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微機(jī)綜合保護(hù)裝置是能反應(yīng)電力系統(tǒng)中各電氣設(shè)備發(fā)生故障或不正常工作狀態(tài)，并作用于斷路器跳閘或發(fā)出信號的一種自動裝置。微機(jī)保護(hù)對于電力系統(tǒng)的安全穩(wěn)定可靠運(yùn)行和及時切斷故障起著重要的作用，一般符合下列要求的微機(jī)綜合保護(hù)裝置比較耐用：

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：微機(jī)綜合保護(hù)裝置的可靠性很關(guān)鍵，其本身就能成為擴(kuò)大事故和直接造成事故的主要原因。在其保護(hù)的范圍內(nèi)發(fā)生故障時，不應(yīng)因其本身的缺陷而出現(xiàn)失誤。

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、 靈敏性：微機(jī)綜合保護(hù)裝置對在它保護(hù)范圍內(nèi)發(fā)生的故障和不正常工作狀態(tài)應(yīng)能準(zhǔn)確地反應(yīng)，具備靈敏度和可靠的動作。

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、選擇性：系統(tǒng)發(fā)生故障時，要求微機(jī)綜合保護(hù)裝置只將故障的設(shè)備切斷，讓無故障的設(shè)備繼續(xù)運(yùn)行，達(dá)到有選擇地動作的目的。

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：在系統(tǒng)發(fā)生故障后，如不能將故障解決，則可能使故障擴(kuò)大，短路電流通過的時間越長，設(shè)備損壞越嚴(yán)重。所以電力系統(tǒng)發(fā)生故障后，微機(jī)綜合保護(hù)裝置應(yīng)盡可能快地解決故障。

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.