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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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FREELIN-WADE 1J-266-10 SUPER SOFT NYLON TUBING 3/8 X 0.275 X 100FT D572720
EVER-TITE 5C 356-T6 5IN CAM AND GROOVE HOSE SHANK FITTING D568393
DEKORON 1548-4000C POWER CONNECTION KIT D568167
ALLEN BRADLEY 100-FSV136 SER A SURGE SUPRESSOR VERISTOR 56-136V-AC D577349
SOLUS VG-213-12-01 CONVEYOR GUIDE RAIL BRACKET WITH KNOB D577252
NIBCO PC601 PRESSYSTEM COUPLING W/O STOP P X P 1-1/2IN D589187
EATON 6825 1/4IN NPT BRASS NEEDLE VALVE D589829
EATON 1110X5 WEATHERHEAD 5/16IN SAE 45 FLARE NUT D590225
BALDWIN BT230 SPIN-ON FULL-FLOW OIL FILTERS MISCELLANEOUS D593809
SUPCO SHL120 60T11 FAN THERMOSTAT LIMIT CONTROL D592856
SQUARE D AR11.2 OVERLOAD RELAY THERMAL HEATER UNIT D594849
CATERPILLAR CAT 967692C1 3/8IN SAE O-RING METALLIC SEAL D595492
DAYTON 2X900 PILLOW BLOCK BALL BEARING UNIT 1IN D596023
ALLEN BRADLEY 802T-W1A ROLLER LEVER 1.5IN RADIUS SER B D596511
UNISTRUT J1225N EG 2-1/2 IN CONDUIT AND PIPE HANGER D550240
ULTRATECH 2115 ULTRA-DRAIN PLUG 4IN D554814
VI-CAS VC204B BLUE VACUUM SUCTION CUP 2.03IN LIP DIA D577601
RAYCHEM PMKG-LT LOW PROFILE TEE KIT D574252
SWAGELOK 18IN STEEL BRAIDED HOSE D575167
BIHL-WIEDEMANN BW1239 AS-I PASSIVE DISTRIBUTOR D575646
NIBCO PC600-2 PRESSYSTEM REDUCER COUPLING 3/4 X 1/2IN D587974
NIBCO PC600-DS PRESSYSTEM COUPLING 3/4IN D589115
NIBCO PC600-2 PRESSYSTEM REDUCING COUPLING 2 X 1/2IN D589124
NIBCO PC603 PRESSSYSTEM ADAPTER 1/2IN PRESS X 1/2IN NPT D589100
NIBCO PC611 PRESSYSTEM TEE 1-1/4 IN PRESS X PRESS X PRESS D589170
NIBCO PC606-2 PRESSYSTEM 45 FTG ELBOW 1-1/2IN FTG X PRESS D589178
EATON C3069X6X4 3/8 X 1/4 IN NPT CONNECTOR FITTING D589709
EATON 04U-684 1/4 JIC X 1/4IN HOSE CRIMP 45 DEG FITTING D589674
WEATHERHEAD 06U-610 SWIVEL FITTING 3/8IN HOSE X 1/2IN TUBE D589728
EATON 49X4 SAE FLARE BRASS 90 ELBOW 1/8IN X 1/4IN D589735
FOSTER PM13S BRASS PUSH-ON SWIVEL 3/8IN NPT X 3/8IN ID FITTING D590014
EATON 3329X4 LONG BRASS PIPE NIPPLE 1/4IN NPT X 3/8IN HOSE ID D590009
EATON 3330X6 LONG BRASS PIPE NIPPLE 3/8IN NPT X 3IN LENGTH D590008
EATON 100X6 BRASS TUBE NUT 3/8IN D589658
EATON 3/8IN NPT X 3/8IN CRIMP STRAIGHT HOSE FITTING D590647