A hydraulic-magnetic circuit breaker differs from a thermal-magnetic circuit breaker in several key ways:
Operating Principle
A hydraulic-magnetic circuit breakers use a combination of magnetic force and hydraulic damping to detect overcurrent, while thermal-magnetic circuit breakers use both a bimetallic strip (thermal) and an electromagnet (magnetic) to detect faults.
Temperature Sensitivity
Hydraulic-magnetic breakers are unaffected by ambient temperature changes, providing consistent performance regardless of the surrounding environment. In contrast, thermal-magnetic breakers can be influenced by temperature variations, which can affect their tripping characteristics.
Response Time
Hydraulic-magnetic breakers offer precise and reliable protection with adjustable time delays, making them suitable for applications with varying load conditions. Thermal-magnetic breakers provide both instantaneous and time-delayed protection, with the thermal component introducing a delay based on heat buildup.
Resetting
Both types can be reset after tripping, but hydraulic magnetic breakers can be re-closed immediately without needing a cooling-down period.
