- Overview
- Product Description
- Main Technical Parameter
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Basic Info.
Model NO.
CJMM3-400
Poles Number
3p+N
Type
Circuit Breaker
Certification
ISO9001-2000, CE
Standards
IEC60947-2
Overcurrent Release Type
Electronic Type
Number of Poles
3p/4p
Rated Operating Voltage
AC400V
Transport Package
Normal Package
Specification
125, 250, 400
Trademark
C&J and OEM
Origin
Wenzhou
HS Code
85362000
Production Capacity
100000/Month
Product Description
Structural Characteristics
·CJMM3 Moulded case circuit breaker (hereinafter referred to as circuit breaker) has the characteristics of small size, high breaking capacity, short arcing, and anti-vibration. It is suitable for power distribution networks with AC 50Hz, rated operating voltage 400V, and rated operating current up to 250A and below. It is used to distribute electric energy and protect lines and power equipment from overload, short circuit and other faults. It can also be used for infrequent switching in circuits and infrequent starting of motors. The circuit breaker can be installed vertically (that is, vertical installation) or horizontally (that is, horizontally installed).
·This product complies with IEC60947-2 and GB/T14048.2 "Low-voltage switchgear and control equipment Part 2: Circuit breakers".
Working And Installation Conditions
·The altitude of the installation site does not exceed 2000m.
·Ambient air temperature;
The upper limit of ambient air temperature does not exceed +40°C;
The 24-hour average ambient air temperature does not exceed +35°C;
The lower limit of ambient air temperature is not lower than -5°C;
·Atmospheric conditions:
·The relative humidity of the atmosphere does not exceed 50% when the ambient maximum temperature is +40°C. It can have higher relative humidity at lower temperatures. When the monthly average minimum temperature of the wettest month does not exceed +25°C, the relative humidity of the atmosphere does not exceed +25°C. The average maximum relative humidity is 90%, taking into account condensation on the product surface due to temperature changes.
·Pollution level: 3
Product Category
·According to the breaking capacity of the circuit breaker, it is divided into: a standard type (S type); b higher type (H type);
·According to the wiring method of the circuit breaker: a. Wiring in front of the board; b. Wiring behind the board; c. Plug-in type; d. Pull-out type;
·According to the operation mode: a. Direct operation by handle; b. Operation by turning handle; c. Electric operation;
·According to the number of poles: two poles; three poles; four poles;
·According to accessories: alarm contacts, auxiliary contacts, shunt release, undervoltage release;
Circuit breaker rating
| Model | Frame rating rated current In(mA) | Rated current In(A) | Rated working voltage (V) | Rated Insulation voltage (V) | Rated ultimate short circuit breaking capacity Icu(kA) | Rated operating short-circuit breaking capacity Ics(kA) | Number of poles | Flashover distance (mm) |
| CJMM3-125S | 125 | 16,20,25,32, 40,50,60,80, 100,125 | 400/415 | 1000 | 25 | 18 | 3P | ≤50 |
| CJMM3-125H | 125 | 35 | 25 | 3P | ||||
| CJMM3-250S | 250 | 100,125,160, 180,200,225, 250 | 400/690 | 800 | 35/10 | 25/5 | 2P,3P,4P | ≤50 |
| CJMM3-250S | 250 | 600 | 50 | 35 |
Inverse time breaking action characteristics of overcurrent release of distribution circuit breaker when all poles are
energized at the same time
| Test current name | I/In | Appointed time | Starting state |
| Agreed no tripping current | 1.05 | 2h(In>63A),1h(In≤63A) | Cold state |
| Agreed tripping current | 1.3 | 2h(In>63A),1h(In≤63A) | Immediately after the sequence 1 test, start |
Inverse time breaking action characteristics of overcurrent release of circuit breaker for motor protection when all
poles are energized at the same time
| Setting current | Appointed time | Starting state | Remark |
| 1.0In | >2h | Cold state | |
| 1.2In | ≤2h | Immediately after the sequence 1 test, start | |
| 1.5In | ≤4min | cold state | 10 ≤ In ≤ 250 |
| ≤8min | cold state | 250 ≤ In ≤ 630 | |
| 7.2In | 4s≤T≤10s | cold state | 10 ≤ In ≤ 250 |
| 6s≤T≤20s | cold state | 250 ≤ In ≤ 800 |
The instantaneous operating characteristics of the circuit breaker for distribution are set to 10In±20%, and the instantaneous operating characteristics of the circuit breaker for motor protection are set to 12In±20%.
