ABB ACS880+N5350 - Chapter 10 Additional Setup; 10.1 Trickle Current Heating

Additional Setup 10-13AXD50000011888
Chapter 10
Additional Setup
Once the motor has been identied to the drive and the operating mode chosen, the drive is ready to operate. Additional
setup may be desired to enable trickle current heating when not running, for set up of skip frequencies during operation,
and/or enabling De-Ice control function.
10.1 Trickle Current Heating
Trickle Current Heating is a feature of the ACS880+N5350 that can be used by the customer to maintain a small amount
of power going to the motor from the drive while the fan is not being used. This feature will not cause fan rotation and aids
in eliminating moisture in the motor. This eliminates the need for motor space heaters which are normally specied when a
motor is placed in a humid environment.
Trickle Current Heating is disabled as a factory default since it depends on motor related information. Once enabled, trickle
current will start owing in the motor windings after the fan has been stopped. Note that the drive trickle current enable
signal on XDIO1 must be present for trickle current to ow and (74.01) Trickle Current Enable = 1. Should the motor be
restarted at any time (before or after the timer has expired) trickle currrent will immediately stop and the motor will start
normally. In other words, the Run Command has priority over Trickle.
The below chart has traditionally been used to size space heaters for various frame motors and is equally applicable to
deciding how much trickle current to the motor.
Table 10-1
Motor Frame Size Wattage
FL250 75
FL280 100
FL320 125
FL360 150
FL400 175
FL440 225
FL5800 400
In addition to the wattage from the above table, the motor stator resistance value is needed. The stator resistance is taken
from parameter 98.09 Rs user SI after ID run is complete.
Utilize the below calculation to check the trickle current value:
Wattage from Table 10-1
3 x Stator R
Trickle Current =
The wattage from the above table can then be programmed into parameter 74.02 (Trickle Power). This will enable trickle
current to ow in the motor after it has been stopped for time set in parameter 74.03 Trickle Delay Time. Note that the
customer is limited to a current value that is no more than 100% of the motor rated current so that there is no danger in
overheating the motor.
Should the motor be restarted at any time (before or after the timer has expired) trickle current will immediately stop and the
motor will start normally.
Trickle current will not work while the motor is in Local, Trickle must be stopped before motor will start in Custom mode.