Thomson
Thomson Electrak
®
LL Actuator - Installation Manual - 2020-11 11
4.5.5 Inrush current
At the start of the actuator there is an inrush current to the motor that will last between 75 to 150
milliseconds. See below table to determine the inrush current for the control option being used.
If using an AC powered power supply it must be sized to handle the inrush current (batteries
typically have no problem delivering the inrush current). Also contacts, switches and relays must
be sized appropriately to be able to handle the inrush current.
4.5.6 Brake resistor
If the unit is to operate with a helping load (pulling load) that are above 50% of the rated maximum
load, the unit must be equipped with a brake resistor (also see section 4.6.3). The resistor must have a
resistance between 2.3 - 3.3 Ohm and be able to handle at least 100 W.
Installation
Control Option Inrush Current Level
Option Inrush current
LEX up to 1.5 × rated current for the actuator model and load in question
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