Rockwell Automation 294D ArmorStart LT Distributed Motor Controller DeviceNet Version - User Manual - Manual (Page 28)

28 Rockwell Automation Publication 290D-UM001A-EN-P - June 2012
Chapter 1 Product Overview
Motor Circuit
The ArmorStart LT Distributed Motor Controllers are rated to operate the
following types of three-phase squirrel-cage induction motors:
Bulletin 290D/291D:
0.5 Hp (0.37 kW) to 5 Hp (3 kW) @ 480/277V AC
Bulletin 294D:
0.5 Hp (0.37 kW) to 2 Hp (1.5 kW) @ 480/277V AC
Local I/O
The ArmorStart LT provides as standard, 6 user configurable I/O points. By
default, all points are configured as an Input. The user will need to refer to
parameter 49 [IOPointConfiguration], to define an output point.
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 LTs overload protection is
programmable via the communication network, providing the user with greater
flexibility.
The Bulletin 290D/291D includes programmable overload Class 10, 15, and 20
protection. The Bulletin 294D provides overload protection: 150% for 60 s and
200% for 3 s.
Refer to Chapter 6 , Specifications, for additional information.
Mode of Operation
Bulletin 290D/291D 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 290D offers full-voltage starting and Bulletin 291D 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.