Siemens 3RT2626-1AP05 Capacitor Contactor, 20 kVAR / 400 V, 3-Pole, 230 V AC Coil, Size S0 Original Brand New

Overview

The Siemens 3RT2626-1AP05 is a specialized capacitor contactor from the SIRIUS 3RT26 series, engineered for the safe and efficient switching of capacitive loads. Designed for applications in reactive power compensation systems, this contactor prevents damaging inrush currents by utilizing integrated precharging resistors. Its robust design and reliable performance make it an ideal choice for maintaining stable power quality in industrial and commercial electrical systems.

Key Features & Benefit

• Efficient Capacitor Switching: Specifically designed for AC-6b applications, this contactor effectively handles the high inrush currents associated with switching capacitors, protecting your electrical network from harmful transients.
• Integrated Precharging Resistors: The core of its design, these resistors are engaged via leading auxiliary contacts to limit peak charging currents, minimizing stress on the power supply and connected equipment.
• Reactive Power Compensation: Perfect for use in power factor correction systems, the 3RT2626-1AP05 helps improve energy efficiency, reduce utility bills, and ensure compliance with power quality standards.
• Reliable Performance: Built to Siemens’ high-quality standards, the 3RT26 series ensures long-term durability and operational reliability in demanding industrial environments.
• Compact & Versatile: As a size S0 contactor, it offers a space-saving solution without compromising on performance. The screw terminals provide a secure and straightforward connection method.

Standards & Certifications

This product adheres to a range of international standards, ensuring its safety and performance:

• IEC 60947‑1
• IEC 60947‑4‑1
• IEC 60947‑5‑1
• IEC 60831‑1
• IEC 61921

Application & Function

The Siemens 3RT2626-1AP05 is a specialized component for switching capacitive loads in power factor correction and reactive power compensation systems. By using leading auxiliary contacts to connect precharging resistors, it effectively dampens the high inrush currents that occur when switching capacitors. This prevents contact welding, minimizes voltage dips, and protects the capacitors and the entire electrical system from damage. It is suitable for both choked and unchoked capacitor banks.

Protection & Safety

Proper protection of the contactor and its connections is crucial for safe and reliable operation.

• Short-Circuit & Overload Protection (Main Connections): For detailed information on protecting the main circuit, refer to the technical product data sheet or the Digital/Configuration Manuals for load feeders.
• Short-Circuit & Overload Protection (Auxiliary Connections): Protection for the auxiliary contacts is specified in the technical product data sheet.
• Overvoltage Protection (Control Connections): For additional overvoltage protection on the control side, surge suppressors such as RC elements, varistors, or diodes can be added as separate accessories.

Expandability & Configuration

The basic unit is equipped with integrated auxiliary contacts for the precharging resistors and two additional free auxiliary contacts (1 NO + 1 NC). This configuration is standard for the 3RT262 series.

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