Related Manuals for Powell Power/Vac ML-17
Summary of Contents for Powell Power/Vac ML-17
- Page 1 01.4IB.50100 Power/Vac® ML-17 Mechanism For use with all Power/Vac® Electrical Ground and Test Devices Powered by Safety ®...
- Page 2 Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim Contact Information Powell Electrical Systems, Inc. www.powellind.com info@powellind.com Service Division PO Box 12818 Houston, Texas 77217-2818 Tel: 713.944.6900 Fax: 713.948.4569 Powered by Safety ®...
- Page 3 01.4IB.50100 Signal Words Qualified Person As stated in ANSI Z535.4-2007, the signal word is For the purposes of this manual, a qualified a word that calls attention to the safety sign and person, as stated in NFPA 70E®, is one who has designates a degree or level of hazard seriousness.
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Page 4: Table Of Contents
01.4IB.50100 Contents Ch 1 General Information ....................1 A. S ................................2 cope B. p ................................2 urpoSe c. I ....................3 nStructIon ulletInS vAIlABle lectronIcAlly Ch 2 Safety ........................4 A. S ............................4 ondItIon B. S ...............................4 Afety uIdelIneS c. G ................................5 enerAl d. S ................................5 pecIfIc e. - Page 5 Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim Contents Ch 6 Electrical Checks ....................22 A. H ............................22 otentIAl 1) Primary Circuit ..................................22 2) Secondary Circuit ..................................22 3) Primary Circuit Resistance ..............................22 4) Vacuum Interrupter Integrity Test .............................23 Ch 7 Maintenance ......................25 A.
- Page 6 01.4IB.50100 Figures Figure 1 Typical Schematic for ML-17 Mechanism, Models -4 ........9 Figure 2 Typical Schematic for ML-17 Mechanism, Models -4 (continued) ....10 Figure 3 Toggle Linkage Positions of ML-17 Mechanism View from Rear ....11 Figure 4 Lifting Holes for Overhead Crane ..............13 Figure 5 Closing Spring Gag Lock ................16 Figure 6...
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Page 7: Ch 1 General Information
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. -
Page 8: S Cope
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim A. S This instruction bulletin provides: cope The information in this instruction bulletin 1. Safety guidelines describes the following Power/Vac® Electrical 2. General descriptions of the operation and Ground and Test Devices: maintenance of the ground and test device •... -
Page 9: I Nstruction B Ulletins A Vailable E Lectronically
NOTICE Changes to the instruction bulletin may be implemented at any time and without notice. Go to www.powellind.com to ensure use of the current instruction bulletin for the Powell equipment. For more information visit www.powellind.com. To contact the Powell Service Division call 1.800.480.7273 or 713.944.6900, or email... -
Page 10: Ch 2 Safety
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim Ch 2 Safety 6. Where the possibility of induced voltages or stored electrical energy exists, ground A. S the phase conductors or circuit parts ondItIon before touching them. Where it could be The information in Section A is quoted from reasonably anticipated that the conductors NFPA 70E 2012 - Article 120, 120.1 Establishing an... -
Page 11: G Eneral
01.4IB.50100 c. G 2. Do not attempt to service the device while it enerAl is installed in a switchgear compartment or 1. Only supervised and qualified personnel on a lift truck. For service, the device must trained in the usage, installation, operation, be located either on the floor or on a sturdy, and maintenance of the ground and test level work bench, and blocked from rolling. -
Page 12: Ch 3 Equipment Description
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim Ch 3 Equipment Description Closing and opening operations are controlled electrically by a remote control cable attached A. G to the front of the ground and test device. For enerAl maintenance and checkout, the closing spring The Power/Vac®... -
Page 13: O Peration
01.4IB.50100 c. o flywheel and attempts to discharge, the perAtIon close roller (Figure 1, #3) is blocked by the 1) Close Spring Charging close latch (Figure 1, #4) and held until a closing operation is required. Additionally, Figures 1 & 2 show the mechanism as the close spring goes over center, the expanded schematically with the primary switch operator (Figure 2, #44) is spring... -
Page 14: Closing Operation
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim 2) Closing Operation (Figure 1, #17) can move up past the close toggle without disturbing it as they are By either energizing the close solenoid slotted to accommodate a close spring or depressing the manual close button, charged, ground and test device closed, the the close latch (Figure 1, #4) is rotated... -
Page 15: Figure 1 Typical Schematic For Ml-17 Mechanism, Models -4
01.4IB.50100 Figure 1 Typical Schematic for ML-17 Mechanism, Models -4 1 2 3 4 5 1. Rear Flywheel Section 11. Wind Hub 2. Front Flywheel Section 12. Pawl Disengagement Cam Surface - On Frame 3. Close Roller 13. Pull Rod 4. -
Page 16: Figure 2 Typical Schematic For Ml-17 Mechanism, Models -4 (Continued)
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim Figure 2 Typical Schematic for ML-17 Mechanism, Models -4 (continued) 21. Link from Output Crank to Close Toggle 41. Rod 22. Output Crank 42. Spring Charge-Discharge Indicator Flag 23. Pole 1 Bell Cranks 43. -
Page 17: Figure 3 Toggle Linkage Positions Of Ml-17 Mechanism View From Rear
01.4IB.50100 Figure 3 Toggle Linkage Positions of ML-17 Mechanism View from Rear a) Breaker Open-Close Spring Charged b) Breaker Closed-Close Spring Discharged c) Breaker Closed-Close Spring Charged d) Breaker Open-Close Spring Discharged 6. Slotted Link 1. Output Crank 7. Transfer Crank 2. -
