Compact energy meter is a power analyser too

3rd September 2007

ES Admin

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Carlo Gavazzi has created a new benchmark in energy meters, with the introduction of a compact 1DIN module that adds MID-compliant power measurement and control functions to active energy metering. The EM11-DIN is a single-phase energy analyser with built-in configuration push-button and LCD data display, providing both active and reactive energy metering, together with cost allocation functions.

Applications include energy cost sharing in public buildings, campsites, marinas, where the loads need to be controlled and monitored. Cost allocation for single-phase loads such as computers, domestic installations where warnings are required for imminent overloads, and energy metering for services such as server web hosting.

With direct connection up to 32A, the meter can provide either pulse output proportional to the measured active energy, or alarm control on one of the available instantaneous variables. It can control and limit power before switch-off of the whole electrical system occurs, even in domestic installations served by automatic breakers.

Measurement functions include: instantaneous variables (V, A, W, Wdmd, Wdmd max, var, PF, Hz); single phase variables (VLL, VLN, A, VA, W, var, PF); energy measurements such as total kWh and kvarh; and TRMS measurements of distorted sine waves (voltages/currents). Measurements are classified as Class 1 (kWh) according to EN62053-21, Class B (kWh) according to EN50470-3 and Class 2 (kvarh) according to EN62053-23. Accuracy is ±0.5 RDG (current/voltage) and the readout offers four-digit precision for instantaneous variables readout, 5+1 digits for energies.

The unit is self-powered for simple installation and housed in a 17.5mm wide rail-mounted enclosure, which is front-protected to IP40.