Capacitive bushing is mainly used for main transformer output line of 110kV grade and above. The end screen of bushing is an important signal picking location for detecting parameters such as local discharge and dielectric loss of main transformer. The main transformer cannot open the protective cover of the casing end screen in the running state. In order to pick up local discharge and dielectric loss signals in the running state, the current method is to lead the grounding wire of the casing end screen to the ground, but this changes the grounding mode to a certain extent and poses a certain risk to the safe operation.
BNWXL-BTM-A transformer bushing adapter is developed to solve the above problems. It adopts miniaturized sensing technology to embed the current end screen protective cover. The structure and the existing end screen protective cover can be completely replaced, without changing the original electrical characteristics, the partial discharge, grounding current and other signals are extracted with high quality, which provides a convenient and risk-free detection method for the live detection and online monitoring of the main transformer.
High sensitivity, can accurately measure μA level current, high measurement accuracy and good linearity;
High security, multiple shielding, strong anti-interference ability, can work in complex environment;
High reliability, internal epoxy resin potting and curing, reaching IP68 (submersible) protection level, the service life is equivalent to that of the casing, waterproof and anti-corrosion, and can work outdoors for a long time;
Wide applicability, the sensor signal can be used for live detection, and can also be used as a signal source for online monitoring;
Easy to install, aviation plug-in output, and the strcucture can be completely interchangeable with various casing end screen covers currently in use, and the replacement can be completed within tens of seconds;
Size can be customized by customers.
|IC||Max Power Consumption||20mA|
|f||Operating Frequency||50-400 Hz|
|TA||Operating Temperature||-40oC… +85oC|
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