Related Manuals for ABB OVB-SDB
Summary of Contents for ABB OVB-SDB
- Page 1 Outdoor Vacuum Circuit Breaker - Type OVB-SDB Instruction for Storage, Installation, Service and Maintenance...
- Page 2 PART B: Instructions for Erection, Operation & Maintenance. General Design Function Erection Commissioning Maintenance PART C: Operating Mechanism Working Principle and Maintenance Breakers with spring charged mechanism Breakers with magnetic actuator mechanism Breaker pole OVB-SDB Failure Report List Of Drawings Diagrams and Legends...
- Page 3 PART A: HANDLING, STORAGE AND PRE-ERECTION ASSEMBLY 1.0 PACKING LEGEND AND HANDLING DURING TRANSPORTATION 1.1 Packing legend 1.2 Handling 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...
- Page 4 1.0 PACKING LEGEND AND HANDLING DURING TRANSPORTATION 1.1 Packing legend Each case is marked with the case number on at least two sides ( for exports - four sides) 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.
- Page 5 1.2 Handling during transportation The circuit- breakers shall never be transported without packing. The cases shell be transported in such a way that they: Do not stand in water. Are not exposed to damage Every case must be secured during transport. They must be arranged so that the cases cannot move in any direction.
- Page 6 2.0 STORAGE PRIOR TO ERECTION 2.1 General Circuit- breakers intended for outdoor operation are generally delivered in units, which are designed for transport purpose. Intermediate storage of these units should be avoided. If it is not possible, then to avoid intermediate storage, they should be stored indoors or under roof.
- Page 7 Each delivery is to be checked on receipt for, Completeness and correctness. (Check against order and delivery documents) Any possible damage in transit and material losses. Abnormality, if any, must be notified immediately to: ABB, Nasik , forwarding agents and the insurance company. 2.2 Operating Mechanism The operating mechanism should be unpacked on arrival.
- Page 8 Place the case horizontally on a flat surface before opening the cover. Check that all parts are included in the delivery. Check the packing list. Check that no parts have been damaged during transport; especially the porcelain insulators. Report any faults immediately to the ABB representative.
- Page 9 3.3 Safety Precaution When working on high-voltage circuit breaker the below-mentioned risk must be taken into consideration and corresponding safety measures taken. RISK SAFETY MESAURES 1) Work next to high voltage Warning plate is placed inside the door of the operating device. Disconnect the supply and earth near the workplace.
- Page 10 PART B: INSTRUCTION FOR ERECTION, OPERATION & MAINTENANCE 1.0 General 1.1 Type designation 1.2 Specifications 1.3 Weight of the Circuit Breaker 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.
- Page 11 5.0 Commissioning 5.1 General checks 5.2 Wiring 5.3 Cleaning 5.4 Electrical checking 5.4.1 Low voltage circuits 5.4.2 High voltage circuits A Circuit breaker in open 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...
- Page 12 1.0 General 1.1 Type designation OVB-SDB Outdoor Vacuum Circuit Breaker Type SDB Rated voltage – 15kV 12 for 12kV 15 for 15kV Rated normal current - 2000A 08 for 800 Amp 12 for 1250 Amp 16 for 1600 Amp 20 for 2000 Amp Rated breaking capacity –...
- Page 13 1.2 Specifications Specifications are contained in the order documentation and on the nameplate. Type Vacuum Circuit Beaker OVB-SDB 15 Sr. No. Breaker production Serial No. Year Year of manufacture Standard IEC – 62271-100 Rated voltage 15kV Frequency 50 Hz Insulation level 50/110kV.
- Page 14 2.0 DESIGN The circuit breaker type OVB-SDB is a three pole vacuum circuit breaker and designed in a column type construction with either “spring stored energy operating mechanism” or “Magnetic Actuator mechanism”, mounted beneath the middle part. It consists of, (Refer Fig.2 &...
