24kV-27kV Air Insulation Switchgear
Contents
1. oa Power Cable Duct 800 1000 Detail of switchgear cable access cutout 1800 1700 Switch room cable duct arrangement Side elevation m rame v 2 Y 9 5 O ao a B 1800 zi a 1800 al gt 1700 1700 gt 800 1000 800 800 1000 009 Power Cable Duct Power Cable Duct HH HH IS lb HH mL 1800 zo sol 1800 _ 150 150 l Connection betweenSwitchgears In order to connect the different switchgears together here use bolts of M8 35 to connect the panels together the torque requirement for the bolts is 26 N m the connection points on the switchgear is shown below Connection Points betweenSwitchgears Technical Specification Technical specification for Se Rated voltage ree ne Ea eT re a Rated lightning impulse withstand voltage AA WW A Rated current IP level for weather protection coGear Table 1 kV Between compartment 24 27 lt 85 gt 20004 Technical specification for SecoVac VB2 Plus Circuit breaker Table 2 Rated voltage Rated power frequency withstand voltage eee tine au ARETE a A ne2. y D e e T a Figure 3 7 Measuring panel 1250 2500A 15 le m h aal Mol ama em o o o o o Figure 3 11 CPT panel 25004 Description Rated current of branch 1250A 31 5kA Width VT Rated current of branch 2500A 31 5kA Dimension in 27kV mm oa A a L Figure 3 12 Typical dimensions and Weights of SecoGear including withdrawable circuit breaker parts Rated current Weight Kg 1000 1200 14 1 Cable Connections The cable compartment contains current transformers voltage transformers fixed or withdrawable and earthing switch depending on the individual operating requirements The cable compartment is constructed for installation of three current transformers When all the three current transformers are not required dummies can be installed in their place to maintain the same installation and connection procedures The fixed or withdrawable voltage transformers are connected with busbar on the primary side and fitted with HRC fuses The earthing switch can be operated manually with position indication by mechanical indicator on the driveshaft and auxiliary switch Three lightning arrestors optional can be mounted in the space available Cable connection Rated v
3. connection between the individual panels will be provided Enclosure and partitioning High quality 2mm thick Alu Zinc steel sheets is used for the external enclosure and internal partitions Pressure relief flaps are provided on the top of the panel for all high voltage compartments In case of overpressure due to internal arc inside any of the compartments these pressure relief flaps are designed to open quickly to release the pressure The pressure relief flaps are secured with steel screws on one side and with plastic screws on the other side In the case of internal overpressure the plastic screws are the point of rupture caused by arc conditions The top mounted pressure relief flaps on the enclosure are made from mesh metal All compartments are accessible from the front with their own independent doors The front doors can be opened up to an angle of 130 and they are arc resistant An inspection window made of security glass is provided on circuit breaker compartment door The panel design provides an air gap between two adjacent panels after panels are joined together Figure 3 1 Typical modules e Figures of the panel Refer to figure 3 2 the floor of the cable compartment is fitted with removable non magnetic metal 13 The rear wall of the busbar compartment 3 intermediate wall 14 mounting plate with shutters 16 and horizontal partition 20 form part of the internal partitioning The earthed int
4. Close the earthing switch e Check that the voltage presence indication on the low voltage compartment is off e Check other electrical interlock if applicable to allow the operation e See figure 4 9 Lower the operating hole shutter and insert the operating handle and turn the handle 180 clockwise to close the earthing switch Figure 4 10 Open earthing switch Figure 4 9 Close earth switch e Ensure the earthing switch is fully closed A Warning Check the position indicator on low voltage compartment door Check the flag adjacent to the earthing switch operating hole Open the earthing switch A Warning Make sure the cable compartment is clear and without any unexpected objects Make sure the cable compartment door is closed completely e Insert the earthing switch operating handle and turn the handle 180 4 10 counterclockwise to open the switch See figure e Check the mechanically interlocked label and indication light to ensure the earthing switch is fully open Interlocking of the switchgear e The circuit breaker can be closed only when fully engaged in the test or service position e The control plug can be released when the circuit breaker is in test or disconnected position The secondary plug is latched when the circuit is in service position see figure 4 11 Figure 4 11 Secondary plug latch e Front Break is released only when operating lever is inserted and operating lever
5. Comply with all relevant safety regulations b Maintain circuit breakers in disconnection position c Remove earth wires and short wires of the hazardous areas d Pay attention to any abnormal situations Use of hand tools 1 Gear door lock key drawing no 5GD 253 008 en 2 Rack handle for truck drawing no Y 002 E Attention Remove the shipping cap on the pole of the circuit breaker When testing the power frequency withstand voltage of main circuit pay particular attention to sensors cables and other equipment during the test process Read the product manual carefully when testing the VT withstand voltage use a test voltage of appropriate frequency to avoid core saturation j Place the Circuit Breaker on auxiliary control power k Perform the operation test of the circuit breaker by manual or electric control observe the corresponding position indicator Check the interlocking validity both mechanical and electrical m Conductive paste can be applied on the circuit breaker primary contacts 3 Earthing switch operation handle drawing no 5GD 253 144 FIG 20 Hand Tools 16 17 Rack Circuit Breaker out from service position to test disconnected position Move circuit breaker truck from transfer truck into the switchgear a Check the fixed primary contact and apply an adequate amount of conductive paste Check the interlocking mechanism and apply lubricant on the moving par
6. Major Repairs and Examples Inspection and replacement of the main busbar Inspection and replacement of the fixed contact and spout bushing Inspection and replacement of the shutter mechanism Replacing the earthing switch Replacing the current transformer Inspection and replacement of the surge arrester Main Busbar Spare Parts Appendix A Onsite Service Safety Instruction 25 25 26 27 27 29 30 31 Se 32 Safety first Important Recommendations e Switchgear should be installed in a clean dry ventilated room e Switchgear and or switchboards should be installed in closed rooms suitable for electrical equipment e Installation operation and maintenance should be carried out by licensed electricians e Fully comply with the applicable standards e g IEC the utility connection requirements and the applicable safety regulations e Observe the relevant instructions in the instruction manual for all actions in relation to switchgear and switchboards e Pay attention to the hazard notes in the instruction manual marked with this A warning symbol e Make sure that the specified data are not exceeded under switchgear or switchboard operating conditions e Keep the instruction manual accessible to all personnel involved in installation operation and maintenance e The users must act responsibly in all matters affecting safety at work and correct handling of the switchgear A Warning e Always follow the instructi
