微机综合保护装置是能反应电力系统中各电气设备发生故障或不正常工作状态，并作用于断路器跳闸或发出信号的一种自动装置。微机保护对于电力系统的稳定可靠运行和及时切断故障起着重要的作用，一般符合下列要求的微机综合保护装置比较耐用：
Microcomputer integrated protection device is an automatic device which can reflect the failure or abnormal working state of electrical equipment in power system and can be used for circuit breaker tripping or signal sending. Microcomputer-based protection plays an important role in the safe, stable and reliable operation of power system and the timely cut-off of faults. Generally speaking, microprocessor-based integrated protection devices which meet the following requirements are more durable.
1、可靠性：微机综合保护装置的可靠性很关键，其本身就能成为扩大事故和直接造成事故的主要原因。在其保护的范围内发生故障时，不应因其本身的缺陷而出现失误。
1. Reliability: The reliability of the microcomputer integrated protection device is very important, and it can be the main cause of the accident. When a fault occurs within the scope of its protection, failure should not be made due to its own defects.
2、 灵敏性：微机综合保护装置对在它保护范围内发生的故障和不正常工作状态应能准确地反应，具备灵敏度和可靠的动作。
2. Sensitivity: Microcomputer integrated protection device should be able to accurately respond to faults and abnormal working conditions within the scope of its protection, with sensitivity and reliable action.
3、选择性：系统发生故障时，要求微机综合保护装置只将故障的设备切断，让无故障的设备继续运行，达到有选择地动作的目的。
3. Selection: When the system fails, the microcomputer integrated protection device is required to cut off the fault equipment only, so that the fault-free equipment can continue to operate, so as to achieve the purpose of selective action.
4、 快速性：在系统发生故障后，如不能将故障解决，则可能使故障扩大，短路电流通过的时间越长，设备损坏越严重。所以电力系统发生故障后，微机综合保护装置应尽可能快地解决故障。
4. Rapidity: If the system fails, if the fault can not be solved, the fault may be expanded. The longer the short-circuit current passes, the more serious the equipment damage. Therefore, after the failure of the power system, the microcomputer integrated protection device should solve the problem as quickly as possible.