CKJ5 series vacuum AC contactor

1 Applicable scope

CKJ5 series vacuum AC contactors (hereinafter referred to as contactors) are mainly used in circuits  with AC 50Hz, rated working voltage up to 1140V, and rated working current up to 630A. They are used for long-distance connection and disconnection of circuits, and can be combined with appropriate thermal overload relays or electronic protectors to form vacuum electromagnetic starters. They are particularly suitable for forming isolated vacuum electromagnetic starters.

3.1 The ambient air temperature is -5 ℃~+40 ℃, and its average value within 24 hours does not exceed+35 ℃ . 3.2 Altitude not exceeding +2000m.

3.3 Atmospheric conditions: When the maximum temperature is+40 ℃, the relative humidity of the air does not exceed 50%. Higher relative humidity can be allowed at lower temperatures, such as reaching 90% at 20 ℃ .

Special measures should be taken for occasional condensation caused by temperature changes. 3.4 Pollution level: Level 3.

3.5 Installation category: Class III.

3.6 Installation conditions: Vertical installation, with an inclination of no more than ± 5 ° between the installation surface and the horizontal or vertical plane.

3.7 Impact vibration: The product should be installed and used in a place without significant shaking, impact, and vibration.

4 Main parameters and technical performance

4.1 Main specifications:

4.1.1 Divided by current grade：125、160、250、400、630；

4.1.2 According to the contactor coil rated control power supply voltage Us divided：exchange 50Hz：

36V、110V、127V、220V、380V。 4.2 Technical parameters:

4.2.1 The rated working voltage (Ue) and rated insulation voltage (Ui) of the contactor are 1140V;

4.2.2 The main parameters and technical performance indicators of the contactor are shown in Table 1.

Note: The auxiliary contacts of CKJ5-125-400 products connected to the coil are the first set of normally closed auxiliary contacts of NK2-1 (A) type auxiliary contact group. The auxiliary contacts of CKJ5-630 connected to the coil are the first set of normally closed auxiliary contacts of the auxiliary contact group and cannot be replaced.

CKJ5-125-160 can be equipped with an additional set of two normally open and two normally closed auxiliary contacts, which need to be specially customized and specified.

 4.3 Action range: The suction voltage is between 85% Us and 110% Us; The release voltage is between 10% Us and 75% Us.

5 Structural characteristics

The contactor consists of an electromagnetic system, a contact system, and auxiliary contacts. The CKJ5-125~400 contactor is arranged in a three-dimensional structure, with the upper part being the contact system and the lower part being the electromagnetic system. The electromagnetic system consists of a coil, iron core, and rectifier device, installed in a base made of cast aluminum alloy or DMC. The CKJ5-630 contactor is arranged in a flat structure, with a contact system on the left and an electromagnetic system on the right. The contact system consists of dynamic and static contacts and a vacuum arc extinguishing chamber, installed in a base made of insulating materials. The electromagnetic system adopts an energy-saving scheme of DC dual coil and dual winding.The vacuum arc extinguishing chamber adopts a new type of contact material for one-time sealing and discharging. The product has a compact structure, making it easy to assemble explosion-proof electromagnetic starters and switchgear.

6 Appearance and installation dimensions

The appearance and installation dimensions are shown in Figures 1 to 4 and Table 2.

Figure 1 CKJ5-125~160 Appearance and Installation Dimensions                                         Figure 2 CKJ5-250 Appearance and Installation Dimensions