7. but requires care to prevent incorrect The purpose for routine inspection is to find issues in advance so they can be resolved immediately 22 Za Routine inspection includes Check compartment doors are closed properly e Verify the control voltage auxiliary voltage and battery voltage are in normal condition The status indication and position indication for the circuit breaker and earthing switch etc are normal e Check ammeter and voltmeter on the display Check relay indications The power indication should be on and fault indication should be off Check alarm and pre alarm indications Partial discharge should not occur on the surfaces of equipment at operating voltage This can for example be detected by characteristic noises a clearly perceptible smell of ozone or visible glowing in the dark Check the heater condition if installed The relay monitoring the heater current is in the low voltage compartment Check the heater circuit if the red current indication turn off due to the heater losing power supply see figure 5 1 Heater current indication BO DOE ODA e age am if Ann aera met E li DDT BEER TTF RODD Pon Ca aa E TOTO gt Bi la Amb 43 tex A aN lr TANIA A JOP3022W IBEDDWAME E Figure 5 1 Heater current monitoring relay If any abnormal condition is found then the cause must be identified in order to restore normal condition Service A Safety measure T
8. interval years when operated in very severe running conditions 2 According to inspection results 3 Refer to the VCB manual Diagnosis and trouble shooting for malfunction during operations Malfunction The circuit breaker can not be racked into service position from test position The circuit breaker can not be racked out to test position from service position Can not lower the shutter on the earthing switch operating hole Operating hole shutter can not rise back after the earthing switch is opened The cable compartment door can not be closed opened The circuit breaker can not be closed The circuit breaker can not be opened Maintenance item and cycle A characteristics in accordance to the manufacturer s instructions and IEC standards It is recommended any major repairs if required shall be assisted by the manufacturer or a qualified representative Reason 1 The handles on the withdrawable frame is not in position 2 The circuit breaker is closed 3 The earthing switch is closed 4 The circuit breaker is electrically interlocked electromagnetic YO locked 5 Shutter is not completely open 1 The circuit breaker is closed 2 The circuit breaker is electrically interlocked electromagnetic YO locked 1 The circuit breaker is not in test disconnected position 2 The earth switch is electrically interlocked Drive shaft of earthing switch has not reached intended position The e
9. 8 Electrozavodskaya street Moscow 107023 T 7 495 9371111 South Africa Unit 4 130 Gazelle Avenue Corporate Park Midrand 1685 P O Box 76672 Wendywood 2144 T 27 11 238 3000 United Arab Emirates Injaz Building 3rd Floor Dubai Internet City PO Box 11549 Dubai T 971 4 4546912 United Kingdom 2 The Arena Downshire Way Bracknell Berkshire RG12 1PU T 44 0 800 587 1239 North America USA 41 Woodford Avenue Plainville CT USA 06062 and 12305 Kurland Drive Houston TX USA 77034 T 1 800 431 7867 Printing Code GE PV2 MU 2013 01
10. GE ORO Industrial Solutions Jaman SecoGear 24kKV 27kV Air Insulation Switchgear User Manual GE imagination at work k Index General Summary Standard and Specification Operating Conditions Safety and Environment Protection Requirement Handling and Storage Installation of Switchgear Technical Specification Technical specification for SecoGear Table 1 Technical specification for SecoVac VB2 Plus Circuit breaker Table 2 Main circuit resistance of SecoVac VB2 plus Table 3 Technical specification for Earthing switch Table 4 Resistance to internal arc faults Optional Keylock Optional Padlock Optional Enclosure design and equipment Typical Modules Figures 3 1 Enclosure and Partitioning Figure 3 2 Switchgear Structure Cable Connections Operations and trouble shooting Operations and trouble shooting Rack Circuit Breaker out from Service Position to Test Disconnected Position Circuit Breaker Earthing Switch Operation Interlocking of the Switchgear Debugging of Combined Overcurrent Relay Inspection and Maintenance Summary Inspection and Maintenance Interval Diagnosis and Trouble Shooting for Malfunction During Operations Maintenance Item and Cycle Routine Inspection Service Repairs Inspection Items Performance Test Aa XENA NU NNN CO CO CO N N N J 11 11 11 12 15 16 16 17 18 18 19 20 21 21 21 22 22 22 25 24 24 24
11. Rated short time withstand current Rated peak value withstand current Rated duration time for short circuit Operation sequence Mechanical life operations Single Capacitor Switching current Consult with GE 1250 2500 31 58 Up to 52 O 0 3s CO 15s CO O 0 3s CO 180s CO Main circuit resistance of SecoVac VB2 plus Table 3 Item Rated current A Sn Unit A 1250 Value 2500 Technical specification for Earthing switch Table 4 S N Specification Rated voltage Rated short time withstand current 3s nO Be UNB 6 7 Centre distance between phases 8 Electric endurance Mechanical endurance Ko Resistance to internal arc faults Arc release All three primary compartments of SecoGear switchgear are provided with pressure relief flaps which will automatically open and guide the pressurized gas to the rear side direction if an internal arc fault occurs in an affected compartment The pressure relief protects damage to switchgear components and the risk of injury to personnel which may endanger an operator or extend the arc fault effect to the entire switchgear lineup The relief flap is fixed by 3 M8 steel bolts and the other side is fixed by plastic M6 screw The M6 screw will be broken and flap will open along weakness areal No bend area and part with oblong holes when pressure increase quick by internal arc Keylock Optional Unit a o E a l a E eas Rated Lig
12. arthing switch is not completely opened 1 No auxiliary power supply 2 The control plug is not inserted 3 The circuit breaker is not engaged in test service position 4 The closing spring has not been charged 5 The electrical interlocking in position 6 Closing release not working 1 No auxiliary power supply 2 Opening release not working Resolution 1 Adjust the frame and handles 2 Open the circuit breaker 3 Open the earthing switch 4 Unlock Check electromagnetic YO 5 Check shutter drive mechanism 1 Open the circuit breaker 2 Unlock Check electromagnetic YO 1 Rack the circuit breaker out to test position or disconnected position 2 Unlock Check electromagnet Turn the crank anticlockwise to the limit where the mechanical OPEN indication stays exactly below the operating hole Open the earthing switch 1 Turn on auxiliary power supply 2 Insert and lock control plug 3 Fully engage the circuit breaker to test service position 4 Charge the closing spring 5 Check power supply for interlocking 6 Check power supply for closing release 1 Turn on auxiliary power supply 2 Check power supply for opening release Maintenance of the switchgear should be carried out by trained personnel who are familiar with the switchgear AN operations Routine Inspection Safety measure Routine inspection is to ensure smooth operation of the switchgear It does not require power shutdown
