工程与建筑机械
6ES7901-3DB30-0xA0
发布时间:2015-12-11 10:16:21 产品编号:GY-5-68042043  分享
价格:10.00/件
品牌:6ES7901-3DB30-0xA0
起订:1件
供应:100件
发货:3天内
信息标签:6ES7901-3DB30-0xA0,供应,机械及行业设备,工程与建筑机械

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从DEH打出历史曲线发现#11复合振动连续三次跳动,**高达286um,持续2秒钟,造成汽机跳闸。

2) 排查TSI组态报警发现第7块监视板的两个通道同时激活,但对应的#11相对振动检查历史趋势并不高,导致汽机跳闸的根本原因为TSI监视卡件工作不稳定造成。

3) 由于光字牌报警为综合报警,也不完全排除TSI电源故障跳机的可能性。

暴露的问题:

汽机振动测量元件存在着抗干扰性弱,工作性能不稳定的隐患。

防范措施:

1) 暂时解除#11瓦轴振保护,联系厂家对监视卡做进一步分析。

2) 机控人员对比兄弟厂家振动保护逻辑,讨论、制定我厂的轴振保护逻辑并进行修改。

3) 仪电分场准备探头、前置器、卡件一套,利用机组检修机会对现在安装的探头进行全面检查、校验测试。

4) 在有停机机会时,**检查TSI电源,发现问题及时处理。

5) 维护人员在进行与联锁保护有关的工作时一定严格履行工作票制度和保护解投审批程序,作好安全措施,以防保护误动。

运行人员加强对汽机轴承振动的监视,发现测点跳变等异常时,及时联系仪控人员进行检查处理。工业、商业、医疗领域设备的种类繁多,哪些设备是谐波源负载?哪些设备不是谐波源负载?掌握识别谐波源负载的方法十分重要。当电网上的谐波源负载较多时,就要考虑谐波控制的问题。

从理论上讲,看一个负载是否产生谐波电流,就是看它的电压与电流是否是线性的关系。如果是非线性关系,就是谐波源。按照这个原则就能够区分出所有的谐波源负载。

实际上,经常遇到的谐波源主要有两类,整流电路和相控调功电路。

整流电路广泛应用在变频器、中频炉、直流电机驱动器、UPS电源,以及各类电子设备的场合。相控调功电路电路采用可控硅调整导通角,从而控制灯光的强弱或电炉的温度。

需要注意的一点是,二极管构成的整流电路本身并不会产生严重的谐波,只有当整流电路的后面连接了纹波滤波电容以后,才会产生严重的谐波电流。很多教科书中,在分析整流电路产生的谐波电流时,没有考虑滤波电容的情况,这与实际情况相差很远。

为了简化对问题的分析,我们从单相整流电路的分析开始,三相整流电路产生谐波电流的机理与此相同。

图1所示的是一个带滤波电容的单相整流电路,大部分整流电路中都包含这个电容,否则直流电压的纹波很大。电容上电压保持在接近交流电峰值的电平。当交流电的电压低于电容上的电压时,电网上没有电流流入负载。这时,负载的电流由电容供给,随着输出电流,电容的电压开始降低,在某个时刻,交流电的电压会高于电容上的电压,这时,电网上才会有电流流入电容(给电容充电,使电容上的电压升高)和负载中。因此,电网仅在接近电压峰值的时刻向负载输入电流,电流的形状为脉冲状,如图1所示。根据付立业分析,这种脉冲状电流中包含了丰富的谐波成分。

同样的道理,3相整流器也会产生谐波电流,但是这时对应每个基波的波峰,不是一个脉冲电流,而是两个脉冲电流,如图2所示。

无论单相整流器还是三相整流器,他们的电流波形都发生了畸变,不再是正弦波电流,因此包含了谐波成份。

图2 三相整流器的电路与电压、电流波形

带有滤波电容的整流器从电网吸取脉冲电流。单相整流电路在每个交流电周期内,产生两个脉冲电流,称为2脉整流器;对于3相整流电路,每个周期产生6个脉冲电流,称为6脉整流器。除此以外,还有12脉整流器、18脉整流器等。

整流器所产生的谐波的种类与整流器脉数有关,具体关系如下:

M = PN ± 1

式中:

