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Motor vehicle signals and non-motor vehicle signals Motor vehicle signal is a set of three lights consisting of red, yellow and green circular units without patterns to guide the passage of motor vehicles.

2023

Main characteristics of circuit breakers

The characteristics of the circuit breaker are mainly: rated voltage Ue; rated current In; overload protection (Ir or Irth) and short-circuit protection (Im) decoupling current adjustment range; rated short-circuit breaking current (industrial circuit breaker Icu; household circuit breaker Icn), etc.

2023

Overview of circuit breakers

Circuit breaker is a switching device that can close, carry and open the current under normal circuit conditions and can close, carry and open the current under abnormal circuit conditions within a specified period of time.

2023

The scientific basis of the light color of the traffic signal

In the earliest days, there were only two colors, red and green, and later, after improvement, a yellow light was added. Red light means stop, yellow light means ready, and green light means pass. The reason why these three colors were adopted and used as traffic signals is also related to people's visual structure and psychological response.

2023

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