Powell PowlVac ASD User manual

IB-65100 PowlVac® ASD
27kV & 38kV Vacuum Circuit Breaker
27kV & 38kV Circuit Breaker with
Automatic Secondary Disconnect
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PowlVac® ASD 27kV & 38kV Vacuum Circuit Breaker
IB-65100
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IB-65100
Contact Information
Powell Electrical Systems, Inc.
www.powellind.com
[e-mail]
Service Division
PO Box 12818
Houston, Texas 77217-2818
Tel: [phone]
Fax: [phone]

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PowlVac® ASD 27kV & 38kV Vacuum Circuit Breaker
IB-65100
Signal Words
As stated in ANSI Z535.4-2002, § 4.13-4.13.3 the
signal word is a word that calls attention to the
safety sign and designates a degree or level of
hazard seriousness. The signal words for product
safety signs are “Danger”, “Warning”, and
“Caution”. These words are defined as:
DANGER indicates an imminently hazardous
situation which, if not avoided, will result in
death or serious injury.
DANGERDANGER
!
WARNING indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury.
WARNINGWARNING
!
CAUTIONCAUTION
!
CAUTION indicates a potentially hazardous
situation which, if not avoided, may result in
minor or moderate injury.
Not stated in ANSI Z535.4-2002, § 4.13-4.13.3
as a signal word but used in this manual is
“IMPORTANT”. This is defined as:
IMPORTANT indicates a section of the manual
covering a non hazardous situation, but
one where Powell feels proper attention is
warranted.
IMPORTANTIMPORTANT
!
Qualified Person
For the purposes of this manual, a qualified person,
as stated in NFPA 70®, is one familiar with the
construction and operation of the equipment and
the hazards involved.
In addition to the above qualifications, one must
also be:
1) trained and authorized to energize,
deenergize, clear, ground, and tag circuits
and equipment in accordance with
established safety practices.
2) trained in the proper care and use of
personal protective equipment (PPE)
such as rubber gloves, hard hat, safety
glasses or face shields, flash clothing, etc.,
in accordance with established safety
practices.
3) trained in rendering first aid if necessary.

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IB-65100
Contents
Ch 1 General Information.................................................................................................1
A. SCOPE ................................................................................................................................................................2
B. PURPOSE.............................................................................................................................................................2
C. INSTRUCTION BULLETINS AVAILABLE ELECTRONICALLY.....................................................................................................2
Ch 2 Safety ........................................................................................................................3
A. SAFE WORK CONDITION .........................................................................................................................................3
B. SAFETY GUIDELINES ...............................................................................................................................................3
C. GENERAL.............................................................................................................................................................3
D. SPECIFIC ..............................................................................................................................................................4
E. X-RAYS ..............................................................................................................................................................4
F. SAFETY LABELS .....................................................................................................................................................5
Ch 3 Equipment Description.............................................................................................6
A. GENERAL.............................................................................................................................................................6
B. THE STORED ENERGY MECHANISM ............................................................................................................................6
1) Mechanical Description.......................................................................................................................................................... 6
2) Electrical Description.............................................................................................................................................................17
C. RACKING MECHANISM ......................................................................................................................................... 19
1) General Description...............................................................................................................................................................19
2) Circuit Breaker Racking Mechanism..................................................................................................................................20
D. CIRCUIT BREAKER COMPARTMENT INTERFACES ........................................................................................................... 20
1) Primary Disconnecting Contacts........................................................................................................................................20
2) Secondary Disconnecting Contacts ..................................................................................................................................21
3) Mechanism Operated Cell (MOC) Switch .........................................................................................................................21
4) Ground Connection ...............................................................................................................................................................21
E. VACUUM INTERRUPTER CONNECTIONS ..................................................................................................................... 21
F. OPERATING SOLENOIDS ....................................................................................................................................... 22
G. ANTI-PUMP RELAY ............................................................................................................................................. 22
H. MOTOR CUTOFF SWITCH...................................................................................................................................... 22
I. VACUUM INTERRUPTERS ....................................................................................................................................... 22
J. SHUTTER OPERATOR ........................................................................................................................................... 22
K. TEST POSITION INTERLOCK .................................................................................................................................... 22

