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34 Questions And Answers To Break the Myth About SF6 Gas In Electrical Equipment
34 Questions And Answers To Break the Myth About SF6 Gas In Electrical EquipmentMiracle gas or not?There are many published discussions and reports on various aspects of SF6 gas (sulphur hexafluoride)...
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The Consumer Power Substation With Metering On Medium Voltage Side
The Consumer Power Substation With Metering On Medium Voltage Side (photo credit: alanya.tv)Nominal voltage 1kV – 35kVA consumer power substation with metering on medium voltage side is an electrical...
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Inspection, Test and Measurement Procedures for LV and MV (up to 36kV)...
Inspection, Test and Measurement Procedures for LV and MV (up to 36kV) Switchgears (on photo” Eaton Cutler Hammer Magnum DS Switchgear Inspection, and Transformer Testing)Importance of checks and...
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Ring Main Unit (RMU) as an important part of secondary distribution substations
Ring Main Unit as an important part of Secondary Distribution Substations (on photo: ABB’a 24kV RMU type ‘SafeRing’)RMUA Ring Main Unit (RMU) is a totally sealed, gas-insulated compact switchgear unit....
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Degradation of Insulation in Switchgear (What’s Really Happening)
Degradation of Insulation in Switchgear (why you should take it seriously); photo credit: Schneider ElectricPartial Discharge (PD)Electrical insulation is subjected to electrical and mechanical stress,...
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Current and voltage sensors as an alternative to traditional CTs and VTs
Current and voltage sensors as an alternative to traditional CTs and VTs (on photo: The current snsors type KECA 80 Cxxx are intended for use in current measurement in medium voltage air insulated...
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Medium Voltage Earthing Systems – Arrangements and Comparison
Neutral point connection methodFirst, let’s define the different medium voltage earthing systems and then compare the advantages and disadvantages of each one. Earthing systems in medium voltage can be...
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MV Metal-Enclosed Switchgear and Loss of Service Continuity (LSC) Categories
Accessibility and service continuitySome parts of a switchgear may be made accessible for the user, for various reasons from operation to maintenance, and such an access could impair the overall...
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SF6 or Vacuum MV Circuit Breaker In Specific Switching Applications
Matching the MV circuit breaker to the task Many years of experience in developing both SF6 and vacuum medium-voltage circuit breakers has yielded up ample evidence that neither of the two technologies...
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4 Factors To Consider When Selecting a Sectionalizer
Distribution system protection // Sectionalizers are (beside overcurrent relays, reclosers and fuses) one of the most used for distribution system protection. A sectionalizer is a device that...
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Analysis of pole-mounted MV/LV transformer grounding
MV/LV transformer grounding philosophy // Let’s discuss in some detail the reasons for the grounding philosophy adopted for pole-mounted MV/LV transformer substations illustrated in Figure 0. LV...
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8 Schemes To Supply MV Switchboard
MV switchboard supply solutions // Medium voltage networks are made up of switchboards and the connections feeding them. Let’s take a look at the eight different supply modes of these medium voltage...
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Power plants on board of big ships (1)
Electrical system on board // Without going into the details of the management modalities of the electric distribution or of the layout that an electrical system on board may have, it is possible to...
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Power plants on board of big ships – Primary distribution schemes
Continued from the first part Power plants on board of big ships – LV/MV ditribution MV primary distribution network The MV primary distribution network generally consists in a three-phase system with...
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Basics Of Primary Medium Voltage Switchgear
Primary medium voltage switchgear Primary medium voltage switchgear represents an important part within the primary distribution substation functionality. The switchgear works as a connection node...
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Distribution of the MV neutral conductor right to the loads
MV distributed neutral conductor 4-wire systems are characterized by distribution of the MV neutral conductor right to the loads. This type of distribution is used in the USA and in certain countries...
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Electrical Distribution Architecture In Water Treatment Plants
Water treatment plants For both drinking water and wastewater treatment, 4 different sizes of plants have been distinguished. The size of plants can be expressed in quantity of treated water per day,...
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3 Common Misconceptions Regarding Automatic Transfer Systems
Automatic transfer systems Several common misconceptions regarding automatic transfer systems exist. Three of these are addressed here // I need a complex automatic transfer scheme at every voltage...
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What would be the best solution for urban supply networks – AIS or GIS system?
Saving in investment and operating costs This technical analysis was carried out by ABB to show that for urban supply networks. Read more
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Where Do We Use Arc Suppression Coil (Petersen Coil)?
Compensation with Arc Suppression Coil The arc suppression coil (ASC), also known as Petersen coil, is used to compensate the. Read more
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