Other characteristics, such as frequency, wave shape, and phase balance are seldom recognized by the consumers but are given constant attention by the electric power utility engineers.
而其它方面的特性，如频率、电压波形、各相平衡则很少被用户认识到，但这恰恰受到电力部门工程师们的时刻关注。
The directions of further research on the phase field method are aimed at better numerical arithmetic, more precise model, 3d quantitative simulation and utility.
以后进一步研究的重点方向是更优的数值算法、更精确的数值模型、三维定量模拟以及实用化研究。
The utility model discloses a phase interruption protective device for three-phase electric motor.
一种三相电机的断相保护装置。
It covers five aspects: supply voltage tolerance, utility harmonic, three-phase voltage unbalance, power system frequency tolerance, voltage fluctuation and flicker.
它涵盖五个方面：供电电压允许偏差、公用电网谐波、三相电压不平衡度、电力系统频率允许偏差、电压允许波动和闪变。
The utility model relates to a rectification tower in a liquid phase cascade, which belongs to the technical filed of isotope separating and rectifying facilities.
一种液相级联的精馏塔，属于同位素分离、精馏设备技术领域。
The utility model relates to an electronic quenching instrument, which can be used for measuring the cooling capacity of quenching mediums and the phase change time of work pieces.
电子淬火仪用于测定淬火介质的冷却能力及工件的相变时间。
The utility model provides an AC voltage stabilizing regulator, which synthetically utilizes the AC voltage phase control method and the amplitude control method.
本实用新型提供一种交流稳压调压器，综合利用了交流电压相位控制法和幅值控制法。
The utility model discloses an energy consumption braking circuit of a three-phase asynchronous motor, which is composed of a three-phase asynchronous motor and a main control contactor.
本实用新型公开了一种三相异步电动机能耗制动电路。它由三相异步电动机与主控接触器构成。
The utility model can cause that the power of a motor is cut off automatically, when the power of one phase of the three phase motor is cut off; therefore, windings are protected.
本实用新型可使三相电动机的一相断电时使电动机自动断电，从而保护绕组。
The utility model provides the infrared single-phase monitoring device.
本实用新型提供了一种红外光分相检测装置。
The utility model relates to a phase-failure protection, especially relates to an open-phase protector used in the electrical equipment.
本实用新型涉及一种断相保护装置，尤其涉及一种用于电气设备的断相保护器。
The utility model relates to a phase-failure protection, especially relates to an open-phase protector used in the electrical equipment.
本实用新型涉及一种断相保护装置，尤其涉及一种用于电气设备的断相保护器。
应用推荐