Short Answer Questions:
1. What are the order of arrangement of the combination? How to choose?
Answer: According to the combination of arrangement diagram: there are two kinds of combination of the order of arrangement, one is called "S" shaped arrangement, the other is called segmental arrangement, both methods are from the outside of the station to the station from top to bottom arrangement of combinations. For the short throat of the station selection "S" shape arrangement, for the longer throat of the station selection of segmental arrangement.
2, how to prepare the chain diagram?
A: the preparation of the interlocking table, should be the main approach, the arrangement of the approach needs to press the button, protection of the approach to the name of the signaling machine and the display of the approach to the need for the location of the relevant turnout, track section, as well as the arrangement of the approach to the hostile signals and so on to fill in the project by project.
3, 6502 electrical centralized selection of parallel approach to the broken line law law is what?
Answer: the law of parallel approach disconnection is: (l), the priority turnouts on the left, to break the 1st network line or the 3rd network line KZ, skimming turnouts break the 1st network line, press-shaped turnouts break the 3rd network line. (2), when the priority turnoff is on the right side, break the KF of the 2nd network line or the 4th network line, the skimming-shaped turnoff breaks the 2nd network line, and the pressing-shaped turnoff breaks the 4th network line.
4, 6502 electrical centralized circuit in the LXJ slow release characteristics of what?
A: LXJ slow release characteristics have the following roles: (1) in the handling of manual unlocking, the use of LXJ slow release, so that the XJJ3-4 coil to check the conditions of the power supply KZ-RJ-H power before re-excitation is permitted to ensure that manual unlocking of the delay time. (2) When the main and auxiliary power supplies are converted, the open signal will not be closed by utilizing its slow release characteristic. (3) During normal unlocking, the slow release characteristic of LXJ is utilized to turn on the unlocking power at the beginning. (4) When a train enters the inner side of the signaling machine, its easing characteristic is used to send power to the 10th network line to prevent head-on error unlocking.
5. When a double-action (triple-action or quadruple-action) turnout is idling, how to judge which group is idling at the console face?
Answer: after receiving the notice of the watchman, go to the console face to operate the turnout, pay attention to observe the ammeter, if the ammeter pointer swings once without resetting, it means that the first move idling; if the ammeter pointer swings for the second time without resetting, it means that the second move idling, the third, the fourth move, and so on, in general, the number of the big for the first move, the number of the small for the second move, but according to the station and the use of different cable is not exactly the same, it is not exactly the same, but it is not exactly the same. But according to the station and the cable is not exactly the same, so also remember clearly, so as not to affect the fault processing time.
6, the replacement of squeeze cut pin should pay attention to what?
Answer: when replacing the squeeze cut pin should pay attention to whether the top nut is tightened, screwed to the end, shall not be higher than the rack surface, whether the nut is touched to start the teeth, the replacement of the finished back and forth shaking observation. In the process of replacement, shaking, there may be shifted contactor jumped up, should be pressed, and finally should be contacted wrenching test, double-checking the fixed, reverse position are indicated, before the pin point delivered for use.
7, the turnout indicates that the relay jitter is what causes?
Answer: turnout relay jitter is connected in parallel to the turnout relay coil capacitance failure (open circuit) or capacitance line open circuit.
8, turnout 2DQJ contact burned out what is the main reason?
A: turnout 2DQJ contact burned out the main reasons are: (1) turnout idling, too much back and forth wrenching turnout, through the 2DQJ contact turnout action current is large, instantaneous generation of arcs, burned out contact; (2) 2DQJ pole contact arc quencher installed on the reverse.
9, in the console how to determine the four-wire turnout wrenching fault range?
Answer: the fork to the position of the indicated, single manipulation of the fork view of the indicated light and ammeter pointer, such as the indicated light does not go out, it is not motivated 1 DQJ; such as the indicated light is out and then bright, it is not 2DQJ turn pole. If the indicated lamp extinguished lamp, then first check whether the action fuse is intact, and then use the meter in the distribution frame measurement, . If the measured X4 and X1, (X2) terminal resistance of about 25 ~ 30Ω, then the fault in the indoor action circuit. If the measured resistance is greater than 30Ω, the fault is in the outdoor.
