User manual KYN 28A24(Z)

Power Transmission & Distribution KYN28A-24(Z) Metal-clad movable type metal-enclosed switchgear Installation and Instruction Manual 2010CT0302EN General Types and Meanings Service Conditions Main Technical Parameters Structural Characteristics of product Wiring scheme of main circuit Exterior installation dimensions Installation and debugging 11 Use and maintenance 12 10 Attentions in maintenance of switchgear cabinet 15 11 Transportation and storage 15 12 Attached documents and spare parts 16 13 After service 16 KYN28A-24(Z) Metal-clad movable type metal-enclosed switchgear General KYN28A-24(Z) Metal-clad movable type metal-enclosed switchgear ( hereinafter referred to as "the switchgear" ) is a complete power distribution equipment with 20 kV three-phase AC 50 (60) Hz single busbar and single busbar segment system It is mainly used in the power transmission of power plant and medium and small scale power generator, power distribution of industrial mining corporations, power acceptance and transmission of secondary substation, and the startup of large scale high-voltage power generator to protect and monitor the system The switchgear is provided with five interlocking protective functions to protect from pushing and pulling breaker handcart with charge, to protect from turning the breaker on and off by mistake, to protect from turning off the breaker when the grounding switch is off, to protect from entering the charged compartment by mistake and to protect from turning on the grounding switch with charge by mistake It can be used together with the NV1-24 vacuum breaker developed by our company alone It is really an excellent distribution equipment The product conforms to the standards of GB 3906-2006 (IEC 62271-200, MOD), GB/T 11022-1999 (IEC 60694-1996, MOD) and IEC 60298 Types and Meanings K Y N □ － 24 (Z) / □－□ □ □ Environmental characteristic Number of scheme Rated short-circuit breaking current Rated current Vacuum breaker Rated voltage Design number For indoor use Movable Metal-clad Service Conditions 3.1 Ambient temperature: - 15℃～+40℃ 3.2 Altitude: no higher than 1000 m 3.3 Relative humidity: mean daily relative humidity should not be higher than 95%, mean monthly relative humidity not be higher than 90% 3.4 Seismic intensity: generally not above 3.5 To be put in the places without fire, explosive risk, serious dirt, chemical corrosion and great vibration 3.6 When the switchgear is used in the conditions other than the normal conditions specified by GB3906, please contact us P1 Power Transmission & Distribution Main technical parameters Table No Name Rated voltage power-frequency withstand voltage Rated impulse withstand current (peak) Rated frequency Rated current Rated current of branch busbar Rated short-time withstand current Rated peak withstand current Rated short-circuit duration 10 Unit kV kV Hz 125 50(60) kV A 630、1250、1600、2000、2500、3150 A 630、1250、1600、2000、2500、3150 kA 16、20、25、31.5 kA s 40、50、63、80 Degree of protection kg 11 Weight Data 24 (50)65 IP4X for outer shell, IP2X when compartment door and breaker compartment door is open 1000 Structural Characteristics of product 5.1 Safe structure and flexible installation The switchgear is composed of cabinet and central movable part (i e handcart) The cabinet is composed of four independent compartments The protection degree of the outer shell is IP4X When the door of the breaker compartment is open, the protection degree is IP2X There are overhead inlet and outlet wires, cable inlet and outlet wires and other functional schemes It can form various distribution equipments through arrangement and combination You can debug and maintain the switchgear with the cable compartment, which improves the safety and flexibility of the switchgear and reduces the covering area Figure Structure of the switchgear KYN -24(Z) A A A 10 B D A 11 12 2300 13 C 14 15 1000 Depth of cabinet (mm) P2 D Cable outlet wire Overhead inlet and outlet wire A Busbar compartment B Breaker compartment C Cable compartment D Relay compartment Wall sleeve Analog primary figure Nameplate Lighting Main busbar Contact box Current transformer Primary cable Grounding busbar 10 Secondary interlocking equipment 11 Valve mechanism 12 breaker handcart 13 Insulator 14 Heater 15 Grounding switch 1820 2150 5.2 Handcart The frame of the handcart is composed of light steel plate processed by CNC machine and assembled The handcart is insulated from the cabinet The mechanical interlocking is safe, reliable and flexible According to the purpose, the handcarts can be divided into breaker handcart, voltage transformer handcart, measuring handcart and separating handcart The handcarts with the same type can be completely exchanged The handcarts have testing positions and working positions in the cabinet Each position is provided with positioning device to guarantee the reliable interlocking It must be operated in the interlocking protection process The handcarts are all pushed and pulled with lead screw It is easy and flexible to operate and suitable for the operation of various operators When the handcart is to separate from the cabinet, a small size special transfer trolley will be used to make it easy to perform inspection and maintenance