SGVA impulse test systems can be used to generate impulse voltages simulating lightning strokes and switching surges. The total charging voltage ranges from 20 kV to 10’000 kV with a per-stage energy of 20 to 30 kJ. This wide range permits optimum capacity selection for any test assignment. The system has all our experience acquired, in building Impulse Generators since 1932, behind it.

Our generators withstand earthquakes and strong winds due to extreme engineering design and our outdoor systems are also protected against fire & lightning.

The impulse test system operates under a control system which charges the impulse generator through the charging unit.

SGV generators are based on MARX multiplier circuits and stages in the impulse generator are connected and charged in parallel via the charging resistors. Charging time and charging voltage and polarity can be selected by the operator.

Once the selected charging voltage has been reached, a trigger pulse initiates firing of the first spark-gap of the impulse generator.
The resulting over-voltage triggers the successive stages. As all the spark-gaps fire, the stages which are in series now, add up to reach the test voltage

An impulse voltage divider reduces the impulse voltage to a value that the measuring and recording instruments can use.

The major impulse circuit elements such as capacitors and resistors are arranged in an optimum manner to simultaneously satisfy the two major requirements, smallest-possible internal inductance and operating convenience.

The electronic measurement and control components are designed and manufactured in-house. Our many years of experience in dealing with electromagnetic compatibility of electronic devices in high voltage test bays provide the requisite expertise and a trouble-free operation and a long service life are thereby ensured.

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