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What is a condenser bushing?
Definition of Condenser Bushing: A bushing in which me- tallic or nonmetallic conducting layers are arranged within the insulating material for the purpose of controlling the distribution of the electric field of the bushing, both axially and radially by capacitive grading.
What is bushing in high voltage?
A bushing is a device for carrying one or more high voltage conductors through an earthed barrier such as a wall or a metal tank. It must provide electrical insulation for the rated voltage and for service overvoltages and also serve as mechanical support for the conductor and external connections.
What is the purpose of a bushing on a transformer?
A transformer bushing is an insulating structure that facilitates the passage of an energized, current-carrying conductor through the grounded tank of the transformer.
What are the advantages of bushing?
The main advantage of a bushing, as compared to a solid connection, is less noise and vibration are transmitted. Another advantage is that they require little to no lubrication.
Whats a bushing do?
A bushing acts as a cushion between parts and controls the amount of movement in the joints while reducing road noise, vibration and harshness.
What is difference between bushing and bearing?
A bushing is a thin tube or sleeve that allows relative motion by sliding (our type), as compared to rolling. A bushing might also be called a sleeve bearing. A bearing is the general term for something that allows relative motion between two components, surfaces, etc. Learn more about what a bearing is.
Are bushings important?
Control arm bushings are important for driving comfort and handling. They cushion the suspension system which in turn controls noise and vibrations, and also provide a softer ride over bumps. Worn or damaged bushings can allow metal on metal contact, tire wear, discomfort, noises, and vibrations.
What is primary bushing?
High-voltage (primary) bushings are used for connecting the high-voltage cables outside of the tank to the primary leads on the inside of the tank through the tank wall.
Where are bushings used?
Bushings are akin to thin tubes most commonly used for machinery with rotating or sliding shafts to improve efficiency and reduce vibration and noise. Bushings can be used for drilling operations in drill jigs, hydraulic external gear pumps and motors.
What is difference between bearing and bushing?
When should I use bushings?
Bushings are widely used for heavy-duty wheels that require high load-bearing tolerances. Bushings are self-lubricating, and therefore ideal for low-maintenance or maintenance-free operations. Self-lubrication is achieved through a uniform pattern of indents on the surface of the bushing that act as grease reservoirs.
How does a bushing work?
How does a bushing work? Bushings, also called sleeve bearings, are just one specific type of bearings. They are made to slide over rods to provide an extremely low-friction motion. Self-lubrication is achieved through a uniform pattern of indents on the surface of the bushing that act as grease reservoirs.
What is the purpose of bushings in high voltage lines?
Before diving into details, the basic idea of a high voltage line being near to earth creates strong electric field. This May lead to flashover of charge and undesirable stress in the conductor carrying the high voltage. Thus, bushings are conductors wrapped in insulators to prevent these stresses and flash events.
What is the maximum voltage a transformer bushing can handle?
To meet as many requirements as pos- sible, bushings are configurable and are produced for system voltages up to 1,100 kV AC and 800 kV DC – even higher for test purposes. The largest bushing developed and manufactured at the Ludvika plant is an 1,800 kV AC transformer bushing with a length of 15 m.
What preventive maintenance and testing procedures should be performed on HV bushings?
To prevent electrical catastrophes and optimize HV bushing service life, the following preventive maintenance and testing procedures should be performed at regular intervals. Porcelain bushings should be regularly checked for cracks and/or contamination.
What happens when the capacitance value of a bushing increases?
If the capacitance value increases, this is usually an indication of the partial breakdown on the inside of the condenser core. Due to this the field stress inside the bushing will increase and will lead to eventual breakdown of the condenser core of the bushing.