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1.5.3 Replacement of operating coil

Refer Fig.9 to 12, (page no 58 to 59) indicates the mounting arrangement for

closing coils and the tripping coils.

1.5.4. Replacement of micro-switch

Refer fig. 16 & 17, (page no. 62) indicates the

mounting arrangement for micro-switch.

1.5.5 Replacement of motor

Refer fig.14 & 15,(page no. 60 & 61) indicates the mounting

arrangement for motor.

1.5.6 Replacement of operating mechanism

The operating mechanism shall be replaced in the following manner.

a. Disconnect the linkage of the operating mechanism to the main shaft

b. Disconnect the electrical connection.

c. Loosen screws that fix the operating mechanisminside the cabinet.

d. Take out the operating mechanism and fix new one.

e. Reconnect the electrical connections and the linkage of the main shaft. After fixing

the operating mechanism the following check shall be carried out.

f. Charge the closing spring.

g. Close the breaker.

h. If required then adjust the micro-switch for proper operation.

i. Check the breakers with the auxiliary supply connect while charging at minimum

operating voltage of the motor.

j. Take few operations for the new mechanism.

k. Seal various lock nuts of various settings with red paint.

1.5.7 Recommended spares parts

The following spares shall be kept to take care of any contingency

Sr. No Name of parts Part No.

1 Spring charging motor 15032

2 Tripping/closing coils 15030(A,B)

3 Micro-switches 15033

4 Auxiliary switches 15027

5 Shock absorber 15007

6 Operating box assembly 15012

7 Opening transmission lever 15010

8 Closing transmission lever 15011

9 Operating Mechanism 15000A

Содержание OVB-SDB

Страница 1: ...Outdoor Vacuum Circuit Breaker Type OVB SDB Instruction for Storage Installation Service and Maintenance ...

Страница 2: ...ith operating device PART B Instructions for Erection Operation Maintenance 1 0 General 2 0 Design 3 0 Function 4 0 Erection 5 0 Commissioning 6 0 Maintenance PART C Operating Mechanism Working Principle and Maintenance 1 0 Breakers with spring charged mechanism 2 0 Breakers with magnetic actuator mechanism 3 0 Breaker pole OVB SDB Failure Report List Of Drawings Diagrams and Legends 4 5 7 9 11 13...

Страница 3: ...g during transportation 1 3 Lifting 1 4 Lifting the breaker out of the case 2 0 STORAGE PRIOR TO ERECTION 2 1 General 2 1 1 Receipt 2 2 Operating Mechanism 2 3 Circuit breakers 2 4 Spare parts 3 0 SAFETY PROVISIONS AND ASSEMBLY INSTRUCTIONS FOR CIRCUIT BREAKERS WITH OPERATING DEVICE 3 1 Warning texts 3 3 Unpacking 3 2 Safety Precaution ...

Страница 4: ...des and gross weight on one short side Case number and gross weight are painted in black directly on the case Other information is written on a plywood disc label which is max 620 x 480 mm with a standard text height of 20 mm If not otherwise specified by the customer This plywood disk label is fastened on two sides of the case In addition to the above the cases are marked with the following symbo...

Страница 5: ...ed Breaker should not be stacked one over the other 1 3 Lifting Before lifting the case observe the information on it such as symbol weight etc The cases shall be lifted by a lifting device equipped with forks or slings see Fig C If a crane is used slings shall be used The units must not be rolled or dropped Fig C Lifting the case 1 4 Lifting the breaker out of the case Lifting the breakers out of...

Страница 6: ...presence of white rust is no reason for rejection of goods On arrival each unit should be checked in the following way Delivery is in accordance with order and delivery documents Any damage in delivery and material loss In cases where damage is detected or suspected the units should be opened and damages must be photographed Both damage and shortages should be reported In general all material shou...

Страница 7: ...ere they are well protected from damage The unit shall be prevented from standing in water The breakers which are stored outdoors should be covered with at least a tarpaulin The tarpaulin should not be placed directly onto the galvanized surface An air gap should be left to prevent condensation The minimum allowed ambient tem perature for the Outdoor Vacuum Circuit Breaker is 30 C 2 4 Spare parts ...

Страница 8: ...s a risk situation that can lead to death or serious personal injury if not avoided Caution indicates a risk situation that can lead to small or moderate damage Note is used when there is danger that can lead to equipment damage only Important indicates an operation or a suggestion for handling DANGER Warning Caution Note Important 3 2 Unpacking Place the case horizontally on a flat surface before...