There are vacuum breakers and other supporting equipments on the breaker handcart When the transfer trolley for the handcart enters the breaker compartment of the cabinet, it can be reliably locked in the off position (testing position) Meanwhile, turn on the secondary circuit, and the indicator of handcart position will show the position of the handcart And only after complete locking, can the mechanism be pushed and the handcart be pushed to the working position When the handcart reaches the working position, the handle cannot be pushed, and the corresponding indicator of position will show the position The mechanical interlocking function of the handcart can reliably make sure that the breaker can be turned on only when the handcart is in the working position or testing position (exit position), and the handcart can move only when the breaker is in the off position 5.3 Compartment The main electric elements of the switchgear are all in the independent compartments, that is, breaker handcart compartment, busbar compartment, cable compartment and relay instrument compartment The protection degree of the compartments is IP2X Except the relay compartment, the other three compartments are all provided with pressure relief passage As the central embedding form is used, the passage for equipment maintenance is added, and more positions of cable compartment are needed, so the equipment can connect multiple cables 5.3.1 Breaker compartment B Figure Valve mechanism Rails are installed at both sides of the compartments to make it easy for the handcart 17 to move from the breaking position/testing position to the working position in the cabinet The static contact box and separating board 19 (valve) are installed on the rear wall of the rear handcart compartment When the handcart moves from the breaking position to the working position, the valve of the upper and lower static contact box will link with the handcart can open automatically When the handcart moves in the counter direction, the valve will be closed automatically Till the handcart goes back to a certain position and cover the static contact box completely, it is effectively separated Meanwhile, as the upper and lower valves not link with each other, the valve at the charged side can be locked in maintenance to make sure that the maintainer will not contact the charged members (See figure 2) When the breaker compartment is closed, the handcart can still be operated The position of handcart, indication of on and off position, and the energy storage can be observed from the excess panel of the upper door 5.3.2 Busbar compartment A The main busbars connect and link with each other They are fixed with sleeve and static contact box The main busbars and linkage busbars are the busbars with rectangle sections When carrying large current load, two combined busbars are used The branch busbars are connected to the static contact box and the main busbars with bolts, and no other supports are needed For special requirements, the busbars are covered with thermal shrinkage box and connecting end face insulating cover (See figure 3) The busbars of adjacent cabinets are fixed with sleeve Then the air buffer retained between the connecting busbars will protect it from melting when the internal fault arc occurs The sleeve can effectively separate the fault and prevent it from spreading P3 Power Transmission & Distribution Figure The connecting form of busbar and branch busbar and installation form ofthermal shrinkage sleeve and insulating cover Thermal shrinkage sleeve Insulating cover 5.3.3 Cable compartment C The switchgear is of the central embedding form, so the space of cable compartment is large The current transformer and grounding switch is installed on the rear wall of the compartment Move the handcart 17 and movable central separating board 15 (See figure 4), and the constructor can install and maintain the equipment from the front The cable connecting conductor in the cable compartment can be connected to 1~3 single-core cables for each phase according to the scale of the current It can be connected to single-core cable for each phase when necessary The cabinet bottom of the connecting cables is provided with slitting removable metal clad or non magnetic conducting metal clad and rubber seal cover for sealing the cable so as to make it easy, safe and reliable to construct 5.3.4 Relay instrument compartment The relay instrument compartment can be installed with relay protective elements, instruments, electric indicators and secondary equipments for special requirements The control wires are laid in the wire duct with enough space, and the metal cover is equipped to separate the secondary wires from the high voltage compartment The left wire duct is preformed for leading in and out the control string cables The string cables inside the switch cabinet are laid at the left The through holes for little busbars easy for construction are also preformed on the top board of the relay compartment When connecting the wires, the top cover of instrument compartment can be turned over to make it easy to install the little busbars 5.4 Interlocking device to prevent from mishandling The safe and reliable interlocking device is installed in the switchgear