CIS Current Integrated Sources

CIS Current Integrated Sources

  • Broad range of output currents and allowable loads
  • High stability and low harmonic distortion
  • Multilevel protection system
  • Harmonics generation capability up to the 50th

The CIS current integrated source was designed to provide a stable alternating current source for the electricity meter test equipment, and in laboratories. The output current is isolated and independent from the mains voltage. Different CIS versions are available depending upon the values of output power and output current required.


The power stage of the source utilizes Power Width Modulation (PWM) technology, which ensures high efficiency and thus results in very small thermal losses. The stage is driven by an onboard Digital Signal Generator (DSP). The control signal can create harmonics with independently defined amplitudes and phases. The internal feedback loop utilizes DSP technology, while advanced algorithms ensure high stability of amplitude and phase angle, as well as low distortion of the output current over a full range of allowable loads of various characters.

A multilevel protection system protects the source from overload, open circuit, overheating and makes operation of the device reliable and safe.

The CIS is equipped with an isolated serial interface and can be operated from a PC or other controlling device (host). A variety of sources can be synchronized and operated together to form a poly-phase system. The communication protocol is provided to control output settings as well as to access all internal registers.

The CIS current integrated source is housed in a 19 inch plug-in case.


Standard version of the CIS current integrated source is able to generate harmonics up to the 21st order. The enhanced harmonics version of the CIS source, marked with H, can generate harmonics up to the 50th.

CIS modelCIS-600
Output power for linear loads600VA1600VA3000VA3600VA2400VA
Output current range1mA … 120A (1)1mA … 200A (1)
Technology of the power stagePWM with digital feedback loop
Output current stability≤ 0.005% (time base: 150 s)
Total Harmonic Distortion (THD)< 0.3% (typical <0.1%)
Output power stage efficiency> 85%
Frequency40 … 70Hz
Phase angle0° … 360°
HarmonicsStandard versionup to the 21st , user programmable
H versionup to the 50th , user programmable (2)
CommunicationIsolated RS-422/RS-232

(1) Other values are available upon request.
(2) Fulfills Chinese standard JJG 597-2005.

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