Siemens 3RT2617-1AF03 SIRIUS Capacitor Contactor 12.5 kVAr, 400V, 110V AC Coil, 1NO+1NC Aux, S00 Original Brand New

Overview

The Siemens 3RT2617-1AF03 is a specialized SIRIUS capacitor contactor from the 3RT26 series, engineered for the demanding task of switching capacitive loads (AC-6b). This robust 3-pole device is rated for loads up to 12.5 kVAr at 400 V. A key feature is the inclusion of precharging resistors, which are engaged via leading auxiliary contacts before the main contacts close. This critical design element effectively limits the inrush current, protecting the power supply network and extending the lifespan of both the contactor and the connected capacitors.

With a 110 V AC control supply voltage (50/60 Hz), this contactor is equipped with a 1 NO + 1 NC auxiliary contact configuration, making it easy to integrate into control circuits. The device uses screw terminals for secure and straightforward wiring. Its compact S00 size makes it suitable for space-constrained applications.

Key Benefit

• Minimizes Inrush Current: Integrated precharging resistors limit the high peak charging current of capacitive loads, reducing stress on the power grid and connected equipment.
• Enhanced System Protection: Designed to switch capacitive loads in reactive current compensation systems, safeguarding components and improving power quality.
• Reliable Performance: Built to IEC standards (e.g., IEC 60947 series), ensuring high reliability and safety in demanding industrial environments.
• Easy Integration: Features a common 110V AC coil and 1 NO + 1 NC auxiliary contacts, simplifying its use in new and existing control systems.
• Compact Design: The S00 size allows for efficient use of panel space.

Functions and Features

• Capacitor Switching (AC-6b): Specifically designed and rated for switching capacitive loads up to 12.5 kVAr at 400V.
• Integrated Precharging Resistors: Leading auxiliary contacts switch on resistors to limit the inrush current, a common issue with capacitive loads.
• 3-Pole Main Circuit: Provides reliable switching for three-phase systems.
• Control Supply Voltage: Operates on 110 V AC at 50/60 Hz.
• Auxiliary Contacts: Includes one normally open (1 NO) and one normally closed (1 NC) contact for feedback and interlocking in control circuits.
• Screw Terminals: Ensures a secure and reliable electrical connection.
• Size S00: A standardized compact size for easy mounting and panel integration.
• Compliance: Adheres to international standards including IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, and IEC 61921.

Standards

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

Protection Recommendations

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

• Short-Circuit and Overload Protection: Main and auxiliary connections must be protected. Consult the technical product data sheet for a free-standing contactor or the “Digital Configuration Manual for load feeders” for combinations with overload relays or circuit breakers.
• Control Supply Voltage Protection: Use a suitable power supply with current-limiting features. Consider the contactor’s inrush current and holding power when selecting protection devices like miniature circuit breakers.
• Overvoltage Protection: The control circuit can be protected against switching surges by retrofitting an optional surge suppressor (RC element, varistor, diode, etc.) which can be ordered separately.

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