BFMM1E series electronic plastic case circuit breaker (hereinafter referred to as circuit breaker）is applicable to AC 50Hz(or 60Hz), and its rated insulation voltage is 800V. rated working voltage 690V and below, and rated working current up to 800A are used for infrequent conversion and infrequent motor starting.Circuit breaker it has the functions of overload long delay inverse time limit. short circuit short delay inverse time limit, short circuit short delay definite time limit. Short circuit instantaneous and under voltage protection and residual current protection (optional), phase failure protection function (optional).which can protect the line and power supply equipment from damage. The protection characteristics of the circuit breaker are complete and accurate, and can improve the power supply Reliability to avoid unnecessary power failure. Circuit breaker is divided into M type (relatively high score breaking type), H type (high score breaking type) according to its rated limit short score breaking ability.The circuit breaker has a volume of the Small, high separation ability, short flying arc,anti-vibration and other characteristics.The circuit breaker can be mounted vertically (i.e.vertically) or horizontally (i. e. horizontally). The circuit breaker has isolation function, and its corresponding symbols:” The circuit breaker shall not be reversed, that is, only 1,3 and 5 power lines and 2.4 and 6 load lines are allowed.

Model And Meaning

Note:

• according to the rated limit short-circuit breaking capacity, it is divided into S type (high breaking type) and H type (high breaking type);
• handle direct operation without code: electric operation is represented by p; Handle rotation is represented by Z;
• the basic type has no code, the intelligent communication type is represented by Z, the programming communication type is represented by B, the fire type is represented by X, and the liquid crystal display is represented by L.

Normal Operating Conditions

• altitude:<2000m;
• ambient temperature:- 5 C~ + 40 ℃;
• be able to withstand the influence of humid air;
• be able to withstand the influence of salt mist and oil mist;
• the installation category of the main circuit of the circuit breaker is Ill, and the installation category of other auxiliary circuits and control circuits is Il;
• when the maximum temperature is + 40 C, the relative humidity of the air shall not exceed 50%.Higher relative humidity can be allowed under lower humidity. Special measures shall be taken for the occasional condensation due to temperature change;
• the maximum inclination is 22.5 ° ;
• in the medium without explosion hazard, and there is no place where the medium has enough gas and conductive dust to corrode metal and damage insulation;
• where there is no rain or snow.

Structural Features

• it has the characteristics of small volume, high breaking capacity, short arcing and anti vibration:
• the same overall dimension and installation dimension as bfmm1:
• the circuit breaker has isolation function, and its rated insulation voltage is 8oov:
• according to the rated limit short-circuit breaking capacity, it is divided into two types: S-type (high breaking type) and H-type (high breaking type):
• it has overload long time delay inverse time limit, short-circuit short time delay fixed time limit, short-circuit instantaneous and undervoltage protection functions, residual curent protection (optional) and phase loss protection function (optional), which can protect the power supply of the line The power supply is not damaged:
• complete and accurate protection characteristics can improve the reliability of power supply.

The Circuit Breaker Meets The Standard

• IEC 60947-1 and GB/t14048 1 General rules for low voltage switchgear and controlgear
• IEC 60947-2 and GB/t14048 2 low voltage circuit breakers for low voltage switchgear and control equipment and Appendix F additional requirements for circuit breakers with electronic overcurrent protection
• IEC 60947-5.1 and GB /t14048 5 low voltage switchgear and controlgear control circuit appliances and switching elements

Optional Features

• with temperature monitoring and protection function: when the ambient temperature exceeds the set value (the default setting is 85 C), the controller will output alarm photoelectric signal or open the circuit breaker:
• dual passive signal output function: for signal (or alarm), capacity ac230v5a:
• it has overload thermal memory function: overload thermal memory function, short circuit (short time delay) thermal memory function:
• it has fire protection shunt excitation function: overload alarm does not trip (a pair of passive contacts are provided) and shunt excitation tripping function is provided;
• communication function: standard RS232, RS485, MODBUS fieldbus protocol:
• it can be connected to a hand-held programmer: set various protection parameters of the circuit breaker, conduct nearly 10 fault inquiries and various status displays;
• it can be connected with intelligent control mode conversion: optical isolation contact signal output, including programmable do output function:
• high grade with LCD module