to satisfy requirements of the five protective functions 5.4.1 The indicative button or KK type switch is installed on the instrument compartment to prevent from turning on and off the breaker by mistake 5.4.2 The breaker can be turned on and off only when the handcart of the breaker is in the testing or working position And after the breaker is turned on, the handcart can not be moved to prevent from pushing and pulling the breaker with charge by mistake 5.4.3 The breaker handcart can move from the testing / breaking position to the working position only when the grounding switch is in the off position The grounding switch can be turned on only when the breaker handcart is in the testing / breaking position (the grounding switch can be provided with indication device) In such way, it can prevent from turning on the grounding switch with charge by mistake and turning on the breaker when the grounding switch is on 5.4.4 When the grounding switch is off, the lower door and rear clad can not be opened to prevent from entering the charged compartment by mistake (Figure 5) P4 Figure Removing method of horizontal clad Figure Interlocking of grounding switch and rear clad Figure Interlocking mechanism of secondary plug-in units 5.4.5 Besides, latching electromagnet should be installed in the handcart according to the requirement so that it can only turn on the switch manually but not turn off the switch when there is no control voltage 5.4.6 When the breaker handcart is in the working position, the secondary plug (figure 6) will be locked and cannot be removed 5.4.7 The electric interlocking device can be installed in the cabinets The electromagnetic locking device can be installed in the operating mechanism of grounding switch in the present switchgear to enhance the reliability The order can be chosen according to the requirement of the user 5.5 Pressure relief device There are pressure relief devices above the breaker handcart compartment, busbar compartment and cable compartment When the breaker or busbar has internal arcing fault, the internal pressure of the cabinet will increase with the arc The special seal ring installed on the door will close the cabinet in the front, and the pressure relief metal board installed on the top will be opened automatically to relieve pressure and discharge gas so as to guarantee the safety of operator and cabinet 5.6 Position interlocking of secondary plug and handcart The connection between the secondary wire on the switchgear and the secondary wire of the breaker handcart is realized with the manual secondary plug The dynamic contact of the secondary plug is connected to the breaker handcart with a nylon expansion bellows The secondary static contact seat is installed in the right upper part of the handcart compartment of the cabinet The secondary plug can be plugged in and removed only when the breaker handcart is in the testing / breaking position When the breaker handcart is in the working position, the secondary plug is locked and cannot be removed due to the mechanical interlocking Besides, the closing latching electromagnetic lock can be installed according to requirement so that the closing mechanism of the breaker handcart will be locked by the electromagnet The breaker handcart can only be turned off but not turned on before turning on the secondary plug 5.7 Electric indication device If it is required by the user, an electric indication device can be installed in the cabinet to inspect the operating condition of the primary circuit The device is composed of the high-voltage sensor and portable indicator, integrated with conducting wire The device can not only indicate whether the high-voltage circuit is charged but also realize the forced latching with the electromagnetic lock so as to prevent from turning off the grounding switch with charge and entering the charged compartment by mistake, thus enhancing the mistake-proofing performance of the supporting products P5 Power Transmission & Distribution 5.8 Condensation prevention In order to prevent the risk of condensation in the environment with high humidity or great variation of temperature, heaters are installed in the breaker and cable compartments respectively to prevent condensation The temperature and condensation monitoring sensing device can also be installed along with the heater to realize automatic monitoring 5.9 Grounding device The primary grounding copper busbar of corresponding specification is installed independently in the cable compartment This busbar can get through all the adjacent cabinets and well contact with the cabinet The grounding busbar is used by the direct grounding elements Moreover, as the whole cabinet is jointed with aluzinc or steel plate, the whole cabinet is in the good grounding condition to guarantee the safety of the operators contacting the cabinet Wiring scheme of main circuit No of scheme 001 003 004 1000X1820X2300 1000X1820X2300 1000X1820X2300 1000X1820X2300 2~3 1 2~3 2~3 Power receiving and feeding Power receiving and feeding Power receiving and feeding Scheme figure of primary circuit 002 Main electric elements Dimensions of cabinet (width x depth x height) mm Rated current (A) Vacuum breaker Current transformer 2~3 Voltage transformer High-voltage