与传统的继电器控制比较，PLC控制降低了实习成本，增强了教学效果，提高了学习效率。
Compare with the traditional control with the relay, the PLC control lowers the practice cost, enhances the teaching effect, and increases the study efficiency.
通过对LOGO与继电器控制进行比较，说明采用LOGO控制模块具有优越性和较好的价格比，以及在类似工程中应用前景。
Through the comparison of LOGO and relay control, it's clear that LOGO control module has superiority and better price and application prospect in similar engineering.
本文提出了电力变压器内部相间故障的分析方法，比较了距离继电器及其他后备保护在此故障时的灵敏度。
In this paper the method of analyzing the phase-to-phase faults in power transformers is presented. The sensitivities of distance relays and other back-up protections during the faults are compared.
在工业环境下，比较PC和继电器系统以及通用微机系统的适用性。
The industrial applicability of PC is compared with that of bang-bang control systems and general microcomputers.
本文就这几种差动继电器原理和特点进行分析和加以比较。
Their principles and characteristics are analyzed and compared in this paper.
尽管在比较激励时间时这类继电器是最快的切换元件，但释放或关断时间却比较长。
Although these are the fastest switching elements when actuation times are compared, the release, or turnoff time, is long.
设计了一个由微波发射器、555定时器、电压比较器和继电器组成的具有延时功能的自动报警器。
The paper designs an automatic alarm with the time delay function which composed by the microwave launcher, 555 timers, the voltage comparator and the relay.
双限继电器包含两个比较器和一个电位器，在一个单一的机电继电器下运行。
Dual limit relays contain two comparators and potentiometers operating into a single electro - mechanical relay.
介绍了SIEMENS逻辑模块LOGO在行车抓斗电控中的运用，并将LOGO控制与直流继电器控制进行了比较。
Application of SIEMENS logic module LOGO on bucket electrical control in overhead crane driving was introduced.
介绍了SIEMENS逻辑模块LOGO在行车抓斗电控中的运用，并将LOGO控制与直流继电器控制进行了比较。
Application of SIEMENS logic module LOGO on bucket electrical control in overhead crane driving was introduced.
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