介绍测量对地导纳原理的LD 3型发电机转子一点接地继电器的保护原理。
The paper introduces the principle of LD-3 rotor one-point grounding relay that measures the admittance against the ground.
第一个功能是提供一个接地路线给加热器继电器。
Its first function is to provide a route to earth for the heater relay.
与继电器配合，可对系统和设备进行过电流、过负荷和接地等保护。
Cooperating with relay, it can protect system and equipment from excess current, overload, and earthing etc.
后备继电系统将设置第一、第二与第三区方向距离继电器，以防相位故障与接地故障。
The backup relaying system will have first, second, and third zone directional distance relays for protection against phase and ground faults.
配合SD - LJD (LXK)系类零序电流互感器和动作继电器即组成完整的零序(接地)保护系统。
Used together with SD-LJD (LXK) series ZCT and executing relay to form a complete zero sequence (ground) protection system.
对于后备保护装置防止高阻抗接地故障，将配置一只双极方向过电流继电器，同瞬时跳闸附件的时间成反比。
For backup protection against high resistive ground faults, there will be a dual polarized directional overcurrent relay, inverse time with instantaneous trip attachment.
提出一种用零序分量做动作量，负序分量做制动量的综合序分量接地距离继电器。
An earth fault distance relay based on the combined sequence components is presented.
使用者可将继电器接地故障跳闸电流设置为高于最高值几毫安，以准确测量系统充电。
User is able to set the ground fault trip current of the relay just milliamps above the highest level, to accurately measure the system charging.
从理论上分析了同杆并架双回线跨线不接地故障时距离继电器测量阻抗的变化规律。
This paper analyses the rule of variations measuring impedance of distance relay when phase to phase fault occurs between two lines on double circuit line on the same pole (DLSP).
该保护继电器实时监控电流信号，具有3段电流保护和接地漏电保护等动作特性。
The protection relay monitors the signals of currents real time and has performance characteristics of three-sect current protection, grounding leakage protection and other protections.
偏移特性阻抗继电器常用于小电流或大电流接地系统中作为输电线路距离保护的测量元件。
LZ-22 partial impedance relay usually used as measuring element on distance protection of the line at small or big current power system.
提出了采用测量线路零序导纳进行接地保护的新原理，讨论了直线式导纳继电器的接地保护判据。
New principle for feeder grounding fault protection based on zero sequence admittance is presented in this paper. Criterions for the line ground relay with zero sequence admittance are also discussed.
提出了一种基于负序电压极化的自适应接地阻抗继电器方案，并对其动作特性进行了分析。
An adaptive impedance relay based on negative sequence voltage polarization is proposed, and its operating characteristic is analyzed.
加热器电路接地线直接连接到地面，加热器电路电源线也直接从点火电路或继电器盒处提供。
The heater circuit power wire is supplied directly from the ignition circuit or a relay and the heater circuit ground is connected directly to the ground plane.
此类继电器能够增加系统安全性，并对三相交流接地电阻或接地配电系统进行可靠的低级接地故障检测。
They provide system security and immediate reliable low level ground fault detection on three-phase AC resistance grounded or grounded electrical distribution systems.
本文提出了一种分相式接地距离继电器新判据，并进行了理论分析。
This paper presents a new criterion to ground distance relay. The ground distance relay takes three-input comparators.
接地距离继电器要解决的关键问题之一是提高其耐受过渡电阻的能力。
One of the critical problems that need to be solved by a ground distance relay is to improve the capacity of the earth-fault resistance endurance of the relay.
接地距离继电器要解决的关键问题之一是提高其耐受过渡电阻的能力。
One of the critical problems that need to be solved by a ground distance relay is to improve the capacity of the earth-fault resistance endurance of the relay.
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