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Содержание 15-3AFS-500

Страница 1: ...SIEMENS Type 3AFS Vacuum Circuit Breakers Instructions Installation Operation Maintenance SG 3398 Courtesy of NationalSwitchgear com ...

Страница 2: ...ion of the equipment and the hazards involved In addition he has the following qualifications a Is trained and authorized to enegize de energize clear ground and tag circuits and equipment in accordance with established safety practices b Is trained is the proper care and use of protective equip ment such as rubber gloves hard hat safety glasses or face shields flash clothing etc in accordance wit...

Страница 3: ...enoid Replacement Operational Check Warranty 13 00 13 02 13 03 14 14 3 18 3 18 4 18 4 19 5 19 19 6 20 7 7 21 7 21 8 21 21 9 21 9 21 9 22 9 22 9 24 9 9 24 10 24 12 25 12 12 26 12 27 12 30 12 30 12 31 13 NOTE The instructions contained within this manual are necessary for the safe installation maintenance and operation of this equip ment If this manual is misplaced or lost replacement manuals are av...

Страница 4: ... 3AFS Vacuum Circuit Breaker Rear View Rating Plate Typical Innterrupter Operator Assembly Section Through a Vaccum Breaker Pole Section Through a Typical Vacuum Interrupter Section Through the Typical Vacuum Breaker Operating Mechanism Closed Position Closing Springs Discharged Details of Closing Spring Charging Components Closing Springs Discharged Operating Mechanism Open Position Closing Sprin...

Страница 5: ...General Page 1 Figure 1a Type 3AFS Vacuum Circuit Breaker Front View Courtesy of NationalSwitchgear com ...

Страница 6: ...General Page 2 Figure 1b Type 3AFS Vacuum Circuit Breaker Rear View Courtesy of NationalSwitchgear com ...

Страница 7: ...ese vacuum circuit breakers depends as much on proper installation and maintenance as it does on good design and careful manufacture NOTE Damage claims must be processed within the time period specified by the carrier Siemens cannot be held responsible for shipping damage either exter nal or internal if the inspection is not made and claim forwarded within the set time limit The instructions inclu...

Страница 8: ...ontact resistance change Maintain ing a permanent record of these values for each circuit breaker should be part of the Maintenance Program c If dersired contact resistance tests can be made using a ductor d Make a permanent record of all test performed Storage NOTE If storage is necessary As Found tests are recommended prior to and after storage for comparison For storage the circuitbreakers shou...

Страница 9: ...tion for lifting alternatives 15 The breaker should now be ready for service 2 Carefully note and check rating plate 51 per Figure 2 to ensure maximum voltage continuous current interruption rating and control voltages are compatible with the system into which the breaker is to be applied A DANGER H Hazardous Voltages Associated with the ap plication of this breaker will cause death per sonal inju...

Страница 10: ...e Solenoid Volt Required range of control voltage applied to the closing solenoid which will ensure successful release of the closing spring The effective value of current required at nominal control voltage when applied to the spring release solenoid Range Amps Amps Nominal Trip Solenoid Volt Required range of control voltage applied to the tripping opening solenoid which will ensure a successful...

Страница 11: ... 0 1200 1 30 3 95 60 28 36 140 310 2000 1 30 3 95 58 15 0 60 28 36 375 170 1 30 3 95 58 15 0 3000 60 28 36 320 145 15 0 1200 60 1 30 3 95 77 37 36 320 145 15 0 2000 1 30 3 95 77 60 37 36 175 385 15 0 3000 1 30 3 95 77 60 37 36 The values of insulation level compiled in Table 1 arejeferred to sea level in accordance with ANSI C37 04 1979 consolidated standards The higher the site altitude the lower...

Страница 12: ...0 2 0 33 6 8 1 15 8 3 3 50 6 8 3 8 Table 4 Typical Closing and Tripping Solenoid Charateristics Control Voltages ANSI C37 06 Tbl Trip Coil Amps Ohms Amps Close Coil Table 6 Auxiliary Switch Ratings Ohms 48 VDC 125 VDC 250 VDC 120 VAC 60Hz 240 VAC 60 Hz 23 2 1 2 4 20 0 Characteristic Rating 121 1 0 23 5 4 Maximum Operating Voltage Continuous Current Max Making Current Max Breaking Capacity Resistiv...

