Safety POWELL PowlVac-ND 4 Series Training manual

Instruction Bulletin - 01.4IB.77020
PowlVac-ND® and PowlVac-NDA™ Series 4
Vacuum Circuit Breakers
5kV / 1200A & 2000A / 36kA & 50kA
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01.4IB.77020
PowlVac-ND®and PowlVac-NDA™Series 4
Vacuum Circuit Breakers
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Contact Information
Powell Electrical Systems, Inc.
powellind.com
[e-mail]
Service Division
7232 Airport Blvd.
Houston, Texas 77061
713.944.6900 phone
713.948.4569 fax

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Signal Words
As stated in ANSI Z535.4-2007, 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”, “Caution”, and “Notice”.
These words are defined as:
DANGER indicates an imminently hazardous
situation which, if not avoided, will result in
death or serious injury.
!
DANGER
!
WARNING
WARNING indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury.
!
CAUTION
CAUTION, used with the safety alert symbol,
indicates a hazardous situation which, if not
avoided, could result in minor or moderate
injury.
CAUTION, used without the safety alert
symbol, is used to address practices not
related to personal injury.
CAUTION
NOTICE
NOTICE is used to address practices not related
to personal injury.
Qualified Person
For the purposes of this manual, a qualified
person, as stated in NFPA 70E®, is one who has
skills and knowledge related to the construction
and operation of the electrical equipment and
installations and has received safety training to
recognize and avoid 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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01.4IB.77020
PowlVac-ND®and PowlVac-NDA™Series 4
Vacuum Circuit Breakers
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01.4IB.77020
Contents
Ch 1 General Information ................................................................................................1
A. Scope ...............................................................................................................................................................2
B. purpoSe ............................................................................................................................................................2
c. InStructIon BulletInS AvAIlABle electronIcAlly ....................................................................................................2
D. ASSocIAteD BulletInS ..........................................................................................................................................2
Ch 2 Safety .......................................................................................................................3
A. SAfe Work conDItIon .........................................................................................................................................3
B. SAfety GuIDelIneS ...............................................................................................................................................3
c. GenerAl ............................................................................................................................................................4
D. SpecIfIc .............................................................................................................................................................4
e. X-rAyS .............................................................................................................................................................5
f. SAfety lABelS ....................................................................................................................................................5
Ch 3 Equipment Description ............................................................................................6
A. GenerAl DeScrIptIon ..........................................................................................................................................6
B. the StoreD enerGy MechAnISM ............................................................................................................................6
1) Mechanical Description ......................................................................................................................................................... 6
2) Electrical Description ............................................................................................................................................................16
c. rAckInG MechAnISM for poWlvAc-nD®SerIeS 4 cIrcuIt BreAker ........................................................................ 17
1) General Description ..............................................................................................................................................................17
2) Closed Door Racking Mechanism .....................................................................................................................................19
D. AutoMAtIc rAckInG MechAnISM for poWlvAc-nDA™ SerIeS 4 cIrcuIt BreAker .................................................... 20
1) General Description ..............................................................................................................................................................20
2) Racking Mechanism .............................................................................................................................................................21
e. cIrcuIt BreAker coMpArtMent InterfAceS .......................................................................................................... 22
1) Primary Disconnecting Devices .........................................................................................................................................22
2) Secondary Disconnecting Devices ....................................................................................................................................22
3) MOC (Mechanism Operated Cell Switch) Actuator .......................................................................................................22
4) TOC (Truck Operated Cell Switch) Actuator ....................................................................................................................22
5) Ground Connection ..............................................................................................................................................................22
6) Shutter Rollers ........................................................................................................................................................................23
7) Anti-Rollout Latch .................................................................................................................................................................23
f. vAcuuM InterrupterS ....................................................................................................................................... 23
G. vAcuuM Interrupter connectIonS ..................................................................................................................... 23

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01.4IB.77020
PowlVac-ND®and PowlVac-NDA™Series 4
Vacuum Circuit Breakers
Contents
Ch 4 Installation .............................................................................................................24
A. receIvInG ........................................................................................................................................................ 24
B. hAnDlInG ....................................................................................................................................................... 24
c. StorAGe ......................................................................................................................................................... 25
D. plAcInG the cIrcuIt BreAker Into ServIce ........................................................................................................... 26
1) High Voltage Insulation Integrity ......................................................................................................................................26
2) Vacuum Integrity ...................................................................................................................................................................27
3) Control Voltage Insulation Integrity .................................................................................................................................28
4) Mechanical Operation Check .............................................................................................................................................29
5) Electrical Operation Check ..................................................................................................................................................30
6) Emergency Racking Mechanism Check (PowlVac-NDA™Series 4 Circuit Breaker Only) .....................................30
e. rAckInG proceDureS for poWlvAc-nD®SerIeS 4 cIrcuIt BreAker ........................................................................ 31
1) Prior to Inserting the Circuit Breaker into the Circuit Breaker Compartment .........................................................32
2) Inserting the Circuit Breaker to the Test/Disconnected Position ................................................................................33
3) Inserting the Circuit Breaker to the Connected Position ..............................................................................................34
4) Removing the Circuit Breaker from the Connected to the Test/Disconnected Position .......................................35
5) Removing the Circuit Breaker from the Test/Disconnected Position out of the
Circuit Breaker Compartment ............................................................................................................................................36
6) Remote Racking .....................................................................................................................................................................36
f. rAckInG proceDureS for poWlvAc-nDA™ SerIeS 4 cIrcuIt BreAker .................................................................... 37
1) Prior to Inserting the Circuit Breaker into the Circuit Breaker Compartment .........................................................37
2) Inserting the Circuit Breaker to the Test/Disconnected Position ................................................................................38
3) Inserting the Circuit Breaker to the Connected Position ..............................................................................................39
4) Emergency Racking In Procedure ......................................................................................................................................39
4) Removing the Circuit Breaker from the Connected to the Test/Disconnected Position .......................................40
5) Removing the Circuit Breaker from the Test/Disconnected Position out of the
Circuit Breaker Compartment ............................................................................................................................................41
6) Emergency Racking Out Procedure ..................................................................................................................................41
Ch 5 Maintenance ..........................................................................................................43
A. GenerAl DeScrIptIon ....................................................................................................................................... 43
1) Introduction ............................................................................................................................................................................43
2) Inspection and Cleaning ......................................................................................................................................................44
B. MechAnISM AreA ............................................................................................................................................. 45
1) Mechanical Operation .........................................................................................................................................................45
2) Lubrication ..............................................................................................................................................................................45
3) Closing Spring Removal .......................................................................................................................................................49
4) Slow Closing of Mechanism ................................................................................................................................................50
5) Mechanism Adjustments .....................................................................................................................................................50
6) Electrical Operation ..............................................................................................................................................................55

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01.4IB.77020
c. vAcuuM Interrupter AnD contAct AreA ............................................................................................................ 55
1) Vacuum Interrupter and Contact Erosion .......................................................................................................................55
2) Sliding Contact Finger Wear ...............................................................................................................................................56
3) Vacuum Integrity ...................................................................................................................................................................56
4) Mechanical Adjustment of Vacuum Interrupters ................................................................................................................56
D. optIonAl MAIntenAnce proceDureS .................................................................................................................. 56
1) High Potential Tests ..............................................................................................................................................................56
2) Timing .....................................................................................................................................................................................57
3) Primary Resistance Check ...................................................................................................................................................57
Ch 6 Recommended Renewal Parts and Replacement Procedures ..............................58
A. orDerInG InStructIonS ..................................................................................................................................... 58
B. recoMMenDeD reneWAl pArtS .......................................................................................................................... 58
c. replAceMent proceDureS ................................................................................................................................. 58
1) Vacuum Interrupter Assembly ............................................................................................................................................59
2) Closing Coil Assembly ...........................................................................................................................................................59
3) Primary Shunt Trip Coil Assembly ......................................................................................................................................59
4) Secondary Shunt Trip Coil Assembly .................................................................................................................................59
5) Undervoltage Device Assembly .........................................................................................................................................59
6) Charging Motor Assembly ..................................................................................................................................................59
7) Anti-Pump Relay Assembly .................................................................................................................................................59
8) Latch Check Switch ...............................................................................................................................................................59
9) Motor Cutoff Switch Assembly ...........................................................................................................................................59
10) Auxiliary Switch .....................................................................................................................................................................59
Contents

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01.4IB.77020
PowlVac-ND®and PowlVac-NDA™Series 4
Vacuum Circuit Breakers
Figures
Figure 1 Typical PowlVac-ND®Series 4 Vacuum Circuit Breaker .................................8
Figure 2 Typical PowlVac-NDA™Series 4 Vacuum Circuit Breaker .............................8
Figure 3 PowlVac-NDA™Circuit Breaker - Exterior View .............................................9
Figure 4 PowlVac-NDA™Circuit Breaker - Interior View ............................................10
Figure 5 Cam and Fundamental Linkage Positions ...................................................11
Figure 6 Mechanism and Trip Linkages .....................................................................12
Figure 7 Operation Sequence ....................................................................................14
Figure 8 Typical Control Scheme ................................................................................15
Figure 9 Closed Door Racking Mechanism and Interlock .........................................19
Figure 10 Circuit Breaker in Shipping Carton ..............................................................24
Figure 11 Circuit Breaker on Crane ..............................................................................25
Figure 12 Secondary Disconnect Device ......................................................................34
Figure 13 Racking Handle Insertion ............................................................................34
Figure 14 Circuit Breaker Anti-Rollout Latch ...............................................................36
Figure 15 Lubrication ...................................................................................................47
Figure 16 Lubrication (cont) .........................................................................................48
Figure 17 Main Closing Spring Assembly Installed .....................................................49
Figure 18 Main Closing Spring Assembly Compressed for Removal ...........................49
Figure 19 Primary & Secondary Trip Prop Adjustment ...............................................51
Figure 20 Feeler Gauge ................................................................................................52
Figure 21 Latch Check Switch Adjustment ...................................................................53
Figure 22 Measurement of Open Position ...................................................................55
Figure 23 Measurement of Closed Position .................................................................55
Figure 24 Primary Current Path ...................................................................................60
Figure 25 Control Devices ............................................................................................62
Tables
Table A Field Dielectric Test Values .................................................................................26
Table B Lubrication .........................................................................................................46
Table C Timing .................................................................................................................57
Table D Primary Resistance .............................................................................................57
Table E Primary Current Path ..........................................................................................60
Table F Control Devices ...................................................................................................61
Table G Miscellaneous Parts ...........................................................................................63

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General Information
01.4IB.77020
Ch 1 General Information
!
WARNING
The equipment described in this document may contain high voltages and currents which can
cause death or serious injury.
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.
!
WARNING
Prior to adjustments, servicing, maintenance, or any act requiring the operator to make physical
contact with the equipment, the power source must be disconnected and the equipment grounded.
Failure to do so may result in death or serious injury.
NOTICE
The information in this instruction bulletin is not intended to explain all details or variations of the
Powell equipment, 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.
Powell reserves the right to discontinue and to change specifications at any time without incurring
any obligation to incorporate new features in products previously sold.
NOTICE