Automation Direct Stellar SR55 Series User Manual

Chapter 2: Electrical Installation
Page 2–5Stellar
®
SR55 Series Soft Starter User Manual – 1st Ed, Rev F – 09/18/2019
moTor overload proTeCTion
The SR55 soft starter provides full motor overload protection, which can be configured
through the touch screen. Overload trip settings are determined by the Motor Current setting
and the Trip Class setting. Trip class choices are Class 10, Class 20, and Class 30. The SR55 soft
starters are protected using full I
2
T motor overload with memory.
Trip time ( seconds )
Multiple of Motor FLA
Motor overload 'cold' trip curves
(20°C ambient)
WIRe sIzes ANd ToRques
SR55 Wire Sizes and Torques
Terminal Models
Wire Size Torque
mm
2
AWG N·m lb·in
Main
Terminals
Cu STR
75°C Only
Terminal
SR55-017 to SR55-096
2.5–70 12–2/0 9 80
SR55-124 to SR55-180
4–185 12–350 MCM
14 123
M10 bolt
SR55-242 to SR55-361
2 x 95 2 x 2/0
SR55-414 to SR55-477
2 x 150 2 x 350 MCM
Control Terminals all models
0.2–1.5 24–16 0.5 4.5
Protective
Ground *
Cu Only
M6 stud
SR55-017
≥ 4 ≥ 12
8 70
SR55-021 to SR55-052
≥ 6 ≥ 10
SR55-065 to SR55-096
≥ 10 ≥ 8
M8 stud
SR55-124 to SR55-180
≥ 16 ≥ 6
12 105
SR55-242
≥ 25 ≥ 4
SR55-302 to SR55-361
≥ 35 ≥ 3
SR55-414 to SR55-477
≥ 35 ≥ 2
* Protective Ground wire size based on bonding conductor requirements of UL508 and UL508A

Automation Direct Stellar SR55 Series Specifications

General

Brand	Automation Direct
Model	Stellar SR55 Series
Category	Controller
Language	English