Siemens 3RT2627-1AL25 SIRIUS Capacitor Contactor 25 kVAr, 230V AC, Size S0 Original Brand New

Overview

The Siemens 3RT2627-1AL25 is a SIRIUS series capacitor contactor specifically engineered for switching capacitive loads in reactive current compensation systems. Designed to meet the stringent AC-6b standard, this 3-pole contactor is rated for 25 kVAr at 400 V. Its core innovation lies in the use of precharging resistors, which are engaged by leading auxiliary contacts just before the main contacts close. This mechanism effectively limits the inrush current peaks of capacitive loads, minimizing disturbances to the power supply network and extending the lifespan of the equipment.

This robust and reliable contactor is suitable for a wide range of applications, including switching both choked and unchoked capacitors. It comes equipped with a 230 V AC coil for 50/60 Hz operation and features convenient screw terminals for secure wiring. The device is built in a compact Size S0 frame and includes a total of 1 Normally Open (NO) and 2 Normally Closed (NC) auxiliary contacts, providing flexibility for control and signaling purposes.

Key Benefit

• Network Stability: The integrated precharging resistors significantly reduce inrush current peaks, protecting the power grid and downstream equipment from voltage sags and harmonics.
• Enhanced Longevity: By limiting electrical stress during switching, the contactor helps prolong the life of both the capacitors and the contactor itself.
• Versatile Application: Ideal for use in reactive power compensation systems and for switching converters, ensuring reliable performance in demanding environments.
• High Reliability: Built to a high standard, the Siemens SIRIUS series is renowned for its durability and consistent performance.
• Flexible Control: The inclusion of 1 NO and 2 NC auxiliary contacts allows for easy integration into complex control circuits and monitoring systems.

Function and Technical Details

• Product Number: 3RT2627-1AL25
• Standards: Adheres to leading international standards including IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, and IEC 61921, ensuring global compliance and safety.
• Switching Capacity: Rated for AC-6b operation up to 25 kVAr at 400 V, specifically for capacitive loads.
• Coil Voltage: 230 V AC, 50/60 Hz.
• Auxiliary Contacts: 1 Normally Open (NO) and 2 Normally Closed (NC) contacts.
• Terminals: Screw terminals for secure and reliable electrical connections.
• Frame Size: S0.
• Operation: The contactor’s unique function involves the closing of precharging resistor-equipped auxiliary contacts before the main contacts, which limits the charging current of capacitive loads.
• Expansion Possibilities: The basic unit is expandable with additional lateral auxiliary switches to meet more complex control requirements.

Protection and Safety

• Short-circuit and Overload Protection: It is crucial to use appropriate protection measures for all main, auxiliary, and control connections. Refer to the technical product data sheet and configuration manuals for detailed recommendations.
• Overvoltage Protection: The control circuit can be protected against opening surges by retrofitting surge suppressors (RC elements, varistors, or diodes), which are available as separate accessories.

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