VLT ® 2000 Series I 308 DC brake voltage (DC-BRK VOLTAGE) Value: 0 - 50 V ✭ 10 V I 310 Trip delay at current limit (TRIP DLY @ C.LIM) Value: 0 - 60 sec. ✭ Infinite at 61 Description of parameters Function: Using this parameter you can record the DC brake voltage for the motor. Function: Using this parameter you can record how long the current limit may be active before trip. Description: The size of the voltage depends on the motor size. The bigger the motor the lower the DC brake voltage. Description: Record the delay time. Warning: At frequent DC-braking the DC brake voltage should not be too high. This is to avoid motor overload. The DC brake voltage must be > 0 to activate DCbraking.
Warning:If you choose Infinite , and your load is between 105% and 160%, trip may occur after a given interval. I 315 Motor thermal protection (MOTOR THERMAL) Section 1 Section 2 Section 3 I 309 Reset mode (RESET MODE) Value: ✭ Manual reset (MANUAL) [0] Auto reset 1 (AUTORESET 1) [1] Auto reset 5 (AUTORESET 5) [5] Value: ✭ Off (PROTECT OFF) [0] Only warning (ONLY WARNING) [1] Trip (TRIP) [2] Function: The VLT frequency converter calculates if the motor temperature exceeds the limits allowed. The calculation is based on 1.16 x rated motor current at rated fre-quency (parameter 107). Function: Using this parameter you can choose how you want to reset an alarm. Description:
If you choose Manual reset you must reset the VLT frequency converter via the keyboard or via terminals 19, 27 or 29. The display shows TRIP. If you choose Auto reset 1 the VLT frequency conver- ter will automatically try to reset once after alarm. The display shows AUTO START As long as the display shows AUTOSTART the unit will try to reset every 20 minutes. If you choose Auto reset 5 the VLT will automatically try to reset 5 times after alarm. The display shows AUTO START. Description: Choose Off if you do not want any display indication of either warning or trip. Choose Only warning if you want display indication for motor overloaded.
You can also program the frequency converter to give a warning signal via the signal outputs (parameters 408 and 409). Choose Trip if you want warning and trip to be displayed. Warning: The motor may start without warning, if Auto reset selected. ✭ = Factory setting. Text in ( ) = Display text. The figures in [ ] are used in bus communication. MG.20.B6.02 – VLT is a registered Danfoss trademark 71