Multiple protection measures inverter

Photovoltaic power generation system includes components , brackets, combiner boxes , distribution cabinets , inverters , cables and other accessories, which can only inverter has brains "CPU", with active detection and prevention capabilities , when the grid fails or component failure inverter current sensor and voltage sampled by the brain "CPU" to make judgments , indicating that "executing agency" contactor or breaker opens to protect the personal safety of the grid , the equipment.

Inside the inverter AC contactor, DC circuit breakers , AC circuit breaker installed in different areas , functions are not the same , AC contactor bear boot routine shutdown action, generally first power down, AC contactor before action. DC circuit breaker main role is to disconnect between the modules and inverters , when the component or DC cables short circuit, grounding ; inverter bus capacitors , IGBT short circuit occurs , it must be removed from the DC switch.

From a security perspective , the inverterinput DC switch and AC switches are used in molded case circuit breakers , circuit breakers with automatic over-current and short circuit protection, short-circuit fault occurs in the inverter , the solar cells enable timely positive and negative separately , cut off the power grid and inverters contact .

Now some of the inverter in order to reduce costs , using a load switch plus fuse breaker alternative way , to the grid and solar components brought great risks.

Because the short circuit of solar modules is about 1.06 times the rated current , but at least the current fuse is blown more than 1.2 times the rated current , so when a short circuit fault dc ac converter , DC fuse would not have blown, solar modules short circuit . If not promptly treated, fire may occur.

50KW to 630KW crystal Fuyuan company plants inverter , input and output are used with a shunt release high-quality molded case circuit breakers, power plant safety is your patron saint .