EM TEST CWS 500N4 conducted common mode testing for electricity meters

The EM TEST CWS 500N4 comes in a compact single-box design and is designed to test for EMC immunity to conducted, common mode disturbances in the frequency range 0 Hz (DC) to 165 kHz. Such test requirements are specified in IEC 61000-4-16 and cover continuous mode testing as well as short-term testing with DC, 16 2/3 Hz, 50 Hz and 60 Hz with four test levels each and a sweep mode from 10 Hz to 165 kHz.

To address the risk disturbance currents between 3-150 kHz causing incorrect energy readings between photovoltaic inverters and measuring electricity meters subsequently feeding the wrong information to the grid, the CWS 500N4 can be used for testing electricity metering equipment as per TR 50579 and Draft standard IEC 61000-4-19, Annex C.

The CWS 500N4 consists of all the necessary parts to perform full-compliant tests as per IEC 61000-4-16, including the signal generator, the LF amplifier, a DC rectifier module, a semiconductor power switch and rms measurement of voltage and current, and is able to generate all continuous mode test levels up to 30 V (DC, 16 2/3 Hz, 50 Hz and 60 Hz) and the frequency sweep 15 Hz to 150 kHz without any additional external voltage source.

For remote control via the EM TEST ICD control software, both a GPIB and USB interface are available. The ICD control software supports the various test routines and can automatically generate a test report including all test data as well as a range of multiple interruption functions.

When manually operated, the user is offered the Quick Start test routine for easy and efficient testing of specific test points without software. Front-panel menu and function keys enable the user to program their test routines quickly and accurately. The cursor allows fast control of all test parameters of the programmed routine, thus test procedures are simplified and confidence is generated that every step is carried out correctly.