The overview and working principle of dc contactor

Publisher： Apollo / 2021-08-14/ Views：1180

What is the dc contactor? Next, what is the dc contactor, taking the answer of this question.

Contact points of the design scheme selection specification less modular design, application and good performance of ac contactor assembly parts. Also can be made according to different requirements of customers to carry out the humanized products, saving resource reasonably, according to the contactor, can undertake high pressure and, also can use HengChui electromagnetic field magnetic blow, open working voltage disconnect transformation. Widely used in commercial production, make the electricity can get reasonable control, use of internal coil, the current rate under the action of electromagnetic fields, to promote the new product research and development and manufacturing, thus promotes the r&d and manufacturing of high-tech products.

Ac contactor coil design, internal switch power after connect, according to the current coil, the conversion of electromagnetic field. The static iron core contains the electrical flow magnet adsorption, promote the core, contact. Assumptions often close contact, present a disconnect situation, application, often contact is closed, a connection between the two. After turn off the power supply, the coil will be according to the current utility of magnet adsorption force disappears, switch contact will be disconnected.

1. The selection of dc contactor type of dc contactor should be according to the types of load current and load to choose the light and heavy, that ac load or dc load, is a general load or light load, heavy load.

2. According to the experience formula to calculate or greater IN the main contact PN/(1 ~ 1.4) UN motor/motor contactor main contactor can be rated voltage according to the experience formula to calculate acuity PN/motor IN the main contact (1 ~ 1.4) UN motor IN dc contactor control motor running turn, brake system, or process, usually have access to the rated voltage.

Direct contact

3. The main contact of the factory brand of the rated voltage of ac contactor is shown in the working voltage of affordable rated voltage refers to the main contact, rather than attract the working voltage of coil, the application of ac contactor the main contact rated voltage should be not less than the rated voltage of the load.

4. The actual operation frequency refers to the actual operation of the selection of frequency ac contactor conduction rate per hour. In conduction flow is very big and conduction under the condition of frequency is too high, can lead to serious contact overtemperature, and even the arc welding. If the actual working frequency values more than requirement, high power is adopted at rated voltage dc contactor.

The rated voltage of the rated coil voltage coil is not necessarily equal to the rated voltage, and the main contact when the circuit is simple, less application of household electrical appliances, can immediately use the working voltage of 220 v or 380 v, such as line multifarious, used electrical appliances more than 5 h, available 24 v, 48 v or 110 v working voltage (220 v, 110 v or 127 v) of the coil.