HF Series – Current Shunts – N4L

Test and Measurement

The HF series shunts provide an accurate current sensing solution for many wideband power measurement applications up to 500Arms, the shunts are supplied with a 2m safety BNC lead.

Utilising an innovative design unique to N4L that exhibits exceptionally low parasitic inductance, each shunt will maintain its specified resistance over a frequency range from DC to 1MHz without exhibiting the phase shift that is normally associated with high current resistive shunts.

While the HF series was primarily designed for use with the PPA series power analyzers from N4L that provide exceptional wideband accuracy, dynamic range and common mode rejection, the HF series can be used as a precise current sensing device for other equipment.

Model	Nominal Resistance	Continuous Current	PPA typical min Current	Input Connector
HF500	0.2mΩ	500Arms	0.5Arms	M16 bolt/lug
HF200	0.5mΩ	200Arms	0.2Arms	M10 bolt
HF100	1mΩ	100Arms	0.1Arms	M10 bolt
HF020	10mΩ	20Arms	10mArms	4mm socket
HF006	100mΩ	6Arms	1mArms	4mm socket
HF003	470mΩ	3Arms	0.2mArms	4mm socket
HF01A	1Ω	1.5Arms	0.1mArms	4mm socket

High Frequency Rogowski Current Transducers

AC sensing Rogowski current transducer designed for use with the PPA range Precision Power Analyser, enabling high frequency high accuracy current measurement.

Model	Measuring range	Frequency Range	Output Signal	oSpecificationo Data
WR5000	1A to 5kA	1Hz to 1MHz	1A=2mV/0.4mV
WR10000	100kW / 125 kVA	0-120V L-N / 208V L-L	350Arms / Phase

LEM High Accuracy Zero Flux Current Transducers

For ultra-high precision measurement of current: DC,AC,pulsed…, with galvanic separation between primary and secondary.

Features:

• Closed loop (compensated) current transducer using an extremely accurate zero flux detector.
• Electrostatic shield between primary and secondary circuit
• 9-pin D-Sub male secondary connector
• Optically insulated output (photocoupler type) indicates transducer state
• LED indicator confirms normal operation.

Model	Current Rating	Specification Data
LEM IT60-S	→ 60Adc/ pk 42Arms
LEM IT200-S	→ 200Adc / pk 141Arms
LEM IT400-S	→ 400Adc / pk 282Arms
LEM IT700-S	→ 700Adc / pk 495Arms
LEM IT1000-S/SP1	→ 1000Adc / pk 707Arms
LEM ITN600-S	→ 600Adc / pk 424Arms
LEM ITN900-S	→ 900Adc / pk 636Arms
LEM ITN1000-S	→ 1000Adc / pk 707Arms

Danisense High Accuracy Zero Flux Current Transducers

The Danisense range of Zero flux current measurement transducers, these current sensors based upon the Zero Flux measurement technique provide high accuracy current measurement up to 2,000Arms

Model	Current Rating	Specification Data
Danisense DS200	→ 200Arms
Danisense DS600	→ 600Arms
Danisense DS2000	→ 2000Arms
Danisense DSSIU-4	4 Channel Interface Unit

AC+DC Current Clamps

Our AC+DC Current Clamp range provide current measurement up to 5,000A (P50-3C) with an upper bandwidth of 5kHz (SC3C), these current clamps offer a convenient method of measurement for applications where the DC component of a signal is of particular interest. For example, these clamps are ideally suited to measurement of the DC bus in an inverter drive.

Model	Current Rating	Specification Data
SC-2C-100	1 → 100A
SC-3C-1000	1 → 1000A
P20-3C-2000	40 → 1000/2000A
P40-3C-4000	40 → 2000/4000A
P50-3C-5000	50 → 2000/5000A

AC Current Clamps

Our AC Current Clamp range provide current measurement up to 3,000A (P32-UE) with an upper bandwidth of 15kHz (SMUB), these current clamps offer an accurate measurement of an AC signal over a wide bandwidth. Typical applications include PWM Invert Driver output power measurement, transformer loss testing and a range of other AC applications. The wideband response of these current clamps is very flat well beyond the stated frequency range, these AC current clamps offer an ideal solution where cost and convenience must be accompanied with sufficient accuracy.

Model	Current Rating	Specification Data
M3-UB-50	100mA → 50A
M3-U-100	1 → 100A
S-UE-200	1 → 200A
S-UE-250	1 → 250/500/1000A
US-UE-1000	1 →
SM-UE-1000	0,5 → 1000A
SM-UB-1000	0,5 → 1000A
P32-UE-1000	5 → 1000A
P32-UE-3000	5 → 3000A

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