GBS Test Pulse rev3 Pulse Generator for Long-Term Insulation Tests

The test pulse setup is designed for long-term insulation tests on test specimens of up to 6 nF capacitance.

Converter for high-voltage test transformer

· Internal sine wave generator: 50-200Hz.
· Pulse width modulation 16-24kHz of the sine wave via full bridge.
· Converter voltage 0-600V adjustable, Imax=2.6A, maximum power 1.3kW
· Pulse current limiting 110A (shutdown threshold)

Pulse transformer - control

· Control via full bridge
· Full bridge power supply adjustable 0-1000V, 1.3A max.
· Pulse current limiting 100A (shutdown threshold).
· Pulse width 20-120μs, nominal 94μs, adjustable
· 2 selectable series inductances 150μH, 300μH, to adapt the pulse width or rise times to the load capacitance and voltage.
· Pulse repetition rate 0.1 - 2.5 kHz, adjustable.
· Polarity: Selectable positive, negative, or alternating depending on the polarity of the sine signal.
· Cosine-shaped pulse at the transformer output

Pulse transformer cascade

· Output transformers in a 5-fold cascaded circuit.
· Total transformation ratio selectable as 1:7.7, 1:10 or 1:15 via taps.
· Maximum output voltage 15kV at possible load capacitances of:* 6nF with a pulse width of 73μs at a
repetition rate of 2.5kHz * 10nF with a pulse width of 103μs at a repetition rate of 1.25kHz
· Voltage divider 1:1000 in parallel.
· Overvoltage limitation at approx. 20-23 kV by parallel spark gaps
· Thermistor for overtemperature detection in the 1st transformer stage.
· Ground-side current measurement socket 100 mV/A.

Breakdown detection, testing

· If the maximum bridge currents for the transformer drives or the maximum currents of the bridge power supplies are exceeded,
the high voltage is switched off.
· The device has a resettable operating hour counter to determine the test time.

Manufacturer's price approx. 59,500,-€

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