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PEM Rogowski coil CMC015/CMC03/CMC06 mea PEM

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PEM Rogowski coil CMC015/CMC03/CMC06 measurement VDS medium-high-frequency current probe (37.5 A/75 A/150 A)
  • PEM Rogowski coil CMC015/CMC03/CMC06 measurement VDS medium-high-frequency current probe (37.5 A/75 A/150 A)

PEM Rogowski coil CMC015/CMC03/CMC06 measurement VDS medium-high-frequency current probe (37.5 A/75 A/150 A)

Brand: PEM

Origin: UK

Isolated Current Probe. Detailed specifications are available in the product datasheet.
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Downloads
PEM Rogowski Coil CMC Datasheet datasheet.pdf PEM Rogowski Coil CMC Datasheet datasheet.pdf PEM Rogowski Coil CMC Datasheet datasheet.pdf PEM Rogowski Coil CMC Datasheet datasheet.pdf ABB – 5 –.pdf ABB – 5 –.pdf PEM CMC II – Case-study-2.pdf PEM CMC II – Case-study-2.pdf PEM Rogowski Coil CMC I – Case-study-CMC-Probemart.pdf PEM Rogowski Coil CMC I – Case-study-CMC-Probemart.pdf PEM CWT Application Article High Performance Rogowski Curren PEM CWT Application Article High Performance Rogowski Current Transducers-W.F.Ray C.R.Hewson Probemart.pdf PEM Rogowski Coil - A Next-Generation Current Probe for High PEM Rogowski Coil - A Next-Generation Current Probe for High-Speed, High-Power Measurements -Chrise Hewson.pdf PEM CWT Accurate Measurement in High-Power Motor Power Conve PEM CWT Accurate Measurement in High-Power Motor Power Conversion Application -Probemart.pdf
Overview

PEM Roche coil CMC series

Roche probe

———————————————————————— used to measure high-frequency common-mode currents in VSDs


common-mode current issue:
variable frequency drives (VSDs) used to control AC motors generate very high frequency voltages, which may appear on the machine.
These voltages are the result of PWM voltage capacitive coupling, and the voltage on the shaft is sufficient to cause the arc current to flow through the motor bearing to the ground.
discharge current can cause the bearing raceway surface to heat up or even melt.
Damage caused by bearing current can lead to premature failure of the motor driver and costly maintenance and downtime

PEM developed a flexible clip-on current probe to measure these high-frequency common-mode currents, which flow through bearings in large AC drive systems through the motor to the ground. This probe is an improved version of our highly successful, industry-leading CWT Roche current sensor series.
CMC is an important tool for identifying common-mode currents and their severity in large motor drives. It is designed for experienced personnel with knowledge of AC drive systems. Once determined, CMC will provide engineers with reference measurements that can be dry-evaluated for the effectiveness



of measures taken to reduce bearing current————————————————————————

Features of the custom probe:

1. Electrostatic shielded Rogovsky coil, screen attenuation due

to unwanted interference caused by capacitive coupling from the local voltage source
2. A low-frequency (-3dB) bandwidth used to attenuate large fundamental power, frequency, current, and magnetic fields. This greatly increases the SNR

for measuring high-frequency bearing
current
3. High-frequency (-3dB) bandwidth=10MHz, coil circumference can reach 1m

4. Wide range of Rogowski coil sizes, suitable for the largest machine shafts



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Specifications
型号 灵敏度 (mV/A) 电流峰值  （A）

噪  声

max  

 (mVp-p)  

低频带宽3dB

（kHz）

Typical LF

（＜1%）bandwidth（kHz)

 Peak di/dt  (KA/µs) 低频带宽3dB（MHz）1m线圈
CMC015 200.0  37.5  4.0  19.0  50.0  4.0  11.0 
CMC03 100.0  75.0  4.0  6.0  15.0  8.0  13.0 
CMC06 50.0  150.0  4.0  1.9  5.0  16.0  14.0 


Expand PEM Rogowski coil CMC015/CMC03/CMC06 mea

* Specifications are subject to change without notice.