10, caused by the ZD6 single-action turnouts can not trigger the main reasons for the outdoor?
Answer: single-acting turnouts can not trigger the common outdoor faults are: (1) automatic opener 11-12 or 41-42 contact poor; (2) poor contact safety contacts; (3) poor contact carbon brush; (4) motor failure (coil short circuit or open circuit); (5) poor contact plug; (6) cable failure (mixed line, broken line, short circuit, etc.); (7) wiring broken or terminal poor contact.
11, caused by the turnout no indication, crowded turnout bell ringing the main reason is what?
Answer: the main reasons for the turnout is not indicated, crowded turnout ringing: (1) turnout is crowded; (2) rod broken; (3) shift contactor contact poor or jump up; (4) diode breakdown; (5) automatic opener contact is bad; (6) poor contact connector; (7) indicated that the baking breakers burned off and so on.
12, arrange the positive line to pick up the car into the road, the white light band has appeared, but the signal open can not be the main reason?
Answer: the main reasons: (1) LXJ no excitation and self-closing (2) outdoor on the yellow bulb broken wire or poor contact; (3) cable failure (broken wire, mixed wire, short circuit, etc.).
13, 6502 electrical centralized console of a section of the KZ fuse burned out what fault phenomenon will occur?
Answer: console a section of the KZ fuse burned out, there will be: (1) the section inbound, outbound and shunting trains or shunting button is pressed, the button indicates that the light does not light (AJ does not suction), the arrangement of the way in indicates that the light does not come on: (2) part of the throat or the whole throat (such as the section has a total set, total reverse button) turnout trigger does not move: (3) such as the total manual unlocking, cancel the button, turn on the light with the button, turnout indication button is in the section, then none of these buttons work when pressed.
14, 6502 electrical centralized parallel transmission type turnout selection circuit has what advantages?
Answer: (1) can be used to the rightmost end of a relay suction conditions, to prove that the approach has been selected. (2) The sequence of turnout election and sequential startup is favorable to reduce the peak rectifier output current of the turnout startup power supply. (3) regardless of how many relays are connected in parallel, at the same time by the network power supply only two relays, so that the relay terminal voltage is basically unchanged, does not affect the relay action time, the relay action time parameter requirements are not stringent, can ensure that the circuit is stable and reliable work.
15, 6502 electrical centralized console of a section of the KF fuse burned out what fault phenomenon will occur?
Answer: Pressing the transfer button indicates that the light does not flash, arranging the feed indicates that the light does not light up, and the transfer feed can not be rowed.
16, 6502 electrical centralized console zero layer JZ fuse burned out what fault phenomenon will occur? Does it affect the arrangement of the approach?
Answer: Failure phenomenon: separate locking turnout, separate locking indicated that the red light does not light. Because the console zero layer JZ only for turnout alone locking indicated red light, so its fuse burned out does not affect the normal approach arrangement.
17, 6502 electrical centralized console signal repeater flash what is the reason?
Answer: The main reasons are: (1) outdoor bulb broken or poor contact (individual flash); (2) combination of the side of the shelf fuse burned out or poor contact (individual flash); (3) filament relay failure (individual flash); (4) combination of the shelf zero level signal power fuse burned out (the shelf's signal combination of the flash of the repeater); (5) the power screen signal power fuse burned out (the whole station). repeater flashes).
18, 6502 electrical centralized control console light band indicator lamp or other indicator lamp flash what is the reason?
Answer: the console light band indicates that the light or other indicates that the light flashes because the SJZ power supply and JZ power mixing. Most of this failure occurs in the arrangement of the incoming circuit, press the button, the button indicates that the short circuit between the lights caused by the whole station SJZ power supply and JZ mixing power, so that the whole station indicates that the light flashes.
19, 6502 electrical centralized combination of rack zero layer KZ fuse burned out what phenomenon will occur?
Answer: (1) the frame has a combination of zones, in the console appears red band (DGJF fall); (2) the frame has a combination of directions, the whole throat can not row into the road, the whole throat into the road can not be unlocked properly: (3) the frame has a combination of turnouts, turnouts can not be wrenched; (4) the frame has a combination of signals, the signal point for the beginning or the end of the road can not be elected.
