Flash relay is a common electrical element that acts as a switching signal conversion in the control circuit. The flash relay usually consists of one solenoid coil and multiple contacts, and when the solenoid is activated, it attracts the contacts to close or break, thus realizing the switching operation of the circuit. The following two aspects will introduce the component from the broken performance of the flash relay and how to measure the quality of the flash relay.
1. Bad performance of the flash relay
When a flash relay fails or breaks down, several common problems may appear:
Contact adhesion: The contacts of the flash relay may adhere due to prolonged use or dust accumulation, causing the contact not to open or close normally. This causes the control circuit to fail to function properly or generates an abnormal signal.
Contact wear: Frequent switching operations can cause contact wear of the flash relay. When the contact is seriously worn, poor contact can cause spark, arc or high temperature phenomenon, which may lead to short circuit, open circuit or other faults.
Coil fault: the flash relay may have an open or short circuit. This causes the current to fail through the coil, leaving the relay to working properly.
Abnormal noise: abnormal noise may occur when the flash relay fails. These noises are usually caused by poor contact contact, coil vibration, or problems with other mechanical components.
2. How to measure the flash relay
To determine whether the flash relay is working properly or failing, the following measures may be taken by:
Contact check: Use a multimeter or a simple circuit tester to measure the resistance and conduction between the contacts, respectively. Normally, a closed contact should show a resistance value like zero ohms, and a disconnected contact should show an infinite resistance value.
Coil test: Use a multimeter or a simple circuit tester to measure the resistance value of the flash relay coil. According to the specifications and design requirements of the relay, it can judge whether the coil is normal. Usually, the resistance value of the normal working relay coil should be within a certain range.
Contact strike: For the adhesion or poor contact contact, try to gently tap the relay shell in order to restore the contact to normal through vibration. However, this method can only be a temporary solution, and can not fundamentally solve the problem.
Noise detection: Noise detection through observation and hearing, if the flash relay produces abnormal noise, there may be faults or mechanical problems. This usually requires experience and expertise to determine if the noise is normal.
If the flash relay has an obvious failure or fails to work properly, it is recommended to replace or repair the relay in time. If you are not sure of the relay, try a test with an alternative relay to verify for a fault.
In conclusion, a flash relay is a common electrical element used to control the switching operation of a circuit. When the flash relay fails, problems such as contact adhesion, contact wear, coil failure, and abnormal noise may be shown. To measure the quality of the flash relay, contact inspection, coil testing, contact strike and noise detection can be performed.
Based on the test results, you can determine whether the relay needs to be replaced or repaired to ensure the proper operation of the circuit