- Page 15 Closing operation Spring operated mechanism To close the circuit breaker the “ CLOSE" control element is actuated either electrically through the closing magnet or mechanically through push button arrangement. This enables the, spring stored energy mechanism to release the spring energy, through the linkage system, which rotate the common shaft. The rotation of the common shaft moves the moving contact of all the poles upward through the operating stud, closing the circuit breaker.
- Page 16 4.0 ERECTION 4.1 General As supplied from ABB Ltd., Nasik the circuit breaker are complete in all respect with all the necessary settings for smooth and trouble free operations of the circuit breaker. All the moving parts of the circuit breaker are positioned correctly and coupled together and they are well secured with the fasteners.
- Page 17 4.7 High voltage connection The high voltage connection fasteners shall be preferable of M12 size stainless steel bolts/galvanized bolt and nut and at least one washer and 1 spring washer. Terminal connectors (Aa - Fig.2 & 3, page no51 & 52) should be properly cleaned using stainless steel wire brush to remove the aluminum oxide film and conducting grease to be applied.
- Page 18 5.0 COMMISSIONING 5.1 General checks All necessary settings and adjustments have been made and the units have been fully tested both electrically and mechanically before dispatch at the factory. Hence, normally no setting and adjustment are required at the site. 5.2 Wiring Unit wiring is identified by numbered ferrules.
- Page 19 5.5 Checking the soundness of vacuums interrupters Before putting the breaker in service or if any interrupter is suspected for leakage, then the interrupter shall be checked for satisfactory level of vacuum by applying a high voltage of 22 kV across the open gap of the interrupter for a period of 1 minute. Care should be taken to ensure that the external sequential isolators are opened prior to high voltage application.
- Page 20 After the interruption by OPEN command the circuit breaker should not re-close in spite of the CLOSE command still being present. Note: The ESH operating mechanism on OVB-SDB circuit breaker is fitted with a mechanical anti- pumping device, which prevents re-closing due to either electrical or mechanical commands. 5.12 Check of heaters: Measure the resistance or apply voltage and measure the current, when the thermostat controlled additional heater is installed, check the adjustment of thermostat.
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Page 21: Maintenance
6.0 MAINTENANCE 6.1 Caution Before carrying out any maintenance work ensure that, The circuit- breaker is opened and the external sequential isolators are opened and the unit is properly earthed. The closing spring is discharged. 6.2 General During normal service the circuit breaker require only limited maintenance. The frequency and the sort of inspection and maintenance basically depend on the service conditions. - Page 22 6.4 Maintenance Schedule Installation in normal Installation in dusty Maintenance or polluted ambient operation ambient Carry out the 2 years 1 year general inspection (For details, refer clause 6.5) 4 years 2 years Measure the insulation resistance 2 years 1 year Lubricate the sliding points Carrying out the...
- Page 23 Re-fix the locking rings in loose nuts or screws. Their position and tighten the nuts & screws Distortion or cracking of the Ask ABB Nasik for insulating parts replacement of the damaged parts Trace of overheating or loose Clean the connections and...
- Page 24 PART C: OPERATING MECHANISM WORKING PRINCIPLE AND MAINTENANCE 1.0 BREAKER WITH SPRING CHARGED MECHANISM 1.1 General 1.2 Construction 1.3 Operating mechanism - Working principle 1.3.1 Electrical spring charging 1.3.2 Manual spring charging 1.4 Breaker Operation 1.4.1 Closing operation 1.4.2 Opening operation 1.5 Maintenance of Operating Mechanism 1.5.1 Maintenance Schedule.
- Page 25 1.0 BREAKER WITH SPRING CHARGED MECHANISM 1.1 General The operating mechanism has a spring charging device, which can be operated by motor or manually. The operating device has helical tension spring for closing and opening. The opening spring is charged automatically when the breaker is closed. closed breaker with...
- Page 27 1.3 Operating mechanism - Working principle There are two options for charging the springs 1. By electric motor. 2. Manual operation 1.3.1 Electrical Spring Charging (Ref Fig E) Spring charging unit consists of Arm (1), Charging gear (2), Closing Spring (3), latches (4), reduction gear with Spring charging Motor and Cam (5).
