Related Manuals for Siemens SGIM-3268H
Summary of Contents for Siemens SGIM-3268H
- Page 1 Instruction Installation Operation Maintenance SGIM-3268H Power Transmission and Distribution, Inc. Vacuum Circuit Breakers 5kV and 15kV, Type GMI Courtesy of NationalSwitchgear.com...
- Page 2 Siemens Power Transmission & Distribution Inc. The warranty contained in the contract between the parties is the sole warranty of Siemens Power Transmission & Distribution Inc. Any statements contained herein do not create new warranties or modify the existing warranty.
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Page 3: Table Of Contents
5kV and 15kV Vacuum Circuit Breakers Table of Contents Introduction and Safety ......2 Undervoltage Release ......20 Introduction . -
Page 4: Introduction And Safety
• Training and authorization to energize, de-energize, Contact regional service centers, sales offices or the factory clear, ground and tag circuits and equipment in for details, or telephone Siemens Field Service at 1-800- accordance with established safety practices. 347-6659 (919-365-2200 outside the U.S.) •... -
Page 5: Receiving, Handling And Storage
The storage environment must be clean, dry and free of such items as construction dust, corrosive 3. Notify Siemens Sales office immediately of any atmosphere, mechanical abuse and rapid temperature vari- shipment damage. -
Page 6: Installation Checks And Initial Functional Tests
Installation Checks and Initial Functional Tests Introduction This section provides a description of the inspections, checks and tests to be performed on the circuit breaker prior to operation in the metal-clad switchgear. Inspections, Checks and Tests without Control Power Vacuum circuit breakers are normally shipped with their primary contacts open and their springs discharged. -
Page 7: Removal From Lower Cell
Installation Checks and Initial Functional Tests Removal from Lower Cell in Indoor (if not on raised pad) and Shelter-Clad Outdoor Switchgear - 1. Open the circuit breaker. 2. If the circuit breaker is in the Connect position, insert the racking crank on the racking screw on the front of the breaker cell, and push in. - Page 8 9. Remove the circuit breaker from the two extension rails using the approved Siemens breaker lifting device or lifting sling. 10. Lift the two extension rails and withdraw them from the switchgear.
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Page 9: Removal In Outdoor Non-Walk In Enclosures
Installation Checks and Initial Functional Tests Removal from Upper and Lower Cell in Outdoor Non- Walk In Enclosures or for Indoor Switchgear Installed on a Raised Pad - Because the floor level in non-walk in outdoor enclosures is approximately 6 inches above grade (foundation) level, the lower circuit breaker in either a one- high or two-high section of switchgear must be removed using the preceding procedure for upper circuit breaker... -
Page 10: Final Mechanical Inspections Without Control Power
3. Coat movable primary contact fingers (Figure 9) and the secondary disconnect contacts (Figure 9 and 22) with a light film of Siemens Contact Lubricant No. 15-172- 791-233). 4. The GMI vacuum circuit breaker is ready for installation into its assigned cubicle of the metal-clad switchgear. -
Page 11: Interrupter/Operator Description
Installation Checks and Initial Functional Tests Introduction The Type GMI vacuum circuit breaker is of drawout construction designed for use in medium voltage, metal- clad switchgear. The GMI circuit breaker conforms to the requirements of ANSI standards C37.20.2, C37.04, C37.06, C37.09 and C37.010. -
Page 12: Primary Disconnects
Interrupter/Operator Description Primary Disconnects Figure 12 is a side view of the circuit breaker with side phase barriers removed to show details of the primary disconnects. Each circuit breaker has three upper and three lower primary disconnects. Upper primary disconnects are connected to the stationary contacts of the vacuum inter- rupters, and the lower primary disconnects to the movable contacts. -
Page 13: Modes Of Operation - Mid-1991 And After
