Westinghouse DBN-1016 User manual

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NAVSHIPS 362-2189
SWITCHBOARD
Technical Manual
PART Z CHAPTER 3B
NAVY TYPE ACB-1600HR
CIRCUIT BREAKER
WESTINGHOUSE TYPE DBN-1016
BEMOVABLE ASSEMBLY
1600-AMPEBE FBAME SIZE
STANDABDIZED DIMENSIONS
WESTINGHOUSE ELECTRIC CORPORATION
EAST PITTSBURGH, PA., U. S. A.
TECHNICAL MANUAL 32-855-3Cl
BUREAU OF SHIPS • NAVY DEPARTMENT • FEBRUARY, 1960

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PREliMINARY DATA
PRELIMINARY DATA
PURPOSE
A circuit breaker has two fundamental pur-
poses: First, to perform normal switching op-
erations to isolate a circuit, and second, to
isolate a circuit under fault conditions.
CAUTION -WARNING -THE CIRCUIT BREAKER
SHOULD BE IN THE OPEN POSITION AND THE
SWITCHBOARD DE-ENERGIZED BEFORE IN-
STALLING, ADJUSTING, INSPECTING. REPLAC-
ING PARTS, OR REMOVING THE CIRCUIT
BREAKER. IF THE BUS CANNOT BE DE-EN-
ERGIZED, USE INSULATED HANDLE TOOLS,
RUBBER GLOVES, AND A RUBBER FLOOR
MAT.
INSTALLATION
Tbe movable component must be removed
before stationary component can be bolted in
switchboard. Normal care in handling the sta-
tionary component is suffiCient.
After
securing the stationary component the
movable component
should be lifted by hooks in
the "lifting holes".
When installing the circuit breaker, care
should be taken to see tbat the supporting sur-
face is even and vertical, and that all leads to
be connected to the circuit breaker are de-en-
ergized. Protect the circuit breaker from dirt
and possible damage.
The connections to the circuit breaker studs
should be cleaned, flat and free of burrs to as-
sure full contact area, and firmly clamped or
bolted in place to prevent excessive heating.
The connecting
cables should bave adequate cur-
rent carrying capacity. Connecting cables should
be
supported so tbat the Circuit breaker studs
Will not be subjected to unnecessary strain.
At no time should the circuit breaker be
allowed to
rest upon or be supported by the
current studs. This Will result in unnecessary
damage and stress to the studs and the insu-
lated moldings.
Any
discoloration or pitting of the circuit
breaker contacts in evidence when the circuit
breaker is received from the manufacturer is
caused by calibrating the breaker and will in
no way interfere with proper functioning of the
circuit breaker.
MAINTENANCE
Periodic inspection of the breaker is rec-
ommended. An inspection should always be
made
after it is known tbat the breaker bas
opened on a severe short cirCuit. When a cir-
cuit breaker is not operated for long periods
of time, a high resistance oxide or suifide may
form on the contact surfaces which results in
overheating. To burn off this high resistance
film, operate the circuit breaker several times
under normal load at regular inspection periods.
Be sure the breaker is disconnected from
all sources of power before inspecting or re-
pairing.
If excessive heating occurs, look for loose
or corroded contacts or connections.
When inspecting the
breaker, examine the
contacts to see if there bas been any severe
pittings or burning of the contact surfaces which
will
prevent proper contact Wipe. Rough or
high spots should be removed with a very fine,
clean file or fine, clean sandpaper.
LUBRICATION
In general, the breaker mechanism re-
quires very little lubrication which should be
applied
sparingly. Any excessive amount of oil
on the breaker parts is apt to collect dust and
dirt and is to be avoided.
The
lubrication applied during manufacture
should
be sufficient for the life of the breaker.
REPLACNG PARTS
Before replacing any part, the operator
shouid note the position of each part before
remOVing.
When remOving or replacing tension springs
with hooks, the
work may be facilitated by pull-
ing On the hooks with a cord or a wire.
