Motors play a very important role in running of processes. A starter provides a means of safely starting and stopping of the motors and protection from short circuit and overload. In conventional starters, this protection is provided by means of a fuse and an overload relay respectively. Being mechanical devices, they have known limitations compared to the accuracy and reliability provided by electronic relays. Protection is provided to a motor primarily to prevent the loss of production, higher maintenance costs and unsafe conditions in a process, rather than saving the motor itself, which is inexpensive.
About 50% of motor tripping’s can be prevented by monitoring power and loading. Other failures can be prevented by having an effective asset management system. It is, therefore, necessary to have an “intelligent” protection system, which can monitor the power supply and loading, identify the potential risks and send warnings and alarms to the maintenance staff. The system should also be able to monitor and record motor parameters and operating parameters such as the running hours and the number of starts/ stops that can help in carrying out timely preventive maintenance. The system should also have capability to transmit the real time parameter data and receive control orders through network protocols widely used in industrial automation.
It has been found that over 90% of the motors in a typical process plant are up to 15 KW rating. Schneider offers complete intelligent motor starter unit” Tesys U” for motors up to 15 KW rating. For motors beyond 15 KW, rating Schneider offers intelligent motor relay “Tesys T” which is used along with a conventional motor starter. Up to 75KW motors; Tesys T has integral CTs. beyond 75 KW external CTs are required for measurement. Where variable speed, soft starting and stopping is required, Schneider offers Altivar range of VFDs and Altistart range of soft-starters with advanced features and communication options. For power control, Schneider offers “NSX” range of intelligent MCCBs from 100A to 1200A, having integral measurement and communication. “Masterpact” ACBs with intelligent Micrologic E relay are available from 800A to 3200A.
The configuration and setting of all the above intelligent devices can be done with a PC or a laptop using “SoMove” software package, which is freely downloadable.
Tesys U consists of three components: Power Base, Control Unit and Communication Module as shown in the following diagram:
ser3
the power base is available in two models – up to 12A (5.5.KW) and up to 32A (15KW). Control Unit is available in three versions – Standard, Advanced and Multifunction. Communication module is available with widely used industrial protocols such as ASI, Modbus, Canopen, Profibus, and Devicenet etc.
Randomised words which don’t look even slightly believable. If you are going passage of you need sure there anything make a type specimen book. It has survived not only five centuries.
Randomised words which don’t look even slightly believable. If you are going passage of you need sure there anything make a type specimen book. It has survived not only five centuries.
Supertech chat support welcomes you. Don't hesitate to reach out to our support team if you have any questions or concerns.
