BY03L-63 RCBO 4.5KA Residual Current Circuit Breaker with Over-current Protection

Product Overview

• The BY03L-63 series 4.5kA RCBO (Residual Current Circuit Breaker with Over-current Protection) is a high-performance device designed for comprehensive protection of electrical systems. With a rated current of up to 63A and configurations including 1P+N, 2P, 3P+N, and 4P, it is suitable for both single-phase (240V) and three-phase (400V) systems operating at a frequency of 50Hz. This RCBO offers advanced protection against over-current, short circuit, and residual current (leakage), ensuring safety and reliability in residential, commercial, and light industrial applications.
• The device features a flame-retardant casing, enhancing safety by reducing fire risks and protecting internal components. A built-in indicator window allows for quick and clear status monitoring, simplifying maintenance and troubleshooting. To further enhance safety, the BY03L-63 is equipped with finger-protected connection terminals, preventing accidental contact with live parts during installation or servicing.
• An innovative feature of this RCBO is its ability to lock the residual current protection mechanism. In situations where power outages are not allowed or during maintenance, this functionality disables the leakage protection trip while retaining over-current and short-circuit protection. This ensures continuous operation in critical scenarios while maintaining system safety.
• The RCBO also includes a current-limiting contact system that minimizes the effects of short-circuit currents, reducing stress on the system and extending the breaker’s service life. Its compact and robust design ensures durability and easy integration into electrical panels, even in challenging environments.

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