1. Circuit breaker refers to a switchgear that can turn on, carry and turn off the current under normal circuit conditions and turn on, carry and turn off the current under abnormal circuit conditions within a regular time.
According to the voltage of Delixi circuit breaker, there are high-voltage circuit breakers and low-voltage circuit breakers. Circuit breakers below 1kV are called low-voltage circuit breakers, which are commonly known as "empty opening". Circuit breakers from 1kV to 35kV are generally called medium voltage circuit breakers; Circuit breakers from 66 to 220kV are generally called high-voltage circuit breakers.
2. Open air is a general term for low-voltage circuit breakers, also known as air switches.
3. The low-voltage circuit breaker integrates action and maintenance, and the miniature low-voltage circuit breaker has long-delay over-current maintenance and quick-break maintenance; Molded case circuit breakers generally have long-delay overcurrent maintenance and quick-break maintenance, and when an electronic tripper is added, there will be short-delay and grounding maintenance. Structural circuit breakers are also called all-round circuit breakers. In addition to the above maintenance functions, maintenance tuning, display and communication functions are also added. For motors with small capacities and no control requirements (e.g. exhaust fans...), they can be controlled directly by the circuit breaker.
4. The difference between circuit breakers and open circuit breakers. Circuit breaker refers to circuit breaker equipment from low voltage to high voltage and even ultra-high voltage, while open circuit breaker generally refers to low voltage circuit breaker, and more refers to miniature circuit breaker.
5. The actuator of medium voltage and high voltage circuit breaker is only divided and closed, and its maintenance is completed by maintenance relay or comprehensive maintainer. The circuit breaker closes or disconnects through the closing and disconnecting coils of the secondary line.
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Fuses are mainly used for short-circuit maintenance.
When the fuse is used for blocking purposes, the fuse must be installed.
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