- Page 28 Fig F Mechanism in open condition & both the springs in discharged condition Fig G Closing spring is charged, ready for closing operation...
- Page 29 The spring charging motor charges the springs after each closing operation until the spring- charged indication appears. Should there be no voltage during charging, the geared motor stops, and starts recharging the springs automatically when the voltage is on again. It is, however, always possible to complete the charging operation manually.
- Page 30 Fig. H Mechanism in open condition & both the springs in discharged condition Fig. I Mechanism in open condition & closing springs is charged If close command is initiated now, it will rotate half shaft (Ref Fig. J). Rotation of half shaft will release closing lever and hence charging gear.
- Page 31 Fig. J Circuit Breaker closed, tripping spring charged 1.4.2 Tripping Operation: Fig. K Circuit breaker in close condition, ready for tripping operation Now with previous reference consider tripping spring is in charged condition. Fig. K shows the charged condition of the tripping spring and internal detail for position of different components.
- Page 32 Fig. L Circuit Breaker in open condition If trip command is initiated now, it will pull the latch (Ref. Fig. L). Hence its engagement with the latch assembly will break. This will move the latch assembly La in downward direction. Downward movement of latch assembly will release the latch Lb.
- Page 33 Spring cut off micro switches. Lubrication of charging device and operating gear NOTE 1. Complete overhaul of circuit breaker operating mechanism to be done after 10000 operation or 10 years, whichever is earlier. 2. Ask ABB Nasik for details of overhaul procedure.
- Page 34 1.5.2 Fault finding chart FAULT CAUSE REMEDY Measure voltage on Motor has wrong or no Spring does not get the motor leads. operating voltage. charged Change motor. Motor shaft broken. Change motor. Motor gear damaged. Change mechanism. The latch for the tripping device does not function.
- Page 35 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 &...
- Page 36 2.3 Conclusion and operation (Fig. 18, page no. 63) The magnetic actuator used in the vacuum circuit breaker type OVB-SDB uses a laminated yoke structure 1 to facilitate the permanent magnet 2 to hold the structure 5 in the end positions.
- Page 37 In the similar manner, if the lower coil 3B is energized. The magnetic flux in the lower part will be increased and the armature 5 will be moved to the lower position, which corresponds to the lower end position of the actuator. The energizing current to the coils is supplied from a capacitor unit, which is charged by an electronic unit.
- Page 38 3.0 BREAKER POLE 3.1 General The 12/15 kV Outdoor Circuit Breaker type OVB-SDB is developed using well-proven vacuum interrupters. Excellent arc quenching and insulating properties of vacuum offer long reliable service. The construction of the pole of this breaker is very simple and has very less number of moving parts, so the operating energy level is very low, thus it requires practically no maintenance.
- Page 39 3.1 Assembly of the pole (Ref. Fig 4, page no.53) 1. Clean all the components used in the pole. 2. Interrupter Assembly: -Insert the plug for lamellar contact 10203 on the stem of the interrupter. Maintain the distances B and C as shown in fig.4, page no. 53 and tighten the assembly by applying proper torque.
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Page 40: Failure Report
OVB-SDB circuit breaker FAILURE REPORT Number (by ABB) In case of failure please take a copy of this form is and complete it as fully as possible, to make feasible failure analysis and rectify it. For selecting options tick suitable box. If no alternative is applicable, proper description can be filled out in the space provided. - Page 41 Use of the circuit- breaker (Only one alternative to be selected) Line breaker Reactor breaker Capacitor breaker Transformer breaker By-pass breaker 3. Characteristics of the failure (many alternatives may be selected) Does not close on command. Does not open on command. Closes without command Open without command Does not make the current...
- Page 42 Incorrect opening time, coil II Incorrect damping Incorrect CLOSE/OPEN time Too high resistance Incorrect pre-insertion time for the resistors Incorrect time span between contacts 4. External circumstances (Many alternatives may be selected) Strong wind Rain Sudden variation in temperature Snow, ice or hoar-frost Corrosive atmosphere Fog or high humidity Lightning...
