Power Meters ELF3234

The ELF3200 series power meter is a universal power meter. Before use, please program the SYS (measurement system configuration), PT and CT ratios through the front panel keys. Otherwise, it will read your system incorrectly.
Schneider Electric stands behind your ELF3200 power meters with complete user support and service. The ELF3200 power meter is designed for use in industrial and commercial installations by trained and qualified professionals, not for domestic use. Large electrical installations have high voltages and currents which may exceed the direct connection rating of the meter. In this case, potential transformers (PTs) and current transformers (CTs) are used to precisely step down or reduce the voltage and current level to suit the power meter rating. Potential transformers
usually have a full-scale output of 110 VAC RMS line-line and current transformers usually have a full scale output of 5 A or sometimes 1 A. The PTs (VTs) and CTs must be planned, installed, and tested by a qualified electrical contractor before wiring the power meter. The accuracy of the measurement also depends on the accuracy and phase-angle error of the PTs and CTs. Instrument class 1 or better PTs and CTs are recommended. Do not use protection class (10P10, etc.) CTs to feed the power meter. They have poor accuracy and phase characteristics.
Ensure that the CT Primary rating has been selected so that your normal load variation lies between 40% and 80% of its full scale. If your CT is over-rated, e.g., if the load is always less than 10% of the CT primary rating, then the accuracy suffers. On the other hand, if the CT is underrated, then you may exceed its full scale. As a result, both the CT and the power meter will burn out.