M = 整流器产生的谐波次数

P = 整流器的脉数

N取自然数。

图3是常见信息设备的电流波形及谐波畸变率

图3 典型信息设备的电流波形

图4是变频器的输入电流波形与电压波形,图中的双峰波形时电流波形,其中包含了丰富的谐波成分,主要是5次和7次谐波。

图4 变频器的谐波电流波形

在分析一台设备是否是谐波源时,只要看他的电源输入电路是否为整流电路,或者晶闸管调功电路。如果是,就要考虑控制谐波电流的问题。

对于三相设备,可以使用HTHF谐波滤波器。但是在订货时,要明确是普通整流电路,还是相控调功电路。如果不能确定时,要向设备的厂商咨询。对于整流电路的设备,使用HTHF滤波器后,可以保证总谐波电流畸变率THID小于8%,对于相控调功电路,使用HTHF滤波器后,可以保证总谐波电流畸变率THID小于15%。

对于单相设备,可以使用SPHF单相谐波滤波器。SPHF单相谐波滤波器是专门为了电脑等信息设备开发的设备,能够有效减小3次以上的各次谐波电流,消除3次谐波电流导致的零线过热引起的火灾隐患。还能保护电脑等设备免受雷电的伤害,是现代化办公环境中理想设备。

Eurotherm Temperature Controller 808/D1/NO/NO/NO AMEX400 Used
BLUE M HonEYWELL CHART RECORDER 7DAY 340C AR15BDN2130
Weschler Instruments Indicator Meter KX-241 0-300 Amps
MICRO MOTION FLOW TRANSMITTER 32-FT-658 1700R11ABAEZZZ 1700-R11ABAEZZZ
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REVERE TRANSDUCERS SSB-D3-1K-15P5 LOAD CELL CLASS 0.03
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BRAY 5-Pin NI/PL "Mini" Connector 09-0002-76144-534 New
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PARKER SSD DRIVES AC890PX CS UNIT 500V LA471171U540 
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Durant 6 Digit Counter 6-Y-31083-413-RMF-PMU 115Vac 7W New
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HOFFMAN ELECTRICAL ENCLOSURE SWING OUT PANEL KIT P-SP78 PSP78 21X28 NIB
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NEW VEEDER ROOT 778514-522 PROXIMITY SWITCH 10-30VDC
ABB BHD15C2P Contactor BHD 15C2P 120V Coil
Newport Voltmeter 2000BS-2 A3,D2 120/240VAC 2000BS2
BOSCH REXROTH 1 824 462 004 ConNECTION PLUG / CABLE NEW
Trutzschler Relay REL 3B 9 490-31.330.000 AA Used
Pepperl+Fuchs Magnetic Sensor 40FR1-33 450022 New 
Cooper Luminaire for Hazard Loc VMVSJ100GP/120 IR 120V
Lot of 4 No Name 20252-1 Carbon Motor Brush 202521 1-5/16"L 31/32"W 5/8"H New
Cutler Hammer Starter Combo ECN1808DAC Fusible SZ 0 
ABB Voltage Relay 1495B30A21 120/140 VAC 240 VDC New
BOSTON GEAR EN63320 AIR LUBRICATOR NPT:1/4" CURRENT MOD. NO.: EN73220-MG NIB
IBM 2210 NWAYS MULTIPROTOCOL ROUTER 2210-14T 221014T 8MB DRAM 100-240V
Ronan Explosion Proof Annunciator X15-1001P 115 VAC 3 A Amp 125 VDC New
NEW SALZER S606-US1A-2280-02 ROTARY SWITCH S606US1A228002 S606 US1A 2280 02
PARVUS PC104 PCB-0398D-03 LCD DISPLAY / KEYPAD BOARD / CARD 
CUTLER-HAMMER ECN1638AAA SIZE SZ 3 115-120V COIL FUSIBLE MOTOR STARTER COMBO
FOXBORO Lan dro Cable Assy. 100 Ft Rev. D P0900JH New
AERZENER 26.4 KW VACUUM PUMP GMB 16.13HV 43.1/24.9 A
NEW SIEMENS DAMPER ACTUATOR MOTOR 331-4812 3314812 3" 8-13 PSI
GE 463L60AJA10A0 CR460E1 CR460B CRCR460P32 ENCLOSED LIGHTING ConTACTOR KIT NIB
United Electrical Pressure Switch J402-610 J402610 1000 PSI 68.9 Bar 26A 480VAC
Dynisco UPR 800 Input Indicator UPR800-0-0-3 UPR800003 240 VAC 27VA 27 VA New
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JOSLYN CLARK SIZE 0/1 230/240 VOLT COIL CY 31-5 CY315
