Page 1–4 Stellar
®
SR55 Series Soft Starter User Manual – 1st Ed, Rev F – 09/18/2019
Chapter 1: Mechanical Installation
Mechanical Specifications
MECHANICAL SPECIFICATIONS – SR55 Series Full-Featured Soft Starters
Model
SR55
-017
SR55
-021
SR55
-027
SR55
-034
SR55
-040
SR55
-052
SR55
-065
SR55
-077
SR55
-096
Frame Size
1
Heat Output (W)
25�5 31�5 40�5 51�0 60�0 78�0 97�5 116 144
Weight (lb [kg])
6�6 [3�0] 7�7 [3�5]
Model
SR55
-124
SR55
-156
SR55
-180
SR55
-242
SR55
-302
SR55
-361
SR55
-414
SR55
-477
–
Frame Size
2 3
–
Heat Output (W)
186 234 270 363 453 542 621 716
Weight (lb [kg])
12�1 [5�5] 14�3 [6�5] 35�3 [16�0] 46�7 [21�2]
Model All SR55 models
Ambient Operating
Temperature
-20°C [-4°F] to 50°C [122°F] ; above 50°C derate linearly by 4% of SR55 I
e
per °C
to a maximum of 60°C (140°F)
Transportation and
Storage Temperature
-20°C to 60°C [-4°F to 140°F] continuous
Humidity
max 85% non-condensing, not exceeding 50% @ 40°C [104°F]
Maximum Altitude
1,000m [3281ft] ; above 1000m derate by 1% of SR55 I
e
per 100m (328ft)
to a maximum altitude of 2,000m (6562ft)
Environmental Rating
Main Circuit: IP00 (IP20 with optional finger guards for sizes 1&2 only);
Control Circuit: IP20; No corrosive gases permitted
Dimensions
( in [mm] )
Frame Size 1: SR55-017 – SR55-027
Mount soft starter within 30° of vertical
Minimum Clearance Distance
Top
3in
[75mm]
Bottom
Left
1in
[25mm]
Right
Front
NOTE: The addition of optional
finger guards to size 1 and
size 2 SR55 soft starters adds
approximately 14mm [0.5in] to the
vertical dimension, but does NOT
change the clearance distance.
Frame Size 1: SR55-034 – SR55-096
Mount soft starter within 30° of vertical
Minimum Clearance Distance
Top
3in
[75mm]
Bottom
Left
1in
[25mm]
Right
Front
NOTE: The addition of optional
finger guards to size 1 and
size 2 SR55 soft starters adds
approximately 14mm [0.5in] to the
vertical dimension, but does NOT
change the clearance distance.
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