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3、故障分析及處理
3.1 雷電事故引起係統卡件大面積燒壞
某夏天的一天,操作站突然顯示機組部分振動值、位移值為0。經檢查,共有4塊振動位移卡(3500/40M)和1塊鍵相卡(3500/25),有的狀態指示燈全熄滅,或閃爍或變紅報警,證實卡件壞。共計8個振動回路,5個位移回路,2個鍵相回路失靈。其中全部振動回路和位移回路參與機組緊急停車聯鎖。
故障發生後,有8個振動回路和1個轉速回路仍然正常工作,可以判斷電源卡、通訊卡沒有損壞。機組並未停車,說明繼電器卡仍正常工作。(該係統通過繼電器卡,送幹接點信號給機組停車係統)當天為強雷雨天氣,裝置區多次發生多次雷電,卡件大面積失靈與雷擊時間點吻合,因此雷擊應為上述卡件損壞原因。
本係統使用UPS供電,UPS本身已具有隔離功能。相對其它卡件,損壞卡件有兩個共同途徑與係統外設備相連,可能由此引入強電,燒壞卡件。
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EATON 3750X4 WEATHERHEAD MALE RUN TEE FITTING 1/4IN NPT D590219
EATON 48X8X8 BRASS MALE CONNECTOR 1/2IN NPT X 1/2IN TUBE OD D590151
LINCOLN 62278 NYLON TUBING 1/8IN X 100FT D590830
PARKER 8Z-Q8VY-SS STAINLESS TUBE END QUICK COUPLING 1/2IN D590978
EATON 48X12 3/4IN SAE X 1/2IN NPT BRASS FITTING CONNECTOR D590324
7 3/4IN X 7/8IN ID BRASS FERRULE D590400
EATON 69X6 3/8IN TUBE X 1/4IN NPT 90 BRASS ELBOW FITTING D590457
EATON C5515X10 5/8IN JIC X 5/8IN SAE O-RING 90 ELBOW D590450
IGUS 17.5.063 CABLE CARRIER 70CM D590791
EATON 3328X6 3/8IN MNPT BRASS PIPE NIPPLE D590073
VIEGA 80495 PROPRESS STAINLESS 90DEG ELBOW 3/4 X 3/4IN D590992
VIEGA 80410 PROPRESS STAINLESS 1IN 90DEG ELBOW D590995
EATON 04Z-664 WEATHERHEAD SWIVEL 90 1/4IN JIC X 1/4IN HOSE D590862
BRASS 90 DEG HYDRAULIC FITTING 5/8IN JIC X 1/2IN NPT D590192
EATON 08E-608 1/2 HOSE X 1/2IN JIC 37 HYDRAULIC FITTING D590854
EATON 5/8IN JIC X 7/16IN TUBE ID CRIMP HOSE FITTING D590242
EATON 04U-J04 1/4IN HOSE X 1/4IN JIC MALE PIPE SWIVEL FITTING D590201
EATON 08E-108 1/2IN HOSE ID X 1/2IN MALE PIPE FITTING D590159
EATON 04U-604 1/4IN HOSE X 1/4IN SAE FEMALE PIPE SWIVEL D590145
CATHAY SEAL CARGO CONTAINER SECURITY BOLTS 7.9MM D591170
LASCO 448-040 SCH40 PVC CAP 4IN FIPT D587718
DIXON B-400 ALUMINUM 4IN CAM & GROOVE COUPLER D591641
NIBCO PC607 PRESSYSTEM 2IN 90DEG COPPER ELBOW MISCELLANEOUS D587708
NIBCO 9009150PC PC600-2 PRESSYSTEM FITTING REDUCER 2 X 1IN D588208
NIBCO 9098550PC PC611 PRESSYSTEM TEE 3/4 X 3/4 X 1/2IN D588114
NIBCO 9009050PC PC600-2 PRESSYSTEM REDUCING COUPLING 2 X 1-1/2IN D588094
NIBCO PC611 PRESSYSTEM TEE 1-1/4 X 1-1/4 X 1-1/4IN D587944
NIBCO PC611 PRESSYSTEM TEE 1-1/2 X 1-1/2 X 1-1/2IN D588255
RAYCHEM MCK-3V 1000V MOTOR CONNECTION KIT 3/C AWG #2-#4/0 FEEDER D592579
REPUBLIC 230-4700K CENTRIFUGAL BLOWER MAINTENANCE BELT D565239
HYDROLAB HL2052 STIRRER D525337