Three Phase Rogowski Coil Current Transformer

A rope, not a ring. The coil fits panels, wire bundles and irregular bus where a solid or split core simply will not go, and because there is no magnetic core there is no saturation to design around.

Input current range0 to 10000 A
Output0.333 Vac, 100 mV per 1000 A, or 0 to 5 Vac
Bandwidth1 Hz to 1 MHz
Accuracy≤ ±1 %
Response time< 10 ms
Auxiliary power supply6 to 12 VDC
Coil length≤ 2 m
Operating temperature-20 °C to 55 °C

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Product Overview

The flexible Rogowski coil current transformer series is designed for easy integration in a variety of applications and systems. The rope like coil allows it to fit into any constrained spatial configuration ranging from panels, wire bundles or irregular sized bus where a regular solid core CT or split core CT cannot be used.

The split design permits non contact AC current or current pulse measurement without requiring that the primary conductor be taken offline and disconnected for the current sensor installation. This method provides for safe, easy and portable measurement of current.

A current sensor based upon the Rogowski coil principle offers significant advantages over the standard magnetic core current transformer. Specifically, since the sensor does not incorporate a magnetic core, magnetic core saturation is avoided.

Application Scenarios

Power quality and harmonic measurement
Switchgear retrofit and protection
Generator, UPS and large drive monitoring
Portable current measurement

Technical Features

Fits panels, wire bundles and irregular bus where a rigid core cannot
No magnetic core, therefore no saturation
Non contact installation without taking the conductor offline
LED status indicator

Specifications

Rated performance

Parameter	Value
Rated current (rms)	10 A to 100 kA
Output	mV without integrator, 0-5 V AC with integrator
Power supply	9 V to 24 V
Coil length	20 cm to 200 cm
Tube	UL material
Wire lead	Shielded cable
Isolation voltage	3500 V
Operating temperature	-25 °C to +70 °C
Frequency	50 Hz to 60 Hz
Accuracy	±1 %

Coil dimensions

Dimension (mm)	RS-210	RS-350	RS-420	RS-510	RS-600	RS-800
A window size ±10 %	60	103	125	155	180	245
B coil outside diameter ±10 %	73	120	141	171	201	266
C Rogowski coil diameter	6.5	8	8	8	10.5	10.5
D wire lead diameter	4	4	4	4	4	4

Full specification

Parameter	Value
Input current range	0 to 10000 A
Output	0.333 Vac, 100 mV per 1000 A, 0 to 5 Vac
Bandwidth	1 Hz to 1 MHz
Accuracy	≤ ±1 %
Response time	< 10 ms
Auxiliary power supply	6 to 12 VDC
Coil length	≤ 2 m
Status indicator	LED light
Storage temperature range	-40 °C to 70 °C
Operating temperature range	-20 °C to 55 °C
Storage humidity range	10 % to 90 % without dew
Operating humidity range	10 % to 90 % without dew

Real Product Photography

Three Phase Rogowski Coil Current Transformer Gallery

Split core flexible Rogowski coil with high frequency 0-5 V output

Three phase 3000 A Rogowski coil set in three colours

1000 A 0.33 V CE and RoHS approved Rogowski coil

FAQ

Questions Buyers Ask

Why does a Rogowski coil not saturate?

There is no iron in it. Saturation is a property of a magnetic core, and a Rogowski coil is wound on a non magnetic former, so the output stays proportional right through a fault.

Do I need an integrator?

The raw coil output is proportional to the rate of change of current, so it must be integrated to give current. Coils are supplied with mV output for instruments that integrate internally, or with an integrator giving 0-5 V AC or 0.333 V.

How accurate is it?

±1 % with a conductor position sensitivity of ±2 % maximum. Keeping the conductor near the centre of the loop and closing the coil properly is what keeps you at the good end of that range.

Which coil length do I need?

Coils run 20 cm to 200 cm. Pick a length that closes comfortably around the conductor bundle without leaving a large loop of slack.