Smart circuit breaker

Short Description:



The M8LC series residual current operated circuit breaker(hereinafter referred to

as circuit breaker) is mainly suitable for distribution networks with frequency of AC

50Hz and rated working voltage of AC 400V.Used in three-phase four-wire power

supply and consumption system with neutral point directly grounded, it has functions

such as overload, short circuit, phase loss, overvoltage, undervoltage, residual

current action protection, etc. It can protect circuit and electrical equipment from

damage, and also provide protection for possible grounding fault and indirect

personal contact in circuit.

The product complies with GB/T14048.2,GB/T14048.4,GB/T32902 and GB/T22387


Product Detail

Product Tags


Simple and effective

Multiple functions 

It has protection functions such as residual current, overcurrent, short circuit, etc,

as well as practical functions such as automatic reclosing, residual current display, real

time load current display, action status indication and trip data display. The product also

has functions such as pluggable lightning protection module, four remote functions and

special adapter.

The combination of electric operating mechanism and air circuit breaker has been transformed into an integrated type, with reduced installation location and simplified wiring. The operation method with configurable function characteristic can set the required functions such as action current, breaking time and main circuit current according to the actual situation.

Communicability (when this function is required during ordering)


The communication type leakage circuit breaker can record and query detailed

data such as the phase sequence that causes the trip, cause and trip time, and has the

function of historical data recording; the communication series product adopts RS-485

communication port and have multiple communication protocols to choose from. It can

establish communication function with intelligent distribution transformer terminal, upper

computer, etc., and achieve remote parameter adjustment, information query and fault

parameter download.

3.Working environment and installation condition

The ambient air temperature shall not exceed +40℃, and the average temperature

value within 24 hours shall not exceed +35℃. The lower limit of the ambient air

temperature is -20℃; Note: For working condition where the ambient air temperature

is above +35℃ or below -20℃, the user should consult with the manufacturer.

The altitude of the installation site shall not exceed 2000m;

The maximum temperature is +40℃, and the relative humidity of the air does not

exceed 50%. At lower temperature, there can be higher relative humidity. Special

measures should be taken for occasional condensation caused by temperature


In a place without rain or snow erosion;

The pollution level is 3;

The maximum inclination of circuit breaker installation is ±5°;

Installation category: The installation category of the main circuit of the circuit breaker

is III, and the installation category of the auxiliary circuit and control circuit is II.

The external magnetic field of the installation site shall not exceed 5 times the

geomagnetic field in any direction.

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