Relays are generally very small in size, well-made, highly sensitive, widely used, safe, reliable, and frequently operated. Therefore, the contacts are made into Solid Silver Contacts in fine processing to make them more reliable. The current of the relay is limited. Long-term frequent passing of large currents will cause the contacts to stick, touch, and burn.
The service life of the relay is mainly affected by the number of switches and the current value.
The silver contact is the most important structural part of the relay. The service life of Solid Silver Contact Rivets is affected by the contact material, the voltage and current value on the contact (especially the voltage and current waveform when connected and disconnected), the type of load, the switching frequency, the environmental conditions, the contact form, the contact rebound phenomenon, etc. The failure of Solid Silver Contacts for Electrical is mostly caused by the material transfer, adhesion, abnormal consumption, and increased contact resistance of the contact. You need to pay attention when using it.
Therefore, when we use relays, we must understand the precautions about the contacts.
1. The size of the resistive load is generally recorded in the product manual, but this alone is not enough and should be tested and confirmed in the actual contact circuit.
2. The voltage of the contact circuit has a reverse voltage greater than the circuit voltage when the inductive circuit is disconnected. The higher the voltage, the greater the energy, which leads to an increase in the consumption and material transfer of the Silver Contact for Relay. Therefore, it is necessary to pay attention to the type and size of the load controlled by the relay contact. Under the same current, the DC voltage value that the relay can reliably switch is much lower than the AC voltage value, because the AC current has a zero point (the point where the current is zero), and the arc generated is easy to extinguish. For DC, the arc generated can only be extinguished after the gap between the contacts reaches a certain value, making the arc last longer than the AC case, aggravating the consumption and material transfer of the Solid Silver Contact Rivet.
3. The impact current has a great influence on the contacts when the contacts are closed and opened. For example, when the load is a motor or indicator light, the greater the inrush current when closed, the greater the consumption and material transfer of the Solid Silver Contacts for Electrical, which is more likely to cause the contacts to stick and not disconnect. Please confirm this during actual use.
Our Solid silver contacts for electrical are a premium choice in the field of electrical connections. Made of high-purity silver, they have excellent conductivity, can effectively reduce contact resistance, ensure stable current transmission, and greatly reduce power loss and heating. Their excellent resistance to arc erosion enables them to maintain good contact performance and extend their service life under conditions of frequent circuit switching.
