Dongguan Yinyin Hardware Products Co., Ltd. is a full-service company that integrates production, sales, service, and after-sales support. We welcome all buyers to contact us for negotiations. As a professional manufacturer specializing in silver contacts (in-mold riveted parts), stamping components, and low-voltage switches (such as wall switches and leakage protection switches), we focus on "safe electricity, safe switches, and safe electricians." Thank you for your attention! Our commitment is to provide comprehensive and detailed safety power services to our customers.
A circuit breaker is a type of load switch that provides both short-circuit and overload protection. Its short-circuit protection function is typically achieved through an electromagnetic coil. Due to its reliable protection features, ease of maintenance, and user-friendly operation, circuit breakers are widely used in power systems.
There are four main reasons why the circuit breaker's coil may burn out:
1. **Mechanical failure in the tripping mechanism**: If the coil becomes loose, the electromagnet core may shift during opening, causing the core to get stuck, which can lead to coil damage. Additionally, if the active stroke of the core is too short, the tripping mechanism might not activate properly when the opening circuit is energized, leading to prolonged current flow and eventual burnout.
2. **Improper adjustment of stroke and auxiliary switch contacts**: When adjusting the circuit breaker parameters, if the initial position of the auxiliary switch is not properly adjusted, it may fail to switch the opening circuit correctly, resulting in the coil being energized for too long and eventually burning out.
3. **Failure of the protection control device**: The opening command is issued by the protection control system. If the opening relay fails or the auxiliary control switch has excessive resistance, the opening command may not be released in time, causing the coil to remain energized and overheat.
4. **High resistance in the opening circuit**: Reduced insulation or excessively low resistance in the control circuit can cause a significant voltage drop, preventing the coil from reaching its required operating voltage. This results in the coil remaining energized for extended periods, leading to burnout.
To prevent coil burnout, the following measures can be taken:
- Replace the delay-closing contact in the opening circuit with a set of moving contacts. Regularly check the contact points of the auxiliary switch and the arm screw to ensure proper alignment and cooperation between the switch and the circuit breaker.
- Adjust the opening command timing appropriately so that the coil operates efficiently without staying energized for too long.
- Ensure regular maintenance of the protection control device and auxiliary switches to avoid malfunctions that could cause continuous energization of the coil.
Dongguan Yinyin Hardware Products Co., Ltd. was established in 2005 and specializes in manufacturing a wide range of electrical components, including silver contacts, electrical contacts, double composite silver nails, riveted silver contacts, soldered silver contacts, precision stampings, conductive copper posts, contact screws, electrical screws, DC and AC pins, rivets, silver dots, binding posts, and more. We also produce various products made from silver, copper, iron, aluminum, and non-magnetic steel. For inquiries, please contact Mr. Chen at 13728192869.
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