The Siemens 3VA7021-G is a molded case circuit breaker (MCCB) designed for robust and reliable protection of electrical circuits in industrial and commercial applications. This particular model is part of the 3VA series known for its advanced features and dependable performance. It provides essential overload and short-circuit protection, ensuring the safety and longevity of electrical equipment and systems.

Applications:

• Main distribution boards
• Sub-distribution boards
• Motor starters
• Power supply units
• Renewable energy installations (solar, wind)

Features:

• Rated Current: Specifies the maximum continuous current the breaker can carry (Exact amperage depends on the specific sub-model of 3VA7021-G). Typically ranges from 16A to 25A.
• Breaking Capacity: High breaking capacity to safely interrupt fault currents.
• Number of Poles: Usually available in 3-pole and 4-pole configurations.
• Trip Unit: Electronic trip unit providing adjustable protection settings.
• Voltage Rating: Suitable for systems up to 690V AC.
• Overload Protection: Adjustable overload settings to precisely match load requirements.
• Short-circuit Protection: Instantaneous and short-time delay short-circuit protection.
• Compliance: Meets IEC 60947-2 standards.
• Mounting: DIN rail mounting for easy installation.
• Accessories: Compatible with a wide range of accessories, including auxiliary contacts, shunt trips, and undervoltage releases.

Benefits:

• Enhanced System Protection: Prevents damage to electrical equipment due to overloads and short circuits.
• Improved Safety: Fast response to fault conditions ensures personnel and equipment safety.
• Increased Uptime: Minimizes downtime by quickly isolating faults.
• Flexible Configuration: Adjustable trip settings allow customization for specific applications.
• Easy Installation: DIN rail mounting simplifies installation procedures.
• Reliable Performance: Siemens quality ensures long-term, dependable operation.
• Compliance with Industry Standards: Meets IEC 60947-2 standards, guaranteeing quality and reliability.

Additional Details:

The Siemens 3VA7 series MCCBs are designed for ease of use and maintenance. The electronic trip unit allows precise adjustment of protection parameters, ensuring optimal protection for connected equipment. The availability of various accessories enhances the flexibility and adaptability of the 3VA7021-G circuit breaker. Proper selection of the appropriate current rating and breaking capacity is critical for ensuring the reliable and safe operation of electrical systems. Ensure to consult the Siemens documentation for the specific sub-model of 3VA7021-G being used to determine the exact current ratings and other technical specifications.