Compact power meter detects disturbance, captures waveforms


Schneider Electric ’s North American Operating Division, under the Square D brand, recently introduced PowerLogic PM870 power meter, the newest addition to the Series 800 PowerLogic power meter family. Designed for electrical installations with power-sensitive processes, the PM870 is said to combine accurate energy and power measurement with power-quality capabilities not typically found in a compact power meter.

The power meter can help facility managers establish and maintain LEED (Leadership in Energy and Environmental Design; U.S. Green Building Council) certification through measurement, verification, and reduction of energy consumption. It also can help to extend equipment life by evaluating equipment usage patterns, and improve system reliability by minimizing downtime through accurate detection and diagnosis of power quality disturbances. The meter provides disturbance detection and configurable waveform capture, for detecting, capturing, and troubleshooting current and voltage sags and swells that can disrupt sensitive processes. With zero blind-time metering, the it simultaneously monitors three phases of voltage and current accurately, even for fast-varying loads, such as welding applications.

It meets IEC 62053-22 and ANSI C12.20 Class 0.5S standards and helps track costs, allocate energy expenses, and sub-bill by department, area or individual process. The meter’s on-board logging memory prevents gaps in critical billing or troubleshooting data due to network outages or computer server downtime. Compact size (96 x 96 mm) and mounting depth of 70 mm make it suitable for installation in low voltage switchboards (even in shallow cable compartments), stand-alone machines, and a wide range of commercial and industrial applications. It mounts with two clips; no tools are required. In addition, the meter does not require potential transformers (PTs) in systems up to 600 V line to line. Field-installable input/output modules can be added at any time for monitoring of status points, and the energy monitoring of water, air, gas, electric, steam pulses, or other new functions. Backlit display is large and easy-to-read. It has standard RS-485 Modbus communications.

Headquartered in Palatine, IL, the North American Operating Division of Schneider Electric markets Square D, Telemecanique, and Merlin Gerin brand products to customers in the United States, Canada, and Mexico.

--Edited by Mark T. Hoske , Control Engineering editor in chief

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