Current Amplifier CL309-I

The meter test system consists of one or more switch mode current amplifiers. Test current is synthetically generated in a digital electronic power source with a controller and switch mode amplifiers. The amplifiers have the following characteristics:

  • high efficiency ( ≥ 85 %)
  • power factor compensation of the mains connection according to EN 60555 / IEC 555
  • high stability at inductive-, capacitive- and non-linear loads
  • very high quality of the output signals, low total harmonic distortion (THD)
  • protection against overload, open circuit, over-temperature

The amplifiers are digitally controlled and have internal measurement modules for additional stabilization of the output values.

Specifications for current amplifier CL309-I

ItemValues
Test current1 mA … 120 A
Current ranges10 mA, 25 mA, 50 mA, 100 mA, 0.25 A, 0.5 A, 1 A,
2.5 A, 5 A, 10 A, 25 A, 50 A, 100 A
Adjustment0 % … 120 % of range
Accuracy of the test amplitude0.05 %
Accuracy of the test phase adjustment0.01°
Efficiency> 85 %
Stability of the output settings< 100 ppm, Ti = 100 s
Distortion< 0.5 %
Superposition of harmonics2nd… 21st, max 40 % of fundamental
Harmonics phase shift0°… 359.99°
Output power1,600 VA (optional 2,500 VA)
Frequency45 … 65 Hz
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Published by

Lao Ren

more than 30 years experience in energy metering Product Director Shenzhen CLOU Electronics

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