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CIRCUIT BREAKER
IV
TABLE OF CONTENTS
Description
CHAPTER 1 - GENERAL INFORMATION.
SECTION 0 - GENERAL DATA .....
CmCUIT BREAKER CHARACTEIDSTICS •
Rating of Components. .
Auxiliary Switch. • . . •
SECTION 1 - INTRODUCTION.
GENERAL .•.•......
SECTION 2 - DETAILED DESCIDPTlON .
CIRCUIT
BREAKER ..•
General ...•....
Movable Component .
Pole Unit .•...•
Arc Chute ..••..
Operating Mechanism .
Closing Relay . . . . .
Closing Solenoid. . . •
Shunt
Trip Device. . .
Anti-SOOck-Close Device .
Anti-SOOck-Open Device •.
Series Overcurrent Trip Unit
Auxiliary Switch. . . •
Main Disconnects . . .
Secondary Disconnects
Indicator Lights .
Silicon Rectifier.
Cell Interlock ..•..
Extension Rails . . . .
CHAPTER 2 - PmNCIPLES OF OPERATION.
SECTION 1 - GENERAL PmNCIPLES •
GENERAL ...
Description .. . . .
Closing ......•.
Tripping ...... .
Electrical Operation
CHAPTER 3 - OPERATING INSTRUCTIONS.
SECTION 1 - PRECAUTIONS .
SAFETY PRECAUTIONS ..
, .
Page
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TABLE OF CONTENTS
TABLE OF CONTENTS (Cont'd)
Description
CHAPTER 4-INSTALLATION.
SECTION 1 - INSTALLATION INSTRUCTIONS
GENERAL .•...•..•
CHAPTER 5 - MAINTENANCE .
SECTION 1 - PREVENTIVE MAINTENANCE
PERIODIC PROCEDURES ........ .
General .....•..........•
SECTION 2 - CORRECTIVE MAINTENANCE
GENERAL INSTRUCTIONS.
General ..
Chassis ....... .
Pole Units ...... .
Arc Chute ...... .
Operating Mechanism .
Closing Relay . . . . . . .
Closing Solenoid. . . . . .
Shunt Trip Device. . . . .
Anti-Shock-Clcrse Device •
Anti-Shock-Open Device •
Overcurrent Trip Device.
Auxiliary Switch. •
Main Disconnects .
Secondary Contacts
Indicator Lights . .
Silicon Rectifier ..
Drawout Interlock ..
Extension Rails . . .
CHAPTER 6 - REPAIR PARTS LIST .
SECTION 1 - REPAIR PARTS LIST INTRODUCTION.
PARTS IDENTIFICATION.
Circuit Breaker • . . . . . . . . . . . .
Repair Part Ordering. • • . . . . • . .
SECTION 2 - REPAIR PARTS TABULATION
REPAIR PARTS TABULATION .
Repair Parts . .
CHAPTER 7 - DRAWINGS .
SECTION 1 - GENERAL.
Page
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CIRCUIT BREAKER
VI
Figure
LIST OF ILLUSTRATIONS
CHAPTER 1 - GENERAL lNFORMATION
SECTION 1 - lNTRODUCTION
1-1-1 Removable ABsembly and Stationary Component. .
1-1- 2 Movable Component. . • . . . . . . . . . . . . . . .
1-2-1
1-2-2
1-2-3
1-2-4
1-2-5
1-2-6
1-2-7
1-2-8
1-2-9
1-2-10
1-2-11
1-2-12
1-2-13
1-2-14
SECTION 2 - DETAILED DESCRIPTION
Circuit Breaker Movable Component ...•.
Arc Chute and Pole Unit Assembly ....•.
Operating Mechanism with Position Indicator
Closing Relay. . . . . . . . . . . . . . . . •
Closing Solenoid and Relay Trip Assembly
Shunt Trip Device . . • • . . . .
Anti-Shock-Close Device ..... .
Anti-Shock-Open Device ... .
Typical Time Current Curves. .
Overcurrent Trip Device .•..
