Product Details
Product Description
Product Description
Focus on DCS, PLC, robot control system and large servo system.
Main products: various modules / cards, controllers, touch screens, servo drivers.
Advantages: supply of imported original products, professional production parts,
Fast delivery, accurate delivery time,
The main brands include ABB Bailey, Ge / fuanc, Foxboro, Invensys Triconex, Bently, A-B Rockwell, Emerson, ovation, Motorola, xyvom, Honeywell, Rexroth, KUKA, Ni, Deif, Yokogawa, Woodward, Ryan, Schneider, Yaskawa, Moog, prosoft and other brands
TTo ensure the EMC (Electro Magnetic Compatibility) the housing must be grounded by a low impedance galvanic connection to the grounding system. As it is shown in the figure, an appropriate cable connection, which is fixed from a specific screw on the housing to the grounding system in the LV compartment, must be foreseen. That is why an interweaving cable is used for the grounding connection. If, due to the installation construction, the low impedance connection from the housing to the grounding system is already given, the additional grounding connection by the interweaving cable can be abstain from. The housing of the HMI Local Control Unit must also be grounded too. As can be seen in the next figure, a specific grounding cable is to be connected from the housing of the HMI Local Control Unit to the grounding system in the LV compartmen. REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 23 / 80 Figure 5: Grounding of the REF542plus HMI Local Control Unit 4.2.6 Typical examples of analog and binary connections The following pages show examples for wiring analog inputs (measuring inputs) on the REF542plus with sensors or transducers, binary I/Os and analog output boards. Typical examples of usage in practice will be shown here. The following symbols are used in the circuit diagrams: Table 10: Graphical symbols for electric diagram (IEC 60617) Symbol Legend Symbol Legend Energy flow from the bus bar Ring core current transformer Energy flow towards the bus bar Make contact Mechanical, pneumatic or hydraulic connection (link) Break contact Earth, ground Change-over break before make contact Conductors in a screened cable Position switch, break contact Twisted conductors Circuit breaker Connection of conductors Disconnector Plug and socket male and female) Operating device REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 24 / 80 Symbol Legend Symbol Legend Resistor with one fixed tapping Fuse Current transformer Sensing element Three-phase transformer Current sensing element Voltage transformer Optical fibre cable 4.2.7 Connection Example of the REF542plus Analog Inputs Figure 6: Example of connection diagram for incoming or outgoing bays with transformers REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 25 / 80 Figure 7: Example of connection diagram for incoming or outgoing bays with sensors REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 26 / 80 Figure 8: Example of connection diagram for bus-tie and measuring bays with transformers REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 27 / 80 Figure 9: Example of connection diagram for bus-tie and measuring bays with sensors Caution Due to accuracy requirements the length of the cable connection to the sensors in other bay respectively panels should be less than 7 m REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 28 / 80 Figure 10: Example of connection diagram for the transformer differential protection with transformers Caution Due to accuracy requirements the length of the cable connection to the sensors in other bay respectively panels should be less than 7 m REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 29 / 80 Figure 11: Example of connection diagram for the transformer differential protection with sensors REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 30 / 80 Figure 12: Example of connection diagram for the synchronism check with transformers REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 31 / 80 Figure 13: Example of connection diagram for the synchronism check with sensors Caution Due to accuracy requirements the length of the cable connection to the sensors in other bay respectively panels should be less than 7 m REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 32 / 80 Figure 14: Example of connection diagram for the synchronism check with transformers REF 542plus switchbay protection and control unit Manual Part 3: Installation and Commissioning 1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 33 / 80 Figure 15: Example of connection diagram for the synchronism check with sensors Caution Due to accuracy requirements the length of the cable connection to the sensors in other bay respectively panels should be less than 7 m REF
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