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Power modules designed for simpler energy monitoring

Posted: 13 May 2011 ?? ?Print Version ?Bookmark and Share

Keywords:power modules? energy monitoring? energy management?

Enhancements to Opto 22's SNAP I/O power monitoring modules have given consumers broader voltage input ranges and better resolution for their three-phase power monitoring and energy management applications.

The new SNAP-AIPM-3 and SNAP-AIPM-3V can each monitor 480 VAC, three-phase electrical equipment without the need for a potential transformer. Both modules accept voltage inputs of up to 300 VAC, allowing 277V line-to-neutral signals from lighting systems and other equipment to be wired directly to the module. Eliminating the need to use potential transformers to step down higher voltages significantly reduces installation cost and complexity.

In addition, the SNAP-AIPM-3 now accepts current inputs from 0-5 amps C an improvement that doubles the module's current input resolution to allow consumers to observe changes in their power usage in higher detail. The device is compatible with common current transformerswhich step down a primary current to a secondary of five amps or lessmaking engineering unit conversion and scaling for the SNAP-AIPM-3 much easier.

In energy monitoring applications, the SNAP-AIPM-3 and the SNAP-AIPM-3V, which are available at a list price of $495 each, allow building managers, maintenance engineers, and other business stakeholders to monitor three-phase equipment power in their facilities.

Each module returns up to 14 channels of data including volts, amps, volt-amps, and true power for all three phases, plus true power sums. The modules can be used as part of a SNAP PAC System to correlate their energy usage with specific business operations and to generate real-time data which can be used to identify specific problems and design energy management initiatives to reduce energy costs.

System integrators can also use the modules to develop control systems and solutions that would allow commercial and industrial consumers to monitor and regulate their three-phase power consumption so they can reduce energy usage, avoid peak pricing charges and lower energy costs.

For original equipment manufacturers (OEMs), the modules provide a simple and straightforward method for integrating power monitoring and energy consumption into their machine control, establishing an important differentiator in their offering.

For its six-wired input channels, the SNAP-AIPM-3 has input ranges of 85-300 VAC RMS and 0-5 AC amps RMS and offers 12mV of resolution with accuracy of 0.2V for voltage inputs, and 200 microamps of resolution with accuracy of 4 milliamps for current inputs.

The SNAP-AIPM-3V's six-wired inputs have input ranges of 85-300 VAC RMS and 0-0.333 VAC from current transformers with a 333mV secondary with an accuracy of 0.2V for voltage inputs and 13.3?V AC for current inputs.

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