13. ary power and if any personnel is present and all safety emergency exits are clear e Ensure if safety procedures on working sheet are well implemented recheck if the safety procedures comply with requirements if isolation procedure between live equipment and test equipment is established and there are clear instructions on the product labels e Once equipment is in power off phase it is strictly forbidden to operate the circuit breaker or switch Please switch OFF circuit breaker and move VCB to test or withdrawn position Instrument and power transformer to power of the equipment shall be switched off in order to avoid any unintended charging of the equipment Please confirm the switchgear reference data and series number to avoid working on the wrong equipment All current transformer and voltage transformer secondary winding shall only have one permanent and reliable protective earthing If it is necessary that personnel must service the switchgear please make sure to contact GE or that site personnel is properly trained and are capable of following proper safety measures SE Greater China Shanghai 4F Building 2 CTP No 1 Hua Tuo Rd Zhang Jiang Hi Tech Park Shanghai China 201203 T 86 21 3877 7888 F 86 21 3877 7600 South East Asia Taiwan 6F No 8 Min Sheng E Rd Sec 3 Taipei 10480 T 886 2 2183 7000 F 886 2 2516 6829 Shanghai GE Guangdian Co Ltd No 3 Lane 123 East Huancheng Rd Fe
14. aximum 40 C 24h Medium 435 C Minimum 15 C e The maximum site altitude is 1000 m above sea level e The intensity of earthquake should not exceed level 8 Special operating conditions SecoGear is suitable for operation in the climate of indoor type according to IEC 62271 200 standard Special operating conditions must be discussed with the manufacturer in advance For example At site altitudes above 1000 m the effects of the reduction in density of air on the dielectric properties must be taken into account Increased ambient temperatures must be compensated for in the design of the busbar and the branch conductors as well as the withdrawable parts otherwise the current carrying capacity will be reduced Fitting additional ventilation facilities can assist heat dissipation in the switchgear panel e Humidity Highest average value measured over 24 hours o Relative humidity 95 Highest average value measured over 1 month o Relative humidity 90 Note on any special climatic operating conditions When the switchgear is operated in areas with high humidity and or major rapid temperature fluctuations there is a risk of condensation Preventive actions e g applying an electric heater must be consulted with the manufacturer to avoid condensation and any resulting corrosion or other adverse effects The control of the heaters depends on the particular project are available Safety and Environment Protection R
15. cannot be inserted when undercarriage is in test position e Undercarriage Interlock is released only when undercarriage is in test position e Undercarriage and ES interlock insures undercarriage can be in service position only when ES is OFF Back Break insures ES can be switched only when back door is closed Back Door Interlock is released only when ES is ON Interlock with Rear door Interlock with VCB undercarriage door Padlock cover for ES operation Fig 4 12 Earthing switch interlock with rear cover Fig 4 13 Breaker interlock with undercarriage SEQUENCE OF EARTHING SWITCH OPERATION Closing the earthing switch Press the handle slide downwards insert earthing switch operation handle and turn the handle 180 degree clockwise to close the earthing switch Opening the earthing switch Press the handle flap downward insert earthing switch operation handle and turn the handle 180 degree counter clockwise to open earthing switch The flap will be in lower position when earthingn switch is open 1 Operation Lever Insert Socket 2 Front Break 3 Undercarriage Position Interlock 4 Undercarriage and ES Interlock 5 Front Operation shaft 6 Back Break 7 Back Interlock Shaft 8 Back Door Interlock Fig 4 14 Earthing switch interlock VCB truck and Rear door 20 el Inspection and maintenance summary After the process of installation and testing the switchgear is available to use Timely and
16. ch busbar into the spout bushing and fix the fixed contact A Don t fasten the bolt initially when locking the fixed contact Please fasten by applying torque when the upper branch and main busbar lower branch and the current transformer are fixed Attention The torque will be different based on different sizes of the bolt and with without lubrication Corresponding torques of different bolts identified below 26 27 Recommend torgue N m Bolt size M8 26 ri ee Without lubrication oil With lubrication oil 10 ae pa FA M16 200 80 M20 300 120 e Tighten the bolt on the upper branch and main busbar Ensure that applied torque is 86 N m e Tighten the bolt of the lower branch busbar and the current transformer Ensure applied torque is 86 N m e Remove the inserted bolts on the driving mechanism of the shutter and then put down the shutters Inspection and replacement of the shutter mechanism In case of distortion or deformation the driving mechanism of the shutter shall be replaced The steps as follows e Remove the split pins of the driving mechanism of the shutters and connection bar see figure 6 5 e Screw off the bolt which is used to fix driving mechanism see figure 6 4 Earthing bar Split pins Bolt Figure 6 4 Driving mechanism of the shutter e Remove the 5 screws on the earthing bar then remove the earthing bar e Replace the 4 screws on the side plate o
17. e 4 fixing screws on the fixing bracket see figure 6 6 and then remove drive rod of the rear door interlock from rear door then draw out the drive rod backward A Attention Replace the bevel gear assembly and earthing switch in the same way Use care to avoid damage as the main body is much heavier e Unscrew both of the bolts on the bevel gear See figure 6 7 Fixed screw of the bevel gear Figure 6 7 Fixing screw of bevel gear Flexible connection of the earthing switch and earthing busbar Figure 6 8 Flexible cable between earthing Switch and earthing busbar e Unscrew the flexible connections between the earthing switch and common earthing busbar see figure 6 8 e Remove the fixing screw of the earthing switch and then push the bevel gear and the main body of the earthing switch See figure 6 9 e Now replacement can be done with the above instructions following the previous instructions in reverse order Remove 6 fixing screwso f the earthing switch Figure 6 9 Fixing screw of the earthing switch 28 29 Replacing the current transformer Replace the current transformer if the assembled current transformer cannot meet the function due to a change in the load conditions The steps are as follows A Confirm the equipment be powered off and make sure to follow proper safety measures Confirm the earthing switch is in OPEN position e Remove the back cover of the encl
