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Lakeshore 26220 Installing, Operating And Maintaining

Automatic transfer switches
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INSTALLING, OPERATING AND MAINTAINING
AUTOMATIC TRANSFER SWITCHES
AS MANUFACTURED FOR
FLORIDA POWER & LIGHT
WITH ELECTROMECHANICAL CONTROLS
Lake Shore Electric Corporation
205 Willis Street
Bedford, OH 44146
Toll Free: 800-225-0141
Phone: 440-232-0200
Fax: 440-232-5644
Installation / Operation / Maintenance Manual
1
10/28/2019

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  • Page 1 INSTALLING, OPERATING AND MAINTAINING AUTOMATIC TRANSFER SWITCHES AS MANUFACTURED FOR FLORIDA POWER & LIGHT WITH ELECTROMECHANICAL CONTROLS Lake Shore Electric Corporation 205 Willis Street Bedford, OH 44146 Toll Free: 800-225-0141 Phone: 440-232-0200 Fax: 440-232-5644 Installation / Operation / Maintenance Manual 10/28/2019...
  • Page 2 DESCRIPTION DATE LAKE SHORE ELECTRIC Corp BEDFORD, OHIO U.S.A. STYLE 2 225A 2P 3Ø 4W 277/480V SCALE: DRN: CHK: APV: THIS DOCUMENT IS THE PROPERTY OF Lake Shore Electric Corporation. UNDER COPYRIGHT LAW, DISTRIBUTION AND REPRODUCTION OF THIS DOCUMENT, IN WHOLE OR IN PART, IS PROHIBITED WITHOUT PRIOR WRITTEN PERMISSION FROM Lake Shore Electric Corporation.
  • Page 3 DESCRIPTION DATE LAKE SHORE ELECTRIC Corp BEDFORD, OHIO U.S.A. STYLE 2 225A 3P 3Ø 4W 120/240V SCALE: DRN: CHK: APV: THIS DOCUMENT IS THE PROPERTY OF Lake Shore Electric Corporation. UNDER COPYRIGHT LAW, DISTRIBUTION AND REPRODUCTION OF THIS DOCUMENT, IN WHOLE OR IN PART, IS PROHIBITED WITHOUT PRIOR WRITTEN PERMISSION FROM Lake Shore Electric Corporation.
  • Page 4 DESCRIPTION DATE LAKE SHORE ELECTRIC Corp BEDFORD, OHIO U.S.A. FPL230400CI ATS 277/480VAC 3P 3Ø 4W 400A SCALE: DRN: --- --/--/-- CHK: --/--/-- APV: --/--/-- THIS DOCUMENT IS THE PROPERTY OF Lake Shore Electric Corporation. UNDER COPYRIGHT LAW, DISTRIBUTION AND REPRODUCTION OF THIS DOCUMENT, IN WHOLE OR IN PART, IS PROHIBITED WITHOUT PRIOR WRITTEN PERMISSION FROM Lake Shore Electric Corporation.
  • Page 5 LUG/CONNECTION DATA: Ø0.563 CURRENT RATING STANDARD LUG OPTIONAL LUG A) 400A: (1) 2/0-500MCM (1) 500-600MCM OR (2) 2/0-250MCM B) GROUND (1) #14-1/0 39.000 37.500 DESCRIPTION DATE LAKE SHORE ELECTRIC Corp BEDFORD, OHIO U.S.A. STYLE 2 400A 3P 3Ø 4W 277/480 SCALE: DRN: --- --/--/--...
  • Page 6 37.500 DESCRIPTION DATE LAKE SHORE ELECTRIC Corp BEDFORD, OHIO U.S.A. FPL230400CI ATS 277/480VAC 3P 3Ø 4W 400A SCALE: DRN: CHK: APV: --/--/-- --/--/-- --/--/-- THIS DOCUMENT IS THE PROPERTY OF Lake Shore Electric Corporation. UNDER COPYRIGHT LAW, DISTRIBUTION AND REPRODUCTION OF THIS DOCUMENT, IN WHOLE OR IN PART, 30.000 IS PROHIBITED WITHOUT PRIOR WRITTEN PERMISSION FROM Lake Shore Electric Corporation.
  • Page 7 WARNING! WHEN WORKING ON EQUIPMENT OF THIS TYPE, EXTREME DANGER OF ELECTROCUTION EXISTS THAT MAY RESULT IN INJURY OR DEATH. DO NOT ATTEMPT ANY REPAIRS OR ADJUSTMENTS TO THIS EQUIPMENT WITHOUT FIRST TAKING THE APPROPRIATE PRECAUTIONS TO PREVENT PERSONAL INJURY AND EQUIPMENT DAMAGE.
  • Page 8 WARRANTY Lake Shore Electric Automatic Transfer Switches are guaranteed against defective materials and workmanship for a period of one year from date of shipment. If, within one year after shipment, it is proved to Lake Shore's satisfaction that the equipment requires valid warranty work and Lake Shore is promptly notified of same, Lake Shore will make necessary corrections, free of charge.