- Page 43 Main insulation to earth Post insulator Interrupting Chamber insulator Electrical control and auxiliary circuits Operating magnet Closing magnet Auxiliary contact Counter Control panel Limit switch Micro switch Thermal relay or heater Terminal blocks, cables Driving motor for mechanism Operating mechanism unit ESH mechanism Magnetic actuator Different Assemblies in ESH Mechanism...
- Page 44 Opening transmission lever Closing transmission lever Different assemblies in magnetic actuator Electronics Unit Charging Capacitor Magnetic Actuator Mechanical transmission Mechanism 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...
- Page 45 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)-----------------------...
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Page 46: List Of Drawings
LIST OF DRAWINGS FIG. NO. NAME OF THE FIG. Lifting of Circuit Breaker. Circuit Breaker with ESH mechanism GA drawing. Circuit Breaker with magnetic actuator GA drawing. Breaker pole Assembly. Schematic Circuit Diagram. ESH Mechanism. ESH Mechanism with Cabinet. ESH Mechanism with Operating rod and lever. Dismantling of operating coils setup. - Page 47 LEGEND FOR FIG.4 10001 Top Insulators 10002 Support Insulator 10100 Operating stud assembly 10200 Interrupter assembly 10003 Lamellar contact; L=145 10004 Top ‘O’ Ring 10006 Sealing bellow 10007 Cover machined 10008 ‘O’ ring 10009 Top terminal with SDB with VG4 10010 Bottom terminal for SDB (VG4) 10011...
- Page 48 LEGEND FOR FIG. 6, 7 & 8 15017 Column For fixing Shield 15000A Operating Mechanism 15000 Closing Lever 15018 Bending Spring 15019 Hook Assembly 15001 15020 Hook Support Shaft 15002 Charging Gear Assembly 15021 Intermediate Plate 15003 Charging lever group Assembly 15022 Front Plate 15004...
- Page 49 Fig. 1 Lifting of Circuit Breaker...
- Page 52 Fig. 4 Breaker Pole Assembly (Refer legend on pg. 48)
- Page 55 15029 Fig.7 ESH Mechanism with Cabinet (Refer legend on pg. 49)
- Page 57 Dismantling of Operating Coils Setup Unscrew the fixing screw of the release group mount Withdraw the release group mount from the front of the operating mechanism. For Fig.9 assembly, proceed in the reverse order. Steps for replacement of shunt opening release (Yo2) 15030 YO2 SHUNT OPENING RELEASE Unscrew the four coil fixing screws Unscrew the four coil fixing screws...
- Page 58 Steps For Replacement of Shunt Opening Release (YO1) 15030 SHUNT OPENING RELEASE When the YC shunt closing release Unscrew the four fixing screws is present, unscrew the four fixing (17) and withdraw the relative screws (14) and withdraw it (15) YO1 release(16).
- Page 59 Operating Coil Set-Up for Temperature –10 deg. C Fig. 13 Remove the two motor limit microswitch fixing screws (2) Raise the pair of driving latches using screwdriver and push the lever (3) forward. Release the return spring, raise the pair of charging Unscrew the motor flange fixing screws (6) pawls and push the lever towards (4).
- Page 60 Disconnect the motor power supply (7) Motor Fig. 15...
- Page 61 Steps for replacement of micro-switch 15033 Disconnect the microswitch connection Unscrew the microswitch fixing screws For assembly connect the Faston as it was in its original position 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...
- Page 63 Notes...
- Page 64 ABB Limited ABB Limited Medium Voltage Equipment Power Technologies Street No. 17 Exports Marketing Office Maneja, Vadodara 390 013 MIDC, Satpur Nashik 422007 Tel: +91 265-2638930 Fax: +91 265-2638908 Tel: +91 253-2351095 - 98 Fax: +91 253-2350644 Email: pt-exports.inabb@in.abb.com Regional Marketing Offices:...