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Impulse Voltage Tester for Solar PV (Photovoltaic) cells

Impulse Voltage Tester for Solar PV ( Photovoltaic) Cells with 500 Joules energy as per IEC 61730

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SCR make Impulse Voltage Testers are designed to simulate voltage impulses from lightening strikes on Solar Photovoltaic (PV) cells. This test is described in IEC 61730 – 2 (clause 10.5 Impulse Voltage Test MST 14).

As per IEC 61730 – 2, the solid insulation of the module should with-stand over-voltages of atmospheric origin as well as from switching of low-voltage equipment. This Impulse Voltage Test Instrument is custom designed for this particular test. The waveform generated by the Impulse Voltage Test Instrument is exactly as required as per IEC 60060 – 1. This waveform (1.2 \ 50microSec) is common to most of the Impulse Voltage Testers except that the energy requirement for this Solar Photovoltaic (PV) is very higher in comparison.

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The peak voltage can be adjusted by the user. The test sequence i.e. number of Impulse for Positive and Negative polarity, time between two subsequent impulses & so on can be programmed with the help of a dedicated PLC module. The entire sequence, for both positive and negative impulse is automatic. At the end of the test, the test results are displayed on HMI. Output is provided for connecting an oscilloscope for displaying the Wave Form at the output Terminals. In case any flash over occurs, it is detected by a circuit which stops the test sequence, and PLC displays the number of cycles with polarities at which the failure has taken place.

 

Salient Features

  • Programmable and fully automatic sequence.
  • HMI / LCD Display for indication of test parameters and result.
  • Programmable module with sequencing for setting of:
    1. Positive , Negative or both polarities.
    2. No. of pulse for Positive or Negative polarity.
    3. Duration between two consecutive pulses
  • Selection of polarity : Automatic through PLC Unit
  • Automatic flash over detection and cut–off circuit
  • Digital display for flashing number of cycles with polarities for breakdown; Voltage Indication: Digital Meter to indicate peak voltage.
  • Output pin for output to oscilloscopes to view exact shape of the wave
  • Correction networks to correct the waveform to compensate capacitive load.
  • Digital voltmeter to indicate the peak voltage.
  • Lamp Indications for Test ON, Pass, Fail, Door Open, Positive Polarity and Negative Polarity selection automatic.
  • Emergency OFF push button.
  • Test Lock key switch to ON/OFF or avoid unauthorized person to operate the equipment

Specification

  • Mains Supply : 230 V, 50 Hz. (Other supply optional)
  • Output Peak Voltage : 2 kV to 12kV adjustable manually
  • Wave Form : 1.2/50 µs
  • Output Impedance : 2 Ohms, 12 Ohms
  • Energy Maximum : 500 Joules.
  • Energy Maximum : 500 Joules.
  • Capacitor : -2.5 Micro Farad.
  • Minimum Charging time: 3 seconds.
  • Load: Capacitive 5 nF to 80 nF
  • Output for Oscilloscope: Attenuated output 0 to 12V for 0 to 12kV
  • Impulse Voltage : 2 kV to 30kV adjustable
  • Impulse Rise Time : 1.2 micro sec. +/- 30%.
  • Impulse Fall Time : 50 micro sec. +/- 20%.

Application

Impulse voltage tests are recommended with the object to determine effect of voltage stress on insulation due to voltage surges of short durations. A surge is a form of over voltage, which may be defined as an exceptional voltage in excess of peak voltage to earth at line or electrical system of which line forms a part (can be caused as a result of lightning strikes as well as other overvoltage spikes in the power system level).

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Impulse Voltage Tester for Solar PV Cells (Photovoltaic Cells)

SCR Elektroniks manufacture Impulse Voltage Testers to simulate voltage impulses from lightening strikes on Solar Photovoltaic (PV) cells. This test is described in IEC 61730 – 2 (clause 10.5 Impulse Voltage Test MST 14).

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Impulse-Tester-6.5kv

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