Eaton COOPER POWER Series Installation, Operation And Maintenance Instructions
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Eaton COOPER POWER Series Installation, Operation And Maintenance Instructions

Eaton COOPER POWER Series Installation, Operation And Maintenance Instructions

Underground distribution switchgear automatic source transfer switchgear with ist control
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Underground
Distribution Switchgear
MN285002EN
Type PST Model-9 Automatic Source Transfer Switchgear with iST
Control; Installation, Operation, and Maintenance Instructions
Effective April 2019
Supersedes April 2018
COOPER POWER
SERIES

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Summary of Contents for Eaton COOPER POWER Series

  • Page 1 COOPER POWER Underground Distribution Switchgear SERIES Effective April 2019 MN285002EN Supersedes April 2018 Type PST Model-9 Automatic Source Transfer Switchgear with iST Control; Installation, Operation, and Maintenance Instructions...

  • Page 2: Disclaimer Of Warranties And Limitation Of Liability

    CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY ANY CONTRACT BETWEEN THE PARTIES. In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or other-wise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not limited to...

  • Page 3: Table Of Contents

    Contents DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .II SAFETY INFORMATION .
  • Page 4 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Maintenance inspection procedure .

  • Page 5: Safety Information

    FOR LIFE FOR LIFE Eaton meets or exceeds all applicable industry standards relating to product safety in its Cooper Power™ series products. We actively promote safe practices in the use and maintenance of our products through our service literature, instructional training programs, and the continuous efforts of all Eaton employees involved in product design, manufacture, marketing, and service.
  • Page 6 Type PST Model-9 Automatic Source Transfer Switchgear with iST Control This page is intentionally left blank. INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN285002EN April 2019...

  • Page 7: Product Information

    Upon receipt, inspect the unit thoroughly for damage and loss of parts or fluid incurred during shipment. Eaton's Cooper Power series VFI Interrupters and iST control If damage or loss is discovered, file a claim with the provide independent overcurrent protection of the two carrier immediately.

  • Page 8: Vacuum Interrupters

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Bushings Bushings are mounted horizontally in-line and located a Fault Block Signal minimum of 24 inches above the pad. Overcurrent Depending on the rating of the PST Model-9 unit, bushings Protection may be furnished in different configurations and ratings.
  • Page 9 Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Interrupting Switch Nameplate CI Switch S1 Operation CI Switch S2 Manual Counter Operating Lever Manual Spring Charge Operator Interrupting Switch Spring Charge Indicator CI Switch S1 Status Indicator iST 901 Control Enclosure CI Switch S1 Manual Operating Lever...

  • Page 10: Interrupter Duty Cycle

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Interrupter duty cycle The VFI mechanism conforms to the duty cycle requirements of IEEE Std C37 .60™-2003 standard. Switch test sequence The VFI operating mechanism conforms to the switch test sequence requirements of IEEE Std C37 .60™-2003.

  • Page 11: Ratings And Specifications

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Ratings and specifications Table 1 . Electrical ratings PST Model-9 transfer switchgear Description 15 kV 25 kV 35 kV Maximum Design Voltage, kV 15.5 BIL, kV 1-Minute Withstand Voltage (60 Hz) Interrupter and Terminators, kV Continuous Current (max), A Interrupting Current (sym./asym.), kA 12/20...
  • Page 12 Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Fault Block Signal Overcurrent Protection Voltage Input iST-921 Control Control Overcurrent Protection Sequence 1: Model-9 unit connected to preferred source during normal operating conditions Fault Block Signal Figure 8 . Source health menu Overcurrent Protection Voltage Input...
  • Page 13 Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Preferred mode operation The following is a typical Preferred Mode automatic load- transfer sequence (Figure 8): The load is transferred to the alternate source, after completing a preset time delay, when one or more of the health parameters of the preferred source falls outside of the programmed settings and the alternate source is of good health.
  • Page 14 Type PST Model-9 Automatic Source Transfer Switchgear with iST Control CONNECTOR-8 COND. CONNECTOR - 14 COND. IST-901 CONTROL IST-921 CONTROL VFI2 CONNECTOR-19 COND. IST-921 CONTROL RC2 Figure 12 . PST Model-9 automatic source transfer switchgear schematic INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN285002EN April 2019...

  • Page 15: Operation Of Interval Timer

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control iST relay Six PT fuses GFCI Convenience outlet Heater Optional auxiliary switch terminal strip for user monitoring of switch status, independent of Battery backup relay optional. (Not shown.) Figure 13 . iST control Manual operation Operation of interval timer Each switch can be independently opened and closed...