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PowlVac® ASD 27kV & 38kV Vacuum Circuit Breaker
IB-65100
Contents
Ch 4 Installation..............................................................................................................23
A. RECEIVING ........................................................................................................................................................ 23
B. HANDLING........................................................................................................................................................ 23
C. STORAGE.......................................................................................................................................................... 23
D. PLACING THE CIRCUIT BREAKER INTO SERVICE............................................................................................................ 24
1) High-Voltage Insulation Integrity.......................................................................................................................................24
2) Vacuum Integrity....................................................................................................................................................................25
3) Control Voltage Insulation Integrity ..................................................................................................................................26
4) Mechanical Operation Check..............................................................................................................................................26
5) Electrical Operation Check...................................................................................................................................................27
E. INSERTING THE CIRCUIT BREAKER INTO THE SWITCHGEAR EQUIPMENT .............................................................................. 27
1) Inserting the Circuit Breaker to the Connected Position...............................................................................................27
2) Inserting the Circuit Breaker to the Test/Disconnect Position .....................................................................................29
F. REMOVING THE CIRCUIT BREAKER FROM THE SWITCHGEAR EQUIPMENT ............................................................................ 29
1) Removing the Circuit Breaker from the Connected to the Test/Disconnected Position........................................29
2) Removing the Circuit Breaker from the Test/Disconnect Position out of the Circuit Breaker Compartment...30
3) Removing the Circuit Breaker with Test Plug Interlock Engaged................................................................................30
Ch 5 Maintenance...........................................................................................................31
A. GENERAL DESCRIPTION ........................................................................................................................................ 31
1) Introduction.............................................................................................................................................................................31
2) Inspection and Cleaning ......................................................................................................................................................32
B. MECHANISM AREA ............................................................................................................................................. 33
1) Mechanical Operation ..........................................................................................................................................................33
2) Lubrication...............................................................................................................................................................................33
3) Closing Spring Removal........................................................................................................................................................37
4) Slow Closing of Mechanism.................................................................................................................................................38
5) Mechanism Adjustments......................................................................................................................................................38
6) Electrical Operation...............................................................................................................................................................44
C. VACUUM INTERRUPTER AND CONTACT AREA ............................................................................................................. 44
1) Vacuum Interrupter and Contact Erosion ........................................................................................................................44
2) Vacuum Integrity....................................................................................................................................................................45
3) Mechanical Adjustment of Vacuum Interrupters .................................................................................................................45
D. OPTIONAL MAINTENANCE PROCEDURES ................................................................................................................... 45
1) High Potential Tests ...............................................................................................................................................................45
2) Timing ......................................................................................................................................................................................46
3) Primary Resistance Check ....................................................................................................................................................46

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IB-65100
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Contents
Ch 6 Recommended Renewal Parts and Replacement Procedures ...............................47
A. ORDERING INSTRUCTIONS ..................................................................................................................................... 47
B. RECOMMENDED RENEWAL PARTS ........................................................................................................................... 47
C. REPLACEMENT PROCEDURES.................................................................................................................................. 47
1) Vacuum Interrupter Assembly.............................................................................................................................................48
2) Closing Coil Assembly ...........................................................................................................................................................56
3) Primary Shunt Trip Coil Assembly ......................................................................................................................................56
4) Secondary Shunt Trip Coil Assembly .................................................................................................................................57
5) Undervoltage Device Assembly (UV).................................................................................................................................57
6) Charging Motor Assembly ...................................................................................................................................................58
7) Anti-Pump Relay Assembly..................................................................................................................................................59
8) Latch Check Switch................................................................................................................................................................60
9) Motor Cutoff Switch Assembly............................................................................................................................................60
10) Auxiliary Switch ......................................................................................................................................................................61

