GBS Prüfpuls rev3 pulse generator for long-term insulation testing up to 6 nF

GBS Elektronik rev3 Isolationstests bis 6nF

GBS Prüfpuls rev3 Pulse generator for long-term insulation tests

The Prüfpuls unit is designed for long-term insulation tests on test specimens with a capacity of up to 6 nF.

Converter for high-voltage test transformer

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

Pulse transformer – drive

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

Pulse transformer cascade

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

Breakdown detection, testing

· If the maximum bridge currents for the transformer drive 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.
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Manufacturer's price approx. €59,500

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