Interrupter/Operator Description Modes of Operation - Mid-1991 and After Pages 11-13 describe the operation of the mechanism used beginning in approximately mid-1991. This mechanism can be identified by observing the close latch above the spring charging motor on the left side of the circuit breaker. -
Page 14: Closing Mode
Interrupter/Operator Description manual charging link (48). The upper pawl (24-2) drives the ratchet plate counterclockwise during manual charging, and the lower pawl (24-1) becomes the holding device. At the beginning of the charging cycle, ratchet pin (16) is at the 6 o’clock position. The ratchet pin is connected to the ratchet wheel. -
Page 15: Opening Mode
Interrupter/Operator Description Opening Mode Modes of Operation - Up to Mid-1991 Opening or tripping the vacuum interrupter contacts is Pages 13-15 describe the operation of the mechanism accomplished by rotation of the trip shaft (79). Rotation used from 1989 until approximately mid-1991 may be produced either electrically, by energizing the trip This mechanism can be identified by observing the close solenoid (266) (Figure 15a), or manually by pressing the... -
Page 16: Closing Mode
Interrupter/Operator Description At the beginning of the charging cycle, ratchet pin (16) is at the 6 o’clock position. The ratchet pin is connected to the ratchet wheel. Upon being advanced by ratchet action to the 12 o’clock position, this pin engages the drive arms (8) which are keyed to the main cam shaft. -
Page 17: Opening Mode
Interrupter/Operator Description Opening Mode Opening or tripping the vacuum interrupter contacts is accomplished by rotation of the trip shaft (79). Rotation may be produced either electrically, by energizing the trip solenoid (266) (Figure 15b), or manually by pressing the trip button. Energizing the trip solenoid causes the upper arm of the trip actuator (152) to rotate counterclockwise. -
Page 18: Closing And Opening Springs
Interrupter/Operator Description Closing and Opening Springs The stored energy assembly consists of two dual closing springs and a single opening spring. Figure 19 shows the three springs and their linkages to the charging devices. The two closing springs are connected to crank arms mounted on the rotating main cam shaft. -
Page 19: Manual Spring Charging
Interrupter/Operator Description Damper (used with type VS-15050 vacuum interrupters) (refer to Figures 19a and 37a) The cylindrical body of the damper has outer threads, for mating with a threaded adapter which is mounted in the upper portion of the circuit breaker frame. The body of the damper is inserted into a cylinder which extends from the damper down to the connection on the circuit breaker jack shaft in the lower portion of the operating mechanism. -
Page 20: Auxiliary Switch
Interrupter/Operator Description by the close solenoid can occur during each application of the close command. The circuit breaker must be tripped, the springs recharged and the closing signal removed (inter- rupted) before the close solenoid can be energized the second time. When the trip solenoid is energized, it allows rotation of the jack shaft by the tripping spring. -
Page 21: Toc (Truck Operated Cell) Switch
Interrupter/Operator Description the auxiliary switch in both positions (Figure 26). Up to 24 stages may be provided. TOC (Truck Operated Cell) Switch Figure 26 shows the optional TOC cell switch. This switch is operated by the circuit breaker as it is racked into the Connect position. -
Page 22: Standard Schematic Diagrams
Interrupter/Operator Description springs unless the breaker is either in the Test of rectifier and resistor. The rectifier allows the capacitor to Connected position, or is out of the compartment. assume a charge approximating the peak voltage of the AC tripping supply voltage. The series resistor limits the Standard Schematic Diagrams magnitude of charge current flowing into the capacitor. - Page 23 Interrupter/Operator Description Figure 28a: DC Control Power. Figure 28b: AC and DC Control Power. Symbols 52/b *Aux. Switch, Closed when Brk. is Open *Motor Cutoff Switch CS/C *Control Switch Close *Anti-Pump Relay *Spring Charged Switch CS/T *Control Switch Trip Typical *Opening Solenoid (Trip) *Checks Trip Latch Reset and *Red Indicating Lamp...