  • Page 16: Ci Switch

    Source ll to Source I by the right alternate-to-preferred timer. CI switch Eaton's Cooper Power series Type CI three-phase motor- operated source transfer switches (Figure 14) employ long- life vacuum interrupters. The vacuum interrupter contacts are opened and closed by a mechanism that releases stored spring energy.

  • Page 17: Manual Operation Of Ci Switches

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Manual closing of CI switch As the contacts are closed, the closing spring energy is discharged while the opening spring remains charged and NOTICE latched. Upon receipt of an opening signal, the FST releases the opening-spring latch, and the contacts of all three Parallel connection of sources is possible when vacuum interrupters are simultaneously driven to their open...

  • Page 18: Vacuum Fault Interrupters (Vfi)

    . G123 .1 Vacuum fault interrupters (VFI) Eaton's Cooper Power series vacuum fault interrupters WARNING (VFI) provide fault current interruption and load make/break Do not operate this equipment if energized parts are not switching capabilities.

  • Page 19: Opening Vfi Switches

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Opening VFI switches Test fluid dielectric strength and moisture content. If the switchgear has been stored for some time or is The Vacuum Fault Interrupter (VFI) is opened by pulling the being relocated, perform a dielectric test and moisture operation handle down to the open position.

  • Page 20: Initial Mechanical Operation Check

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control spreader bar of adequate capacity must be used to WARNING prevent damaging the switchgear housing. The use of chains is not recommended as it may damage Hazardous voltage . Never rely on the open position of the cover and associated gasket seal.

  • Page 21: Initial Electrical Operation Check

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control possible contact with high voltage at the source Switch S1 should close with audible "thunk" and bushings, which may cause death or severe personal position indicator should switch to a red "closed" flag. injury .

  • Page 22: Initial Ist Control Operation Check

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control iST Control Enclosure Panel SAFETY INSTRUCTIO NS SAFETY SAFETY INSTRUCTIO NS INSTRUCTIO NS 120 VAC Figure 25 . Connection of AC power to TB8 for initial electrical operation testing of the PST Model-9 unit Initial iST control operation check Figure 23 .

  • Page 23: Maintenance

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Maintenance Hit MENU, and then select USE by hitting the F1 key. The controller will reboot after selecting to use. WARNING Set RESTORATION MODE to the preferred restoration mode. This equipment relies on dielectric fluid to provide electrical insulation between components .

  • Page 24: Internal Inspection And Repair

    (5 to 6 ft-lbs). position gasket so it will seal properly. Do NOT tighten visible break window hardware. Interrupter repairs. Contact your local Eaton's Cooper First check for cracks in the window. If found order Power Systems sales representative for additional replacement window kit.

  • Page 25: Types Of Fluid Samples

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control Each scheduled pad-mounted switchgear maintenance WARNING activity should include a physical inspection of the unit, a fluid level check, and fluid testing as described in the Fluid This equipment is not intended to protect human testing section of this manual.

  • Page 26: Fluid Fill Guidelines

    Type PST Model-9 Automatic Source Transfer Switchgear with iST Control 12. Label the sample container with the switchgear serial WARNING number, sample date, and temperature at the time of extraction. The switchgear tank must have neutral or positive internal pressure prior to extracting a fluid sample . 13.

  • Page 27: Fluid Testing

    Service recommendation < 25 Continue with Eaton recommended maintenance schedule (inspection and sampling every 2 years). Obtain another oil sample for moisture analysis in 6 months to determine if moisture levels are rising. Refer to the Fluid sampling guidelines section in this manual. If moisture levels increase, determine leak point 25 –...

  • Page 28: Testing

    Contact your Eaton representative for additional information and ordering procedures. The following WARNING documents are also available for common field repairs and procedures: Hazardous voltage .
  • Page 29 Type PST Model-9 Automatic Source Transfer Switchgear with iST Control This page is intentionally left blank. INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN285002EN April 2019...
  • Page 30 Type PST Model-9 Automatic Source Transfer Switchgear with iST Control This page is intentionally left blank. INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN285002EN April 2019...
  • Page 31 Type PST Model-9 Automatic Source Transfer Switchgear with iST Control This page is intentionally left blank. INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN285002EN April 2019...
  • Page 32 United States Eaton.com/cooperpowerseries © 2018 Eaton All Rights Reserved Printed in USA Eaton is a registered trademark. For Eaton‘s Cooper Power series product Publication No. MN285002EN April 2018 All trademarks are property information, call 1-877-277-4636 or visit: KA20480735 Rev: 02 of their respective owners.

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