18. equirement Safety Procedure e Wear safety uniform according to electric safety regulations before entering the site Environment protection requirements e Comply with industry work procedure Power supply shall be operated by authorized staff The manufacturer has a product recycle policy in accordance with related law and 15014001 Local laws shall be observed when the switchgear is due for recycle Handling and Storage Condition on delivery At the time of dispatch the factory assembled SecoGear will have withdrawable parts either securely locked in the service position or packed separately depending on the rating of the equipment transport mode and destination The SecoGear panels are verified in the factory for completeness as per order requirement and also passed routine testing as per IEC 62271 200 The busbars are not assembled they are packed separately with fasteners and accessories Packing Based on the kind of transportation and country of destination the packing may vary To protect against moisture a drying agent bag is provided IEC62271 1 2007 guidelines are followed Panels with basic or no packing Panels with seaworthy or similar packing including packing for containerized shipments o Sealed in polyethylene sheeting o Transport drying agent bags included o Moisture indicator included Observe the directions for use of the drying agent bags Note the following o Drying agent colo
19. er and the both side copper connections e Fix the bolt of the fixed contact of the earthing switch but do not fully tighten e Adjust the position of the fixed contact after switching the earthing switch in ON Position and then fasten e OPEN the earthing switch e Fasten the bolts on the copper connections and the current transformer mounting with a torque wrench at a torque of 86 N m e Fix the insulation shield and make sure it is in a vertical position e Connect the secondary connection of the CT and cover it according to the requirements e Assemble the back cover and compartment separating plate of switchgear Inspection and replacement of the Surge arrester It is necessary to replace the surge arrester based on big difference between reference voltage and the test data recorded on site during the maintenance and recording The steps are as follows Mounting bracket and earthing bar for arrester Figure 6 12 Installing surge arrester e Remove the cable between the arrester and copper connection See figure 6 12 e Remove the fixed bolts on both sides of the mounting bracket of the arrester e Push the three arresters and the bracket e Remove the fixed bolts on the mounting bracket of the arrester Figure 6 13 Surge arrester mounting plate e Install the new arrester and fasten the bolts with the mounting bracket e Screw both side bolts on the brackets e Fix the connection between the arrester and cop
20. ernal partitioning ensures safe access to the circuit breaker and cable compartment C even when the busbars are energized e The low voltage compartment D is fully protected from the high voltage area with the earthed steel sheet casing e On the end sides of the switchgear end cover plates are provided for consistent appearance as well as mechanical and thermal strength in case of internal arc fault in the end panel e Doors rear walls and cover plates are treated against corrosion and then coated with high quality paint The doors for circuit breaker and cable compartment are arc resistant with a mechanical interlock Switchgear structure 1 12 E Ww 11 Figure 3 2 Typical feeder panel A Main bus compartment B Breaker compartment C Cable compartment D Low voltage compartment o o 0 O o el H o o o o lo o o o ras o Figure 3 3 Incoming feeder panel 1250 2500A 1 Pressure relief plate 2 Enclosure 3 Cover of main busbar compartment can be removed 4 Branch busbar 5 Main busbar 6 Primary disconnect spouse 7 Primary disconnect 8 Current transfo
21. f the Wall Bushing Grading Ring Conductor Main Busbar threaded hole Cut off the heat shrinkable tube the surface side which close the conductor with the area of 30x30mm around the threaded hole See Figure 6 16 Threaded Hole M5 Figure 6 17 Spare parts The connection sequence as follows A Confirm the equipment be powered off and make sure to follow proper safety measures e One side of conductor is connected with wall bushing by using one screw M5x8 and a flat washer required torque is 5Nm e Another side of connecting conductor is connected with main busbar by using another screw M5X10 and a flat washer required torque is 5Nm e Replacement can be done with the above instructions following the previous instructions in reverse order Please refer to recommended spare parts list below Other spare parts are also available based on customer s requirement S N Name Unit Comments 1 Heater Piece mat a a e e a E a ere A ee ae ne ao n S Appendix A Onsite service safety instruction Before operating the equipment please check and make sure to follow all safety requirement If for any reason the work is interrupted please make sure site safety procedure is followed when restarting the work e Before operating please check site layout both inside and outside of the electrical operating area earthing line layout ON or OFF condition of the control power state of the tempor
22. f the shutter mechanism then remove the side plate e Remove the 6 screws which used to fix the shutter mechanism replace with the new parts of shutter mechanism e Now replacement can be done with the above instructions following the previous instructions in reverse order Replacing the earthing switch The replacing of the earthing switch includes changing the earthing switch along with labels for ON and OFF position the driving mechanism including driving gear assembly and drive rod The steps for replacement are as follows A e Rack out the circuit breaker Ensure switchgear is in Power OFF position and turn the earthing switch to the ON position e Remove the compartment separating plate e Remove the cover plate on the right side in the cable compartment Remove 6 fixing screws which used to fix the ES on the side sheet Remove 6 fixing screws Remove 4 fixing screws e Loosen the fastening screws on the drive rod but do not remove completely Both the screws can be accessed only when the A e Open the padlock on the operating hole of the earthing switch earthing switch is in OPEN position e Draw out the drive rod forward then the parts of the drive rod in the switchgear can be removed from backwards now Attention Don t fully remove the drive rod otherwise all A e Completely draw out the drive rod from another side at a the parts will fall out slight angle e Loosen th
23. ggi do 463 400 Korea T 82 31 620 6000 F 82 31 620 7070 Spain P I Clot del Tufau s n E 08295 Sant Vicenc de Castellet T 34 900 993 625 Belgium Nieuwevaart 51 B 9000 Gent T 32 0 9 265 21 11 Finland Kuortaneenkatu 2 FI 00510 Helsinki T 358 0 10 394 3760 France Paris Nord 2 13 rue de la Perdrix F 95958 Roissy CDG C dex T 33 0 800 912 816 Poland Ul Odrowaza 15 03 310 Warszawa T 48 22 519 76 00 and Ul Leszczynska 6 Bielsko Biata 43 300 T 48 33 828 62 33 Latin America Latin America 790 N W 107th Avenue Suite 200 Miami Fl 33172 USA T 1 305 5515155 Chile Vespucio Norte Avenida Presidente Eduardo Frei Montalva 6001 Edificio N 66 Comuna Conchal Sector el Cortijo Santiago T 56 2 928 4700 Italy Centro Direzionale Colleoni Via Paracelso 16 Palazzo Andromeda B1 20864 Agrate Brianza MB T 39 039 637 3701 Netherlands Parallelweg 10 NI 7482 CA Haaksbergen T 31 0 53 573 03 03 Germany Robert Bosch Str 2a 50354 H rth Efferen T 49 0 2233 9719 0 Portugal Rua Camilo Castelo Branco 805 Apartado 2770 4401 601 Vila Nova de Gaia T 351 22 374 60 00 Hungary Vaci ut 81 83 H 1139 Budapest T 36 1 447 6050 Brazil Av Maria Coelho Aguiar 215 Bloco C 6 Andar Jd Sdo Luiz 05804 900 Sdo Paulo T 55 11 36141900 Mexico Av Churubusco 3900 Nte Col Industrial Benito Judrez Monterrey N L 64517 T 01 800 800 1968 Russia 27
