Diagnosis of OLTC via Duval Triangle Method and Dynamic Current Measurement

• Main Authors: Ahmad Khiar, Mohd Shahril, Md Thayoob, Yasmin Hanum, Yang Ghazali, Young Zaidey, Ab Ghani, Sharin, Sutan Chairul, Imran
• Format: Conference or Workshop Item
• Language: English
• Published: 2013
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utem.edu.my/id/eprint/12249/1/Published_Version_Shahril.pdf; http://eprints.utem.edu.my/id/eprint/12249/; http://www.sciencedirect.com/science/article/pii/S1877705813020638

Power transformers studies have shown that the main cause of power transformers failures is the On Load Tap Changer (OLTC). OLTC failure occurs due to the insulation degradation and contacts failure inside it. Other than that, contacts wear influences the OLTC performance and this phenomenon has not...