Watt Meter : TRUE RMS/REALLY BROADBAND The Model 2330 Sampling Volt-Ampere-Watt Meter is a precision, high accuracy, auto-ranging instrument which simultaneously measures and displays true rms Voltage, true rms Current and true mean Power over a frequency range from dc to more than 600kHz. Full scale Current and Voltage inputs are typically measured within ±0.1% of the reading in amplitude to at least 400kHz. The corresponding Power is typically measured to within ±0.1% of the input Volt-Amperes to 200kHz and to within ±0.2% of the input Volt-Amperes to 400kHz for loads of any Power Factor. http://www.clarke-hess.com/2330.html

Three phase watt-hour meter : D86 series three-phase watt-hour meter are induction meters which are applicable to measure the rated frequency 50Hz and power loss of active energy meter The series active energy meters are completely conformed to National Standard GB/T15283-94 and International Standard IEC521. All technical targets of reactive energy meter are completely conformed to National Standard GB/T15282-94 and Intermational Standard IEC145. http://www.denli.com/d86-english.htm

Watt-Hour Meter (PM-1000 Series) : TRIATEK's PM-1000 Series Watt-Hour Meter measures power in Watts-Hours and provides a pulse output proportional to energy consumption. Utilizing three current transformers and up to 480 volt service on single and polyphase power systems, the unit performs necessary factoring and math functions to calculate energy use in Watt-Hours. Watt-Hours are transmitted as a dry contact closure rated at 120V, 0.3A, -10VA maximum for remote control or monitoring applications. The standard Watt-Hour calculation factor is calibrated to output 5 watt-hours per count. However, to increase the pulses the unit can be ordered with other Watt Hour per count factors. The equation for determining KWH is the potential transformer ratio multiplied by the current transformer ratio multiplied by the Watt-Hour/Count ratio divided by 1000. For example, if there is no potential transformer and if the current transformer ratio is 600:5, and the Watt-Hour/Count is 5, then the KWH value per closure on the PM-1001 would be 0.6 KWH (600/5)*5)/1000. The PM-1000 Series Watt-Hour Meter is housed in a general purpose enclosure for mounting in a panel or on a flat surface. http://www.triatek.com/products/PM-1000.html

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