Auxiliary Switch . . . . • . . . •
Main and Secondary Disconnects
Indicator Light . . . . . . • • . . .
Silicon Rectifier ......•...
CHAPTER 2 - PRlNCIPLES OF OPERATION
SECTION 1 - GENERAL PRlNCIPLES
2-1-1 Wiring Diagram ................•
2-1-2 Schematic Symbols •.........•••••
CHAPTER 5 - MAlNTENANCE
SECTION 2 - CORRECTIVE MAlNTENANCE
5-2-1 Relay Contact Adjustment . . . • • • . . . .
CHAPTER 7 - DRAWlNGS
SECTION 1 - GENERAL
7 -1-1 Air Circuit Breaker Removable Assembly.
7-1-2 Air Circuit Breaker Stationary Components.
Page
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1-4
1-5
1-6
1-8
1-10
1-11
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1-15
1-16
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. . .. 5-4
. 7-3,7-4
. 7-5,7-6
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Table
LIST OF TABLES
CHAPTER 1 - GENERAL INFORMATION
SECTION 0 -GENERAL DATA
1-0-1 Circuit Breaker Classification Data
1-0-2 Current Rating of Components
1-0-3 Voltage Rating of Components
1-0 -4 Auxiliary Switch . . . . .
LIST OF TABLES
Page
1-1
1-1
1-2
1-2
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CHAPTER l-GENERAL INFORMATION
CHAPTER 1
GENERAL
INFORMATION
Section O-General Data
1-0-1 CIRCUIT BREAKER CHARACTERISTICS 1-0-1-1 Rating of Components
The circuit breaker classification data is The rating of the components are listed in
listed in Table 1-0-1. Tables 1-0-2 and 1-0-3.
TABLE 1-0-1-CIRCUIT BREAKER CLASSIFICATION DATA
Type ...
Frame Size (continuous rating).
Voltage ..
Current ..... .
Frequency .... .
Poles ....... . . .
Continuous Current Rating
Interrupting Capacity
Short Time Rating .
Short Time Duration
Means of Closing
Auxiliary Switch.
(Trip Coil)
Mounting .....
Connections . . .
Insulation Class .
Shock Classification.
Ambient Temperature.
Protective Functions
Master Drawing .•.........
Navy Test Approval. . . . . . . ..
Weights -
Complete Removable Assembly.
Movable Component Only .
Stationary Component Only
Overcurrent Device ....
· .. Navy Type ACB 1600HR
(W.E. Corp. Type DBN1016)
1600
Amperes
. 500 Volts
· ............. A-C
· . . . • • . .
... 60 Cycles
• • . . • • . • . . . • • •• 3
.800,1000,1200,1400,1600 Amperes
· ..... 100,000 (RMS) Amperes
· ..... 100,000 (RMS) Amperes
· ..•.......... 30 Cycles
Electrical and Emergency Manual
.................. 8
· Removable Assembly -Dead
Front
.. Back
.. ... B
· . . . . . . . Class III
· . . . . . . .
.. 50
0C
·
Overcurrent, Long Delay Tripping,
Short Delay Tripping (Bands 1,2&3),
Instantaneous Tripping, Shunt Trip
Westinghouse il900J232 (2 sheets)
5419-31 of 20 March 1959
· 560 Ibs.
· 440 Ibs.
· 120 Ibs.
· 10 Ibs.
TABLE 1-0-2-CURRENT RATING OF COMPONENTS
Duty
Load Duration
Allowable Operations
Components
(Amperes)
(Seconds)
Per Minute
115V.
Closing Relay
4 Intermittent
1/5
10
450V.
