|Statement||Supervised by: Bickford, J.P..|
|Contributions||Bickford, J. P., Supervisor., Electrical Engineering and Electronics.|
Substations generally have switching, protection and control equipment and one or more transformers. In a large substation, circuit breakers are used to interrupt any short-circuits or overload currents that may occur on the network. Smaller distribution stations may use re-closer circuit breakers or fuses for protection of distribution circuits. In a shunt application, a surge diverter is installed between supply active and neutral and between neutral and earth. Most MOV-based shunt surge diverters clamp at a certain voltage, which is above the supply voltage. Typically, surge diverters have a clamp voltage of above V . REFERENCE IEEE Working Group Application of Surge Protective Devices Subcommittee Surge Protective Devices committee, ”Modeling of Metal Oxide Surge Arrester,” IEEE Transaction on Power Delivery, Vol.7, No.1, pp , January surge diverters 1. SURGE DIVERTER 2. Surges, or transients, are brief overvoltage spikes or disturbances on a power waveform that can damage, degrade, or destroy electronic equipment within any home, commercial building, or manufacturing facility. Transients can reach amplitudes of tens of thousands of volts. Surges are measured in microseconds.
Novaris High Voltage Surge Diverters are engineered for system voltages greater than /V. Applications include but not limited to mining equipment, airport runway lighting and railway signalling. Each surge diverter consists of a pluggable protection module and . Water & Waste Water Treatment Facilities. Water and wastewater organizations of any municipality have a major investment in facilities and equipment. The repair and replacement of electric/electronic equipment is a major consumer of annual budget dollars. Guidelines for Providing Surge Protection Introduction When it comes to losses of electrical and electronic equipment, few events can match the destruction caused by surges (transients) and electrical noise. These phenomena are responsible for about 50% of most electronic equipment failures today. Without surge relief the pressure spikes to around 10 times the normal line pressure. As the pressure wave created propagates along the line, the cycling effect occurs. The effect on pressure if a surge pressure relief valve is used (shown below). The larger the capacity of the surge relief control valve, the lower the pressure spike.
SURGE OVER-VOLTAGE PROTECTION FOR SUBSTATIONS Mohamed Adel Abdallah Faculty of Eng. Beirut Arab University BEIRUT - LEBANON Abstract: The protection against line surges entering an electrical substation; or a solitary step-down transformer has been limited to the installation of a conventional line voltage arrester. Protection against transient voltage surges is achieved by the help of Surge arrtestors. The surge arrestors, coordinated spark gaps, surge suppressors, over heard ground wires, neutral earthing, shunt capacitors etc. are located strategically to intercept the lightening surges . enclose substations with energized electrical conductors or equipment. n This metal fence grounding requirement may be accomplished by bonding the fence to the substation grounding grid or to a separate underground conductor below or near the fence line using the methods described in the NESC. IEEE Recommended Practice on Characterization of Surge Voltages in Low Voltage AC Power Circuits: Codes & Standards Guideline ANSI/IEEE C IEEE Recommended Practice on Surge Testing for Equipment Connected to Low Voltage AC Power Circuits: ANSI/IEEE C IEEE Recommended Practice on the Application of Surge Protective Devices in.