24. grease DE G51 for example on the surface after wiping It is important to check any abnormal condition such as the burning marks on the spout bushing which may be caused by the epoxy e Check and replace the fixed contact Verify the switchgear is de energized and the safety measures are in place Withdraw the circuit break Open the shutter mechanism and insert two M8 bolts into the overlapping holes on the shafts See figure 6 2 Then the fixed contact along with the spout bushing are visible Figure 6 2 shutter mechanism Inspect the contacts Replace the contact if the silver coating on copper is worn or the surface is corroded damaged or over heated Remove the bolts on the fixed contact and replace the fixed contact see figure 6 3 Replace the spout bushing Remove the bolt at the joint of the upper branch and main busbar Remove the bolt at the joint of the lower branch busbar and the current transformer Remove the center bolt of the fixed contact and then remove the vertical connections Silver plating fixed contact Fixing screws Front Rear Figure 6 3 Fixed contact and spout bushings e Remove four fixing screws M12 of the spout and then the spout can be removed see figure 6 3 e Replace the new spout bushing and fasten the fixing screws M12 Inject glass glue in the clearance between the spout bushing and the mounting metal frame e Insert the upper and lower bran
25. he busbar compartment or a loose bolted connection may result heated joint or even phase fault The procedure to change the main busbar is as follow A Verify the switchgear is de energized and the safety measures are in place e Remove the rear covers on the busbar compartment as well as the same on the adjacent panels Now the busbar is visible see figure 6 1 Figure 6 1 Busbar after opening the rear cover e Remove the pressure flap on the busbar compartment e Remove the busbar insulation shield e Remove the connection bolt on the main bar and branch busbar e Remove the busbar from the busbar compartment e Install the new main busbar and fasten the joints A e Cover the busbar joints with insulation shield Pay attention to the direction of the tapered washers and the bolted connection torque should reach 86 N m e Reassemble the pressure flaps and rear cover panels for the busbar compartment Inspection and replacement of the fixed contact and spout bushing It is normal to find the fixed contact surface oxidized due to current flow and environmental factors during period of service However if the surface becomes rusty due to wet or corrosive conditions the fixed contact must be replaced The spout bushing may be replaced depending of its condition Clean the contact with a cotton free paper and apply some pure alcohol if necessary Brush small amount of contact lubrication
26. he power must be shutdown before scheduled switchgear service and the work area must be isolated Measures must be taken to disallow the power being switched on Ensure proper earthing and padlocks in place Specially trained personnel are required to supervise The purpose for the service is to guarantee the operation quality of the switchgear and avoid any possible malfunctions This increases the life of the switchgear The scope of work is as follows e Inspection Determination of the actual condition e Servicing Measures to preserve the specified condition e Repair Measures to restore the specified condition The service interval for the switchgear depends on external factors including the operating environment the operation frequency and service age etc It is recommended to have switchgear serviced every 2 3 years if installed in good environment and not frequently operated It is recommended to have switchgear serviced every year If operated more than 10 times a month It is recommended to have switchgear serviced every half year if installed in adverse environment and frequently operated It is recommended to have the circuit breaker replaced if reached its mechanicall operating cycles or rated short circuit breaking times It is recommeded to inspect the circuit breaker every 6 AN months if in stand by for a significant period of time Repairs Immediate repairs are required in case of following si
27. hting impulse withstand voltage peak value in open condition of switch kVp The use of key interlocks is to realizing the interlocking logics between units of switchgear Also the functional truck can be locked in the racked out position and the relevant lock key can only be removed with the functional truck in disconnect position The earthing switch closing and opening operations can be locked by means of keys The latter can only be removed with the earthing switch in an opposed position to the lock to be made Description of the interlock system Key Condition a Key will be free when the truck in the disconnect position Functional truck racking in lock A sosen umwe f Key will be free when the Earthing switch is open Key E a El a AAA EQ rthing switch opening lock Key me will pe i fapped a es pe A arthing eres wa E e open p T noes Figure Functional truck racking in lock Key lock is locked key is free Truck indisconnect position Key lock can t be locked when truck in rack in position and key is trapped Figure 2 5 Earthing switch in open position When earthing switch in open position earthing switch can be locked by closing lock the key of closing lock can be free And opening lock can t be locked the key of opening lock is trapped Figure 2 6 Earthing switch in close position When earthing switch in close position earthing switch can be locked by opening lock the key of
28. ion sequence and ensure high quality standards site installation of the switchgear should only be carried out by specially trained or at least by supervised personnel and monitored by responsible persons On commencement of installation on site the switch room must be fundamentally finished provided with lighting and the electricity supply lockable dry and with facilities for ventilation It is also required that the basic frame and indoor ground for the switchgear should be checked and accepted before the construction It must be ensure that the ceiling height is sufficient for the opening travel of the pressure relief plates Tolerances for laying the floor frame are Evenness tolerance 1mm within a measuring length of 1m Straightness tolerance 1mm per 1m but not more than 3mm over entire length of frame Cross section view of switchgear room layout plan view 800 1900 2400 za 1800 lap Top Curface of basic frame 3 5mm above ground I Pedal tasi alo al TA Wai ET SA Dr EH Basic Frame E 140 ES Aly 250 50 5 07 HI ro cu Strap of control cable duct Figured steel plate t 5mm 300 1200 Control Cable Duct 250 250
