What is the difference between an HZCT power‑frequency and a frequency‑conversion ct pt analyzer

A power‑frequency ct pt tester is generally bulkier and heavier, and its testing scope is primarily limited to conventional current transformers and voltage transformers. In contrast, a frequency‑conversion ct pt tester features a more compact design and offers greater testing versatility. In addition to ordinary current and voltage transformers, it is capable of testing special‑type transformers, including bushing‑mounted transformers, GIS‑integrated transformers, and those requiring both transient and steady‑state testing. (Frequency‑conversion technology is now widely adopted in most general‑purpose test output systems.)