VFD-F (CURVE).cdr

VFD-F Series5.7 Group 6: Protection Function Parameters06 - 00 Over-voltage Stall Prevention Factory Setting: 390.0/780.0Settings 230V series: 330.0 ~ 410.0VDC460V series: 660.0 ~820.0VDC00: Disable This parameter selects the voltage level for the Over-Voltage Stall Prevention function. During decelerations, the DC bus voltage may exceed its maximum allowable value due tomotor regeneration. When this function is enabled, the AC drive will stop decelerating andmaintain a constant output frequency. The AC drive will only resume deceleration when thevoltage drops below the preset value. With moderate inertial loads, the over-voltage stall prevention will not occur and thedeceleration time should be equal to Pr.1-10. With high inertial loads, the AC drive willautomatically extend the deceleration time due to the step function shown below. If thedeceleration time is critical for the application, then dynamic brake resistors should beused.Output frequencyDeceleration characteristicwhen Over-voltage stallprevention enabledFrequency heldTimeDeceleration Time06 - 01 Over-current Stall Prevention during Acceleration Factory Setting: 120Settings 20~150% Unit: 1 This parameter selects the percentage of allowable over-current during acceleration beforethe stall prevention is enabled. During acceleration, the AC drive output current may increase abruptly and exceed thevalue specified by Pr.06-01 due to rapid acceleration or excessive load on the motor. Whenthis function is enabled, the AC drive will stop accelerating and maintain a constant outputfrequency. The AC drive will only resume acceleration when the current drops below thevalue set in Pr.06-01 (please see the graph below). When the over-current stall prevention is activated, the acceleration time of the AC drive willbe longer than the time set in Pr. 01-09.5-30 DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED