S&C PMH-13 - User Manual

Manual PMH Pad- Mounted Gear
Outdoor Distribution (14.4 kV and 25 kV)
December 9, 2019
© S&C Electric Company 1978-2019, all rights reserved
Instruction Sheet 662-510
Operation
Table of Contents
Section Page Section Page
Introduction
Qualified Persons ........................... 2
Read this Instruction Sheet ................... 2
Retain this Instruction Sheet. . . . . . . . . . . . . . . . . . . 2
Proper Application .......................... 2
Warranty .................................. 2
Warranty Qualifications ...................... 3
Safety Information
Understanding Safety-Alert Messages ........... 4
Following Safety Instructions .................. 4
Replacement Instructions and Labels ........... 4
Location of Safety Labels ..................... 5
Safety Precautions ......................... 7
Overview ................................... 8
Enclosure Doors
Opening and Closing the Doors ................10
Switching with Mini-Rupter® Switches
Operating the Mini-Rupter Switch ..............12
Front Barriers ..............................13
Fusing
Assembling the Fuse ........................15
Installing the Fuse in the Mounting ..............15
Switching with Uni-Rupter® Interrupters
Installing and Closing the Fuse ................16
A Note on Single-Pole Switching ...............19
Opening and Removing the Fuse .............. 20
Re-Fusing
How to Detect and Replace a Blown Fuse ....... 23
Installing the Fuse in the Mounting ............. 23
Maintenance
Components .............................. 24
Returning Equipment to Service ............... 24
Enclosure Finish ........................... 25
Appendix A
Dielectric Testing .......................... 26
Appendix B
Ratings for S&C Mini-Rupter Switches .......... 27
Ratings for S&C Power Fuses with
Uni-Rupter Interrupters ................... 27
Appendix C
Optional Features .......................... 28
Appendix D
Current-Limiting Fuses for Use in
S&C PMH Pad-Mounted Gear .............. 31
Recommended Voltage Ratings ............... 32

S&C PMH-13 Specifications

General

Rated Continuous Current	600 A
Rated Short Circuit Current	12.5 kA
BIL Rating	95 kV
Operating Mechanism	Manual or Motor
Weight	Varies by configuration
Current	600 A

Summary

Introduction

Qualified Persons

Defines who is qualified to install, operate, and maintain equipment.

Safety Information

Understanding Safety-Alert Messages

Explains signal words (DANGER, WARNING, CAUTION, NOTICE) and their meanings.

Location of Safety Labels

Safety Precautions

Critical Safety Procedures: De-energizing, Testing, and Grounding

Outlines essential steps before working on high-voltage equipment.

Handling Energized Terminals and Backfeed

Emphasizes assuming terminals are energized and notes backfeed.

Overview of Pad-Mounted Gear

Uni-Rupter Interrupter Component

Enclosure Doors Operation

Opening and Closing Procedures

Switching with Mini-Rupter Switches

Operating the Mini-Rupter Switch

Fusing Procedures

Assembling the Fuse

Switching with Uni-Rupter Interrupters

Installing and Closing the Fuse

Step-by-step guide for installing and closing fuses using a Grappler tool.

Opening and Removing the Fuse

Step-by-step guide for opening and removing fuses using a Grappler tool.

Re-Fusing Operations

Detecting and Replacing a Blown Fuse

Explains how to identify blown fuses for different types.