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Archive: Category «Medium Voltage»

AIS – Air insulated substations

In large, modern AC power systems, the transmission and distribution systems function to deliver bulk power from generating sources to users at the load centers. Transmission systems generally include generation… Read more

Sep 06, 2011 | Edvard

Air Insulated Packaged Substations and Components

Budgeting and Financing Substation

The construction of new substations and the expansion of existing facilities are commonplace projects in electric utilities. However, due to the complexity, very few utility employees are familiar with the… Read more

Aug 16, 2011 | Edvard

Budgeting and Financing Substation

GIS vs AIS – Life cycle assessment

In order to ensure the future supply of electricity we require sustainable concepts that preserve resources and do not harm our environment. Humankind needs a reliable and secure power supply… Read more

Jul 14, 2011 | Edvard

gis-vs-ais-life-cycle-assessment

Power Fuses in High Voltage

Power fuses are a generally accepted means of protecting power transformers in distribution substations. The primary purpose of a power fuse is to provide interruption of permanent faults. Fusing is… Read more

Jul 11, 2011 | Edvard

power-fuses-in-high-voltage

ABB – AIS UniGear ZS1 design features

UniGear ZS1 is medium voltage switchgear with a metal enclosure, suitable for indoor installations. Metal partitions segregate the compartments from each other and the live parts are air-insulated. Since the… Read more

Jun 06, 2011 | Edvard

ABB - AIS (air insulated switchgear) UNIGEAR ZS1

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 | Edvard

Maintenance Of Meduim Voltage Circuit Breakers

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 | Edvard

MiCOM P139 Feeder Management and Bay Control