20, 6502 electrical centralized combination of rack zero layer JZ fuse what role?
Answer: (1) for signal repeater, button light: (2) for the incoming optical tape light; (3) for the turnout light and so on.
21, how to measure the AC lamp power supply to ground current?
Answer: Measurement of AC power supply to ground current, first of all, an ammeter pen in series with a 0.5 A fuse, another pen in series with a 550 Ω adjustable resistor. At this time, the resistance value will be adjusted to the maximum, and then a pen grounded, another pen connected to the JZ power supply terminals, the measured current for the JF power supply grounding reference current, such as the grounding reference current is greater than 100 mA, indicating that the JF grounding is serious shall not be adjusted to reduce the resistance in order to prevent the power supply to ground, if the reference current is less than 100 mA, the resistance can be gradually reduced to zero, in order to measure JF direct grounding current, and then the pen connected to the JZ. and JZ connected to the table pen removed and connected to the JF power supply, with the same method described above can be measured JZ power ground current.
22, three-phase induction regulator is how to regulate the voltage?
Answer: when the power supply voltage decreases (or increases), its output voltage is lower than the lower limit of rated accuracy (or higher than the upper limit of rated accuracy), the rotor is driven by the drive motor to a direction of rotation, change the size of the relative angular displacement between the stator windings and rotor windings, the output voltage to obtain a smooth and stepless regulation to achieve the purpose of regulating the voltage.
23, lightning protection components, equipment selection principles?
Answer: the principle of selecting lightning protection components is not to affect the normal operation of the protected equipment under the principle of lightning protection components to play the best protective effect. Installed in different equipment, according to its current capacity, cut off the current capacity, action time requirements and the size of the residual voltage, the lightning protection components should be different.
24, in the 6502 electrical centralized circuit of the 6th network line connected to the QJJ rear contact, CJ front contact, DGJ front contact what role?
A: Shen connected to the 6th network line on the QJJ rear contact, CJ front contact and DGJ front contact *** with the equivalent of the role of SJ front contact. Because the QJJ loss of magnetism fall and CJ excitation suction, proving that the turnout section in the unlocking state, DGJ excitation suction, proving that the track section is idle, so when the turnout section is occupied by a car or section in the approach to the locking state of the 6th network route are cut off. So that the selected approach to the beginning and end of the JXJ and DCJ or FCJ do not get KF power, JXJ can not form the excitation, the button relay and the direction of the relay will not be restored, in order to achieve the purpose of the failure to store the approach and to prevent the turnout error conversion.
25、What are the characteristics of S700K type electric rutting machine?
A: S700K type electric rutting machine has the following main features: (1) the use of AC three-phase motor, not only to fundamentally solve the original DC electric rutting machine must be set up rectifier caused by the high failure rate, the use of short service life, maintenance of a large amount of shortcomings, and reduce the cross-section of the control wire, extend the control distance. (2) A ball screw with a diameter of 32 mm is adopted as the driving device, which extends the service life of the rutting machine. (3) Adoption of a holding coupling with a spring-type squeeze-off device and selection of non-squeezable parts fundamentally solved the inertia failure caused by the labor damage of the squeeze-cut pin. (4) A multi-piece dry adjustable friction coupling is adopted, which is factory adjusted and sealed, and no further adjustment is required in use.
26, for S700K type electric rutters why field maintenance personnel shall not adjust the friction at will?
A: Because for DC electric rutters, their electromagnetic torque is proportional to the square of their armature current. Field maintenance personnel can adjust the size of the friction coupling's friction force by testing its fault current (the input current of the DC series-excited motor when the motorized rutting machine is idling). As for the three-phase AC electric rutters, the action current cannot visually reflect the pulling force of the rutters, so the field maintenance personnel cannot monitor the friction force through the test of the three-phase AC input current, and the adjustment must be carried out by the professionals with the special equipment. The factory has carried out standardized testing and adjustment of the friction force when the rutting machine was shipped out from the factory, so the on-site maintenance personnel shall not adjust the friction force arbitrarily.
