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Eaton DS7 Series Instructional Leaflet
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Eaton DS7 Series Instructional Leaflet

Eaton DS7 Series Instructional Leaflet

Soft start controllers
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Instructional Leafl et IL03901004E
DS7 series soft start controllers,
Frame 2 (16–32A)
Effective February 2011
Introduction
Eaton's DS7 solid-state soft start controller is an
electronic, self-contained panel- or enclosure-
mounted motor soft-starting device. It provides
three-phase induction motors with a smooth start,
both mechanically and electrically. The DS7 line
uses four silicon-controlled rectifiers (SCRs) that
are connected in a full wave-power bridge on two
phases. The voltage and current applied to the
motor are controlled by varying the SCR conduc-
tion period. This, in turn, controls the torque devel-
oped by the motor. After the motor reaches speed,
a bypass relay is energized to bypass the SCRs.
The DS7 is designed to fulfill the industrial service
requirements of applications such as chiller start-
ers, pump panels, and machine tools. This device
meets all relevant specifications set forth by UL
508, IEC 60947-4-2, CE, C-Tick, and CSA .
This leaflet covers basic installation and setup. No
publication can take into account every possible
situation. If you require further assistance with any
aspect of this product or a particular application,
contact Eaton.
Inspection
General
Upon receipt of the unit, verify that the catalog
number and unit options stated on the shipping
container match those stated on the order/
purchase form.
Inspect the equipment upon delivery. Report any
carton damage to the carrier prior to accepting the
delivery. Have this information noted on the freight
bill. Eaton is not responsible for damage incurred
in shipping.
Unpacking
Remove all packing material from the unit. Be
sure to remove all packing material from the
lug location.
Check the unit for any signs of shipping damage.
If damage to the product is found after unpacking,
report it to the freight company. Retain the packing
materials for the carrier to review.
Verify that the unit's catalog number and options
match those stated on the order/purchase form.

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Summary of Contents for Eaton DS7 Series

  • Page 1 Effective February 2011 DS7 series soft start controllers, Frame 2 (16–32A) Introduction Eaton’s DS7 solid-state soft start controller is an electronic, self-contained panel- or enclosure- mounted motor soft-starting device. It provides three-phase induction motors with a smooth start, both mechanically and electrically. The DS7 line...

  • Page 2: Mounting Instructions

    Instructional Leafl et IL03901004E DS7 series soft start controllers, Frame 2 (16–32A) Effective February 2011 Storage Table 2. Environmental requirements Description Requirement It is recommended that the unit be stored in its original shipping Operating temperature 32° to 104°F (0° to 40°C) up to 140°F (60°C) with box/crate until it is to be installed.
  • Page 3 DS7 series soft start controllers, Frame 2 (16–32A) Instructional Leafl et IL03901004E Effective February 2011 Product selection—horsepower ratings Please refer to Application Note AP03901006E for additional information on proper size selection. Table 4. 10 second ramp, one start per hour, 300% current limit at 40°C...

  • Page 4: Control Wiring

    Instructional Leafl et IL03901004E DS7 series soft start controllers, Frame 2 (16–32A) Effective February 2011 Control wiring Control wiring is connected to the DS7 soft start controller on the front of the unit. Use the wiring diagrams in Figure 3, Figure 4, and the sizing/torque information in Table 10 as guides.
  • Page 5 DS7 series soft start controllers, Frame 2 (16–32A) Instructional Leafl et IL03901004E Effective February 2011 Operations Adjusting the soft start controller parameters 24 Vac/Vdc, 110/230 Vac control voltage is applied to terminal U There are three adjustments to the DS7 soft start controller: •...
  • Page 6 Instructional Leafl et IL03901004E DS7 series soft start controllers, Frame 2 (16–32A) Effective February 2011 LED operation and troubleshooting In the event of a motor stop due to a trip condition by the soft start controller, the FAULT status LED will be illuminated (flashing). In this The operation, warning, and fault status of the controller may be case, one or more conditions found in Table 13 may have occurred.
  • Page 7 DS7 series soft start controllers, Frame 2 (16–32A) Instructional Leafl et IL03901004E Effective February 2011 Table 15. Warning indications Status Condition Action Start without enable GREEN—1x/s, pulse 1/2s RUN command is issued without a Apply Enable signal at terminal EN.
  • Page 8 Technical Resource Center at (877) 386-2273 or visit our Web site at www.eaton.com. Service and repair is available from Eaton or several factory authorized regional service centers. Please contact Eaton’s Product Integrity Center at (800) 345-0434 for the location nearest to you.