fuse Grounding switch Arrester Purpose Remarks P6 630~3150A Power receiving and feeding No of scheme 005 006 007 008 Scheme figure of primary circuit Main electric elements Dimensions of cabinet (width x depth x height) mm Rated current (A) 1000X1820X2300 1000X1820X2300 1000X1820X2300 Vacuum breaker 1 Current transformer Voltage transformer 3 High-voltage fuse Grounding switch Arrester Purpose 3 1000X1820X2300 630~3150A Power receiving and feeding Power receiving and feeding Power receiving and feeding Separation Remarks No of scheme 009 011 012 1000X1820X2300 1000X1820X2300 1000X1820X2300 Scheme figure of primary circuit 010 Main electric elements Dimensions of cabinet (width x depth x height) mm Rated current (A) 630~3150A Vacuum breaker Current transformer Voltage transformer High-voltage fuse Grounding switch Arrester Purpose Remarks P7 1000X1820X2300 2~3 Separation of busbar couple Measuring voltage 3 2~3 3 Measuring voltage Measuring voltage Power Transmission & Distribution No of scheme 013 014 015 016 Scheme figure of primary circuit Main electric elements Dimensions of cabinet (width x depth x height) mm Rated current (A) 1000X1820X2300 1000X1820X2300 1000X1820X2300 1000X1820X2300 630~3150A Vacuum breaker Current transformer Voltage transformer High-voltage fuse Grounding switch Arrester Purpose 3 Measuring + connecting Fuse 3 3 3 Measuring + connecting Measuring + connecting Remarks No of scheme 017 018 019 020 Scheme figure of primary circuit 1000X1820X2300 1000X1820X2300 Vacuum breaker 2~3 Main electric elements Dimensions of cabinet (width x depth x height) mm Rated current (A) Current transformer Voltage transformer High-voltage fuse Grounding switch Arrester Purpose Remarks P8 1000X1820X2300 1000X1820X2300 630~3150A 2~3 3 3 3 Connecting Connecting Connecting + measuring Connecting + measuring 021 No of scheme 022 023 024 Scheme figure of primary circuit Main electric elements Dimensions of cabinet (width x depth x height) mm Rated current (A) Vacuum breaker Current transformer Voltage transformer High-voltage fuse Grounding switch Arrester Purpose 1000X2150X2300 1000X2150X2300 2~3 630~3150A 3 Connecting Overhead inlet wire Remarks Exterior installation dimensions Exterior dimensions L H W Height H (mm) Width W (mm) Length L (mm) P9 Cable outlet wire Overhead inlet and outlet wire 2300 1000 1820 2150 Power Transmission & Distribution Installation dimension figure 20 A N L3 L3 450 C L1 B A 200 M Install foundation of steel channel (overlook) Secondary cable hole 45X220 switch panel 740 4-14X24 Foundation installation hole 740 4- 14 Backing welding nut M10 B L R20 30 L2 Dimension figure of bottom plate of switchgear (overlook) Notes: 1.Depth of cable trench ≥ 1200 mm preferred 2.Steel channels A and B in the foundation figure (8#) extrude from the ground by 1~3 mm Figure Installation foundation figure of the product Main cable trench 730 A-A rotation The equipment is not installed against the wall 1~3 A L 1200 Behind the cabinet M A-A rotation The equipment is installed against the wall 1000 100 A 1200 300 200 View in direction C Unit of dimensions: mm Width of Depth of L M N L1 Cabinet A Cabinet B 1820 1770 1000 830 1000 730 2150 2100 P10 250 Behind the cabinet L2 L3 830 880 C 470 800 730 C向 Installation and debugging 8.1 Foundation type 8.1.1 The construction of the foundation of the switchgear should conform to the relevant provisions in the Code of Erection and Acceptance of Electric Power Construction Section 8.1.2 The foundation of switchgear should be casted concrete twice The first is the foundation for the installing member of the cabinet, i.e angle steel or square steel, channel steel member The second is the concrete supplementary course of the ground, generally 60 mm in depth When casting the concrete supplementary course, the height of concrete should be 1~3 mm lower than the surface of the member 8.1.3 See figure for the installation details of the foundation of the switchgear 8.2.2 When the cabinets are arranged in single line, it is preferred that the corridor in front of the cabinet should be 2.5 m, and when they are arranged in two lines, the corridor should be m 8.2.3 The switchgear should be transported to a specific position according to the engineering requirement and the indication in the figure If the switchgears are arranged in a long line (more than 10 sets), the splicing of the cabinets should be started from the central part 8.2.4 In the transportation of the switchgear, special tools should be used such as lifter and fork truck The roller and crowbar are prohibited 8.2.5 Loosen the bolts of the rear cover of the busbar compartment and remove the cover (see figure 8) If the bolts of the top cover of the burbar compartment are loosened, the removable pressure relief plate 21 will be removed (Install the nylon bolts for relieving pressure when assembling, see figure 9) Figure Closing plate of busbar compartment Figure Pressure relief cover and plastic bolts Nylon bolt 8.2.6 Loosen and remove the bottom cover 12 of the cable compartment 8.2.7 Remove the cover from the left control string cable trench of the switchgear 8.2.8 After that, install the cabinets one by one including horizontal and vertical aspects The unevenness of the cabinet should not be over mm 8.2.9 When the switchgears are completely combined (spliced), M12 foundation bolts can be used to connect them to the foundation frame or they can be fixed onto the foundation frame through welding 8.3 Installation of busbars The following steps should be followed 8.3.1 Clean the busbars with clean and dry soft cloth Check whether the insulating sleeve is damaged Paint conducting paste or neutral Vaseline at the connecting part 8.3.2 Install the busbars one cabinet by one cabinet Connect the busbar segment with the corresponding branch busbars Insert proper packing block when connecting and tighten with bolts See figure for the connection of primary busbars and branch busbars P11 Power Transmission & Distribution 8.4 Grounding device of the switchgear 8.4.1 Connect the grounding busbars 11 of the cabinets with the preset connecting plate (see figure 11) Figure 10 Left lower secondary protective plate Figure 11 Grounding busbar Secondary protective plate 8.4.2 Connect all the necessary grounding leads in the cabinet 8.4.3 Connect the foundation frame with the grounding busbar If more than 10 sets of cabinets are installed, more than two grounding busbars are needed 8.5 Inspection after the installation of switchgear 8.5.1 Check whether the main elements are damaged If any, stop operation and exchange the damaged element 8.5.2 Clear the dirt, especially on the insulating surface, as the dirt resulted from in the transportation process or storage process will influence the insulating performance of the product 8.5.3 Check whether any fixing bolt is loose and whether the connecting wires drop Especially, special hexagon spanner is needed for confirming whether all the static contacts (see figure 15) are tightened Check the connecting conditions of the circuits and the grounding members 8.5.4 Push the breaker handcart into the cabinet Manually operate the interlocking mechanism, energy storing, opening and closing devices Observe the energy storing condition, indication of opening and closing positions and whether the devices are in normal conditions Meanwhile, adjust the pointer of the instrument to zero position, and adjust the relay Check whether the secondary wiring is correct according to the wiring figure Use and maintenance 9.1 In the operation of the switchgear, the operator should also pay attention to the following problems besides the relevant specifications 9.1.1 Operation process Though the interlocking device to guarantee the correct operation process of all the parts of the switchgear is installed in the switchgear, the operator should still strictly follow the requirements in the operation specification and the present manual when turning on and off the parts of the switchgear The operator should not operate the switchgear at discretion and operate the switchgear by force when the operation is blocked, or it is likely to damage the equipment and result in accidents 9.1.1.1 Operation of the breaker cabinet without grounding switch (see figure 12) a Install the movable part of breaker into the cabinet: prepare to push the breaker handcart from outside to the front part inside the cabinet Check carefully whether the breaker is in good condition, whether any parts are missed and whether there are any foreign materials in the case or switchgear Put the handcart onto the trolley and lock it after no problem is confirmed Push the trolley to the front of the cabinet Lift the handcart to a proper position Insert the front positioning locking plate of the trolley into the central socket of the cabinet and lock the trolley onto the cabinet, and then open the locking hook of the breaker handcart and push it into the cabinet steadily and lock it When it is confirmed that the handcart has been locked to the cabinet well, unlock the trolley and the cabinet, and push away the trolley P12 Figure 12 Installation process of breaker Connecting handcart and cabinet Pushing in breaker Testing position Working position b Operation of handcart inside the cabinet: after the handcart is installed into the cabinet from the trolley, that is, it is in the testing / breaking position (exit position) in the cabinet, if you want to put the handcart into operation, put the handcart in the testing / breaking position first Plug in the plug of secondary circuit The indicator of the testing position on the panel of instrument compartment will be light when galvanized At that time, the electric operation test can be done on the handcart when the primary circuit is not turned on If you want to continue the operation, close all the cabinet doors first Insert the key into the lock hole and lock the door Make sure that the breaker is off Then insert the operation handle of the handcart into the operation hole on the central panel, and rotate the handle clockwise till the handle is blocked greatly and a silvery switching sound of the secondary switch is heard Meanwhile, the indicator of working position on the panel of instrument compartment is light Then remove the handle At that time, the primary circuit is turned on, and the breaker is in the working position The on and off operation can be performed through the control circuit If you want to exit the handcart from the working position, make