Siemens 3RT2628-1BB45 Capacitor Contactor for AC-6b Application 33 kVAr, 400V, 24V DC Original Brand New

Overview

The Siemens 3RT2628-1BB45 is a high-performance capacitor contactor from the SIRIUS series, specifically engineered for switching capacitive loads in AC-6b applications. This robust device is ideal for reactive current compensation systems and converters, providing reliable operation up to 33 kVAr at 400V. Its unique design incorporates precharging resistors that limit peak charging currents, minimizing disturbances on the power supply network and extending the lifespan of your equipment.

Key Features & Benefits

• Optimized for Capacitive Loads: Designed for the demanding AC-6b switching category, effectively managing capacitive loads up to 33 kVAr at 400V.
• Surge Current Limitation: Integrated precharging resistors, activated by leading auxiliary contacts, drastically reduce the inrush current spikes associated with switching capacitors. This protects the contactor and the power grid.
• Compact & Robust Design: The S0 size is space-efficient, while the durable construction ensures long-lasting performance in industrial environments.
• Flexible Control: Features a 24V DC coil, compatible with a wide range of control circuits.
• Comprehensive Auxiliary Contacts: Comes equipped with 1 normally open (NO) and 2 normally closed (NC) auxiliary contacts, providing flexibility for control and monitoring circuits.
• Easy Installation: Utilizes reliable screw terminals for secure and straightforward wiring.
• Adherence to Global Standards: Manufactured in compliance with key international standards including IEC 60947-1, IEC 60947-4-1, and others, ensuring safety and compatibility.

Functions

The Siemens 3RT2628-1BB45 capacitor contactor is a specialized version of the SIRIUS 3RT2 contactor family. Its primary function is to switch choked or unchoked capacitors within reactive current compensation systems. The key functional component is a set of precharging resistors, which are briefly connected to the circuit before the main contacts close. This limits the high inrush currents that occur when connecting a capacitive load, preventing welding of the main contacts and reducing stress on the electrical system.

Protection and Configuration

• Short-circuit and overload protection: For a stand-alone contactor, refer to the technical product data sheet. For device combinations, consult the Digital Configuration Manual for load feeders.
• Auxiliary and control circuit protection: Adhere to relevant standards for control panel design. Use a suitable power supply or protection devices, such as miniature circuit breakers, considering the contactor’s load characteristics.
• Overvoltage Protection: The contactor can be retrofitted with optional surge suppressors (RC elements, varistors, or diodes) to damp opening surges in the coil. These accessories must be ordered separately.

Auxiliary Switches

• The 3RT2628-1BB45 (a 3RT262 contactor) is equipped with a 4-pole front-mounted auxiliary switch. One of these contacts is freely accessible, while the other three are assigned to the precharging resistors.
• This model also includes two additional free auxiliary contacts (1 NO + 1 NC) as standard.
• For further expansion, additional lateral auxiliary switches can be mounted, adhering to the permissible configuration guidelines.

Shop with Confidence

At Turll, we are committed to providing high-quality industrial automation components. The Siemens 3RT2628-1BB45 capacitor contactor is a reliable and essential component for managing capacitive loads efficiently. For more information on this and our other products, please visit our website.