UK Design and manufacture of wideband current measurement transformers and wideband voltage measurement transformers

With a broadband terminated current transformer you can accurately measure current waveforms without electrical contact to the circuit under test. Lilco Ltd has taken advantage of the availability of new resistive and magnetic materials to manufacture a range of innovative terminated current transformers (sometimes termed current monitors or current probes). These instruments are capable of faithfully reproducing current waveforms for display on an oscilloscope or capture by a data logger without electrical contact being made to the circuit under test.

They are suitable for the measurement of both sinusoidal and irregular current waveforms. Whether your requirement is to measure capacitor discharge currents of thousands of amps, power semiconductor switching performance or milliamp  currents  in  LF or HF  circuitry,  one of  our terminated  current

 transformers can satisfy your requirements

The company also supplies a range of unterminated ring-type current transformers (cts) with good frequency characteristics.

These components can provide an economically attractive alternative to the terminated transformer for incorporation into commercial production equipment. Some models are suitable for current injection.

Electrical isolation combined with high precision

- ideal for power electronic device and circuit development

APPLICATIONS

• Accurate measurement of turn-on, turn-off and conducting performance in power semiconductor switches

• Switchmode power supply design

• Development and servicing work in power electronics

• Lightning simulation testing of surge arrestors

• Capacitor discharge surge testing

• Motor controller and electronic variable speed drive development

• Monitoring of laser tube and diode pulse currents

• Measuring harmonics in mains power cables and for EMC testing

• Testing to EN61000-4-1 peak inrush current

• Current injection

Updated    December 2018

PROPERTIES

• Electrical isolation from circuit under test

• Waveform components from 0.1Hz to 100MHz

• Currents from 10mA to 50,000A

• Accuracy to 1%

• 50 ohm output impedance

• Sensitivities from 0.01V/A to 1V/A

• Passive device requiring no power source

• Minimal phase shift over bulk of operating frequency range

• Negligible insertion resistance

• Excellent reproduction of rectangular, pulse, sine and other waveshapes