Surge protector is a device used to limit transient overvoltage and discharge lightning current. Due to the continuous operation, prolonged operation, or aging in harsh environments of the surge protector, it may also cause performance degradation, failure, and other faults due to lightning strikes and surges. Therefore, it is necessary to regularly inspect the surge protector. If the test results indicate that the surge protector has deteriorated or the status indicator has failed, it should be replaced in a timely manner. Junhe Electronics shares with you the lightning protection detection methods for surge protectors as follows:
Detection range of surge protectors
SPD of power lines, SPD of signal lines, etc
Surge Protection Device Testing Standards (Part)
YD/T 1542-2006 Signal Network Surge Protection Device (SPD) Technical Requirements and Test Methods
Determine the wiring type of the protection line
Use an N-PE loop resistance tester to test the resistance between the neutral line (N) and the protection line (PE) on the branch line led out from the main distribution board (box), and confirm that the line is TN-C or TN-C-S or TN-S or TT or IT system.
Inspection Content and Methods
1. Check and record the installation positions, quantities, models, main performance parameters, and installation processes of surge protective devices at all levels (material and cross-section of connecting conductors, color code of connecting conductors, and firmness of connection) 2. Conduct a visual inspection of the surge protector to ensure that its surface is flat, smooth, and free from scratches, cracks, burning marks, or deformation. The identification of surge protective devices should be complete and clear 3. Measure the distance between multi-level surge protectors and the length of the leads at both ends of the surge protector, which should comply with the requirements of lightning protection technical specifications 4. Check if the surge protector has a status indicator, and if so, confirm that the status indicator is consistent with the manufacturer's instructions 5. Check if there is a release device at the front end of the surge protector voltage limiting element installed on the circuit. If the surge protector does not have a built-in release device, check if there is an overcurrent protector and if the installed overcurrent protector meets the requirements of the lightning protection technical specifications 6. Check whether the voltage protection level of the installed surge protector meets the requirements of the lightning protection technical specifications 7. Check the installation process of the surge protector and the excessive resistance between the grounding wire and the equipotential bonding strip 8. Check the buried metal pipelines transporting fire and explosion hazardous substances and those with cathodic protection. When there is an insulation section at the outdoor entry point, the voltage switch type power surge protector or isolation discharge gap connected at the insulation section should meet the requirements of lightning protection technical specifications
Inspection cycle
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China