29. ipping document e Notified to the relevant carrier or forwarding agent immediately in accordance with the relative liability regulations Note Always take photographs to document any major damage Intermediate storage Intermediate storage should follow the following practices to avoid any negative consequences Panels with basic packing or without packing Panels with seaworthy or similar packing with internal protective e Adry well ventilated storeroom with a climate in accordance covers with 1EC62271 1 2007 e Store the transport units e Store the panels upright a Protected from the weather e Do not stack panels b In a dry place Panels with basic packing c Safe from any damage e Open the packing at least partially Check the packing for damage Panels without packing Check the drying agent e Loosely covered with polythene d On arrival of the consignment e Ensure that there is sufficient air circulation e Subsequently at regular intervals Check regularly for any condensation during storage When the maximum storage period starting from the date of packing has been exceeded e The protective function of the packing can no longer be guaranteed e Take suitable action if intermediate storage needs to be continued A Warning Do not walk on the top of the panels due to rupture points in pressure relief devices The pressure relief devices can be damaged Installation of Switchgear In order to obtain an optimum installat
30. ngxian District Shanghai China 201401 T 86 21 6710 1888 F 86 216710 1901 Malaysia Level 6 1 Sentral Jalan Travers Kuala Lumpur Sentral Kuala Lumpur Malaysia 50470 T 603 2273 9788 F 603 2273 7988 Thailand 25th floor CRC Tower All Seasons Place 87 2 Wireless Road Lumpini Pathumwan Bangkok 10330 T 66 2 648 0240 F 66 2 648 0200 Philippines 8F Net Cube Building 30th Street Corner 3rd Avenue Crescent West Park Global City Taguig 1634 T 63 2877 7000 F 63 2 846 0629 Vietnam Saigon Centre Unit 1 Floor 7 Le Loi Boulevard District 1 HoChiMinh City T 84 8 3914 6700 F 84 8 3827 8229 Indonesia BRI II Tower 27th floor Jl Jend Sudirman No 44 46 Jakarta 10210 T 62 21 573 0430 F 62 21 574 7089 Singapore 240 Tanjong Pagar Road 06 00 GE Tower Singapore 088540 T 65 6326 3718 F 65 6326 3015 India India Polt No 42 1 amp 45 14 Electronic City Phase II Bangalore 560100 T 080 41434000 F 080 41434199 Australia amp New Zealand Australia 125 127 Long Street Smithfield Sydney NSW 2164 T 61 2 8788 6911 F 61 2 8788 7224 New Zealand Level 1 8 Tangihua Street Auckland North Island T 649 353 6706 F 64 9 353 6707 North Asia Japan 11F Akasaka Park Bldg 5 2 20 Akasaka Minato ku Tokyo 107 6111 T 81 3 3588 5288 F 81 3 3585 3010 Europe amp Middle East Korea 22 Daewangpangyo ro 712 beon gil Bundang gu Seongnam si Gyeon
31. o operation position in reverse order Move the Circuit Breaker from switchgear compartment to transfer truck Perform the operating steps for moving the Circuit Breaker truck from transfer truck into the switchgear in reverse order Circuit breaker For operating instructions refer to the Circuit Breaker instruction manual Earthing switch operation The earthing switch has a rapid close open mechanism which is independent to the rotation speed of the earth switch drive shaft The closing brake function can be quickly applied through the rapid close brake mechanism The earthing switch circuit breaker truck and rear cover behind the panel have a closedown device to prevent incorrect operation The earthing switch can be operated only when the truck is in disconnect test position and the rear cover of the switchgear is in the closed position The operating hole of the earthing switch located in the lower position of the right side in front of the panel See figure 4 8 18 19 The earthing switch has been interlocked with the rear cover of cable compartment and can be opened only when the cover is closed If found the operation of earthing switch become hard do not apply the excessive force This can cause damage to the parts Ensure the cover is properly secured and then operate the earthing switch Contact the manufacturer if the problem still exist Figure 4 8 Earthing switch operation warning
32. oltage Panel width Mas number of parallel cables Max cross section of cables Range of cable clamp Range of reducer ring kV mm per Phase mm mm mm 800 6 A a E 35 54 27 62 1000 6 NO Parts Description Cable clamp WA no eee Pp This cover has been interlocked with the earthing switch and can be opened only when the earthing switch is in closed position Earthing switch can be opened only when rear cover Figure 3 13 Cable compartment layout je closed Operations and trouble shooting Operations and trouble shooting Before start up the following work should be completed d b Q fa h Q Check the overall condition of the switchgear and clear any potential risk factor Check the switch truck isolated contactor and insulating parts etc by visual inspection Check the connection between earthing bus bar and earthing conductor of the transformer substation outside the compartment is secure Remove all of the remaining materials unnecessary objects and tools inside of the compartment Wipe the compartment body and the insulation parts with a soft cloth that should be clean and dry Then wipe off any remaining dust and grease Clean the surface of earthing busbar The earthing loop resistance should be less than 350 micro ohms Re install the cover removed during the period of installation wiring and commissioning A Warning a
33. on manual and respect the rules for good engineering practice e Hazardous voltage can cause electrical shocks and burns e Disconnect power then earth and short circuit before proceeding with any work on the equipment If you have any further questions about this instruction manual our field team will be pleased to provide the required information GE Energy reserve all rights to this publication We do not accept any responsibility for the information provided which is subject to alternation General Summary This publication contains the information required for installation commissioning operation and maintenance of SecoGear SecoGear is three phase metal enclosed air insulated factory assembled switchgear SecoGear is type tested and suitable for indoor applications up to 27 kV The panel is designed with withdrawable modules and is fitted with a single busbar system The withdrawable parts are equipped with circuit breakers voltage transformers fuses or current transformers Details of the technical design and configuration of individual Standard and Specification switchgear such as the technical data detailed part lists for the individual panels and comprehensive circuit documentation etc can be found in the relevant order documents For correct usage of the switchgear please read this manual carefully It is always advisable to use the manual for all operations regarding installation commissi
34. oning operation and maintenance of SecoGear air insulated switchgear These instructions are also used as references for personnel to carry on regularly maintenance of the switchgear e SecoGear complies with the standards and specifications for factory assembled metal enclosed and type tested high voltage switchgears to IEC publications as given below IEC62271 100 2008 High voltage alternating current circuit breakers IEC62271 200 2003 AC Metal enclosed switchgear and control gear for rated voltages above 1kV and up to 52kV IEC62271 102 2001 High voltage alternating current Disconnector and Earthing Switches IEC62271 1 2007 The common specification for high voltage switchgear and control gear simple Standards IEC60529 1989 Degrees of protection as provided by enclosures IP Code The switchgear has the following degrees of protection IP 4X applies for the enclosure and IP 2X applies for the partitions All other corresponding IEC publications national or local safety regulations must be followed during the installation and operation of the switchgear In addition any project specific advice from GE must be considered Operating Conditions Normal operating conditions The switchgear is fundamentally designed for the normal service conditions for indoor switchgear to IEC Publication 62271 1 2007 The following limitations apply If there are others we should detailthe limitations e Ambient temperature M
