这种协调是通过双方之间的对话来实现的
电流测量装置，当其确定设置阈值时
已超过，请正确识别并仅断开
受断层影响的区域。
实际上，它可以通过两种方式实现：
•脱扣器发送已设定的预设电流阈值信息
超过监管系统，由监管系统决定采取何种保护措施
装置必须跳闸；
•如果电流值超过其设定阈值，每个保护
装置通过直接连接或总线向保护装置发送闭锁信号
层次结构中较高的设备（即相对于
功率流），并在跳闸之前，确保类似的闭锁信号
未从保护装置下游到达；这样，只有
紧接故障上游的保护装置跳闸。
一种模式预计跳闸时间约为1秒，主要用于
在短路电流不特别高的情况下，功率流
未定义。
二种模式使跳闸时间明显缩短：相对于
时间歧视协调，不再需要增加
当我们靠近电源时，故意延时会逐渐增加
供给大延迟与检测任何
存在从保护装置下游发送的阻塞信号。
优势：
•减少跳闸次数，提高安全水平；
•减少故障和干扰造成的损害
在供电网络中；
•减少断路器和断路器上的热应力和动态应力
系统的组件；
•大量歧视级别；
•保护冗余：在区域识别故障的情况下
跳闸由其他保护功能的设置确保
断路器。特别是，可以调整延时保护
随着时间值的增加，抗短路功能越接近
网络馈线。

type of coordination is implemented by means of a dialogue between current measuring devices that, when they ascertain that a setting threshold has been exceeded, give the correct identification and disconnection only of the zone affected by the fault. In practice, it can be implemented in two ways: • the releases send information on the preset current threshold that has been exceeded to the supervisor system and the latter decides which protective device has to trip; • in the event of current values exceeding its setting threshold, each protective device sends a blocking signal via a direct connection or bus to the protective device higher in the hierarchy (i.e. upstream with respect to the direction of the power flow) and, before it trips, it makes sure that a similar blocking signal has not arrived from the protective device downstream; in this way, only the protective device immediately upstream of the fault trips. The first mode foresees tripping times of about one second and is used mainly in the case of not particularly high short-circuit currents where a power flow is not uniquely defined. The second mode enables distinctly shorter tripping times: with respect to a time discrimination coordination, there is no longer any need to increase the intentional time delay progressively as we move closer to the source of the power supply. The maximum delay is in relation to the time necessary to detect any presence of a blocking signal sent from the protective device downstream. Advantages: • reduction of the tripping times and increase of the safety level; • reduction of both the damages caused by the fault as well of the disturbances in the power supply network; • reduction of the thermal and dynamic stresses on the circuit-breakers and on the components of the system; • large number of discrimination levels; • redundancy of protections: in case of malfunction of zone discrimination, the tripping is ensured by the settings of the other protection functions of the circuit-breakers. In particular, it is possible to adjust the time-delay protection functions against short-circuit at increasing time values, the closer they are to the network’s feeder.