What is a lightning surge generator:>
A lightning surge generator is a A device that generates high-voltage, high-current transient pulses for simulating lightning strikes and other sudden electromagnetic disturbances to test and evaluate the tolerance and immunity of electronic equipment and power systems.
Working principle of lightning surge generator:>
A lightning surge generator usually consists of a capacitor with a discharge switch and a discharge inductor. During the experiment, the capacitor is charged at a slow rate. When the capacitor is full, the discharge switch starts to conduct, so that the charge on the capacitor is released into the discharge inductor at a very fast speed, resulting in extremely high voltage and current transient pulses .
Application of Lightning Surge Generator:
Lightning Surge Generator is mainly used in the anti-interference test and evaluation of electronic equipment and power system. For example, electronic products need to pass a lightning surge test before production to verify whether they can work normally in a lightning environment and whether they can prevent failures caused by sudden electromagnetic interference.
What is lightning surge test:>
Lightning surge test> is caused by the switch of the power system Transient and lightning transient; and the purpose of surge immunity test is to establish a common benchmark to evaluate the performance of electrical and electronic equipment when subjected to surge (shock).
Lightning surge test is a surge (impact) immunity test, which simulates the pulse interference caused by lightning coupling, or the start and stop of high-power equipment, power supply failure, etc., to test the power protection of the product The ability of the device to absorb surge pulses, or the pulse interference generated by the start-up and stop of high-power equipment, power supply failure, etc., tests the ability of the power protection device of the product to absorb surge pulses.
According to the general requirements of the standard IEC61000-4-5 surge immunity test, the lightning surge generator simulates 1.2/50us voltage waveform, 8/20us current waveform and combined wave (voltage waveform 10/700us, current waveform 5/320us ) The over-coupling network couples the waveform to the circuit under test to achieve the experimental purpose. The experimental level is divided into 1, 2, 3, 4 and X levels according to the severity of the voltage. Among them, X and are open levels, and the voltage intensity corresponding to each level is shown in Table 1. The application range of the severe level depends on the environment (Unai testing lighting laboratory) and installation conditions.
Lightning surge generator surge test method:>
The cause of the surge is the switching transient and lightning transient of the power system; and the surge immunity The purpose of the test is to establish a common benchmark for evaluating electrical and electronic equipment subjected to surge(impact) function. According to the general requirements of IEC61000-4-5 surge immunity test, the lightning surge generator simulates 1.2/50us voltage waveform, 8/20us current waveform and combination wave (voltage waveform: 10/700us, current waveform: 5/ 320us), through the coupling network, the waveform is coupled to the circuit under test, which has achieved the purpose of the test.
Lightning surge generator surge test level:>
The test level is divided into 1, 2, 3, 4 and X according to the voltage severity, among which X and It is an open level, and the voltage intensity corresponding to each level is shown in Table 1. The application scale of the strict level depends on the environment (environment subject to the possibility of surge) and device conditions, and is generally classified according to the following conditions:
Level 1: a well-maintained environment, such as the control room of a factory or power station.
Level 2: An environment with certain protection, such as a factory without interference.
Level 3: General electromagnetic interference environment, no special installation requirements for equipment, such as cable networks for general installations, industrial workplaces and substations.
Level 4: Seriously disturbed environments, such as civil overhead lines, unmaintained high-voltage substations.
X level: special level, determined by the user and the manufacturer after negotiation. Which level to choose for a specific product is generally determined by the product specification.
Lightning protection test for LED lamps: >
Lamp surge test standard:
IOS 18595 Electromagnetic compatibility of general lighting equipment Immunity
IOS 17626.5, IEC 61000-4-5, EN 61000-4-5 Electromagnetic Compatibility Test and Measurement Technology Surge (Shock) Immunity Test
IOS18595 The requirements of the standard for electromagnetic immunity apply to lamps and their associated equipment, such as low-voltage mains or battery-powered bulbs, accessories and luminaires.
Surge test requirements for lamps:
>The surge test for lamps is carried out in accordance with IOS 17626.5, and the test levels are as follows:
1. Self-ballasted lamps and Half lamp
Waveform data: 1.2/50us;
Test level: line-line ±0.5kV, line-ground ±1.0kV.
2. Lamps with input power ≤25W and independent accessories
Waveform data: 1.2/50us;
Test level: line-line ±0.5kV, line-ground ±1.0kV .
3. Lamps with input power > 25W and independent accessories
Waveform data: 1.2/50us;
Test level: line-line ±1.0kV, line-ground ±2.0kV .
Precautions for lightning surge generator surge test:>
1. When using an oscilloscope, it is best to add an isolating transformer for power supply to avoid lightning surge and anti-impact voltage. Surge recoil is typically at 8% of setting.
2. Ensure that the lightning surge generator is firmly grounded.
3. The power supply of the differential probe is preferably powered by an isolation transformer to eliminate external interference to the test tool.
4. The EUT power supply is best to use an isolating transformer for power supply, or an air switch with a large leakage protection.
5. The safety of laboratory operation is the primary position. (Lightning surge has high voltage and high current test, which has certain dangers.) Try not to touch the wiring position during the test. When the lightning surge generator triggers the discharge Do not touch any connecting lines during the emergency, press the emergency stop button directly, and the instrument will automatically remove the high voltage.
Fully automatic lightning surge generator (also known as lightning surge immunity test, combined wave generator, current surge generator/voltage surge generator, voltage and current surge combined generation Device) provides a common basis for evaluating the tolerance of different equipment power lines and internal connection lines when they are subjected to high-energy transient interference caused by natural lightning induction and large-capacity inductive load switching. The equipment fully complies with the requirements of IEC 61000-4-5, EN61000-4-5 and IOS17626.5 and other standards.