The ICLAMP Current Clamp is designed for measurements of AC currents up to 1000 A with a 1000:1 step-down ratio.

The current clamp offers excellent accuracy (0.3% error at full range) and small phase shift (0.7 degrees at full range) so it can be used for metering of power, energy and power quality applications.

Such high performance is achieved because the magnetic cores are made from high-permeability Ni-Fe alloy.

The rated terminating resistance (burden) of 1 ohm must be provided by the instrument connecting to ICLAMP.

The output terminals of ICLAMP are protected with a voltage limiting circuit ensuring a safe-to-touch voltage under all rated conditions. ICLAMP is rated to CATIV 600 V, according the international standard IEC 61010.

Applications

The ICLAMP is a non-contact current sensing clamp which is simple to use and has application with the following instruments:

Power quality analyzers

Oscilloscopes

Motor testers

Clamp enabled earth testers

Attached Rod Technique (ART)

Stakeless testing

Data loggers

Digital multimeters

Clamp Usage

The ICLAMP is intended to clamp around a single phase of the asset to be tested and not phase + neutral because this would yield an incorrect result as a consequence of current flowing in opposite directions. Try to keep clamps separate wherever possible to improve quality of multiphase current measurements.

An ammeter measuring up to 1 A can be connected directly to the ICLAMP. A current of 1000 A will result in the ammeter reading 1 A (1000:1 step down ratio).

The ICLAMP generates 1 mV output signal across 1 ohm burden resistance for every 1 A of primary current, so if using a multimeter, one with a mV AC range is required. Dedicated earth tester instruments like Megger’s DET3TC, DET4TC and DET4TCR will need to ensure the input resistance and measurement circuitry are appropriate for the 1 mV – 1 V input range and a primary current limit of 20 A.

If using a TRMS multimeter the voltage reading will be TRMS because of the accuracy and crest factor performance of the ICLAMP.