Main Functions And Features

Intelligent controller is the core component of molded case circuit breaker. It is applied to motor protection or power distribution protection torealize the functions of measurement, protection, control and communication, so as to protect the line and power supply equipment from damage Overload, short circuit, grounding and other fault hazards. mcu microprocessor controller is adopted, with stable and reliable performance: the intelligent controller can supply power by itself. As long as it is connected, when the current is not less than 20% of its rated value, it can ensure the normal protection function Work; selective cordination has three-stage protection: the circuit breaker of class B and other short-circuit protection devices connected in the same circuit have selective coordination under short-circuit conditions: overload, long delay and reverse time seting of limit, short-circuit delay (inverse time limit, definite time limit), short-circuit instantaneous and other protection function parameters; it has three protection parameter settings of action current and action time, and can be adjusted in 4-10 gears: the user can set and adjust the controler according to the requirements of load current, or select off according to the user’s requirements cut off corresponding functions (customized functions, which need to be noted when ordering); large curent instantaneous tripping function: when the circuit breaker is closed and running, in case of short circuit and large current (> 201nm), the magnetic tripping mechanism of the circuit breaker can trip directly, and the dual protection is more reliable and safe; With tripping test (test) function: input DC 12V voltage to test the action characteristics of the circuit breaker; Fault self diagnosis function: protect and detect the working state and operation of the inteigent controller; With pre alarm indication and overload indication: when the load curent reaches or exceeds the over set value, it is equivalent to the light guide column to lead out the light source; Double air gap technology of magnetic flux exchanger: more reliable and stable operation, no misoperation, reliable tripping and smal power; High protection accuracy: the action time accuracy of overload protection and short-circuit short delay protection is ± 10%; The accuracy of short-circuit instantaneous protection action value ± 15% depends on the action telephone; The installation has interchangeability, and the overall dimension and installation dimension are the same as those of zymm1 Series Molded Case circuit breakers. Note: bfmm1e-630 is the same as bfmm1e-40o, which is based on bfmm1e intelligent communication type or programmed communication type.

Detailed Explanation Of Functions

Communication function: through the communication protocol conversion card, the number of PROFIBUS-DP protocol networks can be easily accessed for setting, last fault query, function editing, do function output spinning process, etc. according to the user set the function or upgrade other functions according to the customized scheme Overload thermal memory function: the overload thermal memory function of the controller can be selected by the user. It is turned off by default when leaving the factory. The overload thermal memory energy of the controller is fully released within 30 minutes. Short circuit thermal memory function: the controller (short time delay) short circuit current protection thermal memory function can be selected by the user. It is off by default when leaving the factory: the controller (short time delay) short circuit current protection thermal memory energy Fully release within 15 minutes. Fault recording function: the controller can record the fault type, fault tripping time, fault phase and maximum fault current of the last 10 times without loss of power. Fire protection shunt function: it is used by the fire protection system. When the tripping condition is reached under the set parameters, the circuit breaker does not trip and outputs normally closed contact, and provides shunt function, which can be selected by the user whether to open or not Open the circuit breaker. The programmable do output function controller has four photoelectric signal outputs. The photoelectric signals of do1 and Do2 can be programmed into the following function outputs, D03 is the opening signal and D04 is the closing signal.

Application And Networking Of Communication Interface And External Module Of Intelligent Circuit Breaker

BFMM1E communication intelligent molded case circuit breaker is equipped with communication interface according to Modbus communication interface protocol. BFMM1E communicable intelligent molded case circuit breaker is not used for networking communication, but when used alone, the handheld programmer can set the protection characteristics of the circuit breaker through the communication interface; it can also connect the LCD module to the communication interface to monitor the operating curent and fault information of the circuit breaker. When BFMM1E intelligent molded case circuit breaker is used for networking communication, it can be directly connected to the corresponding fieldbus; For Fieldbus with different protocols, cm-dp protocol conversion module can be selected to convert Modbus protocol and connect it to corresponding fieldbus. When the BFMM1E-type communication intelligent plastic shellcircuit brelaker sets the protection parameters of the circuit breaker alone, the professionals should connect with the Fl handheld programmer according to the figure below, and then follow the operation instructions of the handheld programmer BFMM1E communication intelligent molded case circuit breaker is used together with LCD module. During normal operation, the display module can monitor the operating current and fault information of the circuit breaker. When seting the protection parameters of circuit breaker, professionals need to use LK handheld programmer to connect, and then operate according to the operation instructions of handheld programmer. The communication network of BFMM1E communication intelligent molded case circuit breaker can be connected by referring to the scheme in the figure below. Different protocol modules can be selected for different protocols to convert MODBUS into PROFIBUS-DP and other protocols.