Circuit-breaker
A switch device that is capable of closing, carrying and breaking the current under normal circuit conditions and specified abnormal circuit conditions.
Electricity meter external circuit-breaker:
The external micro circuit-breaker of electricity meters is a key component to use with smart electricity meters to achieve smart control functions; it is divided into two major categories semi-automatic and fully automatic:
Semi-automatic: micro circuit-breaker with shunt trip function. Only capable of realizing automatic electricity disconnection after late on bills. Once the bill is paid, professional personnel is required to switch it on manually.
Fully automatic: Equipped with arc extinguishing and remote automatic split and close functions; supports overload protection, short-circuit protection and electricity leakage protections, etc.
Electricity meter external circuit-breaker specifications
State grid 《Technical specification of external circuit-breaker for electricity meters》
China Southern Power Grid 《Charge control electricity meters external low voltage circuit-breaker technical specifications》