DPX3 250 HP+RCD 4P 50 A 50 kA circuit breaker 423110

Safety and reliability in one device

The DPX3 250 HP+RCD circuit breaker is a comprehensive solution providing protection for electrical installations. It combines the functions of an overcurrent breaker and a residual current device (RCD), ensuring enhanced operational safety and simplifying installation. Designed to protect circuits with a rated current of 50A, it offers a high short-circuit breaking capacity of up to 50kA at 400V, ensuring effective intervention during faults and minimizing the risk of damage and hazards to personnel.

Design and application

The four-pole DPX3 250 HP+RCD circuit breaker is suitable for use in residential, commercial, and industrial electrical installations. Thanks to its wide rated voltage range (230…690V), it is universally applicable across various power systems. Equipped with three changeover auxiliary contacts, it enables easy integration with control and signaling systems. Connections are made via bolted terminals, ensuring secure and durable conductor connections. The built-in trip indicator allows rapid identification of the device’s status — whether protection has been triggered.

Advantages and benefits

• Comprehensive protection: Integration of overcurrent and RCD functions in a single device — saves space and reduces installation costs.
• High short-circuit breaking capacity: 50kA at 400V ensures effective protection against short-circuit consequences.
• Wide rated voltage range: Universal application across diverse installations (230…690V).
• Adjustable current setting: Adjustable thermal trip setting range (40…50A) allows fine-tuning to the specific characteristics of the protected circuit.
• Three auxiliary contacts: Enable integration with control and signaling systems.
• Integrated earth fault protection: Additional safety for users and installations.
• Robust construction: Fixed mounting ensures long-term stable operation.
• Expandable functionality: Optional motorized drive enables remote control of the circuit breaker.
• Complies with safety standards: Ensures conformity with applicable regulations and standards.

The use of characteristic C allows the device to respond more slowly to brief current surges, making it well-suited for starting motor-driven equipment — such as pumps, compressors, or air conditioners. It protects the circuit against overload and short-circuit, as is typical for breakers in this class. The IP30 protection rating indicates resistance to contact and ingress of tools, but it is not intended for use in humid environments or outdoors.