Страница 9: ...ting device 4 Risk in operating mechanism and link system The spring operated device has energy stored in the opening spring when it is in charged condition The device can be activated by heavy vibrations or unintentional slight touch on mechanical latch parts 5 Work on pressurized porcelain Insulators Normally the work pressure is up to 1 2 bar absolute Damages in the porcelain can cause risk of ...

Страница 10: ...er 2 0 Design 2 1 Breaker Pole 3 0 Function 3 1 Switching operations 3 2 Closing operation A Spring operated mechanism B Magnetic Actuator 3 3 Opening operation A Spring operated mechanism B Magnetic Actuator 4 0 Erection 4 1 General 4 1 1 Preparations 4 2 Erection procedure 4 3 High voltage connection 4 4 Low voltage connections 4 5 Earthing ...

Страница 11: ... position B Circuit breaker in close position 5 5 Checking the soundness of vacuums interrupters 5 6 Space heaters 5 7 Final commissioning check 5 8 Starting conditions 5 9 Function test 5 10 Trial switching operations 5 11 Anti pumping device 6 0 Maintenance 6 1 Caution 6 2 General 6 3 Lubrication 6 4 Maintenance Schedule 6 5 General Inspection of the circuit breaker ...

Страница 12: ...15 20 25 Outdoor Vacuum Circuit Breaker Type SDB Rated voltage 15kV Rated normal current 2000A Rated breaking capacity 25kA 18 for 18 4 kA 20 for 20kA 25 for 25kA 12 for 12kV 15 for 15kV 08 for 800 Amp 12 for 1250 Amp 16 for 1600 Amp 20 for 2000 Amp ...

Страница 13: ...00 Amps Short circuit breaking current 46 50 66 kA Operating sequence 0 0 3S CO 3 Min CO Weight 390 kg Auxiliary voltage Closing coil Voltage of closing coil Operating coil Voltage of opening coil Motor if applicable Voltage spring charging motor Instruction Manual 1VDU28004 YN 1 3 Weight of the Circuit Breaker The weight of a complete circuit breaker is approximately contributed by Weight of duct...

Страница 14: ...rrent collecting hub 10203 Upper and lower terminal 10009 10010 Insulating Rod 10100 Sealing bellow 10006 Poles are filled with SF6 or Nitrogen gas individually at a pressure of 1 2 bar abs 3 0 FUNCTION The typical schematic circuit diagram of the breaker shown in Fig 5 page no 54 The control circuit can also be referred in the order related engineering drawings 3 1 Switching operations As supplie...

Страница 15: ...through the linkage system The rotation of the common shaft moves the moving contacts of all the poles upward through the operating stud closing the circuit breaker This movement also exerts the required contact pressure on the moving contact Mechanical closing operation cannot be performed on the Magnetic Actuator Drive To open the circuit breaker the OPEN control element is actuated either elect...

Страница 16: ... the foundation bolts with the specified hardware Fig 2 3 page no 51 52 The exact location and the method of foundation can be obtained from the installation layout plan or a general arrangement drawing Fig 2 3 page no 51 52 The complete circuit breaker with control cabinet has to be mounted on the structure as shown in GA drawing Fig 2 3 page no 51 52 in such a manner to achieve minimum required ...

Страница 17: ...hat clearances are maintained properly 4 8 Low voltage connections The Auxiliary circuit connections shall be checked as per relevant schematic diagram for correctness See Fig 5 page no 54 for typical schematics A removable gland plate is provided in the bottom of the control cabinet which can be suitably drilled as per control cable glands 4 9 Earthing Earthing connection should be made as shown ...

Страница 18: ...ga ohms then a high voltage test with 28kV in case of 12kV and 50kV in case of 15kV for 1 minute shall be done for other configurations similar to Megger test If the insulation resistances are appreciably lower then 100 mega ohms an inspection for insulation fault should be made before proceeding with high voltage test 5 4 1 Low voltage circuits The auxiliary circuit wiring shall be checked with a...

Страница 19: ...eck control cable entrance fitting for tightness 6 Examine control wiring insulation for evidence of chafing or abrasion If desired a dielectric test can be made duplicating details of production tests as described earlier in this book Check connections according to schematic or connection diagram 7 See that all covers and bolted connectors are securely in place 8 Make a continuity check preferabl...

Страница 20: ...or of the spring operated mechanism indicates the position tensioned 5 10 Trial switching operations Give few Close Open command and see that the breaker Close Open Properly 5 11 Anti pumping device Issue a close command by applying a control voltage to terminal 101 102 leave the voltage applied The breaker will close Issue open command by applying a voltage to terminal 103 104 The breaker will op...

