Altistart 48 Enclosed Altistart 48 Soft Starters Page 12 Functions

12 Altistart 48 soft starters for asynchronous motors Advanced Adjustment Functions Functions (continued) Advanced adjustment functions Torque limit Used primarily for high inertia and constant torque conveyor applications, this function restricts the torque ramp reference to the preset value. For example, the function can be used to limit the torque to a constant value throughout the starting period. Adjustment range: 10% to 200% of the nominal motor torque. Voltage boost level This function can be used to avoid any "starting" torque (phenomenon caused by friction on stopping or by mechanical play). When a run command is sent, the soft starter applies a fixed voltage to the motor for a limited period of time before starting. The function can be disabled. The voltage setting value varies between 50% and 100% of the nominal motor voltage. Test on low power motor This function can be used to test a starter on a motor with a much lower power than the soft starter. It can be used, for example, to check the electrical wiring of a device. The function is automatically cancelled when the soft starter is switched off. The next time the soft starter is switched on, the soft starter returns to its initial configuration. Activation of the cascade function This function can be used to start and decelerate several cascaded motors with a single soft starter. In order to gain maximum benefit from torque control, it is advisable to use motors with power ratings between 0.5 and 1 times the power of the soft starter. Line frequency The following frequencies can be selected for this function: 50 Hz. The frequency fault monitoring tolerance is 20%. 60 Hz. The frequency fault monitoring tolerance is 20%. Automatic detection of the line frequency by the soft starter. The frequency fault monitoring tolerance is 6%. 50 Hz and 60 Hz are recommended if the power supply is provided by an emergency standby generator set, given their high tolerance. Reset kW/h or the operating time Sets the value of the power in kW/h or the operating time value to 0. The calculation of the values is updated once the reset command has been sent. Return to factory settings This function can be used to reset each setting to its initial value (soft starter factory settings, see page 13). 50 % Vn 100 ms 100 % Vn t T DOL Rampe de couple Torque ramp Application of a voltage boost equal to 100% of the nominal motor voltage

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