Today’s drive solutions require powerful and flexible instruments. The compact motor starter P-4.0 from TELE can be used for motors up to 4.0kW @ 400V and includes 5 functions in one compact unit, requiring only 22,5mm width. This intelligent instrument offers soft start, soft stop, forward/reverse, current protection and an electronic motor protection. Offering the integrated motor protection plus isolation relays the use of an MCB is no longer necessary.
A simple circuit breaker protects the installation against short circuit and faulty wiring. The soft start and stop function is performed by semiconductors (thyristors) and the reversing function by internal relays, operated in the standstill phase. After performing the start/stop function the semiconductors are bypassed by integrated relays to minimize power dissipation. The intelligent combination of semiconductors and relays increases lifetime and efficiency of the product. The integrated current limit protects motors, shafts and plants from mechanical stress and reduces maintenance and standstill times.