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Archive: Category «High Voltage»

High Voltage

Conductor Types Used For Overhead Lines

The international standards covering most conductor types for overhead lines are IEC 61089 (which supersedes IEC 207, 208, 209 and 210) and EN 50182 and 50183 (see Table 1). For… Read more

Apr 20, 2013 | By Edvard

Conductor Types Used For Overhead Lines
High Voltage

Using High-Speed Grounding Switches

Automatic high-speed grounding switches are applied for protection of power transformers when the cost of supplying other protective equipment is deemed unjustifiable and the amount of system disturbance that the… Read more

Feb 15, 2013 | By Edvard

Using High-Speed Grounding Switches
High Voltage

High Voltage Substations Overview (part 2)

Continued from first part: High Voltage Substations Overview (part 1) Transformers are used for the transformation of high and medium voltage to low voltage, flanked by specific protective devices and… Read more

Jan 26, 2013 | By Emmanouil Angeladas

High Voltage Substations Overview (part 2)
High Voltage

High voltage substations overview (part 1)

High voltage substations are interconnection points within the power transmission and distribution systems between regions and countries. Different applications of substations lead to HV substations with and without power transformers: Step… Read more

Jan 25, 2013 | By Emmanouil Angeladas

Substations and Distribution Substations Overview
High Voltage

Purpose of Disconnect Switches In HV Substation

Switches may be of several types, the common characteristic is that none are designed to interrupt fault currents and the insulation or insulators associated with them must coordinate with the… Read more

Jan 14, 2013 | By Edvard

Purpose of Disconnect Switches In HV Substation (on photo: Siemens Goab switch)
High Voltage

Environmental Stresses On External Insulation

The external insulation (transmission line or substation) is exposed to electrical, mechanical, and environmental stresses. The applied voltage of an operating power system produces electrical stresses. The weather and the… Read more

Jan 07, 2013 | By Edvard

Environmental Stresses On External Insulation
High Voltage

Enhance Grid Reliability With Hybrid HVDC Breaker

Introduction to HHVDC How does Hybrid HVDC Breaker work? (VIDEO) Hybrid HVDC Breaker Construction Proactive control Prototype Design Of The Hybrid HVDC Breaker Comparison/Summary The advance of voltage source converter-based… Read more

Dec 15, 2012 | By Edvard

The Hybrid HVDC Breaker by ABB
High Voltage

Methods of Controlling Lightning Overvoltages in HV

For well shielded transmission lines, the backflashover condition, close to the substation, is of prime concern for determining the location and number of surge arresters required to achieve insulation coordination… Read more

Dec 08, 2012 | By Edvard

Methods of Controlling Lightning Overvoltages in HV
High Voltage

HV Instrument Current Transformers in T&D

Electrical measurements on a high-voltage transmission and distribution systems cannot be made practically or safely with direct contact to the power carrying conductors. Instead, the voltages and currents must be… Read more

Nov 23, 2012 | By Edvard

HV Instrument Current Transformers in Transmission and Distribution Systems
High Voltage

The Purpose of High Voltage Circuit Switchers

Circuit switchers have been developed to overcome some of the limitations of fusing for substation power transformers. Circuit switchers have SF6 gas interrupters and are designed to provide three-phase interruption… Read more

Nov 16, 2012 | By Edvard

Vertical interrupter circuit switcher without integral disconnect switch
High Voltage

Electrical Safety Standards for LV/MV/HV (Part-3)

Continued from part 2 – Electrical Safety Standards for LV/MV/HV (Part-2) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Code: Indian Electricity Rules / Central Electricity Authority Right of Way Clearance… Read more

Nov 14, 2012 | By jiguparmar

Electrical Safety Standards for LV/MV/HV part 3
High Voltage

Electrical Safety Standards for LV/MV/HV (Part-2)

Continued from part 1 – Electrical Safety Standards for LV/MV/HV (Part-1) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Clearances of Electrical Line to Ground and Roads Clearances of Electrical Line… Read more

Nov 12, 2012 | By jiguparmar

Electrical Safety Standards for LV/MV/HV part 2
High Voltage

Electrical Safety Standards for LV/MV/HV (Part-1)

Standard: Western Power Company Water Safely Clearance on Electrical Fires Minimum Approach Distance for Authorized Person Minimum Approach Distance for Ordinary Person Minimum Approach Distance for Vehicle and Plant for… Read more

Nov 07, 2012 | By jiguparmar

Electrical Safety Standards for LV/MV/HV (Part-1)


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