Pulsgenerator til isolationstest

GBS Elektronik rev3 Isolationstests bis 6nF

GBS test impulse generator rev3 for long-term insulation testing

The Prüfpuls system is designed for long-term insulation testing of test specimens with a capacitance of up to 6 nF.

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 adjustable from 0-600V, Imax=2.6A, maximum output 1.3kW
· Pulse current limitation: 110A (cut-off threshold)

Pulse transformer – control

· Full-bridge control
· 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 the load capacitance and voltage.
· Pulse repetition frequency 0.1 – 2.5 kHz, adjustable.
· Polarity: Selectable positive, negative, or alternating depending on sine signal polarity.
· Cosine pulse at transformer output

Pulse transformer cascade

· Output transformers in 5-stage cascaded configuration.
· Overall 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 and a repetition frequency of 2.5kHz * 10nF with a pulse width of 103μs and a repetition frequency of 1.25kHz
· Voltage divider 1:1000 in parallel.
· Overvoltage protection at approx. 20-23kV via parallel spark gaps
· Thermistor for overtemperature 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, the high voltage is switched off.
· The device has a resettable hour meter to record test duration.
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Manufacturer price approx. €59,500

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