S&C LS-2 Operating Instructions Manual
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S&C LS-2 Operating Instructions Manual

S&C LS-2 Operating Instructions Manual

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S&C Type LS-2 Switch Operators★

Table of Contents

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★ S&C Type LS-1 Switch Operators were discontinued in 2024 . For more
information, contact your local S&C Sales Office .
February 17. 2025
© S&C Electric Company 1978-2025, all rights reserved
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Instruction Sheet 753-501
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  • Page 1: Table Of Contents

    S&C Type LS-2 Switch Operators★ Operation Table of Contents Introduction Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

  • Page 2: Introduction

    5 . The latest version of this publication is available online in PDF format at sandc . com/en/contact-us/product-literature/ . Retain this This instruction sheet is a permanent part of Type LS-2 Switch Operators. Designate a location where users can easily retrieve and refer to this publication. Instruction Sheet...

  • Page 3: Safety Information

    1-888-762-1100. NOTICE Read this instruction sheet thoroughly and carefully before operating Type LS-2 Switch Operators . Replacement If additional copies of this instruction sheet are required, contact the nearest S&C Sales Office, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.

  • Page 4: Location Of Safety Labels

    Safety Information Location of Safety Labels Reorder Information for Safety Labels Location Safety Alert Message Description Part Number CAUTION G-6251 Use pushbuttons to open or close the switch ..NOTICE G-3733R2 The S&C Instruction Sheet is a permanent part of your S&C Equipment ..NOTICE Auxiliary switch cams are individually adjustable .

  • Page 5: Safety Precautions

    Safety Precautions DANGER Type LS-2 Switch Operators operate at high voltage . Failure to observe the precautions below will result in serious personal injury or death . Some of these precautions may differ from your company’s operating procedures and rules .

  • Page 6: Operation

    2.2 seconds maximum. It is expressly designed for power operation of Line-Rupter Switches. Because of its high-speed operation, the Type LS-2 Switch Operator is not suitable for use with switches from other manufacturers. Before operating the Type LS-2 Switch Operator, become familiar with the parts of the switch operator as shown in Figure 2 on page 7 and Figure 3 on...

  • Page 7: Electrical Operation

    Operation Electrical Operation To open or close the switch electronically: Unlock and lift the external pushbutton protec- STEP 1 . tive cover. ● Press the appropriate pushbutton. STEP 2 . ■ Figure 2. Note: The switch operator may be activated by oper- ating associated, remotely located control switches.

  • Page 8: Manual Operation

    Operation Manual Operation To open the switch manually, follow these steps: Pull the latch knob on the hub of the manual STEP 1 . WARNING operating handle and pivot the handle forward slightly from its Storage position. Manually closing an energized switch is not recommended because of the possibility of closing Release the latch knob while continuing to STEP 2 .

  • Page 9: Post-Operation Inspection

    Operation from the control power source by removing The high-voltage switch-position indicator, STEP 2 . the motor-circuit two-pole pull-out fuse- located on the switch-operator output shaft is holder located on the right inside wall of the in agreement with the switch-operator position enclosure.

  • Page 10: Using The Selector Handle (Coupling And Decoupling)

    Operation Using the Selector Handle (Coupling and Decoupling) Selector handle being turned The external selector handle, for operation of the built-in to the Decoupled position internal decoupling mechanism, is located on the right side of the switch-operator enclosure. To decouple the switch operator from the switch: Swing the selector handle upright and slowly STEP 1 .
  • Page 11 Operation To couple the switch operator to the switch: Swing the selector handle upright and rotate STEP 3 . it counterclockwise to the Coupled position. Manually operate the switch operator to STEP 1 . Lower the handle to engage the locking tab. bring it to the same Open or Closed position The selector handle is now in the Coupled as the high-voltage switch, as indicated by...

  • Page 12: Inspection And Maintenance

    Remove the four 5/10–18 × 11/4-inch screws STEP 5 . used to attach the motor, withdraw the motor, Type LS-2 Switch Operators should be inspected every and carefully rest its shaft on the floor of the 2500 operations or 5 years, whichever occurs first, to enclosure.
  • Page 13 Inspection and Maintenance Motor shaft square key Linkage rod Pad assembly socket-head set screw ( -inch Allen wrench required) Brake disc Brake lever Angle bracket ¼ –20 1¼ -inch -inch socket-head hex-head screw recess for adjusting pad assembly Spacer bushing Pad assembly Caliper assembly DETAIL A...

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