sure that the breaker is in off position first Insert the operation handle of handcart, rotate the handle counter clockwise till the handle is blocked greatly and a silvery switching sound of the secondary switch is heard, ant then the handcart returns the testing position (exit position) Then the primary circuit is completely but off and the metal valve is closed c Get the handcart out of the cabinet: if you want to get the handcart out of the cabinet, make sure that the handcart is in the testing position first, and then remove the plug of secondary circuit and lock the dynamic plug on the handcart frame At that time, push the trolley to the front of the cabinet (at the same time when installing the handcart into the cabinet), and then unlock the handcart and pull it out When the handcart is completely in the trolley and locked, unlock the trolley from the cabinet Pull the trolley backward for a certain distance and stop it steadily If the handcart is to be transported by the trolley for a long distance, be careful when pushing the trolley to avoid accident in the transportation d Confirm the on and off condition of the breaker in the cabinet: the on and off condition of the breaker can be determined by the on and off indication plate on the panel of the breaker handcart and the on and off indicator on the panel of instrument compartment If the green off indication plate on the handcart panel is seen through the access panel on the central panel of the cabinet, it can be considered that the breaker is off At that time, if the plug of the secondary circuit is turned on, the off indicator on the instrument panel will be light If the red off indication plate on the handcart panel is seen through the access panel on the central panel of the cabinet, it can be considered that the breaker is on At that time, if the plug of the secondary circuit is turned on, the on indicator on the instrument panel will be light 9.1.1.2 Operation of breaker cabinet with grounding switch The process to push in the get out the handcart is the same as that of the breaker cabinet of grounding switch Only the items to which attention should be paid in the operation of handcart in the cabinet and the operation of grounding switch are described below P13 Power Transmission & Distribution a Operation of handcart in cabinet When you prepare to push the handcart into the working position, you should also confirm that the grounding switch is off besides the requirements in 9.1.1.1b, or the next operation can not be done b Turning on and off the grounding switch If you want to turn on the grounding switch, make sure that the handcart is in the testing / breaking position first and remove the handle Then push the interlocking bent plate at the operation hole of grounding switch, insert the handle of grounding switch, rotate it by 90° clockwise, and the grounding switch will be turned on If you rotate it by 90° counter clockwise after that, the grounding switch will be turned off 9.1.1.3 Operation of common separation cabinet The separation handcart is not provided with the ability to turning on and off the load current, so you should not push and pull the handcart when it is charged The separation handcart can be operated only when the secondary contact inside the breaker handcart cabinet is converted and the electric interlocking of the supporting separation handcart is unlocked The detailed operation process is the same as that of the breaker handcart 9.1.2 Attentions in use of interlocking 9.1.2.1 The interlocking function of the product is mainly the mechanical interlocking, supported by the electric interlocking It can realize the requirement of five protective functions of the switchgear However, the operators should not neglect the requirements of the operation specifications Only by combining the specifications and the technical measures can the protective function of the interlocking device be effectively realized and the mishandling accidents be avoided 9.1.2.2 The use and removal of the interlocking functions of the product are mainly realized in the normal operation process, and no additional processes are needed If it is found that the operated is blocked greatly (the resistance of operation increases), check whether there is any mishandling, but not keep operate by force to damage the equipment and even result in accidents due to mishandling 9.1.2.3 See figure 13 for the cases that emergency unlocking is needed for special requirements for some interlocking (such as the interlocking of lower panel of cabinet and grounding switch) Attentions should be paid to the use of the emergency unlocking It should not be used frequently Necessary protective measures should be taken when the emergency unlocking is used After the process, the interlocking should be returned to the original condition 9.2 The maintenance of switchgear cabinet should be performed according to the relevant specifications It is suggested that attentions should be paid to the following items 9.2.1 Check the condition of the breaker and perform necessary adjustment according to the requirement in the manual of vacuum breaker 9.2.2 Check the pushing mechanism of the handcart and the interlocking condition, making it satisfy the relevant