Closing Relay 1 Intermittent
1/5 10
115V. Closing Magnet
80 Intermittent
1/10 10
450V. Closing Magnet
20 Intermittent
1/10
10
115V. Shunt Trip
4 Intermittent
1/10 10
450V. Shunt
Trip
1 Intermittent
1/10 10
Auxiliary Switch
15 Intermittent
(For interrupting rating see table)
Secondary DIsconnects
15 Intermittent
(No interrupting rating)
Wiring to Aux. Switch
10 Intermittent
(Unless contract specifies more)
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CIRCUIT BREAKER
TABLE 1-0-3-VOLTAGE RATING
OF COMPONENTS
Nominal Voltage
Rating Range
Components (Volts)
Volts
Closing Re lay 115 90-130
and Magnet 450 360-500
Shunt
Trip
115
80-130
450 360-500
1-0-1-2 Auxiliary Switch
The interrupting capacities of the auxiliary
switch contacts are listed in Table 1-0-4.
TABLE 1-0-4-AUXILIARY SWITCH
Non-Inductive Inductive
Volts Circuit
Circuit
115 a-c 75 amps. 15.0 amps.
450 a-c 25
amps.
5.0 amps.
Section l-Introduction
1.1·1 GENERAL
This technical manual describes a Navy
Type ACB 1600HR (Westinghouse
Type DBN-
1016) 1600-ampere frame size air circuit
breaker, meeting the requirements of Specifica-
tion MlL-C-17587 for Naval Shipboard service.
Each circuit breaker is supplied as a complete,
removable switchboard assembly consisting of
circuit breaker, separable
disconnects and as-
sociated control wiring, drawout mechanism and
assemhly structual supports and back plate in·
cluding stationary main bus connections and sta-
tionary terminals for connection of the necessary
external control wiring.
The complete, removable assembly consists
of two major components; the stationary com-
ponent that is bolted into the switchboard frame,
and the movable component which is the oper-
ating mechanism of the circuit breaker and may
be drawn out for inspection, maintenance or
isolation from the shipboard electrical system.
The general arrangement of this equipment
is shown in figures 1-1-1 and 1-1-2.
The DBN-1016 air circuit breaker is a
complete, removable assembly for installation
within a switchboard cubicle.
The circuit breaker is designed as an as-
sembly including the drawout mechanism. These
assemblies incorporate disconnect features for
both main current connections and secondary
current connections.
This mounting allows easy
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removal and installation of the movable compo-
nent when maintenance operations are required.
The circuit breaker is closed electrically
from a local or remote control switch. It may
be tripped from the control switch or may be
tripped by depressing the "Push-To-Trip" button
which
protrudes through the face plate.
For maintenance, the emergency closing
handle provides manual closing by inserting the
operating handle, through the face plate, into
the
socket provided in the operating mechanism
and pulling the operating handle down (approxi-
mately 45 degrees) until the breaker latches.
The moving component consists of a rigid
steel chassis to which are bolted various sub-
assemblies. Each sub-assembly is a complete
unit and is readily interchangeable between
breakers. In addition, each sub-assembly may
be removed intact and easily replaced for mini-
mum outage time.
·The sub-assemblies requiredin all breakers
are the mechanism, pole units, arc chutes, aux-
iliary switch, secondary disconnects, anti-shock-
closed-device, anti-shock-open-device, closing
relay, and closing magnet. The remaining sub-
assemblies that may be included are overcurrent
trip devices and shunt trip device.
The air circuit breaker for three phase a-c
service is normally provided with overcurrent
trip devices in the two outer poles, otherwise
the three poles are identical.
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AUXILIARY
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CHAPTER I-GENERAL INFORMATION
RECTIFIER
MAIN
STATIONARY
I
' .... T" .... " BOLTS
INDICATOR
LIGHT
EXTENSION
RAILS
,
,
> < ~
STATIONARY
COMPONENT
OPERATING
HANDLE
FIC U RE }./.1- Removable A..,embly and Stationary Component
CROSSBAR
,
1·3

CIRCUIT BREAKER
1·4
ARC CHUTE
FACE
PLATE
MAIN
SECONDARY
DISC ON N ECTS
ANTI-SHOCK-OUT
OPERATING MECHANISM
EXTENSION RAIL
RELEASE
HOLE
CAM ROLLER
ROLL OUT WHEELS
F,GURE: 1-1-2 - Movable Component