt in Abu Dhabi Distribution Company, 33KV & 11KV Network for Ghuzlan Island) This technical article deals with transformers and their...
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Transformer Routine Dielectric (Insulation) Test
Transformer Routine Dielectric (Insulation) Test (on photo: OSB laboratory of BEST Transformers)Insulation tests to be performedThe following insulation tests are performed in order to meet the...
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Condition Monitoring of Transformers
Condition Monitoring of Transformers (on photo: distributive tranformer; by Gazoogleheimer via Flickr )Detecting early signs of deteriorationIt is possible to provide transformers with measuring...
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High voltage testing – Direct current (DC)
High voltage testing - Direct current (DC) - Photo by www.powertechlabs.comDC TestsDC tests are used mainly to do “pressure tests” on high voltage cables. Although the cables operate with AC, AC...
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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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Identifying The Primary And Secondary Phasor Polarities Of Transformer –...
CPC 100 - Universal testing device for electrical diagnostics on transformers, current transformers, voltage transformers, grounding systems, lines and cables, and circuit breakers (photo by...
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Testing and Commissioning Procedure For Motors
Testing and Commissioning Procedure For Motors // Photo by TECO Middle East (TME)Scope Of Motor TestingIt should be noted that the scope of motor testing depends upon the motor type and size, this...
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8 Important Checks To Do Before Powering Up The Dry-Type Transformer
8 Important Checks To Do Before Powering Up The Dry-Type Transformer (on photo: TRIHAL transformer by Schneider Electric)8 Obligatory ChecksThe transformer should be powered up only after checking the...
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