nader NDM3EU-225 Operating Instructions Manual page 11

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authorized modifications.
在执行维护操作前，必须先完成下列操作：
Follow following steps before conducting maintenance:
（1）使断路器分闸；
Open the breaker;
（2）断开电源与断路器的连接（包括主电路、辅助电路） ；
Disconnect power supply and breaker (including main circuit and auxiliary circuits)
（3）将断路器从安装位置上卸下（一般用于插入式，固定式最好也如此）
Remove the breaker from its installation position (normally for plug-in installation; it is
recommended to
do so for a fixing one).
断路器维护在正常操作条件下每年一次，在非正常条件下每半年一次，以下为维护内容：
Maintenance of breaker is carried out yearly under normal use and every six months under
abnormal use. The maintenance includes following procedures:
（1）再扣断路器，合、分断路器，在断路器合闸时用脱扣按钮使断路器脱扣，往复操作 5 次，断路器
应能可靠进行再扣、合、分、脱扣动作；
（2）清除断路器表面及连接处的灰尘（用清洁、干燥的抹布擦拭） ；
（3）清洁隔弧板，如必要则需要更换隔弧板；
（4）绝缘测试（见 7.1）
（5）检查所有连接情况，用砂布擦除氧化物，用可溶解剂清洁，拧紧螺栓和螺母；
（6）如果断路器还装有其它内、外部附件，应逐一检查各个附件，以确保其处于正常工作状态。
（按照 8 附件说明 详细内容进行测试）
(1) Re-trip the breaker, close and open the breaker, use tripping button to trip the breaker when it is
closed; repeat for 5 times to check that the breaker can reliably re-trip, open, close and trip.
(2)Clean dust on breaker surface and connections (wipe with clean and dry cloth).
(3)Clean the flash barrier; replace it if necessary.
(4)Carry out insulation test (see Section 7.1).
(5)Check condition of all connections. Wipe away oxidations with abrasive cloth and clean with
soluble agent Screw bolts and nuts tight.
(6)If other internal or external accessories are installed in the breaker, check them one by one to
ensure they are in normal working condition (carry out test according to Section 8: Detailed
accessory descriptions).
9 注意事项 Notes
9.1 安装注意事项 Precautions in installation
（1）断路器本体、底板（板后接线用） 、底座（插入式接线用）固定在安装板上。
（2）与主电路连接必须由具有专业资格的人员进行配线作业。
NDT2920214
Edition
第 2 版
版次
Version2
11
实施日期
Implementation date
2019.12.26
文件控制
20190417