描述
多点接地方式是在GIS的某个分段内，用导体连接外壳和大地，并且采用两点以上的多点接地。一般在结构上，串联的法兰盘之间不设绝缘，设备的支座不绝缘，并用固定螺栓导通，接地线也装于壳体。多点接地的优点很多：外部磁漏少，感应过电压低；由于GIS外壳有两点以上的接地点，因而可大大提高其可靠性及安全性；不需要使用绝缘法兰等绝缘层，施工方便；外壳和导体电流几乎抵消，因此外部磁场较小，使钢构发热和流过控制电缆外皮的感应电流都很小。由于外壳中有感应电流流过，因此外壳中的温升和损耗比一点接地方式大。但电站GIS工程中外壳损耗本身不大，因此在工程中可以忽略补给。例如：广州抽水蓄能电站GIS外壳的功率损耗为2.43～3.79W/(m·ph)，可以略去不计。
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主营：世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse（美国西屋）系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse（西屋）：OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro（福克斯波罗）：I/A Series系统，FBM（现场输入/输出模块）
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余（TMR）
结构的zui现代化的容错控制器。
⑨Siemens(西门子)：Siemens MOORE，Siemens Simatic C1，Siemens数控系统等。
⑩Bosch Rexroth（博世力士乐）：Indramat，I/O模块,PLC控制器,驱动模块等。
◆Motorola（摩托罗拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。
MODICON AS-BDAP-218 TSX COMPACT
SANDVIK 431-350172-R22-?1 BTS TURNING INSERT HOLDER
2 SANDVIK 435-100151L47 LATHE TOOL HOLDERS,NEW
MODICON AS-B807-132 INPUT MODULE
SQUARE-D KAP362001212 3-POLE 200 AMP CIRCUIT BREAKER
100 SANDVIK 009242N49 SOLID CARBIDE INSERTS,TiN,NEW
4 SETS STRIPPIT OBROUND PUNCHES&DIES
WILSON 1.3125″THICK TURRET SQUARE PUNCH
DAYTON 2Z844 SINGLE PHASE AC GEARMOTOR,1/3HP
STRIPPIT 3.250 ROUND PUNCH&DIE SET,3-1/2″STYLE
STRIPPIT 3.0625″ROUND PUNCH&DIE SET,3-1/2″STYLE
STRIPPIT 3.500″ROUND PUNCH&DIE SET,3-1/2″STYLE
3 BANNER 26913 PHOTOELECTRIC SENSORS,NEW
29 WILSON THICK TURRET ROUND PUNCHES.203 THRU.500
9 SNR 6205.ZZ.J30 BALL BEARINGS,NEW
2 ALLEN-BRADLEY 509-COD SIZE-2 STARTERS,3-POLE
DAYTON 6K408D SINGLE PHASE AC MOTOR,1/2HP
STRIPPIT 2.1875 ROUND PUNCH&DIE SET,3-1/2″STYLE
STRIPPIT 1.505 X 1.448 SINGLE-D PUNCH&DIE SET
STRIPPIT CENTERING SET-UP PLUG,PUNCH&DIE
7 SETS STRIPPIT SINGLE-D PUNCHES AND DIES,MIXED
GAST 6AM-NRV-22A PNEUMATIC/AIR MOTOR
STRIPPIT 2.875″ROUND PUNCH&DIE SET,3-1/2″STYLE
28 SNR 6003EEC3A BALL BEARINGS,NEW
OMRON E5CK-AA1-302 MULTI-RANGE TEMPERATURE CONTROLLER
17 LEGACY 3/8″NPT AIR QUICK COUPLERS,A78620?-BG-GRA
20 SNR/SKF/NSK 6205 BALL BEARINGS,NEW
STRIPPIT 2.3750″ROUND PUNCH&DIE SET,3-1/2″STYLE
STRIPPIT 1.630 X 1.573 SINGLE-D PUNCH&DIE SET
STRIPPIT 2.9375″ROUND PUNCH&DIE SET,3-1/2″STYLE
4 FESTO MFH-5-1/4 PNEUMATIC SOLENOID VALVES,NEW
7 BUSSMANN LPS-RK-300SP LOW-PEAK FUSES,300AMP,NE?W
17 SNR 6013.ZZC3(J30)BALL BEARINGS,NEW
2 WILSON.191″&.238″THICK TURRET HEXAGON PUNCHES
STRIPPIT 1.9375″ROUND PUNCH&DIE SET,3-1/2″STYLE
2 STRIPPIT INDEXING TOOLS,1-1/4″STYLE,PUNCH&DIE
2 SETS STRIPPIT OBROUND PUNCHES&DIES,WILSON,1-1/4″
21 WILSON THICK TURRET RECTANGLE PUNCHES LOT
DAYTON 6K408BA AC MOTOR SINGLE PHASE,1/2HP,NEW
3 BUSSMANN LPS-RK-400SP 400AMP FUSES,600 VAC
STRIPPIT 3.375 ROUND PUNCH&DIE SET,3-1/2″STYLE
WILSON THICK TURRET OHM/OMEGA STAMP/EMBOSSING PUNCH
7 WILSON THICK TURRET SINGLE D/D PUNCHES&DIES.378+
STRIPPIT 2.182″ROUND PUNCH&DIE SET,3-1/2″STYLE
23 WILSON THICK TURRET SQUARE PUNCHES.125 THRU.344
4 SETS DOUBLE-D/DD PUNCHES&DIES,1-1/4″STYLE
3 SETS STRIPPIT OBROUND PUNCHES&DIES
STRIPPIT 2.000″ROUND PUNCH&DIE SET,3-1/2″STYLE
4 SETS DOUBLE-D/DD PUNCHES&DIES,5/8″STYLE
2 EDWARDS 871P-G1 ADAPTAHORN PANEL MOUNT HORNS,NEW
AMADA THICK TURRET 3″X 1/4″FORM UP LOUVER PUNCH
2 SETS STRIPPIT OBROUND PUNCHES&DIES,WILSON,1-1/4″
CROSCHOPP PM8014 DC MOTOR,99 WATT,24VDC,2300 RPM
AMADA THICK TURRET 1-3/4″X.500″FORM UP LOUVER PUNCH
3 FESTO PNEUMATIC SOLENOID VALVES,MFH-3,MF?H-5
STRIPPIT 2.750 ROUND PUNCH&DIE SET,3-1/2″STYLE
RELIANCE ELECTRIC P56H1795P AC MOTOR,1/2HP,FB5?6C
STRIPPIT 3.125″ROUND PUNCH&DIE SET,3-1/2″STYLE
3 WILSON THICK TURRET ROUND KEYED PUNCHES&DIES
A.O.SMITH 22246100 VARIABLE SPEED DC MOTOR,1/2HP,56C
5 WILSON THICK TURRET SINGLE D/D PUNCHES&DIES.437+
STRIPPIT 1.259 X 1.709 SINGLE-D PUNCH&DIE SET
STRIPPIT 3.437″ROUND PUNCH&DIE SET,3-1/2″STYLE
AMADA THICK TURRET 2-15/16″X5/8″FORM UP LOUVER PUNCH
100’DEARBORN CDT TGGT HIGH TEMPERATURE WIRE,10AWG
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