1．检查设备的清洁程度，使用清洁的干布擦掉任何灰尘和油迹，可能的情况下可使用非腐蚀性洗涤剂。

1. cleanliness inspection equipment, use a clean dry cloth to wipe off any dust and grease, possible use of non corrosive detergent.

2．检查设备铭牌是否完好。使用清洁干布半角这些铭牌清洁干净。

2. check whether the nameplate is intact. Use clean dry cloth to clean the plate width.

3．擦掉灰尘、霉菌和氧化物，同时也要清洁抽出式断路器的固定部分内部。确保断路器室内无异物。

3. wipe off dust, mold and oxide, and also clean the fixed part of the extractable circuit breaker. Make sure that there is no foreign object in the circuit breaker.

4．用清洁干的布清除断路器边线及母线上的灰尘或污垢。

4. dust or dirt on the line and busbar of the circuit breaker with clean and dry cloth.

5．确认用于端子连接的螺栓都正确地紧固，确认端子上没有局部过热的迹象。通过观察接触部分的颜色是否改变可以识别出是否发热，接触部分通常都是银白色。

5. confirm that the bolts used for terminal connection are correctly fastened and confirm that there are no signs of partial overheating on the terminal. By observing the changes in the color of the contact part, it can identify the fever, and the contact parts are usually silver white.

7．检查滑动触点或端子排上的线缆是否牢固。

7. check whether the cable is firm on the sliding contact or terminal.