China AC Contactor CJT1 - High Voltage Suppliers & Factory for 50Hz Electric Power Systems
Type and meaning
Normal working conditions and installation conditions
The altitude of the installation site should not exceed 2000m.
The ambient air temperature should not be higher than +40℃ and not be lower than -5℃.
When the highest temperature is +40℃, the relative humidity of the air on the installation site should not be higher than 50%: A higher relative humidity is allowed at a lower temperature: in the wettest month, the monthly average minimum temperature should not exceed +20℃, and the average maximum relative humidity should not exceed 90%. Measures should be taken for condensation on the product due to temperature change.
The inclination between the installation surface and the vertical plane should not exceed ± 5°.
Pollution level: level 3.
The product should be installed in a place without obvious shaking, impact and vibration.
Structural features of the product
CJT1 series AC contactor (hereinafter referred to as the contactor) is a new CJ10 product which is improved and designed on the basis of the original CJ10 series AC contactor. It can replace the obsolete CJ10 series AC contactor. With the same outline and installation dimension as the original CJ10 system, the contactor has a greatly improved contact and arc extinguishing system so that its highest rated working voltage is increased from 380V to 690V; it has a DMC plastic arc extinguishing chamber replacing the clay one and is provided with the arc extinguishing piece; it is provided with an improved contact structure, which improves the arc extinguishing performance, prolongs the contact life, reduces the flashover distance and the product weight, and eliminates the problem that the clay chamber is damaged easily.
Main parameters and technical performance
For the basic parameters of the main circuit of the contactor, please refer to Table 1. The sucking coil of the contactor can work normally within the range of 85% ~ 110% of its rated control power supply voltage Us.
| Product type | CJT1-10 | CJT1-20 | CJT1-40 | CJT1-60 | CJT1-100 | CJT1-150 |
| Rated insulation voltage and working voltage V | 380V | |||||
| Rated working current(AC-1-AC-4,380V) | 10 | 20 | 40 | 60 | 100 | 150 |
| Control power kw | 2.2 | 5.8 | 11 | 17 | 28 | 43 |
| 4 | 10 | 20 | 30 | 50 | 75 | |
| Number of operating cycles per hour times/h | AC-1, AC- is 600. AC-2, AC-4 is 300, CJT1-150AC-4 is 120 | |||||
| Electrical endurance 10,000 times | 60 | |||||
| 2 | 1 | 0.6 | ||||
| Mechanical endurance 10,000 times | Normally open and normally closed 300 | |||||
| Auxiliary contact | 2 Normally Open 2 Normally Closed AC - 150180VA:DC - 1360W Ith:5A | |||||
| Matched fuse | RT16-20 | RT16-50 | RT16-80 | RT16-160 | RT16-250 | RT16-315 |
| Coil power consumption vA | 65 | 140 | 230 | 485 | 760 | 950 |
| 11 | 22 | 32 | 95 | 105 | 110 | |
Outline and installation dimensions
For the outline and installation dimensions of the contactor, please refer to Figs. 1, 2 and 3 and Table 2. The contactor is fixed and installed on a vertical plane with 3 screws, and its inclination should not exceed ±5°.
Fig.1 Outline and installation dimensions of CJT1-10
Frequently Asked Questions (FAQ)
What are the ambient temperature requirements for installing the CJT1 AC contactor?
The ambient air temperature at the installation site should not be higher than +40℃ and not be lower than -5℃ for normal operation.
Can the CJT1 series AC contactor replace older CJ10 models?
Yes, the CJT1 series is an improved design based on the original CJ10 series. It features the same outline and installation dimensions, allowing it to seamlessly replace obsolete CJ10 AC contactors.
What improvements does the CJT1 series offer over older designs?
The CJT1 features an improved contact and arc extinguishing system, raising the rated working voltage to 690V. It replaces the clay arc chamber with a durable DMC plastic chamber, reduces weight, minimizes flashover distance, and extends contact life.
What is the allowable voltage range for the contactor's sucking coil?
The sucking coil is designed to function normally within 85% to 110% of its rated control power supply voltage (Us).
How should the CJT1 contactor be physically installed?
It should be secured onto a vertical plane using 3 screws. The inclination of the installation surface relative to the vertical plane must not exceed ±5°.