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LSS-15AX Series (discontinued)

Lightning Surge Simulator LSS-15AX Series

Conforming to IEC 61000-4-5 


Surges represent transients that might be induced in cables by lightning. By their nature, fairly high energy charges may easily damage or upset unprotected electronics circuits and components. Surges are not a new problem. Many companies have been testing their products at various stages of the products life: design tests, qualification tests, production tests and diagnostic tests.


The advance of surge suppression devices and technique does not lessen the importance of surge testing, but rather increases it, as the requirement to reduce power consumption and to increase the operational speed of semiconductors has become more demanding.  In addition, the issue of surge testing is attracting renewed interest since this form of immunity is now a must for almost all electronic products for access to the global market.



Fully compliant with the requirements called for in the 2nd edition of IEC 61000-4-5 standard, the LSS-15AX series simulators provide a testing facility for up to 15kV test voltage without sacrificing safety and ease of use. The LSS-15AX simulators generate the two combination pulses 1.2/50 μs (8/20 μS) and 10/700 μS (5/320 μS).


  • Fully programmable and easy to use simulator that meets and far exceeds the IEC 61000-4-5 (2nd edition) requirements
  • 15kV testing
  • Advanced safety
  • Flexible test sequencing with Program Mode



Easy operation Very intuitive settings can be done by the assistance of the well configured user-interface consisting of a 5-inch LCD, ten-key, functions keys and others. Coupling modes are graphically shown, allowing the operator to select the desired mode and allows easy reference of settings when the test is in progress.
Emergency stop button This button, easily accessible and placed on the front panel, enables the operator to stop the generation of the pulses anytime he/she desires. In addition to the high voltage power, the operator can turn off the EUT.
Safety interlock A safely interlock is provided through the special design high voltage connector. The high voltage circuitry never be activated when the connector is not correctly positioned or not firmly locked.
Peak level monitor

The value of the actual peak amplitude is measured and shown for both voltage and current.

Automatic stop by detecting breakdown

The simulator automatically stops generating the pulses if the peak current measured exceeds the threshold limit which can be preset by the operator.





Item LSS-15AX A1A/A3A LSS-15AX C1A/C3A
Surge generating
Output waveform
Open circuit voltage (short circuit current)
1.2/50µs(8/20µs) 1.2/50µs(8/20µs)
Output voltage/current 15kV/7500A 15KV/7500A (1.2/50µs)
15KV/375A (10/700µs, at output 40 ohm)
Surge switching element By Ignitron
Output polarity Positive or negative
Surge repetition cycle 20 sec. 20 sec. (1.2/50µs)
30 sec. (10/700µs)
Output impedance 2 ohm 2 ohm (1.2/50µs)
40 ohm (10/700µs) with limiter resister
AC/DC lines CDN Injecting surge waveform 1.2/50µs
Injecting surge voltage/current 15kV/7500A maximum
Surge coupling Between line and line:18µF
Between line and PE: 10 ohm+9µF
AC Power capacity A1A/C1A:  Single phase,AC240V/30A
A3A/C3A: Single phase 3-phase, AC600V/50A
Voltage drop 9V at 25A, 11V at 30A, 18V at 50A
DC Power capacity DC60V/20A
Decoupling coil 1.5mH (each phase)
Decoupling capacitor 10µF (Between line and line, between line and PE)
Coupling phase angle control 0 to 360° (at 1°step)
Residual voltage <15% of test voltage or twice of rated voltages (peak) of EUT
Communication lines CDN Injecting surge waveform

Injecting surge voltage 15kV max.
Matching resistance 40 ohm (1.2/50µs)
25 ohm (10/700µs )
Total line number 4 lines
Decoupling coil 20mH(each phase)
Power capacity of EUT DC50V 100mA
Voltage/ current monitor output Voltage/current monitor output ratio 1/2000 (voltage monitor), 1000A/V (current monitor)
Check circuit method Waveform measuring method by magnetic coupling
Auto control functions Surge generating unit
  • Polarity selection
  • Surge output port selection
  • Surge waveform selection
  • Polarity selection
  • Output port selection
  • 10/700µs limiter resister selection
AC/DC lines CDN
  • Surge injection phase selection
  • Surge return phase selection
  • Coupling element selection
Communication lines CDN
  • Matching resistance selection
  • 2 lines/4 lines selection
  • Surge return line selection
Application function Operation mode
  • Manual test mode  
  • Program test mode
Voltage/current monitor function
  • Peak level display
  • Break down detecting
External interface Communication function RS-232C(Optional),  GP-IB (Optional)
Power supply AC90 to 120/200 to240V         50/60Hz
Dimensions (W)x(H)x (D)mm 555x1250x790mm (A1A)
555x1500x790mm (A3A)
555x1500x 790mm (C1A)
555x1800x790mm (C3A)
Weight Approx. 200 kgs (A1A)
Approx. 320 kgs (A3A)
Approx. 270 kgs (C1A)
Approx. 340 kgs (C3A)


The following menus can be selected in the menu display.

  • Manual mode test
  • Program mode test
  • Utilities
  • Snap shop: Display image (Bit map form) can be saved in a memory card and can be used for making reports, etc


When Manual mode test is selected in the menu display, the corresponding test setting display will be shown. The output voltage, waveform and other test parameters can be set. Unnecessary items are indicated in gray and the simulator does not accept change in setting.
Some items can be selected on pop up menus.  The right example shows the choices on "Output To".

Press the coupling mode key. Coupling mode selection screen will appear.  The example shows the 3-phase AC CDN screen on which coupling and return lines can be set.  On the telecom CDN setting screen the number of lines (2 or 4 lines), limit resistance (25 ohm or 40 ohm) and return line (1, 2, 3, 4 or PE) can be set. 




Capacitive coupling on single-phase AC lines in Line-to-line & line-to-ground modes.

The following accessories are included.


  • AC line input cable (3-core: 2m): 1pc  (single-phase CDN model)
  • AC line input cable (4-core: 2m): 1pc  (three-phase CDN model)
  • DC line input cable (3-core: 2m): 1pc
  • Surge output cable for surge output (2m) : 2 pcs
  • Surge output cable for injection line (2m) : 3 pcs for single phase CDN model, 5 pcs  for three-phase CDN model
  • Monitoring coaxial cable (1m): 2 pcs
  • PE cable (for main unit: 2m): 1pc
  • PE cable (for injection line: 2m): 1pc
  • Interlock connector: 1pc
  • Instruction manual: 1 pc (English)
  • Connector caps (5 pcs for single phase CDN model, 7 pcs for three-phase CDN model) are fitted to the main unit when it leaves the factory.