The Difference and Connection Between Current Limiting Circuit Breakers and Ordinary Circuit Breakers
Difference:
Working Principle:
● Current Limiting Circuit Breaker: Designed to limit the peak value of short-circuit current by swiftly breaking the circuit when a short circuit occurs. This type of circuit breaker can interrupt the circuit rapidly before the short-circuit current reaches its peak, thereby preventing damage to electrical equipment and reducing fire risks.
● Ordinary Circuit Breaker: Mainly used to automatically disconnect the power supply in cases of overload, short circuit, or other faults to safeguard electrical equipment. Its breaking speed may not be as rapid as that of current-limiting circuit breakers.
Breaking Capacity:
● Current Limiting Circuit Breaker: Due to its specialized design, it can break the circuit in 8.3 milliseconds or less, resulting in higher breaking capacity.
● Ordinary Circuit Breaker: Typically has a slightly longer breaking time and lower breaking capacity.
Protection Characteristics:
● Current Limiting Circuit Breaker: Capable of limiting the peak value of short-circuit current, thereby reducing the risk of electrical equipment damage. Particularly suitable for branch circuits requiring high breaking capacities.
● Ordinary Circuit Breakers: Primarily used for overload and short-circuit protection, with less capability to control short-circuit currents.
Applications:
● Current Limiting Circuit Breaker: Often used in low-voltage networks, substation systems, and applications where limiting short-circuit current peaks is crucial due to its high breaking capacity and current limiting characteristics.
● Ordinary Circuit Breakers: Widely employed in various circuit protection scenarios including residential, industrial, and commercial settings.
Connection:
● Similar Functions: Both are switching devices used for circuit disconnection and electrical equipment protection.
● Similar Structures: Both types include fundamental components such as contact systems, arc extinguishing systems, operating mechanisms, and releases.
● Interchangeability: In some situations, current limiting circuit breakers can replace ordinary circuit breakers, but this choice depends on specific application requirements and conditions.
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