CJ:Enterprise code M:Moulded case circuit breaker 1:Design No □:Rated current of frame □:Breaking capacity characteristic code/S denotes standard type (S can be omitted)H denotes higher type
Note: There are four types of neutral pole (N pole) for four phases product.The neutral pole of type A is not equipped with over-current tripping element, its always switched on, and it is not switched on or off together with other three poles. The neutral pole of type B is not equipped with over-current tripping element, and it’s switched on or off together with other three poles(the neutral pole is switched on before being switched off)The neutral pole of type C is equipped with over-current tripping element, and it’s switched on or off together with other three poles(the neutral pole is switched on before being switched off) The neutral pole of type D is equipped with over-current tripping element, it’s always switched on and is not switched on or off together with other three poles.
| Accessory name | Electronic release | Compound release | ||||||
| Auxiliary contact,under voltage release,alam contact | 287 | 378 | ||||||
| Two auxiliary contact sets,alarm contact | 268 | 368 | ||||||
| Shunt release, alarm contact, auxiliary contact | 238 | 348 | ||||||
| Under voltage release,alarm contact | 248 | 338 | ||||||
| Auxiliary contact alarm contact | 228 | 328 | ||||||
| Shunt release alarm contact | 218 | 318 | ||||||
| Auxiliary contact under-voltage release | 270 | 370 | ||||||
| Two auxiliary contact sets | 260 | 360 | ||||||
| Shunt release under-voltage release | 250 | 350 | ||||||
| Shunt release auxiliary contact | 240 | 340 | ||||||
| Under-voltage release | 230 | 330 | ||||||
| Auxiliary contact | 220 | 320 | ||||||
| Shunt release | 210 | 310 | ||||||
| Alarm contact | 208 | 308 | ||||||
| No accessory | 200 | 300 | ||||||
| 1 Rated value of circuit breakers | ||||||||
| Model | Imax (A) | Specifications (A) | Rated Operation Voltage(V) | Rated Insulation Voltage(V) | Icu (kA) | Ics (kA) | Number of Poles (P) | Arcing Distance (mm) |
| CJMM1-63S | 63 | 6,10,16,20 25,32,40, 50,63 | 400 | 500 | 10* | 5* | 3 | ≤50 |
| CJMM1-63H | 63 | 400 | 500 | 15* | 10* | 3,4 | ||
| CJMM1-100S | 100 | 16,20,25,32 40,50,63, 80,100 | 690 | 800 | 35/10 | 22/5 | 3 | ≤50 |
| CJMM1-100H | 100 | 400 | 800 | 50 | 35 | 2,3,4 | ||
| CJMM1-225S | 225 | 100,125, 160,180, 200,225 | 690 | 800 | 35/10 | 25/5 | 3 | ≤50 |
| CJMM1-225H | 225 | 400 | 800 | 50 | 35 | 2,3,4 | ||
| CJMM1-400S | 400 | 225,250, 315,350, 400 | 690 | 800 | 50/15 | 35/8 | 3,4 | ≤100 |
| CJMM1-400H | 400 | 400 | 800 | 65 | 35 | 3 | ||
| CJMM1-630S | 630 | 400,500, 630 | 690 | 800 | 50/15 | 35/8 | 3,4 | ≤100 |
| CJMM1-630H | 630 | 400 | 800 | 65 | 45 | 3 | ||
| Note: When the test parameters for the 400V, 6A without heating release | ||||||||
Molded case circuit breakers are electrical protection devices that are designed to protect the electrical circuit from excessive current. This excessive current can be caused due to an overload or short circuit. The molded case circuit breakers can be used in a wide range of voltages and frequencies with a defined lower and upper limit of adjustable trip settings. In addition to tripping mechanisms, MCCBs can also be used as manual disconnection switches in case of emergency or maintenance operations. MCCBs are standardized and tested for overcurrent, voltage surge, and fault protection to ensure safe operation in all environments and applications. They work effectively as a reset switch for an electric circuit to disconnect power and minimize damage caused by a circuit overload, ground fault, short circuits, or when current exceeds the current limiting.
An MCCB or fuse is an electrical component commonly used in industry to protect electronic equipment and systems. In daily life, MCCB is widely used. Some common MCCB applications are described below. 1.Energy distribution: MCCB can help installers distribute grid loads to different electrical equipment. Through MCCB, users can more safely control the distribution of power and the current of each device. 2.Short circuit protection: The main function of the MCCB is to automatically cut off the circuit when a short circuit occurs. This avoids equipment damage, release of dangerous substances such as fire. 3.Overload protection: Similar to short circuit protection, MCCB can also protect equipment from being overloaded. This can be achieved by setting circuit breakers to avoid electrical damage caused by overloading the equipment. 4.Generator protection: MCCB is widely used in the detection and protection of large generators. It can monitor the normal operation of the generator, detect problems and activate the circuit breaker protection system. 5.Power transformer protection: MCCB can prevent the transformer from overloading and monitor the transformer’s over-temperature at the same time. 6.Movable cylinder protection: MCCB is widely used in concrete, cement and mineral crushers. It detects short circuits and overloads of equipment, thereby protecting equipment from damage.
