Trinity engineering is an indigenous provider of state-of-the-art equipment in power factor and power/energy management has brought in mercury electrical power meter which can be used three phase four wire electrical systems. The electrical power meter can measure phase voltages, currents, frequency, power factor, kva system, kw system and kvar system. The various parameters measured by the mercury electrical power meter are sequentially displayed on bright 7-segment display. The dip switch at the back is used for primary ct ratio programming at site and sixteen standard ct ratios are supported in 50/5 to 3200/5 range. The mercury electrical power meter uses a powerful micro-controller working at 16 mhz speed. The benefit of using this electrical power meter is that the voltage, current, frequency variation have almost no effect on the accuracy.The mercury electrical power meter comes with major advantages such as easy installation only three current and voltage inputs to be connected, economy of space and minimal wiring. The mercury electrical power meter are available with salient features such as multi parameter monitoring; replaces seven individual meters; class 1.0 accuracy for all parameters; compact 96 x 96 din enclosure; micro-controller base and ideal for supervision and audit of specific loads.