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Powertek CWT30B/4/500

CWT Standard Rogowski Coil, AC Current Probe / CT; Cable Length 4 m, Coil Circumference 500 mm

Model

CWT30B/4/500

Product Family

Oscilloscopes & Logic Analyzers

Manufacturer

Powertek

Configured models contain the following attributes:

Oscilloscopes & Logic AnalyzersCurrent Probes

Configurations

Key Specs

Product Overview

Resources

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Product Overview

The CWT current sensors are rugged clip around flexible coil wideband current probes, using Rogowski Coil technology for wide bandwidth measurement and faithful conversion of current to voltage, intended for use with oscilloscopes, data loggers, transient recorders, power meters and power analyzers - ideally suited for power electronic applications.

Based on the Rogowski principle, these probes have intrinsic high bandwidth performance allowing measurement of both small and large currents (1A-600kA) from 0.01Hz to 20MHz. The small coil profile (8mm dia), means the coil can be retrospectively installed without disruption to active power systems. As standard, the coil is insulated at 10kVrms, insulation can be increased if required.

Models are available with a variety of clip-around coil sizes to suit most conductors, allowing easy current monitoring even where access is limited.

The CWT is a state of the art wide bandwidth ac current probe. The CWT is ideal for power electronic development work because it combines an easy to use thin, flexible, clip-around coil with an ability to accurately replicate fast switching current waveforms be they sinusoidal quasi-sinusoidal or pulsed.

Key Features

Bandwidth 1Hz to 16 MHz (see bandwidth spec for each model)

CWT LF models available with extended LF bandwidth and low phase shift<1Hz

Models covering a 1A - 1200,000 Amps range

300:1 measuring range, example 300A CWT probe will measure 1A

0.2% accuracy

10kV Insulation capability

Optional Electrostatic screens

Flexible "clip-around" coil

±6V Instantaneous isolated output ideal for scopes, data loggers, PCI DAC cards and power analyzers

Uses 4 x AA batteries or 12V ac adapter (110V or 230Vac)

Traceable calibration certificate included

CE marked

Specifications
CWT
Feature	Parameter
Power Supply	All CWT units are supplied with four AA batteries (typical life 90 hours) and a 12V-24Vdc input socket A Universal Power adapter is included with the CWT probe (accepts 115Vac or 230Vac) Rechargeable batteries and internal charger, option R, is available. (batteries are charged whenever external +12-24V dc supply is present). Typical recharge time 40 hrs, typical life 8 hrs.
Integrator Box Dimensions (mm)	H =183mm, W = 93mm, D = 32mm
Output Socket	BNC (output impedance 50 ohms- unit supplied with 0.5m BNC-BNC coaxial cable)
Min. Output Loading	100kohm (for rated accuracy), 50ohm drive capability optional.
Temperature Range	0℃ to +40℃

Specifications
CWT Wideband Current Probe
High Sensitivity Ranges of CWT (measuring currents from 300mA)
Model	Sensitivity (mV/A)	Peak current	Peak di/dt (kA/uS)	Noise max¹ mV pk-pk	Droop typ. (%/ ms)	LF (3dB) bandwidth typ. (Hz) fL	Peak di/dt (kA/us)	HF (3dB) bandwidth typ. (MHz) fH² Coil Length 300mm	HF (3dB) bandwidth typ. (MHz) fH² Coil Length 700mm
CWT015	200.0	0.1A to 30A	0.2	6.5	130	150	2.0@6kHz	6	4
CWT03	100	0.2A to 60A	0.4	4.5	90	105	2.0@4kHz	10	6.5
CWT06	50	0.4 to 120A	0.8	3	70	80	2.0@3kHz	16	10
CWT1	20	1A to 300A	2	2.5	40	50	1.9@2kHz	16	10
CWT1N	20	1A to 300A	2	2	20	25	1.9@1kHz	10	5
CWT3	10	2A to 600A	4	8	3	3.5	1.0@300Hz	16	10
High Sensitivity Ranges of CWT (measuring currents from 300mA)
CWT3N	10	2A to 600A	4	14	0.9	1	1.7	10	5
CWT6	5	4A to 1.2kA	8	14	0.9	1	1.7	16	10
CWT15	2	10A to 3kA	20	7	0.7	0.8	1.3	16	10
CWT30	1	20A to 6kA	40	5	0.5	0.6	0.9	16	10
CWT60	0.5	0.04kA to 12kA	40	5	0.5	0.6	0.9	16	10
CWT150	0.2	0.1kA to 30kA	40	3	0.2	0.2	0.3	16	10
CWT300	0.1	0.2kA to 60kA	40	3	0.1	0.1	0.2	16	10
CWT600	0.05	0.4kA to 120kA	40	3	0.06	0.05	0.1	16	10
CWT1500	0.02	1kA to 300kA	40	3	0.035	0.03	0.06	16	10
CWT3000	0.01	2kA to 600kA	40	3	0.035	0.03	0.06	16	10
CWT6000x	0.005	4kA to 1200kA	40	3	0.035	0.03	0.06	16	10

Note:

¹ Distributed around the fL (3dB) bandwidth. Additional 50/60Hz noise of approximately 2mVpk-pk applies with AC 115V and 230V supplied CWT

² The high frequency bandwidth is in part dependent on coil length. The values given are for a 700mm coil, a 300 –or- 500mm coil will have a higher fH

Specifications
CWT
Model Overview
Model	Cable Length (m)	Coil Circumference (mm)	Example
CWT30B	2.5	500	order code = 6kApk, 4 AA Batteries, 12-24Vdc input, ac adapter, 2.5 metre cable, 500mm coil (Coil insulation is 10kV as standard)
CWT30B	4	300	order code = 6kApk, 4 AA Batteries, 12-24Vdc input, 230V ac adapter, 4 metre cable, 300mm coil
CWT6R	2.5	500	order code = 1.2kApk, 4 AA rechargeable batteries, internal battery charger, 12-24Vdc input, ac adapter, 2.5 metre cable, 500mm coil

Note:

All CWT current probes are supplied with;

bnc-bnc cable

12-24Vdc input

4 AA batteries

power adapter

user manual

calibration certificate

carry case.

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