Page 18: Trip Free Operation
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim 4) Trip Free Operation 2) Negative Trip Interlock The linkage (Figure 1, #19 & 20 & The function of the negative trip interlock Figure 2, #21) is mechanically trip free in is to disengage the trip latch from the trip any location on the closing stroke. -
Page 19: Ch 4 Installation
Powell representative. device mechanism housing (Figure 4). The ground and test device is enclosed in Figure 4 Lifting Holes for Overhead Crane a carton used for shipment. -
Page 20: Shipping Osition
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim d. S 1. Equipment designed for indoor installation HIppInG oSItIon must be stored indoors in a climate The ground and test device has been shipped controlled environment to prevent in an open and discharged position. -
Page 21: Ch 5 Mechanical Checks And Adjustments
01.4IB.50100 Ch 5 Mechanical Checks and Adjustments NOTICE A. G enerAl The nameplate containing the ground and Checking the mechanical adjustments may test device rating and serial information is be performed in any order. However, the located on the removable front cover. Many adjustments associated with the stroke of maintenance and repair procedures require removal of the front cover. -
Page 22: Figure 5 Closing Spring Gag Lock
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim Figure 5 Closing Spring Gag Lock CAUTION Check that the closing spring is fully charged with the close roller resting against the close latch. 2. Insert the close spring blocking pin (Figure 5, b) by carefully removing it from its storage hole, rotating the interlock lever and inserting it in the blocking hole. -
Page 23: P Ull R Od A Djustment
01.4IB.50100 c. p djuStMent CAUTION The pull rod (Figure 1, #13) is a turnbuckle, with a right-hand thread at the crank and a If the pull rod is too short, i.e., slotted link is left-hand thread at the flywheel connection. too tight against the pin in the closed toggle, Slow close the mechanism as described in the pin may be bent and require replacement. -
Page 24: O Vertravel A Djusting B Olts
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim e. o Wipe and gap are related in such a way vertrAvel djuStInG oltS that decreasing the wipe increases the gap Six adjustable bolts (Figure 7, l) are threaded and increasing the wipe decreases the gap. -
Page 25: Checking
01.4IB.50100 Figure 8 Wipe Gauge frame, draw a line on the tape to indicate the position when the ground and test device is closed. Leave the tape in place. Then in step f draw another Vacuum Interrupter line on the tape when the ground and Operating Rod test device is opened. -
Page 26: Adjustment
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim 3) Adjustment e. Decrease the wipe (and increase the gap a like amount by turning the If wipe and gap adjustments are deemed to operating rod down (clockwise looking be necessary in the field for breakers using from the top) or increase the wipe 45A, 46A, 47A, 48A &... -
Page 27: P Rimary C Ontact E Rosion I Ndication
01.4IB.50100 G. p rIMAry ontAct roSIon ndIcAtIon In the closed position, the erosion indicator disc (Figure 7, g) below the operating rod is aligned with a reference arm (Figure 7, e) on new interrupters. With the ground and test device in the closed position, the indicator disc after in service fault interruptions will move upward from alignment with the reference point due to... -
Page 28: Ch 6 Electrical Checks
Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim Ch 6 Electrical Checks Note: Do not exceed the test voltage indicated for applicable ground and A. H test device voltage rating. If the test otentIAl should experience a failure, STOP, If high potential tests to check the integrity turn off the test set and discharge the of the primary insulation is required, the AC... -
Page 29: Vacuum Interrupter Integrity Test
01.4IB.50100 4) Vacuum Interrupter Integrity Test A vacuum integrity test of the interrupter is required to ensure that no loss of vacuum has occurred. The vacuum integrity test is NOTICE performed using an AC hi-potential tester. This test of the vacuum interrupter will Use of DC hipot is not recommended, but can determine its internal dielectric condition be used for quick field checks only. - Page 30 Power/Vac® Electrical Ground and Test Devices 01.4IB.50100 Equipped with ML-17 Mechansim CAUTION Many DC high potential machines are halfwave rectifiers. This type of hipot tester must not be used to test vacuum interrupters. The capacitance of the Power/Vac bottles is very low and the leakage in the rectifier and its DC voltage measuring equipment is such that the pulse from the halfwave rectifier...
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Page 31: Ch 7 Maintenance
01.4IB.50100 Ch 7 Maintenance Electrical primary contact surfaces also require periodic lubrication to inhibit oxidation and A. r minimize friction. At each inspection and ecoMMended AIntenAnce maintenance interval, do the following: The following operations should be performed 1. Metal contact surfaces such as the movable at each maintenance check: contact rod of the interrupter should be •... -
Page 32: Ch 8 Recommended Renewal Parts And Replacement Procedures
Equipped with ML-17 Mechansim Ch 8 Recommended Renewal Parts and Replacement Procedures A. o rderInG nStructIonS 1. Order renewal parts from Powell at www.powellind.com or call 1.800.480.7273. 2. Always specify complete nameplate information, including: • Ground and Test Device Type •... - Page 33 Ground and Test Devices July 2014 Powered by Safety ® Powell Electrical Systems, Inc. Tel: 713.944.6900 • Fax: 713.948.4569 Service Division - Houston www.powellind.com PO Box 12818 • Houston, TX • 77217 info@powellind.com ©2006 Powell Industries, Inc. • All rights reserved.
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