Страница 21: ...able gives the maintenance schedule showing the relative time intervals between maintenance work As far as the time interval between this operation is concerned it is advisable to comply with specification given in the table On the basis of the result obtained during the periodic inspection it is possible to set the optimal time limits for carrying out maintenance work Any circuit breaker which wi...

Страница 22: ...te overhaul Connection of electronics circuit Cleaning of electronic circuit Retention of spring circlips and spring washer Installation in normal ambient 2 years 1 year 4 years 2 years 2 years 1 year Five years or every Three years or every 10000 operations 5000 operations Ten years or every 10000 Five years or every operations 10000 operations 2 years 1 year 2 years 1 year 2 years 1 year Install...

Страница 23: ... Ask ABB Nasik for insulating parts replacement of the damaged parts Trace of overheating or loose Clean the connections and screws on the connection to the breaker terminals with the circuit breaker terminals a rough rag soaked in a suitable solvent cover them with neutral grease and tighten the screw Earthing Trace of the oxidation and Clean with a rough cloth connection or loose nuts soaked in ...

Страница 24: ...losing operation 1 4 2 Opening operation 1 5 Maintenance of Operating Mechanism 1 5 1 Maintenance Schedule 1 5 2 Fault finding chart 1 5 3 Replacement of operating coils 1 5 4 Replacement of micro switch 1 5 5 Replacement of motor 1 5 6 Replacement of mechanism 1 5 7 Recommended spares parts 2 0 BREAKER WITH MAGNETIC ACTUATOR MECHANISM 2 1 General 2 2 Operating principle 2 3 Conclusion and operati...

Страница 25: ...y cycle An indication shows whether the closed spring is charged or not and the number of opening operations are recorded by the counter The motor can be supplied via station battery a network or via transformer with a limit load of at least 500 VA The motor starts after each closing operation and charges the closing springs within 15 seconds 1 2 Construction The construction of the operating mech...

Страница 26: ......

Страница 27: ... arm returns to its position Closing spring gets stretched and this continues till the spring gets fully charged The backward rotation of the charging gear 2 is prevented by latches 4 A plastic cam activates Motor cut off switch Spring Charged indication will appear after full charging Closing lever 6 stops the shaft from further rotation Motor cutoff switch disconnect the supply of the motor Fig ...

Страница 28: ...11 29 Fig F Mechanism in open condition both the springs in discharged condition Fig G Closing spring is charged ready for closing operation ...

Страница 29: ...o the charging handle is 130 N In any case the maximum force applied must not exceed 170 N As the springs get charged a sound internal latches getting engaged can be heard The arm won t rotate the charging gear further since the charging gear has no teeth on remaining periphery 1 4 1 Closing Operation Consider both the springs are in discharged condition and breaker is open Ref Fig H In this condi...

Страница 30: ...hich is directly connected to charging shaft Rotation of cam will push this mechanism lever upwards this will results in rotation of the charging shaft Tripping lever is mounted on same charging shaft One end of this tripping lever is connected to common shaft of the breaker via link and another end is connected to tripping spring Rotation of around 90 will close the circuit breaker as well as cha...

Страница 31: ...g and internal detail for position of different components Latch Assembly La and Lb engaged with each other Engagement of La and Lb will confirm that breaker will not open in this condition unless and until the opening command is initiated Fig J Circuit Breaker closed tripping spring charged Fig K Circuit breaker in close condition ready for tripping operation ...

Страница 32: ...ce there is no more pressure or any engagement that will retain the current poison of arm and leverage Arm and leverages are free to move now As previously discussed these components are directly connected to charging shaft Tripping spring directly exerts pressure on the shaft via tripping lever As leverage becomes free to move tripping spring will pull back the tripping lever and open the circuit...

Страница 33: ...bsorbers for leakage or struck up 4 Checking of various tension springs and bending springs for their proper place 5 Closing and tripping spring assembly and split pin Circlip on them 6 Bearing items 7 Checking of Operation box Assembly for proper open close operation 8 Checking of setting Proper engagement of lever on shaft 9 Spring cut off micro switches 10 Lubrication of charging device and ope...

Страница 34: ... arm wrongly adjusted Breaker closes then opens again Operating coils does not operate The toggle joints of the mechanism are incorrectly adjusted Wrong wiring of the auxiliary circuit Wrongly adjusted clearances of opening magnets armature Anti pumping relay wrong or faulty Measure voltage on the motor leads Change motor Change motor Change mechanism Check by measuring Adjust the micro switch ope...

