Projoy News

Advantages of PROJOY Firefighter Safety Switch


Rooftop distributed photovoltaic has been used extensively in China, the United States, Australia, Europe and Japan. As the application closest to the human activity area, how to ensure personal safety, how to prevent the fire risk of photovoltaic facilities, how to ensure that non-professional pers...[Learn More]

​The development of rapid shutdown


With the popularity of photovoltaic plants, more and more emergency crew and firefighters of photovoltaic plants are aware of the potential safety hazards of photovoltaic systems. Generally, after a fault occurs in an AC circuit, there is sufficient protection equipment to cut off the fault point fr...[Learn More]

How to select a suitable DC MCB?


What is Miniature Circuit Breaker?A miniature circuit breaker (MCB) is a switch device which closes, carries and breaks the circuit. It could open the circuit when the circuit current beyond a limited value. Usually, an MCB could be replaced by an isolator with a fuse.Figure 1 MCB internal structure...[Learn More]

The features of PROJOY Non-polarity DC MCB


The traditional DC MCB is polarity(The current enters from the upper end "+" and flows out from the "-" on the lower end). Low cost and wide range of uses. But it only protect the circuit in one direction, once the electrical current enters from the opposite direction, can’t effectively break the ci...[Learn More]