黑启动初始阶段，小系统空载运行的情况下，由于逆功率保护而往往发生机组并车失败问题。
When a small system is in on-load operation in the early stage of black start, unit paralleling may fail due to reverse power protection.
保护电路对于VVVF系统的可靠性、延长装置的寿命及避免功率管损坏都起到决定性作用。
The protection circuit is playing the decisive role in the reliability of VVVF system, lengthening the life of the installment and avoiding the power tube broken.
为了完善通信系统的性能，除了主干电路外，还必须加入一些附加电路，如自动功率控制电路、自动温度控制电路和保护电路等等。
But to perfect the system performance, some accessorial circuits are necessary, such as automatic power control circuit, automatic temperature control circuit and protective circuit etc.
该系统包括恒流源、光功率反馈、保护电路、温度控制等部分。
The system is composed of stable current source, light power feedback, protection circuit, and temperature controller.
本文对如何提高微机接地保护或自动选线装置的动作成功率，进行了比较系统和详细分析，提出了具体建议。
The paper analyzed in detail that how to improve the motional success rate of grounding protection or automatic line selection device, and gave the concrete Suggestions.
功率器件采用智能功率驱动模块，其内置的保护电路大大提高了系统的可靠性。
The Intelligent Power Module is been used for power instrument, its inner protect circuit raise reliability of the system.
数字的传输系统需要的发射功率可以很小，这将有利于节约能源和降低电磁的污染，能保护与改善环境。
Digital transmission system transmitting power needed can be very small, which will help save energy and reduce the electromagnetic pollution, to protect and improve the environment.
该系统可以测量电机的电压、电流、功率因数、功率、温度、转矩和转速，能够对电机参数进行快速准确地测定分析，用于电机的控制和智能保护。
The system can be adopted to measure electrical machine parameter quickly and accurately as well as analyse measuring data, so it can be used in electrical machine control and intelligent protection.
通过对大功率集成门极换向晶闸管(IGCT)高压变流器的结构、控制系统、保护系统的研究，设计出一套7。
Through analyzing the topology, control system and protection system of large power high voltage converter equipped with integrated gate commutated thyristor (IGCT), a set of 7.
超声波的空化作用能够抑制藻类生长，从保护水体生态系统以及超声波技术本身的特点考虑，低频率、低功率的超声波更适合于水体抑藻应用。
Consider of water ecosystem protection and characteristics of ultrasonic technology, low frequency and low power ultrasonic especially suit to control algal growth in water body.
通过将功率差动保护与其他保护的配合使用，在实际系统中可以达到比较理想的结果，具有较大的实用价值。
Working with other protection methods, power differential protection is proved to be ideal by experiments, shoving a great useful value.
系统主回路含三相全波整流桥电路，三对IGBT功率管组成的逆变器电路，制动电路及保护电路等。
The main loop includes a three-phase bridge, an inverter module with three IGBT power tubes, a braking circuit and protecting circuits, etc.
系统主回路含三相全波整流桥电路，三对IGBT功率管组成的逆变器电路，制动电路及保护电路等。
The main loop includes a three-phase bridge, an inverter module with three IGBT power tubes, a braking circuit and protecting circuits, etc.
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