此方法能有效、直观地对直流保护测控装置的功能进行定量测试。
This method is proven to be effective and intuitive to carry out a quantitative test of the protective functions.
随着城市地铁的大力发展，研制更加完善的直流保护正是应时之需。
With the rapid development of subway, it is necessary to consummate the protection for DC traction power supply system.
模拟输入：DC额定电压为0-10，24伏直流保护，以最大限度，输入阻抗20千欧姆；
Analog Input: Rated for 0-10 Volts DC, protected to 24 Volts DC maximum, input impedance 20k ohms;
该工程系统研究、主设备制造，阀控、站控，直流保护设备研制，安装及调试全部由国内单位承担。
The system study, manufacture of main equipment , development of valve control, station control, DC protection, installation and commissioning have all been undertaken by domestic organizations.
先进的电子设计提供了诸如操作许多功能，从5月26日伏直流电源，短路保护，输出和EMI噪声阻力。
Advanced electronic design offers many features such as operation from 5-26 volts DC power, short circuit protected outputs, and EMI noise resistance.
他们是可靠的保护，防止过热，过载，短路以及高频率和输出直流。
They are reliably protected against overheating, overload and short-circuits as well as high frequency and DC at the output.
高压直流输电系统中最关键的部分是控制保护部分。
Control and protect section is the most pivotal section in HVDC system.
在女性14例输出短路保护和经营5伏直流电源。
The F14 outputs are protected from short circuits and operate on 5 VDC power.
运行实践表明，通过对蓄电池的自动充电和智能保护，延长了蓄电池的寿命，提高了直流系统运行的可靠性。
As has been proved that automatic charge and protection of the storage cell can extend its life, then improve the reliability of the DC system.
输出受到保护，短路，和操作5或12伏直流电源。
Outputs are protected from short circuits, and operate on 5 or 12 VDC power.
直流供电的控制和保护系统对确保轨道交通的安全、可靠的运行，具有举足轻重的作用。
The control and protection system in DC power distribution systems plays a very important role in ensuring the mass transit railway safe and reliable operation.
文章介绍了直流电机控制柜输出端的保护方法，并对电路进行原理分析。
This paper introduces the protecting methods of the output end of DC motor's control cabinet, and analyzes the principle of the circuit.
控制和保护回路模拟信号的电压都低于24V直流。
The voltage of the analog signals in control and protection circuits are all below DC 24V.
地铁直流供电的保护与控制系统对确保地铁的安全可靠运行起着关键作用。
The protection and control system in subway DC power supply systems play a key role in ensuring the safety and reliability of the subway.
直流变交流，准正弦波。全自动保护，安全可靠。体积小，重量轻，效率高。无污染，免维护，使用方便。
DC Variable AC, quasi-sine wave. Automatic protection, safe and reliable. Small size, light weight and high efficiency. Pollution-free, maintenance-free, easy to use.
在简要介绍直流接地过流保护原理的基础上，分析了换流变阀侧接地故障的故障特征以及换流阀换相过程对故障电流的影响。
By employing the DC earthed protection theory, this paper analyzes the characteristics of the converter transformer earth fault and the influence of converter commutation.
用此方法对一个直流电机数字控制调速系统进行堵转保护。
It can be used to provide blocking protection to a specific DC motor speed control system.
对近期提出的克服电网分布电容影响小电流接地选线的零序直流选择性保护原理作了理论分析。
This paper analyses the existing zero sequence directive current selective leakage protection principle which is to surmount the effect of distributed capacitance on it.
介绍了地铁直流牵引供电系统框架泄漏保护的优化设计方案。
This paper mainly introduces an optimum design scheme for the frame leakage current protection of DC traction power supply system in metro engineering.
控制保护系统的运行情况直接影响着直流输电系统的安全稳定运行。
The stable and secure operation of an HVDC transmission system is influenced by the operating performance of its control and protection system.
短路故障模型的仿真结果表明机车起动电流和远端短路电流的相似会对直流馈线保护造成影响。
Short-circuit fault model simulation results show that the locomotive starting current is similar to the remote short-circuit current will affect the DC line protection.
公共交通的安全性是衡量整个系统的首要因素，因此，研究多车直流牵引供电系统继电保护具有重要意义。
The security is the most important thing of the whole public traffic system. Hence, the relay protection study of multi-car's DC traction supply system is significant.
本文简单介绍了电流变化率保护的原理，并通过数学推导导出了一种直流滤波算法。
In this paper, the protection principle based on current rate of change is introduced, and a kind of filtering algorithm is deduced by mathematics.
为了限制逆变器桥臂直通短路时故障电流的上升率，可以在装置的直流侧安装一种称为“环流保护电路”的附加电路。
In order to restrict the rising rate of fault current caused by short circuit on one arm of bridge of inverter, a kind of device named current loop protection circuit can be adopted.
直流断路器是直流供电系统中极其重要的保护设备。
DC circuit breakers are the most important protection equipments for DC power system.
结果表明，实验条件下脉冲电流阴极保护与直流阴极保护相比，二者的保护度相当，而脉冲电流阴极保护有更小的平均电流消耗和更高的保护效率。
The results show that compared with DC, SWPC can achieve the same protective property with less average current consumption, and has much higher protective efficiency.
介绍直流牵引供电系统中直流馈线ddl保护的动作原理，以及保护参数的设定原则，并举例说。
The behavior principle of DDL protection for DC feeder in DC traction current supply system and the setting principle of protection parameters are introduced and illustrative examples are given.
直流锅炉应有中间点温度高警报和断水保护装置。
Monotube boiler should be installed with medium high temperature alarming and water shortage protect device.
直流锅炉应有中间点温度高警报和断水保护装置。
Monotube boiler should be installed with medium high temperature alarming and water shortage protect device.
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