Circuit breaker with auxiliary contacts; role of auxiliary contacts
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Dongguan Yinyin Hardware Products Co., Ltd. is a comprehensive enterprise that integrates production, service, sales, and after-sales support. We welcome all buyers to contact us for detailed negotiations! As a professional manufacturer specializing in silver contacts, in-mold riveted parts, stamped 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 and trust! We are committed to delivering the most complete and reliable power safety solutions to our customers.
Auxiliary contacts work in tandem with the main contact to indicate the open state of the circuit breaker. In many cases, the current or voltage of the main contact is too high or too large to be directly monitored, so an auxiliary contact is used instead.
Common applications include:
1. Connecting an indicator circuit to show the open state of the circuit breaker.
2. Linking a blocking circuit for interlocking operations and ensuring the safety of multiple electrical devices.
3. Integrating into a remote signal loop for remote monitoring of the circuit breaker status by control centers.
4. Connecting to a fault detection loop for identifying the type of fault in certain situations.
Types of auxiliary contacts:
1. "A" contact: This contact is in the same state as the main contact—when the main contact opens, the "A" contact also opens, and vice versa.
2. "B" contact: This contact operates in the opposite state to the main contact—when the main contact opens, the "B" contact closes, and vice versa.
3. Make-before-break contact: This contact closes earlier than the main contact during closing, helping to suppress inrush current when opening.
4. Alarm contact: It only activates when the circuit breaker fails to trip, not during normal operation, allowing for fault detection.
5. Delayed contact: Equipped with a delay mechanism, it is used where a delayed auxiliary signal is required.
The primary function of an auxiliary contact is to transmit the switching signal of the circuit breaker, similar to the auxiliary contact found in contactors.
Established in 2005, Dongguan Yinyin Hardware Products Co., Ltd. specializes in manufacturing a wide range of products, including silver contacts, electrical contacts, double composite silver nails, riveted and soldered silver contacts, precision stampings, conductive copper posts, screws, electrical fasteners, DC and AC pins, rivets, silver dots, binding posts, and more. We produce various metal components made from silver, copper, iron, aluminum, and non-ferrous steel. For inquiries, please contact Mr. Chen at 13728192869.
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