Designed for metering, monitoring, and relay protection applications, Xifa Instrument Transformers are widely applied in compact substations, switchgear, and electrical panels. Relying on real project experience from renewable energy stations, urban infrastructure, and utility systems, Wenzhou Xifa Electric Equipment Co., Ltd. focuses on stable accuracy class, strong insulation performance, and long service life under complex grid conditions.
All Instrument Transformers are produced in Xifa’s China factory under ISO 9001 and ISO 14001 management systems, with technical specifications compliant with CE and UL standards. As an experienced Instrument Transformer manufacturer and supplier, Xifa supports flexible customization, consistent batch quality, and competitive pricing, helping global buyers reduce sourcing risk while ensuring reliable power system operation.
An instrument transformer is a category of transformer used in electrical power systems to steps down voltage or current in high voltage side to a lower and standardized value so that meters and relays can handle. The main function is to supply an electrical signal for meters and protective relays to detect. Thus the instrument transformer can be classified as current transformer and potential transformer.
It has three main reason to explain why current transformer CT and potential transformer PT are called instrument transformers.
1. the primary purpose of current transformer CT and potential transformer PT is to interface instruments, such as meters, relays, and protection devices, with high power circuits.
2. Current transformer CT and potential transformer PT often serve measurement and protection rather than power distribution. The main circuits, which has a higher currents or voltages, are not directly measured by the instruments. Fortunately, the current transformer CT and potential transformer PT provide a scaled down replica for the instrument.
3. Current transformer CT and potential transformer PT step down high voltages and currents to a standardized value to protect instruments and operator in safety. Meanwhile, it allows instruments to be designed according to a fixed secondary values.