35. opening lock can be free And closing lock can t be locked the key of closing lock is trapped Padlock Optional Padlock for Circuit breaker racking in out operation Padlock for Circuit breaker racking in out operation will limit the access to insert crank lever to racking in out Circuit breaker Racking in out operation can be done only when lock cover is in the open position Lock position Open position Figure 2 9 Padlock for Circuit breaker racking in out operation Padlock for earthing switch operation Padlock for earthing switch operation will limit the access to inserting the operation lever to operate earthing switch Open close button can be operated only when the lock cover is in the open position Cover in open position Cover in lock position Figure 2 8 Padlock for earthing switch operation 10 11 Enclosure design and equipment Typical modules Figures 3 1 With withdrawable type SecoVac VB2 Plus Vacuum Circuit Breaker installed SecoGear panels are used for incoming or outgoing feeder Each unit consists of three high voltage compartments Main bus bar Circuit breaker Cable compartment and one Low voltage compartment for instruments and auxiliary circuits For busbar sectionalizing two panels are necessary the coupling panel with the withdrawable circuit breaker part and a bus riser panel available with busbar metering and earthing In equipment without busbar sectionalizing a direct bar
36. osure e Remove the connection bolt between the current transformer and the vertical copper connections See figure 6 10 Copper p connections Figure 6 10 Connection busbar between current transformer and earthing switch e Remove the secondary wires of the current transformer e Remove the 6 pcs of M8 bolts on the mounting plate of the current transformer A Attention The weight is heavy because of the current transformer installed in the mounting plate It is necessary to hold the mounting plate of the current transformer to avoid the damage for the equipment and personnel if the mounting plate drops down after loosening the bolt 3 pcs of M8 bolts on each side Figure 6 11 Mounting plate of the current transformer e Support the mounting plate of the current transformer and then put on the ground e Remove the four bolts which are used to fix the current transformer and remove the current transformer e Replace the current transformer with new one and screw on with the four bolts A Ensure the marking on the mounting plate for the installing position of the current transformer before removing the four bolts to avoid the wrong position with the hole of the copper connections after installing the new current transformer e Assemble the current transformer in its place on mounting plate and tighten the mounting plate by tightening the 10 pcs of M8 bolts e Screw on the bolts on the current transform
37. p 1250A Branch Busbar Rectangle 2500A Connection mode of Main Busbar Branch Busbar e Main Busbar and Branch Busbar 1 Main busbar 5 Branch busbar 2 Wall bushing 6 Insulation Cover 7 Support insulator 8 Spout 3 Support pad 4 Main Busbar amp Branch Busbar joint insulation boot Connection mode of Main Busbar and Grading ring In order to better protect the wall bushing it is necessary to add a grading ring in the wall bushing to balance the voltage between the wall bushing and main busbar So the grading ring and the main busbar should be connected before doing the routine tests and installation of the Switchgear in the field As the grading ring is casted into the wall bushing the wall bushing and the main busbar should be connected by conductor Here choose connect the bushing and the main busbar on the outward side of the switchgear for convenience of the connection See Figure 6 16 Before the connection of grading ring and main busbar make sure the through threaded hole M5 on the centerline of main busbar which close the conductor have already tapped according to the length of the conductor The length between the two hole s center of the conductor is 200mm The distance between the center of threaded hole and the outer surface of the wall bushing is 150mm See Figure 6 17 Busbar type Main Cross section copper 80x10x1 oz antes 120X8x2 Figure 6 17 Position o
38. per connection Inspection and replacement of potential indicator If the display Lock on the potential indicator is flashing and an abnormal sound from the relay is continuously heard there may be two reasons that can cause this problem First there may be a problem with the potential indicator contact Second the display itself may have a fault despite three phase power condition Both of these situations demand to replace the display The steps are as follows Lock indicator Test push button Three phase charged display Figure 6 14 Potential indicator There are two types potential indicators One is with latching contact and another is without the latching contact The replacement of the two types are the same See figure 6 14 e Cut off the auxiliary power of potential indicator if any e Disconnect all the connection from the back of the indicator e Remove the lock of the potential indicator and then push it out See figure 6 15 e Replace with the new one and fix the lock e Reconnect the wires at back e Recover the auxiliary power Lock to fix of the potential indicator All connection on the jointing row Figure 6 15 Removing and installing for the potential indicator 30 Si Main Busbar Rule and Note Every 3 4 panels use one Main Busbar The maximum length of Main Busbar should be less than 4m Below is a table indicating Busbar sizing Rated current Main Busbar am
39. proper maintenance can keep the switchgear trouble free and can prolong the life of the switchgear as long as possible The maintenance work must be carried out by certified persons who are familiar with the related operations of the switchgear and understand relevant IEC and other local safety rules and important guides established by other technical departments as well Allow a GE representative to assist when the switchgear and its components need to be repaired Users should think about the operating environment and the operation frequency when developing maintenance rules Usually the inspection of some equipment components such as wearable parts and the maintenance intervals maintenance period depend on the running time operating frequency and the number of short circuit cycles The maintenance period of other parts depends on the working situation the degree of the load and environmental impact including pollution and corrosive gasses Inspection and maintenance interval The maintenance interval determined by operating conditions of the switchgear depends on the operating mode the operating number of rated current and short circuit current environment temperature and pollution The recommending maintenance interval is showed in the following table according to the operation cycle of circuit breaker maintenance content _ interval years inspection care and maintenance 5000 1 Recommended shorter
