Dongguan Yinyin Hardware Products Co., Ltd. is a one-stop service enterprise integrating production, service, sales and after-sales. Welcome buyers to negotiate! Thanks to the manufacturer of professional silver contacts (in-mold riveting parts), stamping parts, low-voltage switches (wall switches, leakage switches, etc.) that focus on "safety electricity, safety switches, safety electricians"! Thank you for your attention! ! Committed to providing users with the most comprehensive safety power detail service! The circuit breaker is a kind of load switch with short circuit and overload protection function, and its short circuit protection function is realized by electromagnetic coil. Due to the perfect protection function, convenient maintenance and use, the circuit breaker is widely used in power systems.
There are four main reasons for the breaker winding coil to burn out:
Mechanical failure of the opening mechanism. When the coil is loose, the electromagnet core is displaced when the circuit breaker is opened, so that the iron core is stuck, causing the coil to burn out; or because the active stroke of the iron core is short, when the power of the opening circuit is turned on, the iron core does not open the tripping mechanism. , so that the coil is energized for a long time, causing burnout.
The stroke and auxiliary switch contacts are not properly adjusted. When the circuit breaker parameters are adjusted, the initial state of the circuit breaker opening is changed, and the initial state of the auxiliary switch opening position is not adjusted accordingly, which will cause the auxiliary switch to not normally switch the opening circuit and cause the opening coil to burn.
Protection control device failure. The opening command is issued by the protection control device. If the opening relay in the device fails, or the opening of the auxiliary control switch of the opening control circuit is large, the opening command cannot be exited in time, and the opening coil will be long. Time is charged and burned.
The opening circuit resistance is too large. The insulation of the opening coil circuit is reduced, or the resistance of the control circuit is too small, resulting in a large resistance, which causes the voltage drop of the opening control circuit to be large, resulting in the voltage not reaching the action value of the coil opening voltage, so that the opening coil is energized for a long time. burn.
The following measures can be taken to prevent burnout:
First, the delay-closing contact of the opening circuit is changed into a pair of moving contact, and the contact of the auxiliary switch and the arm screw of the auxiliary switch are frequently checked, so that the auxiliary switch and the circuit breaker are opened at the correct position. Effectively cooperate.
The second is to reasonably adjust the opening command time so that the opening and closing command time issued by the protection control device can not only make the opening coil work, but also not too long.
Founded in 2005, Dongguan Yinyin Hardware Products Co., Ltd. specializes in: silver contacts, electrical contacts, double composite silver nails, riveted silver contacts, soldered silver contacts, various precision stampings, conductive copper posts, contacts Screws, electrical screws, DC, AC pins, rivets, silver dots, binding posts, stamping parts and production of various silver, copper, iron, aluminum, non-show steel and other heterosexual products, electricity, mobile phone 13728192869, Mr. Chen hot key Word search relay contacts, composite contacts, switch contacts, silver contacts, silver contacts, double composite contacts, triple composite contacts, shaped contacts, electrical contacts, environmentally friendly contacts, in-mold riveting contacts, silver Alloy contacts, rivet contacts, punching and riveting contacts, solder contacts, riveting contacts
Http://news.chinawj.com.cn Submission:
Steel swing door are hollow metal doors, fit for emergency exit or pedestrian entrance application, widely used in all factory, office building, and apartment building. It can also be fire rated. According to size, it can be made into single leaf or double leaf swinging doors. And hardware can be customized according to your requirement. Steel swing door can be with leveler handle lock, panic bar device, door closers or other needed hardware.
Steel Swing Doors, Hollow Metal Door,Double Swing Metal Doors, Steel Fire Door, Emergency Exit Door, Fire Rated Door
SHANGHAI KENVO DOOR CO.,LTD , https://www.kenvodoor.com