ABB 1SDA066809R1 Molded Case Circuit Breaker

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1. Product Overview

The ABB 1SDA066809R1 is a low-voltage molded case circuit breaker (MCCB) from the ABB SACE Tmax XT1B series. It features a thermal‑magnetic trip unit that provides reliable protection against overloads and short circuits in industrial, commercial, and infrastructure distribution systems. The compact design allows easy installation in distribution panels and supports multiple voltage ratings.

2. Main Technical Specifications

3. Advantages and Features

1. High-Performance Protection
   Thermal‑magnetic trip unit quickly interrupts circuits, protecting equipment from overloads and short circuits.

2. Wide Voltage Compatibility
   Supports AC up to 690 V and DC up to 500 V for versatile industrial applications.

3. Compact Industrial Design
   Front-terminal configuration and modular construction allow easy installation in distribution panels.

4. High Durability
   Long mechanical life suitable for high-operation environments, providing stable long-term performance.

5. International Standards Compliance
   Designed according to IEC/EN 60947‑2 for reliable and safe global application.

4. Typical Applications

• Low-voltage distribution in industrial and commercial systems

• Main and branch circuit protection in buildings

• Power supply protection for machinery and production lines

• Distribution protection in wind and solar power systems

• Electrical panels in public infrastructure and utilities

5. Installation and Operation Notes

1. Verify Rating: Ensure the breaker's current and voltage ratings match the system requirements.

2. Correct Wiring: Follow wiring diagrams and tighten terminals securely to ensure reliable contact.

3. Environment: Install in dry, ventilated locations, free of corrosive gases.

4. Functional Testing: Perform no-load testing before energizing to verify proper operation.

5. Regular Maintenance: Periodically inspect connections, mechanical operation, and overall condition to ensure long-term reliability.

The structure and details of the product：

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