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Page 24: Interlocks
Interrupter/Operator Description A spring loaded latch arm (9) rises to engage the latch Trip-Free Interlock face, which is an integral feature of the cylindrical Figure 30 shows the devices providing the trip-free inter- assembly. The latch arm (9) is held in this position by the lock function. -
Page 25: Ground Disconnect
Interrupter/Operator Description Ground Disconnect Figure 30 shows the ground disconnect contact mounted at the bottom of the circuit breaker. The spring loaded fingers of the disconnect contact engage the ground bar (Figure 31) at the bottom of the switchgear assembly. The ground bar is to the right of the racking mechanism, shown at the bottom center of the switchgear. -
Page 26: Maintenance
• Hex Keys: 3/16 and 1/4 in. Regardless of the length of the maintenance and lubrica- • Screwdrivers: 0.032 x 1/4 in. wide and tion interval, Siemens recommends that circuit breakers 0.55 x 7/16 in. wide should be inspected and exercised annually. -
Page 27: Recommended Maintenance And Lubrication
Should further information be desired or should particular problems arise which are not covered sufficiently for the Purchaser’s purposes, the matter should be referred to the local Siemens sales office. Removal from Switchgear Prior to performing any inspection or maintenance checks or tests, the circuit breaker must be removed from the switchgear. -
Page 28: Checks Of The Primary Power Path
(reference part number 15-172-816-058). clean old lubricant from primary disconnects, and apply In addition to lubricating the stored energy operating mech- Siemens contact lubricant (reference 15-172-791-233) in a anism, use Anderol 732 to lubricate both the OD of the very thin layer. -
Page 29: Fastener Check
Maintenance Fastener Check Inspect all fasteners for tightness. Both lock-nuts and retaining rings are used. Replace any fasteners that appear to have been frequently removed and replaced. Manual Spring Charging and Contact Erosion Checks Perform the Manual Spring Charging Check contained in the section describing the Installation Check and Initial Functional Tests. -
Page 30: Damper Assembly Check
Maintenance Damper Assembly Check (for circuit breakers equipped with all vacuum interrupters except type VS-15050) GMI circuit breakers contain a viscous damper assembly, shown in Figure 37a, and described in some detail on page 16, and in Figure 19a. While performing the manual spring charging check, a simple check of the damper mounting yoke, pin, retaining rings, and the nut for tightness should be completed. -
Page 31: Automatic Spring Charging Check
Maintenance WARNING Hazardous voltages and high-speed Checks of the Spring Charging Motor mechanical parts. No additional checks of the spring charging motor are Can cause death, severe personal injury, or necessary. Once every 10,000 operations, the motor property damage. brushes need replacement (reference kit 18-658-612-886). Follow safe procedures, exclude unnecessary Use the operation counter as the basis for establishing the personnel and use safety barriers. -
Page 32: High Potential Test Voltages
Maintenance Table 3 – High Potential Test Voltages Vacuum Integrity Test Procedure E E q q u u i i p p m m e e n n t t 1. Observe safety precautions listed in the danger and k k V V R R a a t t i i n n g g M M a a x x A A C C R R M M S S M M a a x x D D C C A A v v g g warning advisories. -
Page 33: Overhaul
Overhaul Replacement at Overhaul Introduction The following components are replaced during an overhaul For following procedures along with the troubleshooting of the circuit breaker, when required: charts at the end of this section, provide maintenance • Vacuum interrupters as determined by vacuum personnel with a guide to identifying and correcting integrity test, contact erosion, or after 30,000 possible malfunctions of the GMI vacuum circuit breaker. -
Page 34: Replacement Of Opening Spring
Overhaul Re-tighten by turning the support bolts clockwise until the support bolt bushings firmly butt up against the support bolt attachment bracket and the cross arm support shaft. Replacement of Opening Spring The opening spring may be removed and replaced without the need to use a spring keeper or compression aid. -
Page 35: Replacement Of The Auxiliary Switch
Overhaul Replacement of the Auxiliary Switch Figure 41 shows the auxiliary switch and its key mounting components. Two mounting screws hold the switch to the mounting bracket. First remove the quick disconnect terminals after marking their position. The screw, washer and nut connecting the switch’s operating lever to the operating shaft is removed, and then the two mounting screws. -
Page 36: Replacement Of Ls3 - Up To Mid-1991
Overhaul The trip latch reset check switch (LS3) is mounted on the trip shaft actuator stop plate, as shown in Figure 43a. To replace this switch, the trip shaft actuator must be removed by backing out two #10-32 hex socket screws, and then removing two 3/8”... -
Page 37: Replacement Of Spring Charging Motor
Overhaul Replacement of Damper Assembly (for circuit breakers equipped with type VS-15050 vacuum interrupters) Damper replacement will require the removal of a pin which ties the damper mounting adapter to the circuit breaker frame. While disassembling the pin, carefully note the position of all spacers so that the adapter will be correctly centered between the vertical circuit breaker frame members upon reassembly. -
Page 38: Replacement Of Vacuum Interrupters
Overhaul Replacement of Vacuum Interrupters vacuum interrupter type, and other factors. It is The following procedures are for the removal and replace- suggested that photos be taken of the circuit breaker ment of the vacuum interrupters. prior to the start of disassembly to aid in correctly reassembling the circuit breaker. -
Page 39: Vacuum Interrupter Replacement
Overhaul loosen and remove hex bolt joining the interrupter primary stab support. stationary contact to the bus extensions and stab Using a 9/16 socket and extension, remove four 3/8 support. Remove primary extensions and save. hex bolts fastening the upper primary stab support to the red post insulator. - Page 40 Overhaul 13. Slip the flexible shunt clamp over the movable contact Replace upper primary stab support with primary bus stem of the interrupter. Replace clamp hardware, extensions. Fasten with four 3/8” hex bolts to the bolt(s), washer(s), and nut(s). Raise clamp until it bears primary insulator.
