Evaluation Study of 150 kV Current Transformer at Bayline 1 Kota Bangun Bukit Biru Substation

DOI

10.2991/978-94-6463-732-8_43How to use a DOI?

Keywords

Current Transformer; Inspection; Operational Feasibility

Abstract

The electrical power system comprises a generator, transmission, and distribution components. The substation is part of the electrical transmission system and contains a variety of equipment, including a 150 kV current transformer, which function is to measure electric current and to support protection needs. To maintain the operational feasibility of the current transformer, inspections must be conducted. This research aim is to determine the condition of the current transformers that are operating properly, whether they are still suitable for use, or if replacement is necessary to maintain the reliability of the electric power system assessed using PT.PLN (Persero) standards SK-DIR No 0520–2.K/DIR/2014. For the research method, there are three levels of inspection: In-Service Inspection, In-Service Measurement, and Shutdown Measurement The results from the visual inspection indicate that the current transformer is in good condition. During the second level, using the thermovision method, on clamp and conductor ∆T finale, the highest temperature was 4.672 ℃, while the highest temperature for the interphase isolator and housing was 0.7 ℃. In the third level of inspection, the results were as follows: the highest ratio error from the ratio testing was -0.066% on the first core; the lowest resistance from the insulation testing was 1.33 GΩ at the secondary 2-ground phase T measuring point; the grounding resistance testing showed a resistance of 0.02 Ω; the highest tan δ value recorded was 0.2037%; and the burden testing indicated the highest burden of the current transformer was 19.25 VA. Based on 3 levels of inspection, and by the established PT.PLN (Persero) standards, SK-DIR No 0520–2.K/DIR/2014, the condition of the current transformer is deemed normal.

Copyright

© 2025 The Author(s)

Open Access

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TY  - CONF
AU  - Gabriel Sumampouw
AU  - Restu Mukti Utomo
AU  - Aji Ery Burhandenny
AU  - Fatkhul Hani Rumawan
AU  - Arif Harjanto
AU  - Nur Rani Alham
AU  - Muslimin Muslimin
PY  - 2025
DA  - 2025/06/07
TI  - Evaluation Study of 150 kV Current Transformer at Bayline 1 Kota Bangun Bukit Biru Substation
BT  - Proceedings of the International Conference on Tropical Studies and Its Application (ICTROPS 2024)
PB  - Atlantis Press
SP  - 476
EP  - 488
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-732-8_43
DO  - 10.2991/978-94-6463-732-8_43
ID  - Sumampouw2025
ER  -