Страница 13: ...s at the arc roots to the point where the molten metal vapor does not allow the dielectric to rebuild during the current zero and large magnitude currents could not be interrupted The pole supports are aluminum castings on all circuit breaker ratings except for 3000A continuous current where copper castings are used and on the 15 3AFS 500 1200A where formed steel pole supports are used The contact...

Страница 14: ...tion of the moving contact are ab sorbed by guide link 48 9 which pivots on pole support 40 and eyebolt 36 3 During closing the tripping spring and the contact pressure springs 49 are charged and latched by pawl 64 2 The closing spring of motor operated breaker is recharged im mediately after closing In the closed state the necessary contact pressure is maintained by the contact pressure spring an...

Страница 15: ...ber 33 5 Vapor Shield 34 Bellows 35 Guide 36 1 Moving contact stem 36 2 Mechanical coupling 36 Moving contact 31 2 31 1 fc 32 5 i Ul3_ j 1 31 J 33 33 5 L 36 d m 34 35 4 36 1 36 2 1L IJ i Typical for I other ratings Typical for 5 3AFS 250 b a Figure 5 Section through A Typical Vacuum Interrupter Figure 6 Section Through the Typical Vacuum Breakers Courtesy of NationalSwitchgear com ...

Страница 16: ... solenoids and auxiliary switches Signal thru indicators the breaker status open closed spring condition charged or discharged and number of operations Mode of Operation The operating mechanism is of the stored energy trip free type i e the charging of the spring is not automaticaly followed by the contacts changing position and the closing function may be overridden by a trip command at any time ...

Страница 17: ... 2 The cam disc 62 3 at the other end of the charging shaft actuates the drive lever 62 6 with the result that breaker shaft 63 is turned by lever 63 5 via the trip free coupling rod 62 8 At the same time the lever 63 1 63 5 and 63 7 fixed on the breaker shaft operate the three insulated couplers for the breaker poles Lever 63 7 changes the open close indicator over to open Lever 63 5 charges the ...

Страница 18: ... and turn it clockwise until the indicator 55 shows Closing spring CHARGED Electrically operated vacuum breakers can be operated man ually if the control supply should fail Figure 9 Operating Mechanism Open Position Closing Spring Charged Figure 10 Breaker Shaft in Open Position Closing Springs Discharged Courtesy of NationalSwitchgear com ...

Страница 19: ...lever push rod Interlock lever actuator Trip free actuator T4 5 Breaker Shaft 63 1 Lever phase C 63 5 Lever phase B 63 7 Lever phase A Tripping spring 64 2 Pawl 64 2 1 Trip latch pin 64 3 Lever 64 5 Shaft 64 63 Figure 11a Operating Mechanism Section Diagram Operating Mechanism Open Closing Springs Discharged Starreditemschangedfrom11c on Trip Operation Underlineditems changed from 11b on Closing S...

Страница 20: ...ting Mechanism Closed Closing Springs Charged Callout items changed from 11c on Closing Spring Charge Operation Figure 11c Operating Mechanism Section Diagram Mechanism Closed Closing Springs Discharged Callout items changed from 11b on Breaker Close Operation Courtesy of NationalSwitchgear com ...

Страница 21: ...21 and LS22 close to energize motor 88 LS3 doses and LS4 opens to cancel closing spring signal 52a contacts in series with the tripping solenoid close to enable a trip operation Breaker auxiliary switches 52a NO and 52b NC change state The circuit breaker closes The spring release solenoid is now blocked and can not be activated until springs are fully charged and close com mand is removed L The d...

Страница 22: ...ze the electrical tripping circuit until the vacuum breaker has tripped and open is displayed by indicator 58 Elementary Diagram The closing spring is normally automatically recharged by the motor mechanism immediately after the breaker has closed A typical elementary diagram is shown inFigure14 for DC close and trip control power Optional auxiliary switches are shown Hand crank Opening for hand c...

Страница 23: ...e is re quired They are generally intended for connection to a separate auxiliary supply DC or AC Undervoltage Release The undervoltage release is used for continuous monitoring of the tripping supply voltage If this supply voltage falls excessively the undervoltage release will provide for automatic tripping of the breaker Refer to Figures 15 and 16 The indirect release provides for the conversio...

