Ohio Semitronics - AC Current Transducers

Product Families

Electrical Current Measurements

Electrical Voltage Measurements

Electrical Power and Energy Measurements

Electrical Frequency Measurements

Multifunction Electrical Measuring Devices

4242 Reynolds Dr.
Hilliard, OH 43026

Phone:
(800) 537-6732
or (614) 777-1005
Fax: (614) 777-4511

Electrical Current Measurements
AC Current Transducers-Calibrated for RMS

Most OSI AC current transducers measure the average of the absolute value of the current measured. The output of the transducer is then calibrated for the RMS (root mean square) for sine wave input. This type of measurement design provides an inexpensive method of obtaining an isolated DC signal output proportional to the AC current measured. Typical OSI transducers that employ this design include the following direct measurement models:

Other Current Measurement Technologies

AC Current Transducers -
Calibrated for RMS

AC Current Transducers - True RMS

Hall Effect Current Transducers - Open Loop

Hall Effect Current Transducers - Closed Loop

Rogowski Coils

ACT

Features

Single phase, UL-listed, designed to withstand motor startup transients

Typical Applications

50/60 Hz single phase where low cost is primary consideration and installation requires UL/CUL or CE listed. Common installations include:

Monitoring of larger building fans
AC motors
AC conveyer belts
appliance production lines and testing

Input Range	Std.Outputs	Accuracy
0-1500Aac See spec sheet for individual model numbers and complete product specifications	0-1mAdc 4-20mAdc 0-10Vdc 0-5Vdc	±0.25% FS with internal sensor ±0.5% FS with external CT

3ACT

Features

Three phase, UL-listed, designed to withstand motor startup transients

Typical Applications

50/60 Hz, three phase where low cost is primary consideration and installation requires UL/CUL or CE listed. Common installations include:

Monitoring of larger building fans
AC motors
AC conveyer belts
appliance production lines and testing

Input Range	Std.Outputs	Accuracy
0-1500Aac See spec sheet for individual model numbers and complete product specifications	0-1mAdc 4-20mAdc 0-10Vdc 0-5Vdc	±0.25% FS with internal sensor ±0.5% FS with external CT

CTC

Features

Insensitive to polarity, easy to install. Cannot produce high voltage output if output is left open

Typical Applications

Where accurate 50-400Hz measurements are required. UL/CUL or CE listed. Common installations include:

motor
mining conveyer belts
larger cable but need an all in one device

Input Range	Std.Outputs	Accuracy
0-50Aac See spec sheet for individual model numbers and complete product specifications	0-5Vdc 0-10Vdc 4-20mAdc	±0.25% FS on 10-50Aac models ±0.5% FS on all other models

CTD

Features

Insensitive to polarity, easy to install. Cannot produce high voltage output if output is left open

Typical Applications

Where accurate 50-400Hz measurements are required. UL/CUL or CE listed. Common installations include:

motor
mining conveyer belts
larger cable but need an all in one device

Input Range	Std.Outputs	Accuracy
0-2000Aac See spec sheet for individual model numbers and complete product specifications	0-5Vdc 0-10Vdc 4-20mAdc 0-1mAdc	±0.5% FS

SCT

Features

Split-core design for easy installation. Accurate and reliable from 50-400Hz

Typical Applications

Where a split-core current transformer integrated with a current transducer is the best solution. UL & CUL listed. Common installations include:

Small Fans
motors

Secondary of current transformers, usually found inside panel feeding a second signal to devices other than control board.

Input Range	Std.Outputs	Accuracy
0-500Aac See spec sheet for individual model numbers and complete product specifications	0-1mAdc 4-20mAdc 0-5Vdc	±0.7% FS

MCT5

Features

Slim profile DIN-mount enclosure. Field selectable analog outputs

Typical Applications

Ideal for use in small enclosures with dimensional restraints. UL & CUL listed. Common installations include:

New installs in cabinets for monitoring as listed above
manufacturing production lines
(toasters, ovens, elements, hair dryers)

Input Range	Std.Outputs	Accuracy
0-1Aac and 0-5Aac See spec sheet for individual model numbers and complete product specifications	0-1mAdc 4-20mAdc Self-powered and loop powered units available	±0.25% FS @ 60Hz