3UF1857-3EA00

Part number 3UF1857-3EA00 from Siemens is identified as a current transformer that efficiently handles electrical measurements in a 3-phase system. It supports a primary current of 500 A, efficiently transforming this high current to a more manageable secondary measurement of 1.0 A, suitable for integration with relays or meters designed for lower current levels. This transformer comprises 3 poles, making it ideal for 3-phase applications, ensuring balanced measurements across all phases.

The transformer holds an IP00 protection rating, denoting it does not provide protection against dust or moisture, which restricts its usability to controlled environments. It utilizes natural air cooling to maintain optimal operating temperatures. The operating temperature range spans from 0°C to 40°C, allowing it to function effectively within typical electrical environments. In terms of humidity control, it can tolerate operating and storage conditions with up to 80% relative humidity, provided there is no condensation present. For applications at higher altitudes, this device can perform reliably up to 1000 meters above sea level, making it versatile for various installation locations.