40. r observed blue indicates the packaged equipment is dry condition o Drying agent color observed pink indicates the packaging contains moisture relative humidity above 40 Please contact the manufacturer in this case before installation Transport The transport units normally comprise of individual panels and in exceptional cases small groups of panels The panels are equipped with four 4 lifting eyebolts Only carry out loading operations when all precautionary measures to protect personnel and materials have been taken with the following equipment e Crane of suitable capacity the minimum capacity shall be 2 tonnes e Fork lift truck and or manual trolley e Lifting ropes slings of appropriate load capacity with shackles e Maintain an angle of atleast 60 from the front for the ropes leading to the crane hook Figure 1 1 HANG THE UNITS USING ALL 4 EYEBOLTS Figure 1 1 Handling by crane 1 Lifting eyebolts qty 4 Upon Receipt The responsibilities of the consignee when the switchgear arrives at the site include but are not limited to the following Check the consignment is complete and without damage e g look for any adverse effect caused by moisture In case of doubt the packing must be opened and then properly resealed with new drying agent bags when intermediate storage is necessary If any quantities are short or defects or transport damage is noted these must be e Documented on the respective sh
41. rcuit break for five times and check the circuit e Check all the interlocking mechanism e Electrical test including power frequency withstand test CT VT ratio and the contact resistance for the circuit break e Verify mechanical characteristics of the circuit break 24 25 Major Repairs and examples A Open the main busbar compartment and check the tightening Be sure to comply with the applicable safety regulations when carrying out repairs torques for the busbar bolted connections Check the main busbar and branch busbar for any dampness or rust Check all the sidewalls for any dampness or rust Check the main busbar compartment for any unexpected object Restore the insulation shield and the pressure flap on the top of the panel Check the fitness of the fixed contact and the surface condition Open the cable compartment and check the cable connection as wells as the connectors for color distortion Check the sealing condition of through holes for the primary and secondary cables Check the heater condition Check the breaker and cable compartment for unexpected objects Check the secondary connections of the CTs Check the current terminals in the low voltage compartment for the close loop of the secondary current circuit Check the protection relay ammeter energy meter etc on the CT secondary are in service Inspection and replacement of the main busbar Unexpected objects in t
42. rmer 9 Earthing switch 10 Rear door interlock 11 Bottom plate 12 Partition between breaker compartment and busbar compartment 13 Terminal block 14 Control plug 15 Shutter 16 Vacuum circuit breaker 17 Drive screw 18 Earthing switch operation mechanism 19 Control wire duct 20 Main earthing busbar es e ee YA Figure 3 4 Incoming With fix VT panel 1250 2500A 12 zi 3 co e eso S c e eso co e oo ag oloo e esco lote oO D _ a ololo O Ln N 4 0 C O o u 0 Y oc Co lt N n TEE er 5 z D Oloo o Q o m un o o nee 5 Figure 3 8 VT Panel 2500A x O Yo gt a a N de NS o a 7 S a We o N r e esco lol qee e o olole 09 4 O A le Cc oo a O l is i O o o i oO e es e e jaj e e e O E i KO 2 ji i 7 a pue 7 Sy TY ced stew
43. ts to ensure smooth operation b Place the Circuit Breaker on transfer truck and put in lock position See figure 4 1 VCB locked on the transfer truck Figure 4 1 VCB truck on the transfer truck c Move the transfer truck to the front of the switchgear turn the adjusting nut to adjust the height of the transfer truck platform See figure 4 2 Aim the guiding pin at the guiding jack in front of the switchgear push and make the transfer truck engage with the switchgear by using the lock key At the same time insert the front guide rail of the transfer truck into the bottom guide rail groove of the switchgear truck See figure 4 3 Figure 4 3 Lock VCB in Figure 4 2 Transfer truck lock with switchgear switchgear A Warning The trolley has four 4 nuts for adjusting the platform to the same level of the breaker compartment d Push the two sliding cranks inward under the truck to remove the locked position with the transfer truck and then push the truck forward to make it enter the switchgear compartment and lock it in the disconnect test position See figure 4 4 e Operate the lock key releasing lever of the transfer truck to Figure 4 4 Lock VCB in switchgear remove the locked relation between the transfer truck and the switchgear and then remove the transfer truck Move the truck from disconnect test position to service position a Make sure the front and back door of the s
44. tuation emerges e Deteriorated insulation discharges flashover and breakdown e Damaged component in the switchgear e Any other abnormal observation which may affect safety Inspection Items Check all the compartments and internal components for dampness rust and dirt Check the tightening torques of the busbar bolted connections on selected samples Remove the pressure flaps on the busbar compartment and remove the insulation shield See fig 5 2 Check the torque is 86 N m using a torque wrench Insulation Insulation shield shield for side Middle panel panel Figure 5 2 Main busbar shield Need to be replaced Performance test Check the fixed contact including its profile for any sign of sparking or wear and tear Check the shutter mechanism in the circuit breaker compartment Check the interlocking between the circuit breaker and the earthing switch Check the bolted connection between the power cable connectors and lugs Check earthing switch operation Check the interlocking between the earthing switch and the cable compartment door Check the interlocking between the circuit breaker and the breaker compartment door Check live voltage indications Check the heater If installed Performance test is to validate the electrical performance of the switchgear It is recommended to be carried out together with the scheduled service Performance test includes e Close and open the ci
45. witchgear are closed Make sure the earthing switch Is in the open position the circuit breaker compartment is clear and without any unexpected object b Insert the secondary plug of the truck into the socket on the topside of the switchgear truck compartment and put into the lock position See figure 4 5 amp 4 6 Figure 4 5 Take off secondary plug from truck Figure 4 6 Put the secondary a ee plug into switchgear socket c Make sure the circuit breaker is in the open position d Insert the racking crank of the truck into the rectangular cranking hole of the screw mechanism of the truck through the operation hole under the door of the circuit breaker compartment See figure 4 7 Figure 4 7 Rack in the breaker to work position e Turn the crank clockwise approximately 20 turns until it can t be moved any more listen for a strong cranking sound when the breaker changes into the operating position f The position indicator on the door of the low voltage compartment shows the breaker is in service position g Take off the racking crank The racking operation is now complete A Warning The truck is not allowed to be placed in any intermediate position between disconnect test position and operating position Move the Circuit Breaker from service position to test position a Make sure the circuit breaker is in open position b Perform the operating steps for moving the Circuit Breaker int
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