确保正确的经济和功能运行的重要性
将安装作为一个整体，并将引起的任何问题降至低
异常操作条件和/或故障。
本分析讨论了不同设备之间的协调
致力于保护区域和特定组件，以期：
•始终保证人员和安装的安全；
•识别并快速排除受问题影响的区域
不分青红皂白地采取行动，从而减少可用于
网络的其余部分；
•包含故障对网络其他完整部分的影响
（电压骤降，旋转机器失去稳定性）；
•减少受影响区域内组件的应力和损坏；
•确保具有馈电电压的服务的连续性；
•确保在发生任何故障时提供足够的备份
负责打开电路的保护装置；
•为员工和管理系统提供他们需要的信息
尽快恢复服务，并尽量减少对
网络的其余部分；
•实现可靠性、简单性和成本之间的有效折衷
有效性
更准确地说，有效的保护系统必须能够：
•了解发生了什么以及发生在哪里，并加以区别
在异常但可容忍的情况和给定范围内的故障之间
影响区，避免不必要的跳闸和
不合理地断开系统的健全部分；
•尽快采取行动控制损坏（破坏、加速
老化，…），保护电源的连续性和稳定性。
合适的解决方案来自这两者之间的折衷
对立需要准确识别故障并迅速采取行动，这是明确的
在功能上，这两个要求中的哪一个优先。

importance both to ensure the correct economic and functional operation of the installation as a whole and to reduce to a minimum any problem caused by anomalous operating conditions and/or malfunctions. The present analysis discusses the coordination between the different devices dedicated to the protection of zones and specific components with a view to: • guaranteeing safety for people and installation at all times; • identifying and rapidly excluding only the zone affected by a problem, instead of taking indiscriminate actions and thus reducing the energy available to the rest of the network; • containing the effects of a malfunction on other intact parts of the network (voltage dips, loss of stability in the rotating machines); • reducing the stress on components and damage in the affected zone; • ensuring the continuity of the service with a good quality feeding voltage; • guaranteeing an adequate back-up in the event of any malfunction of the protective device responsible for opening the circuit; • providing staff and management systems with the information they need to restore the service as rapidly as possible and with a minimal disturbance to the rest of the network; • achieving a valid compromise between reliability, simplicity and cost effectiveness. To be more precise, a valid protection system must be able to: • understand what has happened and where it has happened, discriminating between situations that are anomalous but tolerable and faults within a given zone of influence, avoiding unnecessary tripping and the consequent unjustified disconnection of a sound part of the system; • take action as rapidly as possible to contain damage (destruction, accelerated ageing, ...), safeguarding the continuity and stability of the power supply. The most suitable solution derives from a compromise between these two opposing needs-to identify precisely the fault and to act rapidly - and is defined in function of which of these two requirements takes priority.