Siemens 3RT2625-1AV05 Capacitor Contactor 16.7 kVAr, 400V AC, 1NO + 2NC, Size S0 Original Brand New

Overview

The Siemens 3RT2625-1AV05 is a specialized capacitor contactor designed for the reliable switching of capacitive loads up to 16.7 kVAr at 400 V. This 3-pole contactor is a key component in reactive current compensation systems, helping to improve power quality and efficiency.

Its unique design features precharging resistors that engage via leading auxiliary contacts, effectively limiting the peak charging current of capacitors. This minimizes disturbances on the power supply network and protects your equipment.

This robust contactor operates on a 400 V AC, 50 Hz control supply voltage and includes a comprehensive set of auxiliary contacts (1 NO + 2 NC) for flexible integration into your control circuits. The screw terminals ensure a secure and straightforward connection. With a compact Size S0 form factor, the 3RT2625-1AV05 is an ideal solution for a wide range of industrial and commercial applications.

Key Features and Benefits

• Capacitive Load Switching: Specifically engineered for AC-6b applications, ensuring safe and efficient switching of capacitors.
• Peak Current Limitation: Integrated precharging resistors with leading auxiliary contacts minimize inrush current, protecting the power grid and extending the life of your components.
• High Performance: Handles capacitive loads up to 16.7 kVAr at 400 V, making it suitable for various reactive power compensation systems.
• Flexible Control: Equipped with a versatile 1 NO + 2 NC auxiliary contact configuration, allowing for easy integration and control.
• Robust and Reliable: Built to Siemens’ high standards, meeting international standards including IEC 60947-1 and IEC 61921.
• Easy Installation: Features screw terminals for quick and secure wiring. The Size S0 form factor allows for efficient use of panel space.
• Expandable: Can be retrofitted with surge suppressors for overvoltage protection and expanded with additional auxiliary switches (sold separately) for enhanced functionality.

Functions

The Siemens 3RT26 contactors are special versions of the 3RT2 series, purpose-built for switching capacitive loads. They operate by using leading auxiliary contacts to engage precharging resistors before the main contacts close. This critical function limits the high inrush currents that occur when switching capacitors, which can otherwise cause voltage sags, equipment stress, and premature failure. The 3RT2625-1AV05 is perfect for:

• Switching choked or unchoked capacitors in reactive current compensation systems.
• Controlling converters and other devices with significant capacitive loads.
• Improving power factor and reducing energy costs in industrial and commercial facilities.

Standards

The 3RT2625-1AV05 conforms to the following international standards, ensuring quality, safety, and compatibility:

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

Protection and Safety

For optimal performance and safety, proper protection measures must be implemented.

• Short-circuit and overload protection of main connections: Refer to the technical product data sheet for information on protecting a standalone contactor or consult the Digital Configuration Manual for load feeders for device combinations.
• Short-circuit and overload protection of auxiliary and control circuits: The relevant standards and regulations for control panel configuration must be followed. Suitable protection devices, such as miniature circuit breakers, or power supplies with current-limiting functions are recommended.
• Overvoltage protection: The coil circuit can be protected against opening surges by retrofitting surge suppressors (RC elements, varistors, etc.) which are available as separate accessories.

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