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metsfan1395
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Can anyone explain why a CT would be subject to flux saturation, but a VT normally wouldn't?
http://findarticles.com/p/articles/mi_qa3792/is_/ai_n8918425"Core saturation-of protective current transformers due to the d.c. component of fault current...
dlgoff said:http://findarticles.com/p/articles/mi_qa3792/is_/ai_n8918425"
I would think that VTs would not see this d.c.component in its secondary during a line fault.
You're right. It wasn't a very good link.m.s.j said:Excuse me, I think internet searching or data gathering without referring to basic concepts cannot solve our problems. Of course this is the disadvantage of today information explosion.
CT (Current Transformer) and VT (Voltage Transformer) saturation refers to the point at which the output of the transformer stops responding proportionally to the input signal. This can occur when the input signal exceeds a certain level, causing the core of the transformer to become magnetically saturated.
CT and VT saturation can be caused by a variety of factors, including high input currents or voltages, high-frequency harmonics, and overexcitation of the transformer. It can also be caused by incorrect selection or installation of the transformer, such as using a transformer with a lower saturation level than the input signal.
When a CT or VT becomes saturated, the output signal will no longer accurately reflect the input signal. This can lead to errors in measurements and can also cause damage to the transformer if it remains in a saturated state for an extended period.
To prevent CT and VT saturation, it is important to select the appropriate transformer for the application and ensure that it is installed correctly. Additionally, using filters to reduce harmonics and limiting the input signal can help prevent saturation. Regular maintenance and testing of the transformer can also help identify and prevent saturation.
If CT and VT saturation are ignored, it can lead to inaccurate measurements, potential damage to equipment, and even safety hazards. Inaccurate measurements can result in incorrect data and incorrect decision-making based on that data. If the transformer becomes damaged, it may need to be replaced, causing downtime and additional costs. In extreme cases, ignoring saturation can lead to equipment failure or electrical accidents.