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Archive: Category «Medium Voltage»

Maintenance

Maintenance Of Meduim Voltage Circuit Breakers

Medium-voltage circuit breakers rated between 1 and 72 kV may be assembled into metal-enclosed switchgear line ups for indoor use, or may be individual components installed outdoors in a substation…. Read more

Apr 17, 2011 | By Edvard

Maintenance Of Meduim Voltage Circuit Breakers
High Voltage

MiCOM P139 – Feeder Management and Bay Control

MiCOM P139 is a cost-effective one-box solution for integrated numerical time-overcurrent protection and control. The unit’s protection functions provide selective short-circuit protection, ground fault protection and overload protection in medium-… Read more

Mar 30, 2011 | By Edvard

MiCOM P139 Feeder Management and Bay Control
High Voltage

Economics of GIS

The equipment cost of GIS is naturally higher than that of AIS due to the grounded metal enclosure, the provision of an LCC, and the high degree of factory assembly…. Read more

Mar 04, 2011 | By Edvard

SF6 Gas Insulated Substations (GIS) - Mitsubishi Electric
High Voltage

SF6 gas as insulating and arc-quenching medium

Sulphur hexafluoride gas (SF6) is employed as insulation in all parts of the installation, and in the circuit-breaker also for arc-quenching. SF6 is an electronegative gas, its dielectric strength at… Read more

Jan 06, 2011 | By Edvard

Maintenance

Maintenance Of SF6 Gas Circuit Breakers

Sulfur Hexafluoride (SF6) is an excellent gaseous dielectric for high voltage power applications. It has been used extensively in high voltage circuit breakers and other switchgears employed by the power… Read more

Jan 04, 2011 | By Edvard

Maintenance Of SF6 Gas Circuit Breakers
High Voltage

Use Of Vacuum As A Breaking Medium

SF6 and vacuum are the two most modern breaking techniques in the fields of Medium Voltage (from 1 to 52 kV) and High Voltage (> 72.5 kV). They appeared in… Read more

Dec 22, 2010 | By Edvard

Fig-1 Evolution Of MV Circuit Breaker Markets In Europe
High Voltage

Gas-Insulated Substations – GIS

A gas-insulated substation (GIS) uses a superior dielectric gas, SF6, at moderate pressure for phase-tophase and phase-to-ground insulation. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage… Read more

Nov 10, 2010 | By Edvard

Gas-Insulated Substations - GIS
Medium Voltage

Comparison Between Vacuum and SF6 Circuit Breaker

Until recently oil circuit breakers were used in large numbers for Medium voltage Distribution system in many medium voltage switchgears. There are number of disadvantages of using oil as quenching… Read more

Sep 05, 2010 | By Edvard

Comparison Between Vacuum and SF6 Circuit Breaker


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