27, TYJL-Ⅱ type computer interlocking system is through what network card for communication?
A: The communication relationship is as follows: (1) interlocking machine A machine an interlocking machine B machine: STD-01 network card a STD-01 network card; (2) interlocking machine a monitoring machine: STD-01 network card a PC-01 network card; (3) monitoring machine an electrical machine: Ethernet card an Ethernet card.
28, TYJL-II computer interlocking system interlocking machine backup machine of the three working conditions of the relationship?
Answer: The relationship between the three working states is as follows: when the standby machine failure, offline; when the host failure, the system automatically switches to the standby work, the original host automatically offline. After the failure of the standby in the offline state is repaired, press the online button and the standby will be transferred to the online state.
29, railroad signaling project acceptance of the contents of which include?
A: acceptance of the basic content of the work is based on the relevant technical standards, design documents and construction budget for the inspection and acceptance of the quality of the project, mainly including checking whether the relevant documents and information is complete, indoor and outdoor equipment installation in accordance with the technical requirements and quality standards, the electrical characteristics of the equipment and function in accordance with the requirements of the interlocking relationship between the correct.
30, how to organize the project acceptance?
A: acceptance of the project, should be based on the construction unit inspection and evaluation. By the construction unit, supervision units, construction units, take over the unit, the line of the relevant departments of the acceptance of the group, based on design documents, construction specifications, acceptance criteria and the relevant standard drawings and related contracts, agreements and other documents on the basis of the quality of the project to carry out a detailed inspection. Confirmation of the quality of the project in line with the Ministry of technical standards, design documents and budget requirements, confirm that all the interlocking test is correct and the completion of documents, information is complete, before acceptance and handover in accordance with the prescribed procedures.
31, 6502 electrical centralized circuits for normal unlocking of the unlocking network action pattern?
A: Normal unlocking, if the car running direction is from left to right, the feeder relay 1LJ first excitation suction, the same section of the feeder relay 2LJ after the excitation suction, after the first section unlocked, the second section unlocked, from the beginning of the feeder to the terminal section by section unlocked. If the running direction is from right to left, the inlet relay 2LJ is excited and suctioned up first, and the inlet relay 1LJ in the same zone is excited and suctioned up later, and also the first zone is unlocked, and the second zone is unlocked, and unlocked section by section from the beginning of the inlet to the terminal.
32, UM71 track circuit in order to realize the ground equipment lightning protection, SVA center point and signal cabinet equipotential strip connection exists which three cases?
Answer: (1) When there is no lateral connection between the upper and lower tracks, each SVA center point through a "SOVLE" type lightning arrester connected to the equipotential bar of the signal cabinet. (2) When there is a simple transverse connection between the upper and lower tracks, the centers of the two SVAs are connected to the equipotential strip of the signal cabinet through a "SOVLE" type lightning arrester. (3) When there is a complete lateral connection between the upper and lower tracks, the centers of the two SVAs are connected directly to the equipotential bars of the signal cabinet.
33、How to determine whether the TDCS station collector communication is interrupted?
Answer: The communication interruption of the acquisition machine will affect the corresponding test function. When the measured data or station display is not normal, the first thing you should do is to check whether the acquisition machine is dead or not. Collector communication interruption, generally can hear the industrial computer issued a beep alarm, the main screen status bar CAN communication hit ×, the collector communication status window will automatically pop-up, such as not pop-up can be in the main window, click the right mouse button on the "Communication Window" selection, which communication interruption of the collector's connection is gray.
34, computer interlocking system on the power supply requirements?
Answer: the power supply from the power screen to supply the computer with the power supply must be a separate output, not to be mixed with other equipment, and the power supply must be isolated, purified to reduce the power supply interference with the computer, and the use of uninterruptible power supply (UPS), UPS should be set up a double set of each other as a backup. The effectiveness of the UPS battery should be tested, the main indicator of effectiveness is its standby operating time, i.e., when the UPS input power outage, the operating time by the battery inverter output, should be no less than 10 min. computer interlocking AC power supply connection, should be used to terminals or locking socket to ensure the reliability of the power connection.