- Page 41 Overhaul Align vacuum interrupter stationary contact. Insert M16 M12 thread for VS15050. hex bolt through lock washer, washer, upper stab M12 thread for VS15050. support and primary bus extensions. Manually engage Thread by hand until fully and firmly seated. bolt into the tube by applying hand torque only. 15.4.
- Page 42 Overhaul The adjustment requires the insulating pushrod length were prior to disassembly. Refer to the notes and be varied by turning the threaded pushrod end into or photos taken during disassembly, section 2. out of the pin coupling the pushrod to the breaker jack 17.5.
- Page 43 Overhaul Table 6 – Recommended Tools O O p p e e n n E E n n d d o o r r B B o o x x E E n n d d W W r r e e n n c c h h e e s s : : 7/16, 1/2, 9/16, 5/8, 11/16 S S o o c c k k e e t t W W r r e e n n c c h h e e s s : : (1/2”...
- Page 44 Overhaul Figure 48: VS12015, VS25002 and VS17006, 1200 and Figure 50: VS10006 2000A. 2000A. Position of Torque Wrench to Avoid Undue Stressing of Moving Terminal Vacuum Interrupter Terminal Holding Wrench Terminal Clamp Torque Wrench P = Direction of Force Figure 51: Interrupter Clamp Fastening Procedure. Figure 49: VS10028 2000 and 3000A.
- Page 45 Overhaul Figure 52: Gaging Procedure and Stroke Adjustment. Figure 54: VS-15050 2000A and 3000A with sperate phase barriers. Figure 53: VS-15050 1200A. Socket Head POLETOP 24mm BOLT Capscrews socket head capscrew Section B-B Socket Head Capscrews Hex head cascrews hold shunts to Pole Bottom x washer Section A-A...
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Page 46: Periodic Maintenance And Lubrication Tasks
Overhaul Periodic Maintenance and Lubrication Tasks S S u u b b - - A A s s s s e e m m b b l l y y I I t t e e m m I I n n s s p p e e c c t t F F o o r r Primary Power Path Vacuum Interrupter 1. -
Page 47: Troubleshooting
Overhaul Troubleshooting P P r r o o b b l l e e m m S S y y m m p p t t o o m m s s P P o o s s s s i i b b l l e e C C a a u u s s e e s s a a n n d d R R e e m m e e d d i i e e s s Breaker fails to close Closing springs will not automatically 1. - Page 48 Overhaul Troubleshooting (continued) P P r r o o b b l l e e m m S S y y m m p p t t o o m m s s P P o o s s s s i i b b l l e e C C a a u u s s e e s s a a n n d d R R e e m m e e d d i i e e s s Nuisance or false close Electrical problem 1.
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Page 49: Appendix
Appendix Table A-1A – Type GMI Circuit Breaker Ratings (Historic “Constant MVA” Rating Basis) These ratings are in accordance with the following standards: ANSI C37.04-1979 Standard Rating Structure for AC High-Voltage Circuit Breaker Rated on a Symmetrical Current Basis ANSI C37.06-1987 AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis—Preferred Ratings and Related Required Capabilities ANSI C37.09-1979... - Page 50 Appendix Table A-1B – Type GMI Circuit Breaker Ratings (New ”Constant kA” Rating Basis) These ratings are in accordance with the following standards: ANSI C37.04-1999 Standard Rating Structure for AC High-Voltage Circuit Breakers ANSI C37.06-2000 AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis—Preferred Ratings and Related Required Capabilities ANSI C37.09-1999 Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis...
- Page 51 Appendix Table A-2 – 5kV, 7.2kV and 15kV Type GMI Circuit Breaker Control Data Typical Spring Release (Close Coil), Trip Coil and Spring Charging Motor Characteristics Control Voltages, ANSI C37.06 Table 10 S S p p r r i i n n g g C C h h a a r r g g i i n n g g M M o o t t o o r r Close Coil T T r r i i p p C C o o i i l l R R a a n n g g e e...
- Page 52 Siemens Power SGIM-3268H © 2006 Siemens Power Transmission & Transmission & Distribution Inc. Distribution, Inc. All rights reserved. Subject to 7000 Siemens Road change without notice. Wendell, NC 27591 USA 1-800-347-6659 www.usa.siemens.com/energy Courtesy of NationalSwitchgear.com...