S&C PMH-11 - 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-11 Specifications

General

Brand	S&C
Model	PMH-11
Category	Industrial Electrical
Language	English

Summary

Introduction

Qualified Persons

Information on individuals authorized to install, operate, and maintain equipment.

Read this Instruction Sheet

Proper Application

Safety Information

Understanding Safety-Alert Messages

Explains the meaning and importance of DANGER, WARNING, CAUTION, and NOTICE messages.

Following Safety Instructions

Directs users to follow safe operating procedures and seek assistance when needed.

Location of Safety Labels

Safety Precautions

Overview

Enclosure Doors

Opening and Closing the Doors

Step-by-step instructions for safely opening and closing enclosure access doors.

Switching with Mini-Rupter Switches

Operating the Mini-Rupter Switch

Detailed procedure for operating the Mini-Rupter switch, including safety warnings.

Front Barriers

Instructions and safety precautions for using dual-purpose front barriers with switches.

Fusing

Assembling the Fuse

Switching with Uni-Rupter Interrupters

Installing and Closing the Fuse

Step-by-step guide for safely installing and closing fuses with Uni-Rupter interrupters.

Opening and Removing the Fuse

Procedures for safely opening and removing fuses from the Uni-Rupter interrupter.

Re-Fusing

How to Detect and Replace a Blown Fuse

Identifies blown fuses and provides steps for their replacement.

Installing the Fuse in the Mounting

Maintenance

Returning Equipment to Service