CJMM1-125-K 3p 1000V 100A DIN Rail MCCB Moulded Case Circuit Breaker with Key

Application CJMM1 series moulded case circuit breaker(hereinafter referred to as circuit breaker) is pplicable for AC 50/60HZ power distribution network circuit with rated insulation voltage of 800V, rated operation voltage of 690V and rated operation current from 10A to 630A, it's used to distribute power and prevent circuit and power supply equipment from damage due to overload, short circuit, under voltage and other faults, it's also used for infrequent start of motor as well as overload, short circuit and under voltage protection.This circuit breaker owns advantages of small volume, high breaking capacity, short arcing (or noarcing)etc, it can be equipped with accessories like alarm contact, shunt release, auxiliary contact etc, it's an ideal product for user. The residual current circuit breaker can either be vertically installed (vertical installation) or be horizontally installed (horizontal installation) The product is in accordance with the standards of IEC60947-2 and Gb140482
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Products Details

Product Model

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.

Table 1

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

Classification

  • By breaking capacity: a standard type(type S) b higher breaking capacity type(type H)
  • By connection mode: a front board connection, b back board connection, c plugin type
  • By operation mode: a direct handle operation, b rotation handle operation,c electrical operation
  • By number of poles: 1P, 2P, 3P, 4P
  • By accessory: alarm contact, auxiliary contact, shunt release, under voltage release
 

Normal Service Condition

  • The altitude of the installation site shall not exceed 2000m
  • Ambient air temperature
  • The ambient air temperature shall not exceed +40℃
  • The average value shall not exceed +35℃ with in 24 hours
  • The ambient air temperature shall not be less than -5℃
  • Atmosphere condition:
  • 1There lative humidity of atmosp here shall not exceed 50% at highest temperature of +40℃,and it can be higher atalower temperature,when theaver agelowest temperature in the wettest month doesn't exceed 25℃ can be 90%,conden sationon product surfacedue to temperature change must be takenin to account.
  • The pollution level is class 3

Main Technical Parameter

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
 
2 Inverse time breaking operation characteristic when each pole of overcurrent release for power distribution is powered on at the same time
Item of test Current (I/In) Test time area Initial state
Non-tripping current 1.05In 2h(n>63A),1h(n<63A) Cold state
Tripping current 1.3In 2h(n>63A),1h(n<63A) Proceed immediately after No.1 test
 
3 Inverse time breaking operation characteristic when each pole of over- current release for motor protection is powered on at the same time.
Setting Current Conventional time Initial State Note
1.0In >2h Cold State
1.2In ≤2h Proceeded immediately after the No.1 test
1.5In ≤4min Cold State 10≤In≤225
≤8min Cold State 225≤In≤630
7.2In 4s≤T≤10s Cold State 10≤In≤225
6s≤T≤20s Cold State 225≤In≤630
 
4 The instantaneous operation characteristic of circuit breaker for power distribution shall be set as 10in+20%, and the one of circuit breaker for motor protection shall be set as12ln±20%
 

What is MCCB?

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.  

MCCB Application

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. In conclusion, MCCBs are widely used and play an important role in various electrical and mechanical fields. When selecting an MCCB, various specific factors need to be carefully considered in order to ensure the safety and reliability of the system, including current carrying capacity, efficiency, usable area, and other important parameters.

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