Siemens 3RV2811-1JD10 Transformer Protection Circuit Breaker

Siemens 3RV2811-1JD10 Transformer Protection Circuit Breaker is a compact S00-frame protective device designed for transformer protection in distribution boards and switchgear. It carries UL 489 and CSA C22.2 No. 5-02 approvals and offers an A‑release thermal overload at 10 A, coupled with a short‑circuit release rated at 208 A, enabling fast isolation of fault currents while meeting common industry standards. This unit is rated for up to 690 V across the main circuit and is wired via screw terminals for secure field connections. With a nominal current rating (In) of 10 A (as indicated by the JD10 designation), the breaker is suited to protect transformer windings and the associated protection circuitry in industrial installations. Ambient operating temperature ranges from -20 to 60 °C, suitable for typical plant environments, and the device is part of the Sirius 3RV2 family, known for transformer protection applications. Use cases include transformer feeder protection in control panels, substations, and power distribution systems, where reliable interruption of fault currents and coordination with protective relays are required.