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TCI, CI-tronic™ torque limiters

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6 Item(s)

FAQ

How do I select the correct soft starter?
- Answer: First you have to keep in mind that a soft starter reduces the starting current. You must select a softstarter which supplies adequate current to ensure smooth operation of the motor or application. Please consider the number of starts per hour and the ambient temperature and also the necessary monitoring and control functions.
Do soft starters have any internal protection?
- Answer: No, they do not have any protection. You need to use a circuit breaker before the soft starter, or use fuse and contactor with thermal relay, which ensures protection againts overloads and short-circuit.
What is maximum overload current of soft starters?
- Answer: Maximum overload current for soft starters is 6xIn or 8xIn (where In is nominal current). For more details (duty ratio, number of cycles/hour, time between each start operation) please refer to overload current profile in our technical brochure.
What is trip class?
- Answer: Trip class is the expression used in connection with the designation and current settings of overload relays and soft starters. The most popular are 10A and 10 trip classes. They are suitable for light/standard duty applications. Trip class corresponding to minimum overload current withstand time. For example: Class 10A = overload ratio 8 (8 times nominal current) for 1.6 seconds; Class 10 = overload ratio 8 for 3 seconds.
What is the maximum starts and stops of my TCI softstarter?
- Answer: The TCI softstarter range has unlimited start/stop operations per hour.
Why do we bypass the soft starter in steady state?
- Answer: Bypass is important when the soft starter is working in temperature above 40 °C – in this case you don't have to reduce load or duty cycle when the soft starter is bypassed in steady state. Moreover bypass eliminates the electromagnetic disturbances EMC during the full voltage operation.