High Voltage
GIS vs AIS – Substation Earthing
Compressed SF6 gas used in MV and HV switchgears as an insulating medium has led to the development of compact gas-insulated substation (CIS) technology (figure 1). GIS , having many… Read more
Sep 12, 2011 | By Edvard Csanyi
High Voltage
What Is a Load Break Switch?
A load break switch is a disconnect switch that has been designed to provide making or breaking of specified currents. This is accomplished by addition of equipment that increases the… Read more
Sep 08, 2011 | By Edvard Csanyi
High Voltage
Oil-Filled Equipment in Substation – IEEE 980-1994 (R2001)
A number of electrical apparatus installed in substations are filled with oil that provides the necessary insulation characteristics and assures their required performance. Electrical faults in this power equipment can… Read more
Sep 07, 2011 | By Edvard Csanyi
High 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 | By Edvard Csanyi
High Voltage
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 | By Edvard Csanyi
Medium Voltage
Standards and applications of medium voltage Bus Duct
Bus duct is used for the effective and efficient supply of electricity in mostly industrial locations. Copper or aluminum is used for the conductor of bus duct that be insulated… Read more
Aug 01, 2011 | By Edvard Csanyi
High Voltage
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 | By Edvard Csanyi
High Voltage
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 | By Edvard Csanyi
Medium 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 | By Edvard Csanyi
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 Csanyi
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 Csanyi
Medium Voltage
PIX metal-clad switchgear – Schneider Electric
The PIX metal-clad switchboards are extensible on both sides and consist of modular functional units, linked by a busbar, and connected to the substation earth via an earthing bus. The… Read more
Mar 21, 2011 | By Edvard Csanyi
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 Csanyi
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 Csanyi
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 Csanyi
