DPX3 circuit breaker 250 HP 3P 63 A 36 kA 423006

Three-pole circuit breaker DPX3 250 HP – Reliable protection for electrical installations

The DPX3 250 HP is a robust and high-performance device designed to protect electrical circuits against overload and short-circuit conditions. Engineered for use in both building and industrial installations, it ensures safety and uninterrupted power supply. It features a high short-circuit breaking capacity of up to 36 kA at 400 V, guaranteeing rapid and effective response during fault conditions.

Construction and Application

The DPX3 breaker is a three-pole (3P) device with a rated continuous current of 63 A. Its construction, based on HP (High Performance) technology, ensures reliability and long service life. The ability to mount additional auxiliary contacts (2 included in the set) expands the breaker’s functionality, enabling integration with control and signaling systems. This breaker is suitable for protecting diverse circuits, including lighting, power sockets, and high-power electrical equipment.

Key Features and Benefits

• High short-circuit breaking capacity: 36 kA at 400 V ensures fast and effective response during short-circuit events, minimizing the risk of damage to the installation and connected devices.
• Wide rated voltage range: From 230 V to 690 V allows universal application across various electrical networks.
• Adjustable overload current setting: Setting range from 50 A to 63 A enables precise tuning of the breaker’s characteristics to match the specific load profile.
• Robust construction: Fixed mounting ensures stability and durability of connections.
• Trip indicator: Provides immediate visual indication of breaker operation, simplifying fault localization.
• Expandability: Option to mount a motorized drive enhances operational comfort in hard-to-reach locations.
• Safety: Lack of integrated earth-fault protection allows seamless integration with external RCDs (residual current devices), ensuring comprehensive protection for people and property.
• Easy installation: Connection via bolted terminals ensures quick and secure wiring.

Technical Parameters in Practice

The rated continuous current of 63 A means the breaker is designed to operate reliably under continuous loads of this magnitude without risk of overheating or damage. The adjustable overload trip setting range (50–63 A) allows precise calibration of sensitivity to load characteristics—the lower the setting, the faster the response to overload. The short-circuit trip setting range (315–630 A) determines the current level at which the short-circuit protection activates. The IP30 protection rating indicates resistance to contact and ingress of tools, making it suitable for industrial or workshop environments.