Westinghouse Porcel-line 50 DHP 250 User Manual

l
.
B
.
32
-
253
-
4
B
Instructions
for
Porcel
-
line
®
Type
DHP
Magnetic
Air
Circuit
Breakers
Westinghouse
Electric
Corporation
Distribution
and
Control
Business
Unit
Commercial
Operations
Division
-
ILS
Department
Pittsburgh
,
PA
15220
I
.
B
.
32
-
253
-
4
B
Effective
January
,
1989
Supersedes
I
.
B
.
32
-
253
-
4
A
dated
September
,
1978
Courtesy of NationalSwitchgear.com

Westinghouse Porcel-line 50 DHP 250 Specifications

General

Brand	Westinghouse
Model	Porcel-line 50 DHP 250
Category	Circuit breakers
Language	English

Summary

PURPOSE

SAFETY

Safety guidelines for operating circuit breakers.

INTRODUCTION

GENERAL DESCRIPTION

Accessories

Lists essential accessories for circuit breaker installation and maintenance.

SAFETY FEATURES

SAFE PRACTICES

Guidelines for safe handling, operation, and maintenance of high voltage breakers.

RECEIVING, HANDLING AND STORING

RECEIVING AND HANDLING

Inspect equipment for shipping damage and guidelines for safely moving breakers.

STORING PROCEDURES

DESCRIPTION AND OPERATION

MANUAL OPERATION MODES

Covers manual charging, closing, and tripping procedures.

ELECTRICAL AND MAINTENANCE OPERATION

STORED ENERGY MECHANISM

BREAKER COMPONENTS

ARC CHUTES

Function and construction of arc chutes used for arc interruption.

INTERPHASE BARRIERS AND LEVERING-IN DEVICE

PUFFER AND GUIDE CHANNEL SYSTEMS

CONTACTS AND INDICATORS

INTERLOCKS

CODING AND LEVERING-IN INTERLOCKS

Interlocks for correct breaker rating and preventing movement when closed.

ADDITIONAL INTERLOCKS AND CONTROL SCHEMES

ACCESSORIES

Lists essential maintenance accessories like dollies and handles.

INITIAL INSPECTION AND OPERATION

INSTALLATION PROCEDURES

BREAKER POSITIONING AND COMPONENT ASSEMBLY

Installing arc chutes, barriers, and positioning the breaker.

CELL INSERTION AND CONTACT ENGAGEMENT

TEST POSITION OPERATION AND CELL INSERTION

ADJUSTMENTS

MECHANISM AND INTERLOCK ADJUSTMENTS

Adjusting holding pawl and anti-close interlock for proper function.

CONTACT AND GAP ADJUSTMENTS

CONTACT PENETRATION ADJUSTMENTS

MINOR CONTACT ADJUSTMENTS AND FLOOR TRIPPER

MAINTENANCE GUIDELINES

INSPECTION AND PROGRAMMING

Establishing inspection schedules, programs, and record-keeping.

SHORT CIRCUIT SWITCHING INSPECTION

SERVICE CONDITIONS AND ROUTINE INSPECTION

MAINTENANCE PROCEDURES AND DUTY CONSIDERATIONS

ARC CHUTE MAINTENANCE

ARC CHUTE CLEANING AND MECHANICAL TIMING

CONTACT SEPARATION, MECHANISM, INSULATION, AND LUBRICATION

MOTOR AND SPRING REPLACEMENT

ARC CHUTE, SHUNT STRAP, AND BARRIER INSTALLATION

TILT ARC CHUTE PROCEDURES

ASSEMBLY AND INSTALLATION FOR VARIOUS BREAKER MODELS

BARRIER MOUNTING PROCEDURES

ASSEMBLY AND INSTALLATION FOR VARIOUS BREAKER MODELS

BARRIER AND ARC CHUTE PROCEDURES

ASSEMBLY AND INSTALLATION FOR VARIOUS BREAKER MODELS

TILT ARC CHUTE PROCEDURES

ASSEMBLY AND INSTALLATION FOR VARIOUS BREAKER MODELS

BARRIER AND ARC CHUTE PROCEDURES

ASSEMBLY AND INSTALLATION FOR VARIOUS BREAKER MODELS

BARRIER AND ARC CHUTE PROCEDURES

ASSEMBLY AND INSTALLATION FOR VARIOUS BREAKER MODELS

TILT ARC CHUTE PROCEDURES

ASSEMBLY AND INSTALLATION FOR VARIOUS BREAKER MODELS

TILT ARC CHUTE PROCEDURES

PARTS IDENTIFICATION

RENEWAL PARTS INFORMATION

Covers recommended stock and ordering procedures for renewal parts.

COMPONENT PARTS LISTS