Pulsgenerator for isolasjonstest

GBS Elektronik rev3 Isolationstests bis 6nF

GBS Test Pulse Rev3 Pulse Generator for Long-Term Insulation Tests

The Prüfpuls setup is designed for long-term insulation testing on test specimens with up to 6 nF capacitance.

Converter for High-Voltage Test Transformer

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

Pulse Transformer – Control

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

Pulse Transformer Cascade

· Output transformers in 5-stage cascaded configuration.
· Total transformation ratio selectable via taps: 1:7.7, 1:10, or 1:15.
· Maximum output voltage 15kV for 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
· 1:1000 voltage divider in parallel.
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· Overvoltage protection at approx. 20-23 kV via parallel spark gaps
· Thermistor for over-temperature detection in the first transformer stage.
· Ground-side current measuring socket 100 mV/A.

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Breakdown Detection, Testing

· If the maximum bridge currents for the transformer control or the maximum currents of the bridge power supplies are exceeded, high voltage is switched off.
· The device features a resettable hour meter to record the test duration.

Manufacturer price approx. €59,500

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