Страница 35: ...d fix new one e Reconnect the electrical connections and the linkage of the main shaft After fixing the operating mechanism the following check shall be carried out f Charge the closing spring g Close the breaker h If required then adjust the micro switch for proper operation i Check the breakers with the auxiliary supply connect while charging at minimum operating voltage of the motor j Take few ...

Страница 36: ...standard emergency manual operating system The magnetic actuator is designed in such a way that the armature can acts directly via the lever on the main shaft on the moving contact of the vacuum interrupter With this method of actuating force generation and transmission there is no wear of the mechanism Maintenance up to extremely high number of operating cycles is simply a thing of the past 2 3 C...

Страница 37: ... armature reaches the end position the proximity sensors or the limit switches sense that and give signal to the electronic unit to stop the discharge from the capacitor The electronic circuit consists of an AC DC converter and gives a constant output voltage to charge the capacitor irrespective of the input supply voltage It also includes a control unit which monitors all the function of the circ...

Страница 38: ... Remove the hardware which connects the top insulator lower terminal plate and bottom insulator take out the support insulator 10002 from the pole assembly Take care of rubber bellow during dismantling avoid any kind of damage to rubber bellow 6 Remove the top machined cover 10007 and bolt 10015 which holds the vacuum interrupter from top terminal plate 10009 7 Remove the top terminal plate 10009 ...

Страница 39: ...uct with nuts and bolts 8 Insert the operating stud with rubber bellow inside the suppor t insulator and place lower terminal plate and interrupter over support insulator 9 Lift the top insulator and put it over the lower terminal plate Engage lower terminal plate and insulator flanges by using nut bolts 10 Cover the top insulator by top terminal plate before that fix O ring 10005 on the top termi...

Страница 40: ...em description should be given for both circuit breaker and operating mechanism 1 Identification Date Customer Item designation Serial number Order number 2 Historical data Date taken into service Date of failure Date of last overhaul Total number of operating cycles since taken into service Total number of operating cycles since last overhaul Condition of the breaker when the failure was detected...

Страница 41: ...t Does not break the current Fails to carry current Breakdown to earth Breakdown between poles Internal breakdown across open pole External breakdown across open pole Locking on open or closed position Corona Loose parts Missing parts Faulty parts Corrosion Surface defect other than corrosion Incorrect function Incorrect closing time Incorrect opening time coil I 3 Characteristics of the failure m...

Страница 42: ...tives may be selected Strong wind Rain Sudden variation in temperature Snow ice or hoar frost Corrosive atmosphere Fog or high humidity Lightning o Ambient temperature C 5 Component responsible Many alternatives may be selected Components at service voltage Making and breaking unit Current collector hub Plug Laminar contact Top cap Interrupting Chamber insulator Vacuum interrupter Top terminal pla...

Страница 43: ... or heater Terminal blocks cables Driving motor for mechanism Operating mechanism unit ESH mechanism Magnetic actuator Different Assemblies in ESH Mechanism Opening coil set up Closing coil set up Tripping spring assembly Electric motor Auxiliary switch Indicators Counter Opening breaker indicator Closing breaker indicator Hook assembly for charging gear Charging gear assembly Shock absorber Closi...

Страница 44: ...sm housing Operating Shaft Lever Common Shaft Plates Instruction plate Rating plate Cabinet Packing 6 Consequences Multiple alternatives may be selected Unplanned removal from service Planned removal from service Major disturbance Minor disturbance Fire or explosion Removal from service of other breakers to prevent repetition of failure Circuit breaker downtime Beyond planned time hours ...

Страница 45: ...it breaker pole Exchange of operating device Exchange of circuit breaker Action to be taken Select only one alternative By personnel from ABB in Nasik By personnel from ABB in current company By customer s personnel Time required to obtain spare parts hours Time required for repair hours Place Signature Date Name Designation ...

Страница 46: ...ESH Mechanism with Cabinet 8 ESH Mechanism with Operating rod and lever 9 Dismantling of operating coils setup 10 Steps for replacement of shunt opening release Y02 11 Steps for replacement of shunt opening release Y01 12 Steps for replacement of shunt closing release YC 13 Operating Coils setup for temperature 10 C 14 Steps for replacement of motor 15 Motor 16 17 Steps for replacement of micro sw...

Страница 47: ...x Bolt M8 X 20 10013 S S Hex Bolt M12 X 75 10014 S S Hex Bolt M12 X 50 10015 S S Hex Bolt M12 X 45 10016 Conical Spring Washer S S M8 10017 Conical Spring Washer S S M12 10018 Current collector hub for SDB 10019 S S Hex Nut M12 10020 Eye Nut 10021 M S Hex hd Bolt M8 X 40 10022 SS plain washer M8 10023 Plain washer 14X24X2 5 SS 10024 Conical spring washer M8 10201 Special washer 10202 Guide ring 10...

