1. When installing the wiring of the vacuum contactor, be careful not to lose screws, washers, terminals and other components to avoid falling into the contactor and causing blockage or short circuit. The screws should be tightened during installation to prevent loosening due to vibration. After checking whether the wiring is correct, the coil should be switched several times without charging the main contact to check whether the product is reliable before use. For contactors used for reversible conversion, in order to ensure reliable chain locking, in addition to electric chain locking, a mechanical chain locking mechanism should also be installed.
2. What are the main measures to improve the life of the https://www.acvacuumcontactor.com/Vacuum-Contactor? The vacuum contactor is an important low-voltage electrical component, and its life is one of the quality evaluation and main indicators. Therefore, it is very important to take measures to improve its life. Inhalation characteristics and reaction characteristics
Reasonable matching of properties can improve the life of the contactor. The working voltage of the vacuum contactor is 85%~110% N. When the contact is closed and the iron core is closed, the primary and secondary bounces of the contacts may cause the contacts to melt and increase their electrical corrosion. In order to reduce the contact bounce time, the mass and moving speed of the contact should be appropriately reduced, and the initial contact force of the contact should be appropriately increased. In order to reduce and prevent the second rebound of contact (at this time, the damage is more serious due to the large starting current), in addition to reducing the collision energy through good cooperation between the suction characteristics and the reaction force characteristics, it is also necessary to add a buffer to the electromagnetic system device to absorb the kinetic energy of the armature, etc. For rotating structures, appropriately changing the lever ratio between the armature arm and the contact arm can change the contact pressure and closing speed of the contact, thereby improving the bounce of the contact.
The magnetic separation ring of the AC core is a weak link in the machine. When electricity collides with the iron core, part of the magnetic ring hangs at the roots and corners of the outside of the iron core with the greatest stress, and is often easily broken. At present, the commonly used technology is to embed the magnetic separation ring tightly into the groove of the magnetic end of the static iron core and stick it around with adhesive to increase the mechanical strength.
In order to improve the mechanical life of the vacuum contactor, the area of the pole surface can also be increased to reduce the impact stress. The pole faces of the AC core and the edges and corners of the DC core can also be hardened to extend their service life. If the rotating parts reasonably choose a kinematic pair with a small friction coefficient and strong wear resistance, such as plastic-plastic or plastic-metal, or add a small amount of giant disulfide or graphite to the heat-resistant plastic to make bearings or guide rails, this will reduce the Very effective in terms of coefficient of friction and improving wear resistance.
Wuxi Haibang Electromechanical Manufacturing Co., Ltd. is managed according to the modern enterprise operation mechanism. The leading products are high-voltage vacuum contactors, medium-voltage vacuum contactors, low-voltage vacuum contactors, and vacuum contact fuse combinations. It is one of the main vacuum contactor manufacturers in China. one.Welcome to inquiry if you need to know more about vacuum contactor-fuse combination 7.2/12 details or order wholesale.
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