AC Contactor CJ12 Series and CJ12Z Series - Reliable China Suppliers and Factory for AC Motors and Circuit Control
Type and meaning
Normal working conditions and installation conditions
Ambient Air Temperature
-5°C to +40°C, with the average temperature no higher than +35°C within 24 hours.
Altitude
Not higher than 2000m.
Atmospheric Conditions
At +40°C, relative humidity should not exceed 50%. Higher relative humidity is allowed at lower temperatures (e.g., 90% at 20°C). Special measures should be taken for occasional condensation due to temperature changes.
Pollution Level
Level 3.
Installation Category
Category II.
Installation Condition
The inclination between the installation surface and the vertical plane should not exceed ±5°.
Impact Vibration
The product should be installed and used in a place without obvious shaking, impact, and vibration.
Sucking Coil Specifications
AC 50Hz: 127V, 220V, 380V; DC: 110V, 220V.
Action Characteristics
Pull-in voltage: (85%-110%) Us; Release voltage: AC (20%~75%) Us, DC (10%~75%) Us.
Applicable Working Systems
8-hour working system; Intermittent periodic working system with a load factor of 40% (4-pole and 5-pole contactors are only applicable to this system); Short-time working system.
Main parameters and technical performance
| Model | Rated insulation and working voltage |
Conventional free air thermal current(A) |
Rated working current(A) | Mechanical endurance 104 times |
Electrical endurance (AC-2) 104 times |
Number of operating cycles/h |
Auxiliary contacts | Type of matched fuse |
||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AC-2 | AC-4 | Control capacity | Auxiliary contact Conventional free air thermal current(A) |
Number | ||||||||
| CJ12-100 | 380 | 100 | 100 | 100 | 300 | 15 | 600 | AC 380V 100VA DC 220V 90W |
10 | open | closed | RT16-250 |
| CJ12-150 | 380 | 150 | 150 | 150 | 300 | 15 | 600 | 2 | 4 | RT16-315 | ||
| CJ12-250 | 380 | 250 | 250 | 250 | 300 | 15 | 600 | 3 | 3 | RT16-400 | ||
| CJ12-400 | 380 | 400 | 400 | 400 | 100 | 10 | 300 | 4 | 2 | RT16-500 | ||
| CJ12-600 | 380 | 600 | 600 | 600 | 100 | 10 | 300 | 5 | 1 | RT16-630 | ||
Notes:
- 1. Mechanical endurance: no less than 1×106 times for two-pole products and no less than 1×106 times for four-pole and five-pole products;
- 2. Electrical endurance: separately agreed by the supplier and the buyer according to the indicators of electrical endurance of three-pole products for the use categories of AC-3 and AC-4 and of two-pole, four-pole and five-pole products for the use category of AC-2;
- 3. For CJ12Z series DC controlled AC contactor, the maximum current specification reaches 400A, and the product body has occupied a pair of normally closed auxiliary contacts.
Structural features of the product
CJ12 series AC contactor is of open type, with the plane layout of bars. With electromagnetic system in the right, main contact in the center, and auxiliary contact in the left, it is provided with the rotatable stop gear for easy monitoring and repair.
The magnetic system of the contactor consists of U-shaped moving and static iron cores and coil. Both moving and static iron cores are equipped with buffer devices, which prolongs the service life of the product.
For CJ12Z, the DC magnetic system is adopted.
The main contact system of the contactor adopts a single breakpoint rotating structure, and is equipped with clay arc extinguishing chamber with longitudinal slit, which has good arc extinguishing performance.
The auxiliary contact adopts bridge-type double breakpoints and is provided with the transparent protective cover. The number of normally open and normally closed contacts can be combined according to Table 1.
The vulnerable parts of the whole contactor are characterized by simple disassembly and easy maintenance.
Outline and installation dimensions
| Rated working current(A) |
Installation dimensions | C | Maximum outline dimensions | Safe area | Mounting Screw |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B | A (total width) | Total height | Total depth | |||||||||||
| Level II | Level III | Level IV | Level V | Level II | Level III | Level IV | Level V | L | M | |||||
| 100 | 274 | 330 | 386 | 442 | 316 | 372 | 430 | 486 | 194 | 195 | 80 | 50 | M10 | |
| 150 | 307 | 370 | 433 | 496 | 346 | 409 | 473 | 537 | 219 | 207 | 70 | 70 | M10 | |
| 250 | 335 | 405 | 475 | 545 | 374 | 445 | 516 | 586 | 255 | 230 | 70 | 80 | M10 | |
| 400 | 360 | 440 | 520 | 600 | 420 | 500 | 581 | 663 | 296 | 274 | 100 | 80 | M12 | |
| 600 | 404 | 500 | 596 | 692 | 469 | 566 | 664 | 760 | 349 | 334 | 120 | 150 | M16 | |
Frequently Asked Questions (FAQ)
What is the ambient temperature limit for operating CJ12 series AC contactors?
The normal ambient air temperature should be within the range of -5°C to +40°C. Additionally, the average temperature over a 24-hour period must not exceed +35°C.
Can the CJ12 series contactors be installed in environments with high humidity?
Yes, but with limitations. At the maximum temperature of +40°C, the relative humidity should not exceed 50%. Higher humidity is allowed at lower temperatures (for example, 90% at 20°C). Special precautions should be taken to prevent condensation caused by temperature fluctuations.
What is the difference between the CJ12 and the derived CJ12Z series?
The main difference lies in the magnetic system. While the standard CJ12 series uses an AC magnetic system, the derived CJ12Z series utilizes a DC magnetic system. Additionally, the CJ12Z series body pre-occupies a pair of normally closed auxiliary contacts for current specifications up to 400A.
Are these contactors suitable for applications with heavy vibration?
No. According to the installation conditions, the contactors must be installed and operated in environments free from obvious shaking, impact, and mechanical vibration.
What type of arc extinguishing design is used in the CJ12 series?
The main contact system of the contactor utilizes a single breakpoint rotating structure combined with a clay arc extinguishing chamber that features longitudinal slits to ensure excellent arc extinguishing performance.