
Siemens 4RY8403-0EB11
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The Siemens 4RY8403-0EB11 is an advanced power factor controller designed for reliable and precise reactive power management in industrial and commercial electrical installations. This Model C unit is intended for door mounting and integrates seamlessly into control panels and switchgear assemblies.
Supporting current transformers with 1A and 5A secondary currents, the controller measures system voltage in the range of 200–700 V at 50/60 Hz. The control supply operates at 230 V AC, 50/60 Hz with a tolerance of ±15%, ensuring stable operation in demanding network conditions.
A clear digital multidisplay provides real-time visibility of system parameters, while automatic C/k value setting simplifies commissioning and optimizes capacitor bank control. The integrated optical RS232 interface enables straightforward communication and diagnostics.
Manufactured by Siemens in Germany, this power factor correction controller is a robust and future-ready solution for improving energy efficiency, reducing reactive power costs, and maintaining compliance with grid requirements.