requirements in the present manual 9.2.3 Check the condition of the contact of primary circuit Remove the old oil and grease on the dynamic and static contacts Check whether the contacts are damaged and the condition of the plum contact of breaker (see figure 14) Check whether the spring force is varied greatly and whether there is any abnormal oxidation of coating course due to too high temperature If any, deal with the problem immediately 9.2.4 Check whether the contact parts of secondary circuit are abnormal and perform necessary adjustment 9.2.5 Check the situation of the parts of the grounding circuit such as grounding contact, primary grounding, etc to guarantee the continuity of conduction 9.2.6 Check all the fastening pieces If there is any loose pieces, tighten them at once, especially the static contact and fastening pieces for busbars (see figure 15) P14 Figure 13 Emergency unlocking device of lower door Figure 14 Plum contact and tightening spring Figure 15 Fixing bolts of static contact 10 Attentions in maintenance of switchgear cabinet When maintaining the switchgear, the operator should pay attention to the following problems besides the relevant codes for maintenance 10.1 Check the relevant parameters of breaker The check on breaker should be performed in the off condition without storing energy 10.2 Check whether there is any abnormal condition in the pushing mechanism, driving mechanism and interlocking mechanisms 10.3 Check whether there is any damage in the contact of primary circuit and clean the old oil and grease on the contact 10.4 Check whether there is any abnormal condition in the plug-in units of secondary circuit 10.5 Check whether the grounding of the grounding points is reliable 10.6 Check whether there is any loose position among the connecting positions of the primary circuit 11 Transportation and storage Attentions should be paid to the following aspects in the transportation and storage of the switchgear 11.1.1 The switchgear has been assembled in the plant and the handcart is in the working position The door of the switchgear cabinet is closed The busbars, fastening pieces and accessories are in separate packages 11.1.2 The switchgear is transported erectly with the following tools: lifter, fork truck and manual lifting frame (see figure 16) 11.1.3 When the switchgear reaches the site, the receiver should finish the following jobs Invite the service engineer of our company to attend the open-case inspection Check whether the goods are complete and damaged, whether the mark and certificate of switchgear is correct and complete, and whether there is any instruction Record any shortage, defects and transportation damage carefully and notice the relevant department immediately Take a photo for the serious damage 11.2 Intermediate storage During the intermediate storage, the switchgear should be put in the places without damage on the switchgears and the installation materials The switchgears should be stored in the dry places with good ventilation The switchgears should be laid erectly separately Check whether any condensation is present at regular intervals before the installation of the switchgear P15 Power Transmission & Distribution Figure 16 Loading and unloading with lifter and fork truck Lifting ring Φ30 Lifting angle ≥60° Loading and unloading with lifter Loading and unloading with fork truck 12 Attached documents and spare parts 12.1 Certificate of compliance 12.2 Packing list 12.3 Report of factory inspection 12.4 Instruction manual for operation 12.5 List of equipments and spare parts 12.6 Drawing of primary system, drawing of secondary wiring, extension drawing of secondary principle 12.7 Handle of central handcart, handle of grounding switch, handle of energy storage, emergency unlocking spanner and trolley for central handcart (see figure 17) Figure 17 Tools Handles of grounding switch Handle of breaker Handles of energy storage 13 After service TEL: 021-67777777-83231021-67777777-83083 P16 Emergency unlocking spanner Trolley We assure you rapid, circumspect and professional service We hope to embrace any suggestion of the related new product and product innovation as well Address: International Trade Department 1255 Wenhe Road, Songjiang District Shanghai 201614, China Tel: (+86)-21-6777 7777 Fax: (+86)-21-6777 7777-83000 Http:// en.chintelectric.com E-mail:shouhou@chint.com The contents and data in this catalogue are for reference only The real order requirements and technical agreements shall prevail The catalogue is subject to change without further notice The latest edition is recommended CHINT reserves the right of interpretation  ... requirement in the manual of vacuum breaker 9.2.2 Check the pushing mechanism of the handcart and the interlocking condition, making it satisfy the relevant requirements in the present manual 9.2.3... switchgear to enhance the reliability The order can be chosen according to the requirement of the user 5.5 Pressure relief device There are pressure relief devices above the breaker handcart compartment,... secondary wire on the switchgear and the secondary wire of the breaker handcart is realized with the manual secondary plug The dynamic contact of the secondary plug is connected to the breaker handcart