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SQUARE D ALTIVAR ATV66D12N4U 8839 480V 15 HP MOTOR ConTROLLER POWER CONVERTER
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HEATRON LJ38AX2A 38 7/8" X 1/2" 1000W 240V 9529 HEATER CARTRIDGE ELEMENT NEW
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PROCESS JJ28U-346-00-15-F3A018-6 29' THERMOCOUPLE PROBE
PROCESS JJ28U-271-00-15-F3A018-6 23' THERMOCOUPLE PROBE
FCI FR72-4/1"/4"U/S/G/VU/5181-Y/T 115VAC 7VA FLOW SWITCH 1" NPT
Square D Manual Switch 2510 KS-2C 2510KS2C Series A 250-600VAC 20-30 A Amp 1-3PH
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LXE 4400L20 TRANSCEIVER RFU base STATION 6281 SERIES 6200 100-240V 2A 6281SSAM
ROSEMOUNT 1151DP4S2251B1 SMART PRESSURE TRANSMITTER W/ REMOTE DIAPHRAGM 0-150H20
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Foxboro Consotrol Folding Charts 55126 6TX 2 Charts per Box New!
NEW LOT OF 6 PHOENIX ConTACT MSTB 2.5 TERMINAL BLOCK 8-ST STATION 250V 2.5mm 10A
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GE LIGHTING FG6G01M1AN11A 1000W 120V LUMINAIRE FITTING BALLAST NIB
CAPP Burner Control 31079 120 V Volt Repaired
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NATIonAL ELECTRonICS RESISTANT WELDER HEAT EXCHANGER SCR RECTIFIER NL-1928TNC
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Micropulse AT Linear Transducer BTL6-P111-M0400-A1-S115
BANNER USE2824YI MICRO-SCREEN LIGHT CURTAIN NIB
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Moore Industries Indicator Alarm ECA/1-5V/SH2/24DC 250 VAC 5 AMP New
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BURNS 148 240 148240 36" X 1/4" 1/2" NPT THERMOCOUPLE TEMPERATURE  PROBE NEW
BURNS 143 709 143709 36" X 1/4" 1/2" NPT THERMOCOUPLE TEMPERATURE PROBE NEW
NEW DAYCO 2830-V-366 VARIABLE SPEED COG-BELT 2830V366 TIMING BELT 1-3/4"WIDE
Nitto Female Quick Connect Coupler Barb Barbed hose stainless 2" s/s 16TSH New
E Dold & Sohne Timer Relay ZR 710 ZR710 1.25-50 sec 110 V Volt Used
Square D Open Type Motor Starting Switch 2510 KO-2C 2510KO2C Series A 600VAC New
Clarostat Potentiometer 58C110K 58C1 10K Ohms Ω 1 Turn 1-3/4" Stem 1/4" Dia New
NORDSON GLUE 3000 MULTISCAN OMNISCAN PLUG 2300 FM 170
ZM TECH ZA1750-010000-25V 1-3/4  SEAL ZA1750-00-2500V
SSD link Analog I/O Module L5201-1-00-012 L5201100012 Used
HELIOS 1099 230V 1500W 31 7/8" OVERALL LENGTH HEATING ELEMENT NEW
New Mannesmann Demag Air Motor Rebuild Kit URB-75200161
MCG 709-122 709122 w. Reliance Electric Enclosure 2RA609 0.6kW 1PH USED
BEI Industrial Encoder XH25D-SS-1200-ABZC-28V/V-EM18 3/8" Shaft Dia New
Dynapar Frequency-to-Voltage Converter w/o Option BD FV20S FV2-0-S Used
Consense Sensor Assembly w. Enclosure SE602-121-10-09-50G 115 VAC 5 Amp New
Encoder 755A Series Accu-Coder 755A-03-S-1000-A-OC-1-S-J00-N 28 VDC New
Abbott Transistor W5D20 105-125 Vac 5Vdc @ 20A 14371 Westinghouse 8812
RIS T/C Transmitter SC-1306W SC1306W 800-1200ºF 115 VAC 4W 4-20mA New