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PowlVac® ASD 27kV & 38kV Vacuum Circuit Breaker
IB-65100
Figures
Tables
Table A Field Dielectric Test Values..........................................................................................................25
Table B Lubrication ..................................................................................................................................36
Table C Timing..........................................................................................................................................46
Table D Primary Resistance .....................................................................................................................46
Table E Primary Current Path ..................................................................................................................51
Table F Control Devices............................................................................................................................52
Table G Miscellaneous Parts....................................................................................................................54
Figure 1 Front View of PowlVac® ASD Circuit Breaker with Cover....................................................7
Figure 2 Rear View of PowlVac® ASD Circuit Breaker........................................................................8
Figure 3 PowlVac® ASD Circuit Breaker Compartment.....................................................................9
Figure 4 Operating Pushrod Assembly of PowlVac® 38kV ASD Circuit Breaker.............................10
Figure 5 Ground Connection of PowlVac® ASD 38kV Circuit Breaker ............................................10
Figure 6 Front View of PowlVac® ASD Circuit Breaker without Cover ............................................12
Figure 7 Close-Up Front View of PowlVac® ASD Circuit Breaker Mechanism.................................13
Figure 8 Cam and Fundamental Linkage Positions........................................................................14
Figure 9 Mechanical and Trip Linkages...........................................................................................15
Figure 10 Typical Control Scheme.....................................................................................................18
Figure 11 Test Plug Jumper Interlock ................................................................................................20
Figure 12 Secondary Disconnect Receptacle and Secondary Disconnect Device Completed.........20
Figure 13 Lifting the Circuit Breaker by Crane..................................................................................23
Figure 14 Push to Trip Knob & Racking Access Door.........................................................................28
Figure 15 Racking Indicator Flags & Racking Handle.......................................................................28
Figure 16 Lubrication ........................................................................................................................34
Figure 17 Lubrication (cont) ..............................................................................................................35
Figure 18 Main Closing Spring AssemblyCompressed for Removal.................................................37
Figure 19 Main Closing Spring AssemblyInstalled ...........................................................................37
Figure 20 Primary & Secondary Trip Prop Adjustment.....................................................................39
Figure 21 Feeler Gauge......................................................................................................................40
Figure 22 Trip Armature Assembly Left View....................................................................................41
Figure 23 Trip Armature Assembly Right View .................................................................................42
Figure 24 Circuit Breaker Trip Roller .................................................................................................42
Figure 25 Latch Check Switch Adjustment........................................................................................43
Figure 26 Vacuum Interrupter Assembly Drawing (38kV, 1200A)....................................................50
Figure 27 Primary Current Path ........................................................................................................51
Figure 28 Control Devices..................................................................................................................53

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IB-65100
General Information
WARNINGWARNING
!
The equipment described in this document may contain high voltages and currents which can
cause serious injury or death.
The equipment is designed for use, installation, and maintenance by knowledgeable users of such
equipment having experience and training in the field of high voltage electricity. This document
and all other documentation shall be fully read, understood, and all warnings and cautions
shall be abided by. If there are any discrepancies or questions, the user shall contact Powell
immediately at 1.800.480.7273.
WARNINGWARNING
!
Before any adjustment, servicing, part replacement, or any other act is performed requiring
physical contact with the electrical working components or wiring of this equipment, the power
supply must be disconnected. Failure to follow this warning may result in injury or death.
IMPORTANTIMPORTANT
!
The information in this instruction bulletin is not intended to explain all details or variations of
the PowlVac® ASD 27kV & 38kV circuit breakers, nor to provide for every possible contingency
or hazard to be met in connection with installation, testing, operation, and maintenance of the
equipment. For additional information and instructions for particular problems, which are not
presented sufficiently for the user’s purposes, contact Powell at 1.800.480.7273.
Ch 1 General Information

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PowlVac® ASD 27kV & 38kV Vacuum Circuit Breaker
IB-65100
General Information
A. SCOPE
The information in this instruction bulletin
describes the following PowlVac ASD 38kV
vacuum circuit breakers:
• 38PV40ASD - 1200A & 2000A
• 27PV25ASD - 1200A & 2000A
B. PURPOSE
The information in this instruction bulletin is
intended to provide information required to
properly operate and maintain the
PowlVac ASD 38kV vacuum circuit breakers
described in Ch 1 General Information,
A. SCOPE.
This instruction bulletin provides:
1) Safety guidelines
2) General descriptions of the operation and
maintenance of the PowlVac ASD 38kV
vacuum circuit breaker
3) Instructions for installation and placing the
circuit breaker into service
4) Instructions for part replacement
5) Information for ordering renewal parts
6) Procedure for critical adjustments
7) Illustrations, photographs, and description
of the circuit breaker
The illustrations contained in this document
may not represent the exact construction
details of each particular type of replacement
circuit breaker. The illustrations in this
document are provided as general information
to aid in showing component locations only.
All illustrations are shown using deenergized
equipment.
Be sure to follow the appropriate safety
precaution while handling any of the
equipment. Failure to do so may result in
serious injury or death.
WARNINGWARNING
!
To the extent required, the products described
herein meet the applicable ANSI, IEEE, and
NEMA Standards; however, no such assurance
is given with respect to local codes and
ordinances which may vary greatly.
C. INSTRUCTION BULLETINS AVAILABLE ELECTRONICALLY
For more information visit
www.powellind.com. To contact the Powell
Service Division call 1.800.480.7273 or
713.944.6900, or email
[e-mail].