Archive: Category «High Voltage»

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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


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


Construction and service life of GIS

GIS is assembled of standard equipment modules (circuit breaker, current transformers, voltage transformers, disconnect and ground switches, interconnecting bus, surge arresters, and connections to the rest of the electric power… Read more

Jun 04, 2011 | Edvard

Figure 2.1 Single-phase enclosure GIS

GIS control system

For ease of operation and convenience in wiring the GIS back to the substation control room, a local control cabinet (LCC) is provided for each circuit breaker position (Figure 1)…. Read more

May 29, 2011 | Edvard

GIS control system

Grounding on wood pole transmission structures

Preferred three-phase grounding applications on wood pole structures using grounding cluster bars are shown in figures 1 and 2. Grounding cluster bars must be positioned just below the lowest elevation… Read more

Apr 26, 2011 | Edvard

Figure 3. – Example ground cluster bar attached to wood pole

HGI generator circuit breaker – ABB

The circuit-breakers type HGI can be used as generator circuit-breaker in all types of power plants with unit sizes between 60 – 180 MVA and nominal voltages up to 21kV…. Read more

Apr 05, 2011 | Edvard

ABB Generator Circuit-Breakers Type HGI

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
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