This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.
Always specify CTs by referencing EN 61869-2 including accuracy class, rated burden, ALF (for protection), and FS (for metering). Avoid relying on superseded 60044-1 standards for new equipment. Report prepared for technical and compliance use. Always refer to the official standard text for full legal and design requirements.
| Type | Application | Accuracy classes (examples) | Notes | |------|-------------|----------------------------|-------| | | Billing, panel meters | 0.1, 0.2, 0.5, 1, 3 | Low phase error, high accuracy at normal load. | | Protection CTs | Relay inputs, fault detection | 5P, 10P (also PX/TPX/TPY/TPZ for special cases) | High accuracy under fault currents. | | Dual-purpose CTs | Both measurement & protection | e.g., 0.5/5P | Two cores or composite class rating. |
1. Document Identification & Scope Standard: EN 61869-2 Title: Instrument transformers – Part 2: Additional requirements for current transformers Based on: IEC 61869-2 (Edition 1.0, 2012-10) Supersedes: EN 60044-1 (former standard for inductive current transformers)