The 3WA9111-0ES15 is an accessory air circuit breaker equipped with firmware modules designed to enhance protective functions. It supports various protection features including monitoring of unbalance, voltage, power, frequency, total harmonic distortion (THD) of current and voltage, as well as under-voltage and over-voltage conditions. The device incorporates a main contact system suitable for three-pole breakers with a frame size of 2 and a breaking capacity rated at 4000A across different protection configurations. Its functionalities are tailored to improve the safety and reliability of electrical distribution systems by providing comprehensive protective and monitoring capabilities.

Siemens is a global leader in industrial automation, digitalisation, and electrification, offering products such as PLCs, drives, industrial robots, and process control systems. Known for innovation and sustainability, Siemens’ technologies enhance efficiency, safety, and performance across industries like manufacturing, energy, and healthcare.

***CJS Automation is NOT an authorised distributor of Siemens***