Westinghouse Porcel-line 50 DHP 350 User Manual

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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
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Effective
January
,
1989
Supersedes
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dated
September
,
1978
Courtesy of NationalSwitchgear.com

Westinghouse Porcel-line 50 DHP 350 Specifications

General

Brand	Westinghouse
Model	Porcel-line 50 DHP 350
Category	Circuit breakers
Language	English

Summary

PURPOSE AND SAFETY

SAFETY FEATURES

Key safety features for breaker operation and protection.

SAFE PRACTICES

Essential safety guidelines for handling and working on breakers.

INTRODUCTION AND GENERAL DESCRIPTION

Arc Chutes

Description of arc chute components and function in arc interruption.

Barrier Assembly and Accessories

Details on barrier assembly, accessories, and their functions.

DESCRIPTION AND OPERATION

MANUAL SPRING CHARGING AND CLOSING

Procedures for manually charging the closing spring and closing the breaker.

MANUAL TRIPPING AND STORED ENERGY MECHANISM

Steps for manually tripping the breaker and details on stored energy mechanisms.

COMPONENTS AND MECHANISMS

MECHANISM PANEL AND POLE UNITS

Overview of the mechanism panel and the construction of pole units.

CONTACTS AND INTERLOCKS

Details on contact types, adjustments, and operational interlocks.

LEVERING-IN DEVICE AND CONTROL SCHEMES

Explanation of the levering-in device, interlocks, and control circuit diagrams.

MAINTENANCE

INSPECTION SCHEDULES AND ROUTINE INSPECTION

Guidelines for inspection intervals, programs, and routine checks.

MECHANICAL OPERATION AND DUTY CONSIDERATIONS

Procedures for checking mechanical operation and considering duty cycles.

CONTACT AND ADJUSTMENT PROCEDURES

Detailed procedures for adjusting contacts, floor trippers, and other mechanisms.

SPECIFIC ADJUSTMENTS

Instructions for adjustments like holding pawl and anti-close interlock.

INITIAL INSPECTION AND OPERATION

MANUAL OPERATIONAL CHECKS

Step-by-step manual checks before electrical operation.

INSTALLATION

BREAKER POSITIONING AND COMPONENT MOUNTING

Procedures for positioning the breaker and mounting arc chutes and barriers.

RENEWAL PARTS

PARTS IDENTIFICATION AND ORDERS

Information on identifying and ordering replacement parts for the breaker.