30 Rockwell Automation Publication 290E-UM001B-EN-P - June 2012
Chapter 1 Product Overview
Overload Protection
The ArmorStart LT Distributed Motor Controller incorporates, as standard,
electronic motor overload protection. This overload protection is accomplished
electronically with an I
2
t algorithm. The ArmorStart LT’s overload protection is
programmable via the communication network, providing the user with greater
flexibility.
The Bulletin 290E/291E includes programmable overload Class 10, 15, and 20
protection. The Bulletin 294E provides overload protection: 150% for 60s and
200% for 3s.
Refer to Chapter 6
, Specifications, for additional information.
Mode of Operation
Bulletin 290E/291E
Full-Voltage Start
This method is used in applications requiring across-the-line starting, in which
full inrush current and locked-rotor torque are realized. The ArmorStart LT
Bulletin 290E offers full-voltage starting and Bulletin 291E offers full-voltage
starting for reversing applications, from 0.5 Hp (0.37 kW) to 5 Hp (3 kW) at
480Y/277V AC, 3-phase power.
Figure 11 - Full-Voltage Start
100%
Percent
Voltage
Time (seconds)
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