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Design and construction of condenser bushing the general constructional details are shown in fig.
Outdoor bushing current transformer. Your solution is meramec s outdoor mounted slip over bushing current transformer. Bushing failures are the most common cause of transformer fires and explosions. Installation time is minimum since it is not necessary to remove bushings or open the tank for mounting. Bushings cause 17 of all power transformer failures and are the third most common reason for breakdowns 1.
Bushing failures right 1. These transformers are used primarily for relaying but may also be used for metering where. Type b07 current transformers are for use over outdoor bushings of power transformers bulk oil circuit breakers and other dead tank circuit breakers. The toroidal core is continuously tape wound using cold rolled grain oriented electrical grade silicon steel which receives a full stress relief anneal after it is wound to its specified dimensions.
Outdoor transformer bushings are manufactured in accordance with iec60137 and product standards such as en50386 en50180 evolutions of the old din standards 42531 42532 etc which are no longer current but typically may still be specified. The insulation of the bushing provides the dielectric protection for the ct. In an installation where it is desirable for the ct to see the bushing flash over current. The range of standard transformer bushings that can be supplied are up to 52kv and 12 500a these.
The top of the current transformer. Obct ansi bushing current transformer low voltage multi ratio externally mounted 25 60 hz 600 3000 primary current externally mounted bushing current transformers are designed for use on existing power transformers or circuit breakers for relaying purposes. The outdoor bushing current transformer is used for relaying and metering on existing power transformers or circuit breakers. Due to varying bushing dimensions it is recom mended that the power transformer or circuit breaker.
The gct 848 indoor outdoor board mounted generator current transformer is a 600 v 10 kv bil rated unit and designed to fit over a variety of specified bushing sizes. The b07 bushing type mounts externally over the apparatus bushing on the cover of the apparatus. Failures with fire and explosion left.
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Porcelain Bushings Should Be Regularly Checked For Cracks And Or Contamination If The Bushing Is Damaged Or Heav High Voltage Electrical Substation Prevention
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