Страница 48: ...Operation Box Assembly 15013 Push button For Closing 15014 Push button For Opening 15015 Opening Breaker Indicator 15016 Posterior Plate Assembly 15017 Column For fixing Shield 15018 Bending Spring 15019 Hook Assembly 15020 Hook Support Shaft 15021 Intermediate Plate 15022 Front Plate 15023 Power Shaft 15024 Bearing Spacer 15025 Bearing 15026 Charging Shaft 15027 Auxiliary Switch 15028 Connection ...

Страница 49: ...Fig 1 Lifting of Circuit Breaker 50 ...

Страница 50: ...amber Fb Foundation bolt M20X500lg Galvanised Ln Lifting Eye bolt Ms Control cabinet Mt Manual tripping handle PL Plinth level Vi Supporting insulator Vs Supporting structure Galvanised Ow Observation window Transparent polycarbonate Fig 2 GA Drawing of OVB SDB Breaker with ESH mechanism ...

Страница 51: ... Earthing point Galvanised Bus 50 X 6 thk Fi Interrupting chamber Fb Foundation bolt M20X500lg Galvanised Ln Lifting Eye bolt Ms Control cabinet Mt Manual tripping handle PL Plinth level Vi Supporting insulator Vs Supporting structure Galvanised Ow Observation window Transparent polycarbonate ...

Страница 52: ...Fig 4 Breaker Pole Assembly Refer legend on pg 48 53 ...

Страница 53: ...Fig 5 Schematic Circuit Diagram 54 ...

Страница 54: ... with Cabinet Refer Legend on page 49 15018 15017 15021 15024 15025 15020 15022 15019 15023 15014 15015 15013 15026 15012 15016 15001 15005 15012 15013 15002 15003 15004 15000 15007 15004 15006 15009 15010 15008 15011 55 ...

Страница 55: ...15029 15027 15028 Fig 7 ESH Mechanism with Cabinet Refer legend on pg 49 56 ...

Страница 56: ...Fig 8 ESH Mechanism with operating rod and lever Refer Legend on pg 49 15000A 15036 15035 15034 57 ...

Страница 57: ...of the operating mechanism For assembly proceed in the reverse order FOR ASSEMBLY PROCEED IN REVERSE ORDER YO2 SHUNT OPENING RELEASE Unscrew the four coil fixing screws 14 and withdraw the relative YC coil 15 Unscrew the four coil fixing screws 19 and withdraw the relative YO1 coil 18 Steps for replacement of shunt opening release Yo2 15030 58 ...

Страница 58: ...When the YC shunt closing release is present unscrew the four fixing screws 14 and withdraw it 15 Unscrew the four fixing screws 17 and withdraw the relative YO1 release 16 Disconnect the power supply connectors of the additional shunt opening release Fig 12 YC SHUNT CLOSING RELEASES Unscrew the four fixing screws and withdraw release 8 FOR ASSEMBLY PROCEED IN REVERSE ORDER 59 ...

Страница 59: ...push the lever towards 4 Unscrew the motor flange fixing screws 6 Raise the pair of driving latches using screwdriver and push the lever 3 forward Remove the two motor limit microswitch fixing screws 2 Fig 14 Operating Coil Set Up for Temperature 10 deg C Fig 13 60 ...

Страница 60: ...Disconnect the motor power supply 7 Fig 15 Motor 61 ...

Страница 61: ...15033 For assembly connect the Faston as it was in its original position Unscrew the microswitch fixing screws Fig 16 Unscrew the microswitch fixing screws 2 Disconnect the microswitch connection 4 Pull down cover of microswitch 3 To assemble proceed in reverse order Fig 17 62 ...

Страница 62: ...Fig 18 The Magnetic Actuator 63 ...

Страница 63: ...Notes ...

Страница 64: ...Ballard Estate Mumbai 400 038 Tel 91 22 56318231 39 Fax 91 22 56318276 77 Vandana House 1st Floor G E Road Ramkund Raipur 492 001 Tel 91 771 2660816 18 Fax 91 771 2653391 4th Floor Sona Towers 71 Miller Road Bangalore 560 052 Tel 91 80 2256315 16 Fax 91 80 2254147 Nos 3C 3D and 3F 3rd Floor Century Plaza 561 562 Anna Salai Tennampet Chennai 600 018 Tel 91 44 24340201 203 Fax 91 44 24340282 ABB Lim...

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