35, how to test the cable insulation to ground?
Answer: Separate all the cores at one end of the cable, with a 500 V megohmmeter core-by-core test, the other end of the cable core and the ground or with the insulation resistance between the cable sheath, the resistance value of more than a few tens of megohms is qualified. When testing the insulation of cables in use, use a 500 V megohmmeter. The earth end of the megohmmeter to ground, the other end of the cable terminals in use, with 120 r/min speed shaking the handle, the measured value of the cable to ground insulation. Large stations throughout the ground insulation should be more than 0.5 MΩ, small stations throughout the ground insulation should be more than 1MΩ. Note: When testing the insulation to ground, the school table, that is, the ground end of the ground, the other end of the ground, if you shake the megohmmeter when the value of zero, that megohmmeter is good, otherwise the megohmmeter is bad.
36, TDCS dual-machine operation of the station machine system of a normal function of the reality, but the function of the report can not be used, what is the reason? How to solve?
Answer: The reason is that the machine in use is in the standby state, and at this time the information exchanged with the dispatching station is in red. Because only in the host state can have the function of reporting points, and in the host state when the information exchanged with the console should be blue. The solution is to convert the standby into a host.
37, computer network technology, what is the IP address? What are its composition and format?
Answer: IP address is the TCP / IP network host (or known as the node) of the unique address. IP address is the logical address of the network layer. IP address is a set of 32-bit-long binary digits; IP address is composed of: network address + host address.
38, indoor equipment welding wiring should meet what requirements?
A: (1) welding shall not be used with corrosive flux, can use alcohol rosin as a flux. (2) Welding must be firm, the welding point should be smooth, no burrs, false welding, false welding phenomenon. (3) For terminals with holes, the line should be threaded into the hole before welding. (4) The wiring threads should be protected with plastic hose, and the length of the casing should be even and consistent.
39, TDCS acquisition layer unit board without any lighted light-emitting diode, what is the cause of the failure? How to deal with?
Answer: The cause of the failure is 220 V power supply or 5V sampling power supply fuse blown. The treatment method is to find the fault point and restore power supply can be.
40, 6502 electrical centralized transfer relay 1-2 coil circuit in the DGJF group 5 front contact what role?
A: In the transfer relay 1-2 coil circuit access DGJF group 5 front contact, its role is in the section of the car or track circuit failure, can not be used to fault unlocking method to make the section of the turnout unlocked.
41, JD-1A type computer interlocking system network structure diagram of each color represents what meaning?
A: green, that a machine is in the main control, electrical maintenance machine for work. Yellow, indicating that a machine is in a state of failure. White, indicating that the network communication is normal, but not in the main control and hot standby state. Red, indicating that network communications are interrupted.
42, TJWX-2000 type microcomputer monitoring system how to realize the principle of high-voltage asymmetric track circuit monitoring?
Answer: The monitoring of high-voltage asymmetric track circuit is completed by the comprehensive acquisition machine, and the station system is no longer equipped with track acquisition machine. Comprehensive acquisition machine through the switching output board switching (special design), control of high-voltage asymmetric test combination relay action, select a track voltage to the voltage conversion unit. Inside the conversion unit, the track voltage is isolated and quantized by the voltage module and converted into a standard voltage of 0-5 V. Then it is fed into the analog voltage of the integrated acquisition machine. And then sent to the comprehensive acquisition machine analog input board, through the selection sent to the CPU for A/D conversion.
43, electrification section of various ground should be set?
A: electrification section of the various signaling equipment lightning protection devices should be set up lightning ground; signaling machinery indoor combination of racks (cabinets), computer interlocking cabinets, power screens, consoles, and outdoor relay box, turnout grip, with handle turnout indicator, signaling ladder and so on should be set up safety ground; all the cables of the metal sheath (including communication cables) should be set up to shield the ground. Fitted with computers and microelectronic equipment should also be a single safety ground.
44, electrification section of the signaling equipment of various ground installation requirements?
