Power Relay notes you need to know

　Tell us about Power Relay, a device that can be converted in one or more electrical output circuits when input (or excitation) meets certain conditions. It can be used in a neutral point direct grounding system as a directional component for zero sequence current protection.
　　Power Relay The action of the contact can be divided into two parts: contact closure and contact disconnection, that is, the pull-in and release process of the relay, which are cyclically switched at a certain frequency to form a contact opening and closing phenomenon. There are many special physical and chemical phenomena, such as contact contact resistance, contact jitter, and arcing, during contact closure and opening.
　　Principle of action when the contacts are closed
Power Relay
Power Relay
　　When the moving contact and the static contact of the relay are in contact with each other, the contact rebound occurs, that is, the uncontrolled gap opening and closing, and the arcing heat generated by the arc and the energizing current at this time greatly affects the opening and closing ability of the 22F Relay.
　　Principle of action when the contact is opened
　　When the contacts are opened and the load is cut, dazzling sparks and arcs are generated, and the arc occurs until the arc voltage drops below the minimum arc voltage value, which causes significant damage to the contacts. Different contact materials and contact gap sizes directly affect the radiation state of the arc electrons and the ease with which they occur, so they are important conditions for determining the arc.
　　Precautions when using relays
　　1. In order to prevent contamination of the lead end faces, the lead terminals should not be directly contacted. Otherwise, the solderability may be reduced.
　　2. The position of the lead end should be the same as the hole position of the printed circuit board. Any unsuitable fit can cause dangerous stresses in the relay, which can affect performance and reliability. Please refer to the punch pattern in the sample for punching.
　　3. After the relay is inserted into the board, do not pull the pin to avoid affecting the relay seal or other performance.
　　4. Excessive pressure should not be applied to the relay housing during insertion to avoid cracking of the housing or changes in operating characteristics.
　　5. The insertion pressure of the quick connecting foot is 10 kg. If the insertion force is too large, the relay will be damaged. If the pressure is too small, the contact reliability and current carrying capacity will be affected.
　　6. It is particularly emphasized that if the relay accidentally falls or is impacted during installation, the electrical parameters may change, but the mechanical parameters may vary greatly. There are serious hidden dangers and should not be used as much as possible.
　　7. Do not use silicone-containing resins and protective agents as this may result in poor contact or even plastic relays.
　　8. Pay attention to the coil power supply and the contact power supply according to the specified polarity. The contacts are usually connected to the positive (+).
　　9. Avoid applying a voltage above the maximum allowable voltage on the coil, otherwise the temperature rise of the coil exceeds the insulation level of the enameled wire.
　　10. Rated load and service life Under the specified standard conditions, it is impossible to meet the various requirements of automotive relays.
　　Our company is Power Relay Supplier, welcome to come to us.

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What Are The Methods For Relay Debugging?

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