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CTS Series - Modular System Components

Note: Specications are subject to change without notice. Specications are warranted over an ambient temperature range of 25°± 5° C. Unless otherwise noted, specications are per phase for a sinewave with a

resistive load and apply after a 30 minute warm-up period. For three phase congurations, all specications are for L-N. Phase angle specications are valid under balanced load conditions only.

AC Power Source

Available in a choice of power levels ranging from 1250 VA to > 45,000

VA, the CTS Systems covers the complete range of single and three

phase products that require testing to conform with existing and

pending IEC standards. All iX Series AC sources meet IEC requirements

for low voltage distortion and oer arbitrary waveform generation,

precision measurements, and waveform analysis capabilities. Ac-

tual AC Source voltage distortion is measured in real-time during the

harmonics test and any distortion that could aect the test results is

clearly indicated.

All iX Series based CTS systems support full compliance testing for

several IEC 61000-4 AC immunity standards as well (certain options

may be required, see ordering information for details).

Direct PC Data Acquisition

A high-speed digital signal processor based data acquisition system is

used to implement the required IEC compliance measurement system.

Direct access to the PC bus ensures a much higher data throughput

capability than typically found in single box IEC test systems that use

either the IEEE-488 instrumentation, USB, LXI or RS-232 bus to com-

municate between the analysis instrument and the PC.

This high-speed acquisition system architecture stores raw data to the

hard drive and oers several features. It not only possesses the ability

to support future versions of test standards by merely installing new PC

software but it also greatly reduces the risk of product obscolescence as

test standards evolve. Furthermore, since the data is streamed to hard

disk in real-time, a complete data record is created each time which

may be used for audit purposes, data replay and further analysis or to

prove compliance to all the measurement requirements specied in

the test standard.

A special signal conditioning and isolation unit is used to provide

quick and easy connection between the AC source output and the

Equipment Under Test. This unit provides the required isolation, signal

conditioning and anti-alias ltering for the measurement system. The

equipment under test can be plugged in the front panel mounted

European style outlet (single phase systems only), or wired to a rear

panel mounted terminal block.

Harmonics Analyzer

A key part of the CTS system is the IEC compliant power analyzer which

provides detailed information on both voltage and current. Measure-

ments of both harmonics and interharmonics are made in real-time

with no measurement gaps to fully conform to the latest revision of

the IEC 61000-4-7 test standard. AC source voltage and EUT power are

monitored continuously during the entire test. Voltage distortion and

current harmonic data is checked against IEC class limits for pass or fail

detection. Comprehensive test reports can be generated easily.

Test limits are retained in a password protected database and can be

updated if needed in the future without the need to change software.

Other software changes as a result of changing IEC harmonics stan-

dard can be accomplished by simply installing new PC software. No

harmonics testing software resides in system rmware which would

require more costly eld upgrades.

Flicker Reference Impedance

An IEC61000-4-15 compliant icker meter is an integral part of the

CTS software. The required IEC 60725 compliant reference imped-

ance is implemented in the iX Series AC Source using programmable

output impedance. Programmable impedance oers improved ac-

curacy compared to a lumped reference impedance and the ability to

support dierent national standards without the need to switch out

lumped reference impedance hardware. A good example is testing

for compliance with the Japanese harmonics and icker standard,

which requires dierent impedance values to be programmed as

compared to the European test standard.

Optionally, a lumped impedance compliant with IEC 60725 or the Z-test

specication of IEC61000-3-11can be ordered for single or three phase

iX Series based CTS systems. For three phase CTS systems, a lumped

impedance option is recommended. The software can be congured

to use either impedance type during icker testing.

Model 15003iX-CTS 15 kVA three phase

test system shown in optional Cabinet

The 751iX/1501iX and 10001iX based CTS

versions and MX45-3Pi-CTS systems do not

support programmable impedance and

require option -LR2, LR4 or OMNI-3-75i for

icker testing.

The 1251RP-CTS system comes standard with

a lumped impedance which is integrated in

the PACS-1RP.

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