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Miki Pulley MikiPulley Electro Magnetic Brake Assembly BB8-0000-008 BB80000008 
REPAIRED HEIDENHAIN LS176 LS 176 295 710 2W 740 MM LINEAR ENCODER GLASS SCALE
U-R-B-A-N URBAN ConTROLLER DISPLAY UTR-320A UTR320A NEW
GE SG400S MOD. 2 SURFACE MOUNTED TYPE 1 400A 400 A CIRCUIT BREAKER ENCLOSURE NIB
PARKER SSD DRIVES AC890PX CD UNIT 690V LA471160U713
STI VALUSCAN VS6554-1 VS6500-1 54" LENGTH LIGHT CURTAIN TRANSMITTER 16 FT RANGE
PARKER SSD DRIVES AC890PX CD UNIT 500V LA471743U540
GENERAL ELECTRIC GE ALF475-01 660WATT 600VOLT  LAMPHOLDER PRESSURE LOCK TERMINAL
GE GENERAL ELECTRIC STEP VOLTAGE REGULATOR ConTROL SM-3 SM3 F200G05 F200-G05
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Moore Industries ECA Alarm ECA/1-5V/DH1H1/117AC 250 VAC New
NEW LOT OF 14 NO NAME POGO PIN PROBE SPA-4H SPA4H
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MERCOID ConTROL PRESSURE SWITCH DAH-31-153-9 9-64 NEW
Gefran Transducer M33-6-M-B02C-1-0-L-000 200 Bar 3.33mV
ARCOLECTRIC / NEMA C1750O C17500 250V 2 POSITION ON/OFF TOGGLE SWITCH NEW 
NEW SIEMENS 3SE3 120-8GW POSITION SWITCH 3SE31208GW
Trutzschler Counter EWG 3A EWG3A 9 490-32.333.000 24 Volt New
LITHonIA S50 LIGHTING FIXTURE 250W 120V 2.80A BALLAST
ALLEN BRADLEY POWER SUPPLY CHASSIS 1771-PSC 16 AMP MAX @5.25 VDC 1771PSC 
PROCESS JJ28U-221-00-15-F3A018-6 19' THERMOCOUPLE PROBE
INTEL NETSTRUCTURE 1300 STOREFRONT APPLIANCE INS1301PP A35185-001
Phoenix Interbus-S  Digital Input IBS RT 24 DI 32-T IBSRT24DI32T w/ 6 Termials
IXYS THYRISTOR MODULE MCC200-16I01  MCC20016I01 
OMRON CORP. DIGITAL TEMPERATURE PROCESS ConTROLLER E5AX E5AX-LAF E5AXLAF
Eaton/Cutler-Hammer Pneumatic Timer D80JD12A D80J 110/120 Volt New
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LEESON G150167.60 215TC C215T17FK43C 10HP 10 HP 208-230/460 3PH 1760 RPM MOTOR
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Partlow MRC 7700 Circular Chart Recorder 776602130221 115 VAC 1/8 HP 250VA Used
Synchron Automatic Timing & Controls 324C12B3ER2A01X 120/240VAC 120VDC New
GE Yokogawa Panel Meter YCA 2504 400-0-400 DC Amperes 4-7/8" W X 4-3/8" L New
GE General Electric CCMM-RS232 Adaptor Unit IC630CCM390A 115/230 VAC New
SQUARE D SY/MAX PROCESSOR MODULE CARD 300 8020 SCP-312 X SCP-312X SERIES G1
Fairchild Industrial Transducer T5200-10 T520010 1-5 mA 20 PSIG 3-15 PSIG New
LUMAPRO HIGH PRESSURE SODIUM LAMP LIGHT BULB 2YGF2 LU400/S51 ET18 400W 400 WATT
ZF HYSTERESIS EBU 10L 24V/43W CLUTCH 6627 105 014 NEW
ELECTRIC HEATING EQUIPMENT LPB-58459-F 6" BAND HEATER 1000W COILS 104V VOLT 1PH
MULLER MARTINI 4401.0013 Key Pad W/ LED 44010013 24Vdc 0.1A New
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商铺:http://m.ceoie.com/lujun/
去 厦门阿米控技术有限公司怎么走?上图中的红点是 厦门阿米控技术有限公司在厦门市的具体位置标注,操作左上角地图工具可以放大缩小哦。
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