为避免该类事故的发生，采用新型的具有保护零线断线保护功能的断路器是非常有益的。
In order to avoid this kind of accident, the using of new circuit breaker with protection function of zero curve broken is extremely beneficial.
介绍了在三相四线制供电系统中，中线的作用，断线的危害，以及一种简单可靠的断线保护电路。
The paper introduced the effect of neutral wire the harm of open circuit and a kind of simple credible open circuit protection method.
PT断线作为电力系统中一种常见的故障，能否及时有效地进行判别，是继电保护装置正确动作的前提条件。
It is the precondition for protection's correct operation to verify PT breaking in time, which is a common fault in power system.
本文提出了一种利用微机软件实现的变压器差动保护电流回路断线闭锁方案。
A blocking scheme for current circuit break in differential protection system of transformers performed by software of micro-computer is proposed in this paper.
此外，还包括了霍尔传感器断线检测、电池欠压保护、过流保护等保护功能。
Also protect circuits against loss of hall signal, low battery voltage, over current are included.
本文提出了一种有效的单片机发电机内部短路保护中电流互感器CT和电压互感器PT的断线判别方法。
This article presents a new method to detect CT and PT wire break. This method can be used on generator micrcomputer based relay protection device against internal short circuit fault.
智能型电动机综合保护器能够根据负载电流判断线路中的各种故障并及时进行保护，最大限度的减少经济损失。
The intelligent motor protectors can be used, which will protect the abnormally running motors from damage, to minimize the malfunction time and reduce the economic losses.
智能型电动机综合保护器能够根据负载电流判断线路中的各种故障并及时进行保护，最大限度的减少经济损失。
The intelligent motor protectors can be used, which will protect the abnormally running motors from damage, to minimize the malfunction time and reduce the economic losses.
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