  • Page 9: Table Of Contents

    Table of Contents CONSTRUCTION ....................................11 DESCRIPTION OF OPERATION..............................11 INSTALLATION ....................................12 3.1. MOUNTING AND CONNECTING ............................12 3.2. PLACING THE TRANSFER SWITCH IN OPERATION ....................12 OPERATING MECHANISM ................................14 4.1. GENERAL INFORMATION............................... 14 4.2. OPERATION ....................................14 4.3. REQUIRED MAINTENANCE ..............................14 4.4.
  • Page 10 PAGE INTENTIONALLY LEFT BLANK Installation / Operation / Maintenance Manual 10/28/2019...

  • Page 11: Construction

    CONSTRUCTION All of the molded case switches and/or circuit breakers are electrically interlocked through control relays and auxiliary switches, and mechanically interlocked through a walking beam mechanism which is located on the rear of the baseplate. This mechanism is a fulcrum and lever device which positively prevents both molded case switches or circuit breakers from being on the ON position simultaneously.

  • Page 12: Installation

    INSTALLATION 3.1. MOUNTING AND CONNECTING The standard Lake Shore transfer switch is designed for operation in a clean, dry, dust-free location where a minimum of vibration is present. Enclosed type transfer switches are general designed for wall mounting; however, it is possible to adapt other configurations.
  • Page 13 Do not attempt to energize the alternate (emergency) source until the switch is operating satisfactorily on normal. With the normal source operating, the emergency source may now be manually energized for testing. The emergency source including all safety interlocks should be checked over before an attempt is made at a complete automatic systems test. When the emergency source has been tested satisfactorily and de-energized, a test of the automatic system can now be tried.

  • Page 14: Operating Mechanism

    OPERATING MECHANISM 4.1. GENERAL INFORMATION The operating mechanism, pictured in Figure 1 (page 15). The motor (4) is a universal type, reversible motor and is shipped as a complete component including the gearbox. The gearbox is a sealed unit, which should never require maintenance or attention.
  • Page 15 LEGEND 1. Manual Handle 2. Drive Arms 3. Adjustment Screw 4. Motor 8. Drive Drums 9. Spring 10. Drive Shoe Pivot 11. Drive Drum Keys 12. Drive Shoe 13. Drive Shore Lining 17. Lever Arm Mounting Bracket Figure 1 Installation / Operation / Maintenance Manual 10/28/2019...

  • Page 16: Molded Case Switches

    MOLDED CASE SWITCHES 5.1. GENERAL INFORMATION The molded case switches used in transfer switches are the standard devices supplied by molded case switch manufactures. Figure 2 (page 16). Thermal magnetic or magnetic trip units may be installed (Accessory 23) for thermal overload and short circuit protection.

  • Page 17: Timing Relays

    TIMING RELAYS The following Timing Relays are used on Lake Shore Automatic Transfer Switches. Timing Relay Factory Setting Time of Delay Function 10 Seconds On Delay Time Delay to Transfer to Normal 10 Seconds Off Delay Time Delay to Transfer to Emergency 10 Seconds Off Delay Time Delay to Alarm Circuit...
  • Page 18 LAKE SHORE ELECTRIC SINGLE-PHASE STYLE The single-phase voltage sensing relays are adjustable to 70 to 100% of the voltage range selected. Indication of pickup or dropout can only be verified by attaching a continuity meter to the common and normally open terminals.

