Power Metering, Large and Small
Staff -- Consulting-Specifying Engineer, 7/1/2004 1:00:00 AM
Whether one is talking about compact, hand-held electrical meters and testers or large-scale sub-mettering systems for entire facilities, the monitoring and metering of electrical power is essential these days. Not only is electrical power monitoring crucial to ensure power quality, but it's also an important component of energy management these days. In keeping with the energy-efficiency theme of the issue, this month's Product Spotlight describes a wide assortment of electrical metering devices.
Phase-monitoring relay detects under-voltage and im-proper phase sequence or phase loss. In the vast majority of three-phase applications, it is critical to know if all phases are present, and have the right se-quence and right voltage. With a DIN-rail-mount housing of just 17.5 mm, the units also provide a relay-type output that can be set as NC or NO. (DPA53 by Carlo Gavazzi)
Smart meter is a pocket-sized voltage, continuity, resistance and current tester that is said to bring a new level of convenience and safety. The unit combines a basic electrical tester with the advanced capabilities of a clamp meter. With a broad measurement range and Cat IV 600-volt safety rating, it is suitable for commercial and industrial environments. (Split-Jaw by Ideal)
Energy-management software is designed to help large users reduce energy-related business risks by controlling energy and operations costs, enabling better procurement strategies and maintaining reliability. Optimized for commercial office and retail property applications, the sofware offers key performance indicators, plus benchmarking, forecasting and control capabilities. (ION EEM by Power Measurement)
Load-profiling meter now features two new optional enhancements. A Form C relay provides programmable high and low setpoints for alarming and control functions with adjustable ramp and dwell times to limit nuisance trips. A net-metering option allows users to determine net power by measuring energy delivered by a power source or utility. (by E-Mon)
Circuit-breaker metering is designed for space-constrained areas. The units are especially well suited to small equipment closets commonly found in multi-floor office buildings, retail shops, dormitories, apartment complexes, high-rise condominiums, multi-family/retail mixed developments and military housing. Units provide five meter/circuit-breaker positions for single phaseout service in 17.5 in. of wall space. (Powerpact Q-Frame by Square D)
Clamp Meters
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07/01/2009Getting the Most from Monitoring
05/31/2006
