Siemens 3RT2636-1AP05 Capacitor Contactor 50 kVAr, 400V, 230V AC Coil, 2 NC Contacts, Screw Terminal Original Brand New

Overview

The Siemens 3RT2636-1AP05 is a high-performance capacitor contactor from the SIRIUS line, specifically designed for switching capacitive loads in reactive current compensation systems. This specialized contactor, size S2, is engineered to handle the unique challenges of AC-6b duty, providing a reliable and long-lasting solution for power factor correction.

Its key feature is the integration of leading auxiliary contacts and precharging resistors, which effectively limit peak inrush currents during switching. This minimizes stress on the power supply network and extends the lifespan of both the contactor and the connected capacitors. The 3RT2636-1AP05 is suitable for both choked and unchoked capacitors and can also be used in converter applications.

Benefits & Features

• Optimized for Capacitive Loads: Specifically designed with precharging resistors and leading auxiliary contacts to handle the high inrush currents of capacitive loads (AC-6b), ensuring smooth and reliable operation.
• Network Protection: By limiting peak charging currents, the contactor prevents negative impacts on the power supply network and associated equipment.
• Enhanced Durability: The design minimizes wear on the main contacts, leading to a longer service life and reduced maintenance.
• Versatile Application: Ideal for reactive power compensation systems and switching converters, making it a flexible solution for various industrial and commercial electrical setups.
• Integrated Auxiliary Contacts: Features 2 NC (Normally Closed) auxiliary contacts, which are freely usable for signaling and control circuit integration.
• Easy Installation: Equipped with robust screw terminals for secure and straightforward wiring.
• Expandable Design: The S2 size unit can be expanded with additional lateral auxiliary switches, offering customization for complex control systems.

Functionality & Protection

The 3RT2636-1AP05 operates by utilizing a clever switching sequence. When the coil is energized, leading auxiliary contacts close first, bringing precharging resistors into the circuit. This resistance limits the initial inrush current. Immediately after, the main contacts close, bypassing the resistors and connecting the full power to the capacitors. This two-step process effectively manages the charging process.

For safety and reliable operation, all connections to the contactor must be protected against short circuits, overload, and overvoltage.

• Main Connections: Protection against short-circuit and overload should be configured based on the specific application (e.g., as part of a motor feeder with an overload relay or circuit breaker).
• Auxiliary Connections: Auxiliary contacts should be protected in line with the technical product data sheet specifications.
• Control Supply: The control supply voltage connections must be protected according to relevant standards, considering the contactor’s load characteristics.
• Overvoltage Protection: Overvoltage suppressors (e.g., RC elements, varistors, diodes) can be retrofitted to the coil circuit to protect against opening surges, which must be ordered separately.

Auxiliary Contact Configuration

The 3RT2636-1AP05 (size S2) includes integrated auxiliary contacts for the precharging resistors. It also comes with a mounted 2-pole lateral auxiliary switch (1 NO + 1 NC or 2 NC, depending on the specific version).

This configuration provides the necessary contacts for the internal resistor circuit while offering freely usable contacts for external control logic. The unit can be further expanded with additional lateral auxiliary switches if more control points are needed.

For more our products visit turll.com