Surge tester: characteristics of 6kV surge generator

What is a surge tester?
Surge tester “is an advanced high-voltage power supply and measurement unit composed of programmable pulse sequences and advanced mode analysis software. The instrument uses a normal 115 or 220V AC power supply and converts it to the higher voltage required for surge testing. The higher voltage is rectified into a DC voltage, which charges the larger discharge capacitor. The other end of the discharge capacitor is connected to the test load DUT through the output lead of the surge tester.

Application range of surge tester:
According to the latest Electromagnetic Compatibility (EMC) Directive 2004/108/EC, household radio and television receivers, mobile radio equipment, medical and scientific equipment, household appliances and electronic equipment, teaching electronic equipment, radio broadcasting and television transmission equipment, industrial manufacturing equipment, mobile radio communication and commercial radiotelephone equipment, information technology equipment, aviation and maritime radio equipment, communication network equipment and instruments, General lighting fixtures, fluorescent lighting fixtures, and other electronic and electrical products require surge immunity testing

Lightning surge test is a surge (impact) immunity test that simulates the pulse interference generated by lightning coupling, startup and shutdown of high-power equipment, power supply failure, etc. It tests the ability of the product’s power protection device to absorb surge pulses, or the pulse interference generated by startup and shutdown of high-power equipment, power supply failure, etc. It also tests the ability of the product’s power protection device to absorb surge pulses.

1.1 Causes of surges:
Switching Transients in Power Systems:
a) Main power system switching disturbances, such as capacitor bank switching;
B) Minor local switch actions or load changes in the distribution system;
C) Resonance phenomenon associated with switching devices (such as thyristors);
d) Various system faults, such as short circuit and Arc fault of equipment combination to grounding system.

Lightning transient:
a) Direct lightning strikes an external (outdoor) circuit, injecting a large current that flows through a grounding resistor or external circuit impedance to generate voltage;
B) Indirect lightning (i.e. electromagnetic fields generated by lightning strikes between or within clouds or on nearby objects), induced voltage and current generated by it on conductors inside and outside buildings;
C) The lightning current discharging directly to the ground nearby will generate induced voltage when it is coupled to the common grounding path of the equipment combination Earthing system.
When the lightning protection device operates, voltage and current may undergo rapid changes and may be coupled to internal circuits.

1.2 Purpose of surge immunity test:
The purpose of surge immunity testing is to establish a common benchmark to evaluate the performance of electrical and electronic equipment when subjected to surges (impacts).
1.3 Surge Immunity Test Standards:
The national standard used for surge (impact) immunity test is GB/T17626.5-2008 “Electromagnetic Compatibility Testing and Measurement Techniques Surge (Impact) Immunity Test”, which is equivalent to the international standard IEC61000-4-5:2005
The standard describes two different waveform generators, one is a combination wave generator (lightning surge generator) with voltage waveform of 1.2/50us and current waveform of 8/20us, and the other is a combination wave generator that meets the requirements of the International Telecommunication Union Commission (voltage waveform of 10/700us and current waveform of 5/320us).

Characteristics of 6KV Surge Generator：
1. Integrated design, built-in single-phase coupling decoupling network, with a total size of 4U/19 “, saving space while facilitating testing and mobility
2. Android control system, equipped with a 10 inch color capacitive touch screen, easy to operate and intelligent
3. The entire machine adopts semiconductor electronic switch technology, with smooth waveform and precise output
4. Pulse group voltage output range: 0.1~5.5KV, surge voltage output range: 0.1~6KV
5. Each surge interferes with the output, and the output waveform is displayed in real-time on the screen (including precise values of voltage and current)
6. After surge impact, support sample failure judgment and provide beep alarm
7. The instrument has a built-in calibration coefficient, and users can connect an oscilloscope and accessories to verify the voltage on site, without the need to return to the factory for calibration
8. The power supply capacity of the tested sample AC: 0-260V/20A DC: 0-200V/20A
9. Each test can choose to automatically save or directly export the test report in Word format. The report template supports editing and selection
10. Can be directly exported to external storage devices via USB
11. Using the latest technology to solve the problem of voltage drop caused by decoupling inductance during DC power supply in the industry
12. Adopting the latest technology without the need for additional isolation transformers to solve the problem of leakage protection switch tripping caused by surge leakage current

The source of surge voltage generated by lightning:
1. Direct lightning strikes act on external circuits, injecting a large current that flows through a grounding resistor or external circuit impedance to generate voltage.
2. Indirect lightning strikes that generate induced voltage and current on the inner and outer conductors of a building.
3. The lightning incoming current discharged directly to the ground nearby is coupled to the public grounding circuit of the equipment Earthing system. When the protective device operates, voltage and current may undergo rapid changes and may be coupled to internal circuits. The surge simulator for simulating unipolar transient pulses mainly consists of two parts: a combination wave signal generator and a coupling/decoupling network.

Precautions for using 6KV lightning surge generator:
1. When using an oscilloscope, an isolation transformer is added to power supply to prevent lightning surge backflushing voltage from affecting the oscilloscope power supply. Lightning surge backflushing is generally set at 8% of the set voltage.
2. Ensure that the lightning surge tester is grounded reliably.
3. The power supply of the differential probe is powered by an isolation transformer to eliminate external interference with the testing tool.
4. The power supply is powered by an isolation transformer or by an air switch with high leakage protection.
5. The safety of experimental operation is the primary position (lightning surge has high voltage and high current experiments, which have certain risks). During testing, try not to touch the wiring position. When the lightning surge tester triggers discharge, do not touch any connecting lines. In case of emergency, press the emergency stop button directly, and the instrument will automatically remove the high voltage voltage.

The SG61000-5 fully automatic surge generator (also called lightning surge immunity test, combination wave generator, surge current generator/surge voltage generator, combined surge voltage and current generator) . 

SG61000-5_Surge Generator

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

Please feel free to contact us if you need any support.
Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618117273997