  • Page 19: Troubleshooting Guide

    TROUBLESHOOTING GUIDE This guide is intended to assist an individual with a basic understanding of electrical circuitry to troubleshoot an automatic transfer switch as manufactured by Lake Shore Electric Corporation. Any questions relating to the use of this Manual should be referred to the Service Department of Lake Shore Electric Corporation, 205 Willis Street, Bedford, Ohio 44146, Phone (440) 232-0200, Fax (440) 232-5644.
  • Page 20 diagrams should be on hand before beginning work on the switch. We recommend that the entire manual be read before attempting to make any adjustment. Above all, CAUTION is recommended. Many of the troubleshooting tests require a simulated failure of the normal source. This can be done with the Load Test Switch.
  • Page 21 II) AUTOMATIC TRANSFER SWITCH WILL NOT TRANSFER TO NORMAL Improper Utility Voltage Using an appropriately set voltmeter, check the utility voltage on terminals NL1 and NL2 and NL2 to NL3 and NL3 to NL1. If each set of readings indicate the utility line to line voltage, continue to Step 2. If the readings do not indicate proper line to line voltage, call the local utility.

  • Page 22: Appendixes

    APPENDIXES 9.1. APPENDIX A Tension Adjustment for Transfer Mechanism of Lake Shore Electric Transfer Switch Refer to Figure 1, Page 15 When excess slippage occurs in the friction drive, it is necessary to increase the tension on the friction drive shoe lining. Turn the adjustment screw (3) clockwise to increase the tension.
  • Page 23 9.2. APPENDIX B *FIELD CABLE SIZE & LUG TORQUE REQUIREMENTS USE COPPER WIRE ONLY LINE-LOAD-NEUTRAL UNLESS OTHERWISE SPECIFIED REQUIRED MAINTENANCE The following cable lug torques are required to be checked every six months in order to maintain the Lake Shore Electric Corporation exclusive "one year"...
  • Page 24 9.3. APPENDIX C INTERNAL MOLDED CASE TORQUE REQUIREMENTS REQUIRED MAINTENANCE The following lug torques are required to be checked every six months in order to maintain the Lake Shore Electric Corporation exclusive "one year" warranty. I. GENERAL ELECTRIC LUG TO MOLDED CASE SWITCH E150 LINE 30 IN.
  • Page 25 IV. GENERAL ELECTRIC TRIP TO MOLDED CASE SWITCH F225 LINE 75 IN. - LBS. J600 LINE 100 IN. - LBS. K1200 LINE 100 IN. - LBS. V. WESTINGHOUSE TRIP TO MOLDED CASE SWITCH JA KA DA KCL LB 6-8 FT. - LBS. MA MC 15 FT.

  • Page 26: Close Differential Undervoltage Protection

    Lake Shore accomplishes this by providing a close differential undervoltage sensing relay (Model 26220) on the normal supply as a standard feature in all automatic transfer switches. The design of the Lake Shore Electric Corporation 26220 relay offers more that the monitoring of an undervoltage condition.
  • Page 27 Figure 3 Figure 2 PROTECTION Undervoltage and voltage unbalance protection is necessary to prevent the harmful effects as described above. Undervoltage relays are typically of the close-differential type, that is, all three phases of the three-phase source must attain a value equal to, or greater than, the pickup setting of the undervoltage relay before its contacts change state.
  • Page 28 because the dropout point would have to be set so high it would cause nuisance undervoltage indications. Figure 5 Figure 4 The vertical line in Figures 4 and 5 indicates the protection undervoltage relays provide against voltage unbalance when it is calibrated for an 87% drop out.
  • Page 29 The Lake Shore undervoltage relay is also equipped with an inverse time delay on both “pickup” and “dropout” as shown in Figure 6. This time delay helps avoid nuisance undervoltage indications as may occur during system transients. The inverse time characteristic allows a 1.5 second delay before the relay de-energizes when any phase falls just below the dropout setting.

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