Страница 24: ...f the striker pin 23 and its operating spring 31 which is costly located inside the striker pin 23 When the spring is compressed the striker pin is held by a latch 25 whose sloping face is forced against the appropriately shaped striker pin 23 by spring 27 The other end of the latch 25 is supported by a partly milled lock ing pin 21 Fig 16a pivoted in the cover sheets of the magnet armature 9 The ...

Страница 25: ...ther severe ambient conditions and or frequent switching operations the following inspection checks should be more fre quently applied than for normal maintenance 5 6 7 8 Hand Tools Recommended The 3AFS breakers employ both English and Metric fasteners Metric fasteners are confined to the circuit breaker subassembly The supporting drawout vehicle uses English sizes The following tool list has been...

Страница 26: ...years or within the operations interval indicated in Table 7 whichever occurs first 3000 10000 10000 10000 3000 Overhaul Within the operations interval indicated in Table 7 the circuit breaker should be maintained in accordance with the following recommendations and the following components replaced Vacuum Interrupters Closing Solenoid 52SRC Opening Solenoid 52T Trip Free Drive Bar Mechanism Lubri...

Страница 27: ...e cover Lubricate all the appropiate points starting at the top left and working through systematically Parts that are not rigidly fixed e g articulated joints should be moved slightly to and fro to let the oil penetrate Following this operate the breaker several times to test it Pivots and Articulated Joints Auxiliary Switches etc Tectyl 910 Valvoline Oil Co Division of Ashland Oil Inc Ashland Dr...

Страница 28: ...pplicable Curve a Function of Breaker Rating Contact Erosion Vacuum interrupters should be checked periodically for con tact shortening which is normally associated with erosion of con tact material during high fault current interruptions Contact shortening or erosion is normally not expected to be significant until the number of operations indicated for contact life is ap proached When the number...

Страница 29: ... be necessary on higher in terrupting capacity circuit breakers which are subjected to repeated high fault current interruptions These procedures should be used at least each time a high interrupting capability circuit breaker interrupter experiences about 25 of expected life under full high fault current interruptions The type 5 3AFS 350 and type 15 3AFS 1000 circuit breakers shouldbe checked at ...

Страница 30: ...away from breaker during test voltage ap plication After test ground ends and middle of vacuum tube to remove static charge A CAUTION h Erroneous test results may occur Vacuum in terrupters can emit X Radiation causing per sonal injury 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 interrupter is...

Страница 31: ...dous voltages and high speed mec hanical parts can cause death personal in jury and property damage Before starting any work breaker should be isolated short circuited and grounded Con trol power should be disconnected an breaker closed and opened by hand until both springs have been discharged 2 1 Inspect all silver plated connection surfaces for clean liness Clean only with a cloth and solvent D...

Страница 32: ...Interrupter Operator Vacuum Interrupter Page 28 Figure 21 Vacuum Tube Replacement Illustration Courtesy of NationalSwitchgear com ...

Страница 33: ...iated with struts 2 8 2 9 Tighten interrupter fastening bolt B on the upper pole support 20 holding the interrupter firmly by its upper insulator and operate levers 48 6 by hand to see whether the movable contact moves freely If any bind ing or lack of freedom is noted loosen bolt B and ad just the interrupter in pole support by turning and mov ing it slightly 2 10 Press centering ring segments fi...

Страница 34: ...ou fail to achieve the listed results carefully repeat the entire procedure making certain of your measurements 3 8 If after confirming your measurements you find the stroke not in agreement with the values given above an adjustment can be made by adjusting the eyebolt 48 6 at the end of the insulated coupler 48 NOTE Do not adjust eyebolt 36 3 on interrupter Excessive stroke is corrected by turnin...

Страница 35: ...e item and any affected part of the product s Purchaser shall assume all responsibility and expense for removal reinstalla tion and freight in connection with the foregoing remedies The same obligations and conditions shall extend to replacement parts furnished by Siemens hereunder Siemens shall have the right of disposal of parts replaced by it Any separately listed item of the product s which is...

Страница 36: ...Siemens Energy Automation Inc P O Box 29503 Raleigh NC 27626 919 365 6660 SIEMENS A 4 SG3398 1M 4 91 PRINTED IN U S A Courtesy of NationalSwitchgear com ...

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