Westinghouse Porcel-line DHP Series 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
I
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Effective
January
,
1989
Supersedes
I
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32
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A
dated
September
,
1978
Courtesy of NationalSwitchgear.com

Westinghouse Porcel-line DHP Series Specifications

General

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

Summary

PURPOSE

SAFETY

INTRODUCTION

GENERAL DESCRIPTION

Arc Chutes

Barrier Assembly

Accessories

SAFETY FEATURES

SAFE PRACTICES

RECEIVING, HANDLING AND STORING

STORING

DESCRIPTION AND OPERATION

MANUAL SPRING CHARGING

Manual procedure for charging the closing spring using a ratcheting lever.

MANUAL CLOSING

Manual operation to close the breaker by lifting the spring release plunger.

MANUAL TRIPPING

Manual operation to trip the breaker by lifting the tripping trigger plunger.

MAINTENANCE CLOSING

Procedure for closing the breaker using a maintenance handle.

ELECTRICAL CLOSING AND TRIPPING

STORED ENERGY MECHANISM

MECHANISM PANEL

POLE UNITS

CONTACTS

ARC CHUTES

INTERPHASE BARRIERS

LEVERING-IN DEVICE

PUFFER

SHUTTER ROLLER

GUIDE CHANNEL AND RAIL LATCH

SECONDARY CONTACTS

GROUND CONTACT

BREAKER POSITION INDICATOR AND MOC SWITCH OPERATING PIN

INTERLOCKS

CONTROL SCHEMES

UNDERVOLTAGE TRIP ATTACHMENT

INSTALLATION

Mount Arc Chutes on Breaker

General procedure for mounting arc chutes onto the breaker.

Connect Shunt Strap

Connecting the shunt strap from the lower contact to the front arc chute.

Mount Barrier

Procedure for mounting the barrier assembly onto the breaker.

Position Breaker

MINIMUM CONTACT SEPARATION

MECHANISM

LUBRICATION

INSULATION

HOLDING PAWL ADJUSTMENT

ANTI-CLOSE INTERLOCK ADJUSTMENT

LATCH CHECK SWITCH ADJUSTMENT

CONTACT ADJUSTMENT

CONTACT GAP ADJUSTMENTS

Procedure for inspecting and adjusting contact gaps for proper settings.

CONTACT PENETRATION ADJUSTMENT

CONTACT PENETRATION – MAJOR ADJUSTMENT

Procedure for adjusting contact penetration depth, usually after disassembly.

CONTACT PENETRATION – MINOR ADJUSTMENT

HINGE

FLOOR TRIPPER ADJUSTMENT

MAINTENANCE

INSPECTION SCHEDULES

Guidelines for scheduling routine breaker inspections based on time or operations.

INSPECTION/MAINTENANCE PROGRAMS

Establishing a program for routine breaker examination and maintenance.

INSPECTION/MAINTENANCE RECORDS

Importance and types of records for tracking breaker condition and maintenance.

INSPECTION INTERVAL BASED ON SHORT CIRCUIT SWITCHING

SERVICE CONDITIONS

ROUTINE INSPECTION

MECHANISM OPERATION

LOW LEVEL LOAD CURRENT SWITCHING DUTY

MODERATE TO HIGH LEVEL SWITCHING DUTY

CAPACITOR SWITCHING

TOTAL BREAKER LIFE

CHANGING DUTY CONSIDERATIONS

INSPECTION/MAINTENANCE PROGRAM REVIEWS

MAINTENANCE PROCEDURES

CONTACTS

ARC CHUTE

MINIMUM CONTACT SEPARATION

PARTS IDENTIFICATION

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