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S&C PMH Manual

S&C PMH Manual

Outdoor distribution 14.4 kv and 25 kv, pad-mounted gear
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Manual PMH Pad-Mounted Gear
Outdoor Distribution (14.4 kV and 25 kV)

Table of Contents

Section
Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Read this Instruction Sheet . . . . . . . . . . . . . . . . . . . 2
Retain this Instruction Sheet . . . . . . . . . . . . . . . . . . . 2
Proper Application . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Understanding Safety-Alert Messages . . . . . . . . . . . 3
Following Safety Instructions . . . . . . . . . . . . . . . . . . 3
Replacement Instructions and Labels . . . . . . . . . . . 3
. . . . . . . . . . . . . . . . . . . . . . . . . 4
March 9, 2020
© S&C Electric Company 1983-2020, all rights reserved
Installation
Page
Section
Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation
Access to the Interior . . . . . . . . . . . . . . . . . . . . . . . . 7
Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Cable Terminations . . . . . . . . . . . . . . . . . . . . . . . . . .10
Fault Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Completing the Installation . . . . . . . . . . . . . . . . . . . .13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . .15
Instruction Sheet 662-505
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  • Page 1: Table Of Contents

    Manual PMH Pad-Mounted Gear Outdoor Distribution (14.4 kV and 25 kV) Installation Table of Contents Section Page Section Page Introduction Shipping and Handling Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Packing .

  • Page 2: Introduction

    Safety Precautions on pages 3 and 4 . The latest version of this publication is available online in PDF format at sandc.com/en/support/product-literature/ . Retain this This instruction sheet is a permanent part of your Manual PMH Pad-Mounted Gear. Designate a location where you can easily retrieve and refer to this publication. Instruction Sheet...

  • Page 3: Safety Information

    Safety Information Understanding Several types of safety-alert messages may appear throughout this instruction sheet and on labels and tags attached to Manual PMH Pad-Mounted Gear. Familiarize yourself Safety-Alert with these types of messages and the importance of these various signal words:...

  • Page 4: Safety Precautions

    Safety Precautions DANGER Manual PMH Pad-Mounted Gear operates at high voltage. Failure to observe the precautions below will result in serious personal injury or death. Some of these precautions may differ from company operating procedures and rules . Where a discrepancy exists, follow your company’s operating procedures and rules .

  • Page 5: Shipping And Handling

    Shipping and Handling Packing Manual PMH Pad-Mounted Gear is fastened to a wood skid for shipment. Any components specified, such as fuses, refill units, fuse holders, end fittings, etc., are packed separately and, insofar as practicable, are shipped within the enclosure.

  • Page 6: Overview

    Overview The following instructions cover installation of Manual PMH Pad-Mounted Gear, which features directly operable accessible components and is available in ratings of 14.4 kV and 25 kV. These units are equipped with external handle-operated 600-ampere Mini-Rupter® Switches for three-pole live switching of three-phase source circuits, and 200- or 400-ampere hookstick-operated S&C Power...

  • Page 7: Access To The Interior

    . Follow these steps to open the enclosure: Access to the interior of Manual PMH STEP 1. Pad-Mounted Gear is controlled by the Penta-Latch® Mechanism, which must be opened with a pentahead socket wrench or Figure 2.
  • Page 8 Installation STEP 2. Close the left-hand door, where applicable, and Door-latching secure it with the latch by rotating the latch mechanism downward over the stop on the outer edge of the disengaged door. See Figure 4. (a) The right-hand door of double-door models of pad-mounted gear is equipped with the Penta-Latch Mechanism, which latches automatically when the door is closed.

  • Page 9: Placement

    Installation Placement (d) If switch interphase and end barriers (where applicable) are removed to facilitate this STEP 3. At the installation site, remove all separately procedure, note their positioning to ensure packaged components shipped in the pad- correct reinstallation later. mounted gear enclosure and set them aside in a protected area.

  • Page 10: Cable Terminations

    Installation Cable Terminations STEP 4. To facilitate makeup and connection of cable terminations to the switch terminals, switch interphase and end barriers (where applicable) can be removed by loosening the wing-head screw that secures each barrier to the barrier- support angle. (a) Remove the tie wraps that secure the wing- head screws for shipment.
  • Page 11 Installation Minimum clearance from energized parts to barriers: 1 inch (25 mm) for 14.4 kV; 2¼ inches (57 mm) for 25 kV Minimum clearance Minimum clearance from energized parts from terminator skirts to barriers: to electrical ground: 6 inches (152 mm) for ½...
  • Page 12 Installation STEP 6. Make up cable terminations following the cable- terminator manufacturer’s instructions. WARNING While the interior of Manual PMH Pad-Mounted Gear is protected from direct exposure to the elements, it is inherently an outdoor environment—and requires selection application cable-terminating devices accordingly .

  • Page 13: Fault Indicators

    Installation Fault Indicators Before connecting the cable terminators to the aluminum terminal pads, thoroughly wire- STEP 8. Optional mounting provisions fault brush aluminum contact surfaces to remove indicators (catalog number suffi x “-F1” or “-F2”) any dirt or foreign materials as well as natural are available.
  • Page 14 Installation STEP 11. Check functional operation of key interlocks, if (c) Remove the tie wraps that secure the dual- furnished. purpose barriers to the inside of the door. (d) Wipe barriers, insulators, switches, fuses, CAUTION and terminators clean with a mineral-spirits solvent and dry with a clean cloth.

  • Page 15: Dielectric Testing

    Dielectric Testing For the convenience of users who normally perform elec t r ic a l t e st s on s y st em component s such a s pad-mounted gear, appropriate withstand test values are given in Table 1. Table 1.

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