The power frequency voltage withstand test and the simulated brushing test show that the robot has great insulating ability and good application prospects.

工频耐压试验和模拟带电清扫试验表明，关节式带电清扫机器人有良好的绝缘性能，并具备了明朗的应用前景。

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The discharging properties of air gap in natural ambience with different conditions under power frequency voltage and lightning impulse voltage are studied.

通过对该避雷器进行大量的雷电冲击放电试验，确定了间隙距离和安装位置。

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The testing voltage of the secondary winding of transformer has to be 80% stipulated testing voltage while repeated power frequency voltage with-stand test needed.

互感器一次绕组的重复工频耐压试验应在规定试验电压值的80%下进行。

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Power-saving techniques and voltage and frequency "slewing" will allow its chip to lower electricity consumption by up to 50%.

FORBES: Magazine Article

In addition, by monitoring the frequency or voltage of the power grid, the platform provides automatic demand response when grid conditions call for it.

FORBES: University Launches World's Largest CO2 Emissions Tracking Portal

By monitoring the line voltage, frequency and power factor, you can check the quality of the electricity you are being charged for and yell at the utility for delivering a shoddy product if it is below specification (not that it will do you any good).

ECONOMIST: The much-talked-of smart grid prepares to enter the home