BMS Series (16A-2000A) Moulded case circuit breaker
BMS series circuit breaker is Mingri’s expert team after more than five years of research and development, in 2018 Completed the introduction of a new generation of circuit breakers, with new appearance, utility model, invention and other patents.The circuit breaker has Class current of eight shell frames: 100, 160, 250, 400, 630, 800, 1250, 2000;Rated current 16a-2000a;Applicable to ac 50Hz and 60Hz;Rated insulation voltage is 800V;BMS series circuit breakers have isolation function, Add shunt tripper, undervoltage tripper, auxiliary contact, internal accessories of alarm contact head and electric operating mechanism,Rotate handle operating mechanism.
BMS series circuit breakers have the characteristics of small size, high break, modularization, bottom line and horizontal mounting capacity reduction, isolation, and other features, and accessories are complete, wide range of application, with a variety of protection and current limit breaking function, safe and reliable use Rotate handle operating mechanism.
The short circuit setting current Ii of BMS series circuit breakers is 5In ~ 12In.When setting current Ii 50A, short circuit setting current is 500A 20%, except bms-160cy.The general circuit breaker produced by our company is 10In, and the circuit breaker protected by the motor is 12In. If the customer chooses other multiple short-circuit setting current, please indicate it in the order list.
● Model definition and labeling
GB/T 14048.1(IEC 60947-1) low-voltage switchgear and controlgear - part 1: general provisions
GB/T 14048.2(IEC 60947-2) low-voltage switchgear and controlgear - part 2: circuit breakers
GB/T 14048.4(IEC 60947-4) low-voltage switchgear and controlgear - part 4-1: electromechanical contactors and motor starters (including motor protectors)
● Work envirement
The elevation of the installation site generally does not exceed 2000 meters;
Temperature does not exceed + 40 ℃ , the lower limit of not less than 25 ℃ , and the average temperature is not more than 24 h + 35 ℃ ;
Air temperature + 40 ℃ , relative humidity shall not exceed 50%, under the low temperature can be allowed to have a higher relative humidity; Circuit breakers should be installed where there is no rain or snow;
The circuit breaker shall be installed in a place free from rain and snow. The circuit breaker shall be installed in a medium free from explosion danger, and the medium shall be installed in a place free from gas and dust sufficient to corrode the metal and insulating shell;
The main circuit and undervoltage trip of the circuit breaker shall be installed in class III, with the rest of the auxiliary current and control circuit in class II.
● Dimensions of BMS-100, BMS-225 2P case circuit breaker
● External dimensions of BMS series (3P)
● B External dimensions of BMS series (4P)
● Characteristics and rated current of neutral pole (N) of a quadrupole circuit breaker
The neutral pole (N) of the quadrupole circuit breaker is on the right side of the circuit breaker and can be divided into the following four forms;
Type A: N shall not be equipped with over-current tripping element, and the N pole shall always be connected, and shall not be combined with other three pole;
Type B: N shall not install over-current tripping element, and N shall be combined and separated with other three poles;
Type C: the over-current tripping element is installed at the N pole, and the N is combined and separated with other three poles;
Type D: the over-current tripping element is installed at the n-pole, and the n-pole is always connected, and is not separated with the other three poles;
Note: the four-pole circuit breaker manufactured by our company defaults to type B unless otherwise specified by the user.
The rated current of N pole with overload trip is shown in table 1 below.
Table 1 N pole has rated current for overload detaching device
BMS 2P Parameter list