Engineering English
Potential Transformer
Electrical Engineering · Last updated: July 30, 2026 · How this entry was written
Definition: An instrument transformer that steps down high voltage to a lower, safe value for metering, protection, and control applications.
Example in context
“The potential transformer on the 132 kV bus provides voltage signals to the distance protection relay.”
“132 kV baradaki gerilim trafosu, mesafe koruma rölesine voltaj sinyalleri sağlar.”
Where engineers use it
Potential transformers are connected to high-voltage buses and lines to provide accurate voltage samples for revenue metering, synchronism checks, and protection schemes. Engineers rely on them to convert primary voltage to standard secondary values.
Synonyms: PT, voltage transformer
Practice: can you use “Potential Transformer” at work?
During commissioning of a new substation, an engineer must test the potential transformer secondary voltage to confirm it matches the protection relay's required input range.
Show a model answer
“Verify the potential transformer fuse is intact before energizing the panel.”
“Potential Transformer” in 21 languages
| English | Potential Transformer |
|---|---|
| Turkish | gerilim trafosu |
| French | transformateur de tension |
| German | Spannungswandler |
| Spanish | transformador de potencial |
| Chinese | 电压互感器 |
| Arabic | محول الجهد |
| Portuguese | transformador de potencial |
| Russian | трансформатор напряжения |
| Japanese | 計器用変圧器 |
| Italian | trasformatore di tensione |
| Vietnamese | biến điện áp |
| Hindi | विभव ट्रांसफॉर्मर |
| Thai | หม้อแปลงแรงดัน |
| Indonesian | transformator tegangan |
| Korean | 계기용 변압기 |
| Bengali | পটেনশিয়াল ট্রান্সফরমার |
| Dutch | spanningstransformator |
| Swedish | spänningstransformator |
| Finnish | jännitemuuntaja |
| Ukrainian | трансформатор напруги |
Frequently asked questions
What does Potential Transformer mean in engineering?
An instrument transformer that steps down high voltage to a lower, safe value for metering, protection, and control applications. In Electrical Engineering, the term carries a usage-frequency rating of 10/10 in the Engineering English library.
How do you pronounce Potential Transformer?
Potential Transformer is pronounced /pəˈten.ʃəl trænsˈfɔːr.mər/ (IPA). The Engineering English app plays audio for the term and checks your pronunciation with speech recognition.
How is Potential Transformer used in a sentence?
Example from an engineering context: “The potential transformer on the 132 kV bus provides voltage signals to the distance protection relay.”
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