Operating “inside the delta – Magnetek 188-10130 User Manual
Page 19

RVS-DX, Digital Soft Starter Instruction Manual—04/01/04
3-5
Operating “Inside the Delta”
Using the RVS-DX soft starter “inside the delta” reduces the required soft starter rating by 1.73 (
√3)
factor. For example, for a 150 amp, 460 volt motor, the RVS-DX-170-D is selected to operate in
standard “line” mode. However, for “inside the delta” mode (150 amp
÷1.73=87 amps), the RVS-
DX-105-D can be selected, thereby, reducing cost and physical space in the application.
The following programming parameters are disabled, once the ‘inside the delta’ is selected:
•
Pulse Start
•
Pump Curve selection (only standard curve available)
•
Slow Speed and Slow Speed Reverse
•
Phase Sequence
The motor rating for standard “Line” and “Inside the Delta” connections are show here:
HP Ratings are approximate. The RVS-DX should always be sized by the motor full load amps for
“line” starting and the motor FLA/1.73=soft starter FLA for “inside delta”.
Model Number
RVS-DX FLA
HP at 460V for
“Line”
HP at 460V for
“Inside Delta”
RVS-DX-8-D
8
5
7.5
RVS-DX-17-D
17
10
15
RVS-DX-31-D
31
20
32
RVS-DX-44-D
44
30
50
RVS-DX-58-D
58
40
68
RVS-DX-72-D
72
50
85
RVS-DX-85-D
85
60
100
RVS-DX-105-D
105
75
125
RVS-DX-145-D
145
100
170
RVS-DX-170-D
170
125
215
RVS-DX-210-D
210
150
250
RVS-DX-310-D
310
200
340
RVS-DX-390-D
390
300
515