VLT ® 2900 Series X L can be set as follows: NB! If the value in par. 144 is increased, the motor current will simultaneously increase significantly when generator loads are ap- plied. The parameter should therefore on- ly be changed if it is guaranteed during measurement that the motor current in all operating situations will never exceed the maximum permitted current in the motor. Please note : that the current can- not be read out from the display. 1. The value is stated by the motor supplier. 2. Use the factory settings of X L which the fre- quency converter itself chooses on the basis of the motor nameplate data.
Automatic (automatic) [0] Always switched on (always on) [1] Always switched off (always off) [2] This parameter can be set so that the internal fan is automatically switched on and off. You can also set the internal fan to be permanently switched on or off. *Off (OFF) [0] Reset (RESET) [1] When the voltage vector is reset it is set to the same starting point each time a new process commences. If Automatic [0] is selected, the internal fan is switched on or off depending on the ambient temperature and the loading of the frequency converter. If Always switched on [1] Always switched off [2] are selected, the internal fan will be permanently switched on or off.
Select reset (1) when running unique processes each time they arise. This will enable repetitive precision when stopping to be improved. Select Off (0) for ex- ample for lifting/lowering operations or synchronous motors. It is an advantage that the motor and the fre- quency converter are always synchronized. NB! If Always switched off [2] is selected in combination with high switch frequency, long motor cables or high output power, the frequency converter's life span is re- duced. 1.00 - 1.50 This parameter is used to set the AC brake. Using par.
144 it is possible to adjust the size of the generator torque that can be applied to the motor without the in- termediate circuit voltage exceeding the warning level. 1.30 The value is increased if a greater possible brake tor- que is required. If 1.0 is selected, this corresponds to the AC brake being inactive. = factory setting, () = display text, [] = value for use in communication via serial communication port 28 MG.29.A3.02 - VLT ® is a registered Danfoss trademark Description of choice: 143 Internal fan control (fan control) Value: 146 Reset voltage vector (RESET VECTOR) Value: Function: Function: Description of choice: Description of choice: 144 Gain AC brake (Gain AC brake) Value:
Function: Description of choice: