Powell 05PV36ARMX-4, 15PV50ARMX-4, 15PV25ARMX-4, 15PV36ARMX-4, 15PV63ARMX-4 Instruction Bulletin

...

Instruction Bulletin - 01.4IB.60306 PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV 1200A, 2000A, & 3000A 25kA, 36kA, 50kA, & 63kA

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

Contact Information

Powell Electrical Systems, Inc.

powellind.com

info@powellind.com

01.4IB.60306

Service Division

PO Box 12818

Houston, Texas 77217-2818

Tel: 713.944.6900 Fax: 713.948.4569

01.4IB.60306

DANGER

WARNING

CAUTION

NOTICE

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.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious 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.

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.

NOTICE is used to address practices not related to personal injury.

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

01.4IB.60306

This page is left blank intentionally.

01.4IB.60306

Ch 1 General Information .................................................................................................1

A. Scope ................................................................................................................................................................2

B. purpoSe .............................................................................................................................................................2

c. InStructIon BulletInS AvAIlABle electronIcAlly .....................................................................................................3

D. ASSocIAteD BulletInS ..........................................................................................................................................3

Ch 2 Safety ........................................................................................................................ 4

A. SAfe Work conDItIon .........................................................................................................................................4

B. SAfety GuIDelIneS ...............................................................................................................................................5

c. GenerAl .............................................................................................................................................................6

D. SpecIfIc ..............................................................................................................................................................6

e. X-rAyS ..............................................................................................................................................................7

f. SAfety lABelS .....................................................................................................................................................7

Ch 3 Equipment Description ............................................................................................. 8

A. GenerAl .............................................................................................................................................................8

B. the StoreD enerGy MechAnISM ............................................................................................................................8

1) Mechanical Description .......................................................................................................................................................... 8

2) Electrical Description .............................................................................................................................................................19

c. AutoMAtIc rAckInG MechAnISM ......................................................................................................................... 20

1) Breaker Position Indicator ....................................................................................................................................................20

2) Interlocking ..............................................................................................................................................................................20

3) Blocking Interlock ...................................................................................................................................................................21

4) Racking Mechanism ..............................................................................................................................................................21

D. 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

e. vAcuuM InterrupterS ....................................................................................................................................... 23

f. vAcuuM Interrupter connectIon ....................................................................................................................... 23

1) 25kA, 36kA, & 50kA Rated Circuit Breakers ......................................................................................................................23

2) 63kA Rated Circuit Breakers ................................................................................................................................................. 23

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

01.4IB.60306

Contents

Ch 4 Installation..............................................................................................................24

A. receIvInG ........................................................................................................................................................ 24

B. hAnDlInG ........................................................................................................................................................ 25

c. StorAGe .......................................................................................................................................................... 25

D. plAcInG the cIrcuIt BreAker Into ServIce ............................................................................................................ 26

1) High Voltage Insulation Integrity ....................................................................................................................................... 26

2) Vacuum Integrity .................................................................................................................................................................... 28

3) Control Voltage Insulation Integrity .................................................................................................................................. 29

4) Mechanical Operation Check .............................................................................................................................................. 29

5) Electrical Operation Check ...................................................................................................................................................30

e. InSertInG the cIrcuIt BreAker Into the cIrcuIt BreAker coMpArtMent .................................................................... 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) Emergency Racking In Procedure .......................................................................................................................................34

f. reMovInG the cIrcuIt BreAker froM the cIrcuIt BreAker coMpArtMent ................................................................. 35

1) Removing the Circuit Breaker from the Connected to the Test/Disconnected Position ........................................35

2) Removing the Circuit Breaker from the

Test/Disconnected Position out of the Circuit Breaker Compartment ......................................................................36

3) Emergency Racking Out Procedure ...................................................................................................................................37

Ch 5 Maintenance ........................................................................................................... 38

A. GenerAl DeScrIptIon ........................................................................................................................................ 38

1) Introduction .............................................................................................................................................................................38

2) Inspection and Cleaning ......................................................................................................................................................39

B. MechAnISM AreA ............................................................................................................................................. 39

1) Mechanical Operation .......................................................................................................................................................... 39

2) Lubrication ...............................................................................................................................................................................40

3) Closing Spring Removal ........................................................................................................................................................ 44

4) Slow Closing of Mechanism .................................................................................................................................................45

5) Mechanism Adjustments ......................................................................................................................................................45

6) Electrical Operation ...............................................................................................................................................................50

c. vAcuuM Interrupter AnD contAct AreA ............................................................................................................. 50

1) Vacuum Interrupter and Contact Erosion ........................................................................................................................50

2) Vacuum Integrity .................................................................................................................................................................... 50

3) Mechanical Adjustment of Vacuum Interrupters ...........................................................................................................50

D. optIonAl MAIntenAnce proceDureS ................................................................................................................... 50

1) High Potential Tests ...............................................................................................................................................................50

2) Timing .......................................................................................................................................................................................51

3) Primary Resistance Check ....................................................................................................................................................51

01.4IB.60306

Contents

Ch 6 Recommended Renewal Parts and Replacement Procedures ...............................52

A. orDerInG InStructIonS ..................................................................................................................................... 52

B. recoMMenDeD reneWAl pArtS ........................................................................................................................... 52

c. replAceMent proceDureS .................................................................................................................................. 52

1) Vacuum Interrupter Assembly ............................................................................................................................................. 53

2) Sliding Contact Finger Assembly (for circuit breaker rated up to 50kA only) ..........................................................53

3) Closing Coil Assembly ...........................................................................................................................................................53

4) Primary Shunt Trip Coil Assembly ......................................................................................................................................53

5) Secondary Shunt Trip Coil Assembly .................................................................................................................................53

6) Undervoltage Device Assembly (UV) ................................................................................................................................. 53

7) Charging Motor Assembly ...................................................................................................................................................53

8) Anti-Pump Relay Assembly ..................................................................................................................................................54

9) Latch Check Switch ................................................................................................................................................................ 54

10) Motor Cutoff Switch Assembly ............................................................................................................................................54

11) Auxiliary Switch ......................................................................................................................................................................54

12) Ground Connection Assembly ............................................................................................................................................54

13) Racking Motor .........................................................................................................................................................................54

iii

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

01.4IB.60306

Figures

Figure 1 PowlVac® ARG & ARM Series 4 Circuit Breaker Front View with Cover ..........9

Figure 2 PowlVac® ARG & ARM Series 4 Circuit Breaker Front View without Cover ..10

Figure 3 PowlVac ARG & ARM Series 4 Circuit Breaker Rear View .............................11

Figure 4 Primary Current Closeups ............................................................................12

Figure 5 Cam and Fundamental Linkage Positions ...................................................14

Figure 6 Mechanism and Trip Linkages ...................................................................... 15

Figure 7 Operation Sequence .....................................................................................17

Figure 8 Typical Control Scheme ................................................................................18

Figure 9 Circuit Breaker in Shipping Carton ...............................................................24

Figure 10 Circuit Breaker with Shipping Bracket .........................................................24

Figure 11 Circuit Breaker on Crane ...............................................................................25

Figure 12 Secondary Disconnect Override Device ....................................................... 30

Figure 13 Removing Circuit Breaker from Compartment ............................................ 36

Figure 14 Lubrication (50kA shown) ............................................................................42

Figure 15 Lubrication (50kA shown) (cont.) .................................................................43

Figure 16 Main Closing Spring Assembly Compressed for Removal ...........................44

Figure 17 Main Closing Spring Assembly Installed .....................................................44

Figure 18 Primary Trip Prop Adjustment ......................................................................46

Figure 19 Feeler Gauge .................................................................................................47

Figure 20 Latch Check Switch Adjustment ...................................................................48

Figure 21 Primary Current Path ....................................................................................56

Figure 22 Control Devices ............................................................................................. 58

01.4IB.60306

Tables

Table A Field Dielectric Test Values ..................................................................................27

Table B Lubrication ..........................................................................................................41

Table C Timing .................................................................................................................. 51

Table D Primary Resistance .............................................................................................51

Table E Primary Current Path ..........................................................................................55

Table F Control Devices ....................................................................................................57

Table G Miscellaneous Parts ............................................................................................ 59

Table H Miscellaneous Parts (cont.) .................................................................................60

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

01.4IB.60306

This page is left blank intentionally.

01.4IB.60306

WARNING

NOTICE

Ch 1 General Information

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.

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.

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.

General Information

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

WARNING

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

01.4IB.60306

A. Scope

The information in this instruction bulletin describes the following PowlVac® ARG (Automatic Racking Generator) & ARM (Automatic Racking Mechanism) Series 4 vacuum circuit breakers:

• 05PV36ARMX-4 1200, 2000, & 3000A

• 05PV36ARMM-4 1200, 2000, & 3000A

• 05PV50ARMX- 1200, 2000, & 3000A

• 05PV50ARMM-4 1200, 2000, & 3000A

• 05PV63ARMX-4 1200, 2000, & 3000A

• 05PV63ARMM-4 1200, 2000, & 3000A

• 15PV25ARMX-4 1200, 2000, & 3000A

• 15PV25ARMM-4 1200, 2000, & 3000A

• 15PV36ARMX-4 1200, 2000, & 3000A

• 15PV36ARMM-4 1200, 2000, & 3000A

• 15PV50ARMX-4 1200, 2000, & 3000A

• 15PV50ARMM-4 1200, 2000, & 3000A

B. purpoSe

The information in this instruction bulletin is intended to provide details required to properly install, operate, and maintain the PowlVac ARG & ARM Series 4 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 ARG & ARM Series 4 vacuum circuit breakers

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 breakers

• 15PV63ARMX-4 1200, 2000, & 3000A

• 15PV63ARMM-4 1200, 2000, & 3000A

• 15PV63ARGX-4 1200, 2000, & 3000A

• 15PV63ARGM-4 1200, 2000, & 3000A

The illustrations contained in this document may not represent the exact construction details of the PowlVac ARG & ARM Series 4 vacuum circuit breakers. The illustrations in this document are provided as general information to aid in showing component locations.

All illustrations and photos are shown using deenergized equipment.

Follow the appropriate safety precautions while handling any of the equipment. Failure to do so may result in death or serious injury.

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.

General Information

01.4IB.60306

NOTICE

c. InStructIon BulletInS AvAIlABle electronIcAlly

Changes to the instruction bulletin may be implemented at any time and without notice. Go to powellind.com to ensure use of the current instruction bulletin for Powell equipment.

For more information visit powellind.com. To contact the Powell Service Division call

1.800.480.7273 or 713.944.6900, or email

info@powellservice.com.

For specific questions or comments pertaining to this instruction bulletin email

documents@powellind.com with the IB number

in the subject line.

D. ASSocIAteD BulletInS

• 01.4IB.51000C PowlVac® Metal-Clad Switchgear 5kV & 15kV

• 01.4IB.51200C PowlVac-AR® Arc Resistant Switchgear 5kV & 15kV

General Information

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

01.4IB.60306

Ch 2 Safety

A. SAfe Work conDItIon

The information in Section A is quoted from

NFPA 70E 2018 - Article 120, 120.5 Establishing an Electrically Safe Work Condition.

120.5 Process or Establishing and Verifying an Electrically Safe Work Condition. Establishing

and verifying an electrically safe condition shall include all of the following steps, which shall be performed in the order presented, if feasible:

1. Determine all possible sources of electrical supply to the specific equipment. Check applicable up-to-date drawings, diagrams, and identification tags.

2. After properly interrupting the load current, open the disconnecting device(s) for each source.

N Exception No. 1: An adequately rated

permanently mounted test device shall be permitted to be used to verify the absence of voltage of the conductors or circuit parts at the work location, provided it meets the all following requirements: (1) It is permanently mounted and installed in accordance with the manufacturer’s instructions and tests the conductors and circuit parts at the point of work; (2) It is listed and labeled for the purpose of verifying the absence of voltage; (3) It tests each phase conductor or circuit part both phase-to-phase and phase-toground; (4) The test device is verified as operating satisfactorily on any known voltage source before and after verifying the absence of voltage.

N Exception No. 2: On electrical systems over

1000 volts, noncontact test instruments shall be permitted to be used to test each phase conductor.

3. Wherever possible, visually verify that all blades of the disconnecting devices are fully open or that drawout-type circuit breakers are withdrawn to the fully disconnected position.

4. Release stored electrical energy.

5. Release or block stored mechanical energy.

6. Apply lockout/tagout devices in accordance with a documented and established procedure.

7. Use an adequately rated portable test instrument to test each phase conductor or circuit part to verify it is de-energized. Test each phase conductor or circuit part both phase-to-phase and phase-to-ground. Before and after each test, determine that the test instrument is operating satisfactorily through verification on any known voltage source.

Informational Note No. 1: See UL 61010-1,

Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use, Part 1: General Requirements, for

rating, overvoltage category, and design requirements for voltage measurement and test instruments intended for use on electrical system 1000 volts and below.

N Informational Note No. 2: For additional

information on rating and design requirements for voltage detectors, refer to IEC 61243-1, Live Working - Voltage

Detectors - Part 1: Capacitive type to be used for voltages exceeding 1kV a.c., or IEC 61243- 2, Live Working - Voltage Detectors - Part 2: Resistive type to be used for voltages of 1kV to 36kV a.c., or IEC 61243-3, Live Working Voltage Detectors - Part 3: Two-pole voltage type.

Safety

01.4IB.60306

8. Where the possibility of induced voltages or stored electrical energy exists, ground the phase conductors or circuit parts before touching them. Where it could be reasonably anticipated that the conductors or circuit parts being de-energized could contact other exposed energized conductors or circuit parts, apply temporary protective grounding equipment in accordance with the following:

a.. Placement. Temporary protective

grounding equipment shall be placed at such locations and arranged in such a manner as to prevent each employee from being exposed to a shock hazard (i.e., hazardous differences in electrical potential). The location, sizing, and application of temporary protective grounding equipment shall be identified as part of the employer’s job planning.

b. Capacity. Temporary protective

grounding equipment shall be capable of conducting the maximum fault current that could flow at the point of grounding for the time necessary to clear the fault.

N Informational Note: ATSM F855, Standard

Specification for Temporary Protective Grounds to be Used on De-energized Electric Power Lines and Equipment, is an example

of a standard that contains information on capacity of temporary protective grounding equipment.

B. SAfety GuIDelIneS

Study this instruction bulletin and all other associated documentation before uncrating the circuit breakers.

Each user has the responsibility to instruct and supervise all personnel associated with usage, installation, operation, and maintenance of this equipment on all safety procedures.

Furthermore, each user has the responsibility of establishing a safety program for each type of equipment encountered.

The circuit breakers described in this instruction bulletin are operated by a high-energy, high-speed mechanism that is interlocked to provide specific operating sequences. It is mandatory that the following rules be observed to ensure the safety of personnel associated with usage, installation, operation, and maintenance of this circuit breaker.

The safety rules in this instruction bulletin are not intended to be a complete safety program. The rules are intended to cover only some of the important aspects of personnel safety related to PowlVac® ARG & ARM Series 4 vacuum circuit breakers.

Safety

c. Impedance. Temporary protective

grounding equipment and connections shall have an impedance low enough to cause immediate operation of protective devices in case of unintentional energizing of the electric conductors or circuit parts.

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

01.4IB.60306

c. GenerAl

1. Only supervised and qualified personnel trained in the usage, installation, operation, and maintenance of a circuit breaker shall be allowed to work on this equipment. It is mandatory that the appropriate instruction bulletins, supplements, and service advisories be studied, understood, and followed.

2. Maintenance programs must be consistent with both customer experience and manufacturer’s recommendations, including service advisories and instruction bulletin(s).

A well planned and executed routine maintenance program is essential for circuit breaker’s reliability and safety.

3. Service conditions and circuit breaker applications shall also be considered in the development of safety programs. Variables include ambient temperature; humidity; actual continuous current; thermal cycling; number of operations; interrupting duty; and any adverse local conditions including excessive dust, ash, corrosive atmosphere, vermin and insect infestations.

D. SpecIfIc

1. DO NOT WORK ON AN ENERGIZED CIRCUIT BREAKER. If work must be

performed on a circuit breaker, remove it from service and remove it from the metal-clad switchgear.

2. DO NOT WORK ON A CIRCUIT BREAKER

WITH THE CONTROL CIRCUIT ENERGIZED.

3. EXTREME CARE MUST BE EXERCISED TO KEEP ALL PERSONNEL, TOOLS, AND OTHER OBJECTS CLEAR OF MECHANISMS WHICH ARE TO BE OPERATED, DISCHARGED, OR RELEASED.

These circuit breakers utilize stored energy

mechanisms. These mechanisms must be serviced only by skilled and knowledgeable personnel capable of releasing each spring load in a controlled manner. Detailed information regarding these mechanisms is found in this instruction bulletin.

4. DO NOT ATTEMPT TO CLOSE THE CIRCUIT

BREAKER MANUALLY ON AN ENERGIZED CIRCUIT.

5. DO NOT USE AN OPEN CIRCUIT BREAKER AS THE SOLE MEANS OF ISOLATING A HIGH VOLTAGE CIRCUIT. For complete

isolation, the circuit breaker shall be in the disconnected position or shall be withdrawn completely.

6. ALL COMPONENTS SHALL BE

DISCONNECTED BY MEANS OF A VISIBLE BREAK AND SECURELY GROUNDED FOR SAFETY OF PERSONNEL PERFORMING MAINTENANCE OPERATIONS ON THE CIRCUIT BREAKERS.

Safety

01.4IB.60306

NOTICE

7. Interlocks are provided to ensure the proper operating sequences of the circuit breakers and for the safety of the user. If for any reason an interlock does not function as described, do not make any adjustments, modification, or deform the parts. DO

NOT FORCE THE PARTS INTO POSITION. CONTACT POWELL FOR INSTRUCTIONS.

e. X-rAyS

When high voltage is applied across the contacts of a vacuum interrupter, there is the possibility of generation of X-rays. The intensity of the X-radiation is dependent on the peak voltage and the contact gap. At the normal operating voltage for this type of equipment, the radiation levels are negligible. At the voltages specified for testing, test personnel shall be in front of the circuit breaker such that the two layers of steel used in the frame and front cover construction are between the test personnel and the vacuum interrupters, and that the test personnel be no closer than one meter (3’) from the front of the circuit breaker.

THE CIRCUIT BREAKER SHALL BE EITHER FULLY OPEN, OR FULLY CLOSED WHEN MAKING HIGH POTENTIAL TESTS. DO NOT TEST WITH CONTACTS PARTIALLY OPEN.

f. SAfety lABelS

The equipment described in this document has DANGER, WARNING, CAUTION, and instruction labels attached to various locations. All equipment DANGER, WARNING, CAUTION, and instruction labels shall be observed when the circuit breaker is handled, operated, or maintained.

Warning and Caution labels are located in various places. Do not remove or deface any of these warning/caution labels.

Safety

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

NOTICE

CAUTION

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

01.4IB.60306

Ch 3 Equipment Description

A. GenerAl

Powell is committed to continuous product improvement.

It is possible that improvements occurred between revisions to this document and therefore, may not be described in these instructions. If the equipment does not resemble the photographs and descriptions contained herein, contact Powell before attempting to perform any actions.

PowlVac® circuit breakers use sealed vacuum interrupters (Figure 3, f) to control the primary circuit. The primary connections to the associated metal-clad switchgear are made by parallel copper busbars terminating in multiple contact fingers of the primary disconnecting devices (Figure 3, c & g). The primary disconnecting devices, busbars, and vacuum interrupter assemblies are supported by insulators (Figure 3, b) specifically designed for the application.

The primary current path side of the circuit breaker is considered the rear of the circuit breaker, while the side with the cover containing the various indicators and manual operators is considered the front of the circuit breaker. By removing the front cover, the operating mechanisms of the circuit breaker are exposed. The stored energy mechanism assembly provides motion to each of the vacuum interrupters, moving contact assemblies through operating pushrods (Figure 4, h & p). In the same metal enclosed compartment as the stored energy mechanism is the circuit breaker racking mechanism and interlocks which control the movement of the

circuit breaker between the test/disconnected and connected positions. The racking mechanism provides the motion to engage/disengage the primary disconnecting devices and to open/close the shutters in metal-clad switchgear.

B. the StoreD enerGy MechAnISM

1) Mechanical Description

The stored energy mechanism is located in the front of the circuit breaker behind the front cover. The front cover is held in place by ten (10) cover bolts (Figure 1, a) that may be removed, allowing access to the stored energy mechanism and its interlocks, auxiliary switches, racking mechanism, and other control devices.

Prior to removing the front cover, ensure the circuit breaker is in the OPEN position and the main closing spring is fully discharged. Failure to do so may result in injury.

On the escutcheon of the stored energy mechanism, there are two (2) indicators that show the various states of operation of the mechanism and two (2) manual operators that will open/close the stored energy mechanism. The circuit breaker nameplate (Figure 1, h) is also located on the mechanism escutcheon. If for any reason the escutcheon is removed from the circuit breaker, it shall be verified that the serial number contained on the nameplate matches the engraved serial number plate (Figure 3, q) permanently affixed to the rear of the circuit breaker frame prior to installing the escutcheon.

Equipment Description

01.4IB.60306

Figure 1 PowlVac® ARG & ARM Series 4 Circuit Breaker Front View with Cover

a. Cover Bolts b. Circuit Breaker Monitor IR Window c. Front Cover d. Breaker Position Indicator e. Emergency Racking Drive Shaft Shutter f. Padlock Seal g. Padlock Provision - Movable Arm h. Nameplate I. Interlock Window Assembly j. Manual Trip Operator

k. Manual Charging Crank l. MOC Actuator m. Handle n. Circuit Breaker Open/Closed Indicator o. Secondary Disconnect Receptacle p. Manual Close Operator q. Secondary Disconnect Latch r. Operation Counter s. Spring Charge Indicator

Equipment Description

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

Figure 2 PowlVac® ARG & ARM Series 4 Circuit Breaker Front View without Cover

01.4IB.60306

l n o

a. Anti-Pump Relay b. Circuit Breaker Monitor™

(Optional)

c. Opening Spring d. Main Closing Spring e. Emergency Racking Drive Shaft f. Anti-Bellows Springs (63kA only) g. Racking Motor h. Shock Absorber (Dashpot) i. Secondary Trip Prop j. MOC Actuator k. Main Cam Roller

aa ac

l. Reset Spring m. Camshaft n. Main Closing Cam o. Auxiliary Switch p. Charging Motor q. Latch Check Switch r. Secondary Trip Prop Adjusting Screw s. Jackshaft t. Holding Pawl Support Arm u. Crank Pin v. Holding Pawl Adjusting Eccentric

w. Crank Arm x. Ratchet Wheel y. Pawl Lift Drive Plate z. Close Latch Arm aa. Close Latch Shaft ab. Drive Pawl ac. Closing Coil ad. Pawl Support Arm ae. Motor Cutoff Cam af. Close Bar Adjusting Screw ag. Charging Motor Drive Shaft ah. Motor Cutoff Switch

Equipment Description

01.4IB.60306

Figure 3 PowlVac ARG & ARM Series 4 Circuit Breaker Rear View

a. TOC Actuator b. Main Insulator (Wishbone) c. Upper Primary Disconnecting Device d. Support Strut e. Insulating Pole Support f. Vacuum Interrupter g. Lower Primary Disconnecting Device h. Anti-Rollout Latch

J. Wheel k. Crank Arm Roller l. Racking Crank Arm m. Racking Shaft n. Worm Gear o. Racking Drive Shaft p. Ground Connection q. Serial Number Plate

i. Frame

Equipment Description

PowlVac® ARG & ARM Series 4 Vacuum Circuit Breakers

5kV & 15kV - 1200A, 2000A, & 3000A - 25kA, 36kA, 50kA, & 63kA

Figure 4 Primary Current Closeups

01.4IB.60306

Up to 50kA

a. Lower Vacuum Interrupter Casting b. Operating Pin c. Bell Crank d. Lock Nut e. Spring Yoke f. Jackshaft Pin g. Contact Loading Spring h. Operating Pushrod

d e g

o p

63kA Only

i. Lower Vacuum Interrupter Casting j. Operating Pin k. Bell Crank l. Lock Nut m. Spring Yoke n. Contact Loading Spring o. Jackshaft Pin p. Operating Pushrod

Equipment Description

+ 49 hidden pages

Powell 05PV36ARMX-4, 15PV50ARMX-4, 15PV25ARMX-4, 15PV36ARMX-4, 15PV63ARMX-4 Instruction Bulletin

Specifications and Main Features

Frequently Asked Questions

User Manual

Contact Information

Contents

Figures

Tables

Ch 1 General Information

A. Scope

B. purpoSe

c. InStructIon BulletInS AvAIlABle electronIcAlly

D. ASSocIAteD BulletInS

Ch 2 Safety

A. SAfe Work conDItIon

B. SAfety GuIDelIneS

c. GenerAl

D. SpecIfIc

e. X-rAyS

f. SAfety lABelS

Ch 3 Equipment Description

A. GenerAl

B. the StoreD enerGy MechAnISM

1) Mechanical Description

Figure 1 PowlVac® ARG & ARM Series 4 Circuit Breaker Front View with Cover

Figure 2 PowlVac® ARG & ARM Series 4 Circuit Breaker Front View without Cover

Figure 3 PowlVac ARG & ARM Series 4 Circuit Breaker Rear View

Figure 4 Primary Current Closeups