A: electrified section of the signaling equipment of all kinds of ground installation shall not be combined with electricity, buildings and communications ground. Signal ground and electric power, building ground (including the grounding body of the lead) distance between should not be less than 20 m; and communication ground (including grounding body and lead) distance between should not be less than 15 m. When the local ground lead can not reach the above distance, in order to prevent mutual interference through the ground, should be insulated.
45, electrification section track circuit set the purpose of the choke transformer?
A: electrified section of the rail as traction return channel, and signaling equipment and rail as a signal transmission channel, which constitutes a complete track circuit equipment to complete the interlocking. So the requirement of track circuit system should have good electromagnetic compatibility. In order to separate the traction current, so in the rail insulation at the setting of the choke transformer BE.
46, replacement of two neighboring choke transformer with suction on the line (or back to the line) of the neutral connecting plate, how to carry out?
Answer: when replacing the neutral connection plate with suction line (or return line) of two neighboring choke transformers, it is necessary to make the connection of "two horizontal and one vertical" temporary return connection line before replacing, and connect the suction line or return line to the rails temporarily, and then the power supply personnel will cooperate with the withdrawal of the suction line (or return line), and then connect the new neutral connection plate, and then connect the new neutral connection plate, and then the new neutral connection plate will be connected. Neutral connection plate, and then connect the suction line (or return line), all connected and then remove the "two horizontal and one vertical" temporary return line.
47, in order to prevent the traction power supply equipment on the signaling equipment interference, what protective measures have been taken?
A: (1) the use of high-capacity choke transformers to match the maximum traction current. (2) track circuit receiving inputs installed anti-interference adapter (different signaling equipment system using different adapters), to mitigate the inrush current, reduce the impact of unbalanced current. (3) The track relay coil at the receiving end of the track circuit is connected to a protection box to filter out the 50 Hz fundamental and harmonic components of the unbalanced current and ensure that the signal current attenuation is very small. (4) Add a repeat relay to prevent instantaneous mis-activation of the track relay.
48, how to adjust the track circuit on the UM71 bridge?
Answer: the bridge track circuit are wheel guard rails or have thermal expansion and contraction rails. Although in the wheel guard rail with insulation section, but the bridge on the wooden sleeper or not clean cement pillow roadbed, in the rail and sleeper insulation between poor and other cases, will still constitute a lot of road loop, the direction of its current sensing the direction of current and track in the direction of the opposite direction of the current transmitted, which makes the reception of the normal adjustment, the reception of the limit into the voltage is far less than the value of the table of adjustment, in order to make the normal operation of the UM71 track circuits, generally in the actual use of reception will be The level is increased by 2-6 levels for adjustment.
49, cable more than 7.5km, how to adjust the UM71 track circuit?
A: When the cable length exceeds 7.5km, firstly, the total length of the cable at the sending and receiving ends will be adjusted to the same length, so that it is easy to change the running direction. Then according to the cable increases 0.5-1.5 km, the reception level increased by 1 level of adjustment. When the cable is increased by 1.5-2.5 km, the reception level is increased by 2 levels. The cable increase refers to the sum of the cable increase at the sending and receiving ends.
50. What is the function of the empty core coil?
A: (1) in the electrified section of the section by section to balance the two rails of the traction current return; (2) to achieve equipotential connection between the up and down lines; (3) improve the Q value of the electrical insulation section to ensure the stability of the work.
51?￠What is the function of ZPW-2000A type non-insulated frequency shifting automatic blocking transmitter?
Answer: (1) generate 18 kinds of low-frequency signals, 8 kinds of carrier frequency of high-precision, high-stability frequency-shifting signals; (2) generate sufficient power output signal; (3) adjust the track circuit; (4) self-testing of the characteristics of the frequency-shifting signals, faults to give the alarm and the conversion conditions of the use of the N + l redundancy.
52、What is the function of ZPW-2000A type uninsulated frequency shifting automatic blocking receiver?
Answer: (1) used for demodulation of the main track circuit frequency shift signal, and with the sending end connected to the tuning section of the small track circuit of the checking conditions of the action track relay; (2) the realization of the tuning section connected to the receiving end of the tuning section of the demodulation of the small track circuit frequency shift signal, giving a short small track circuit of the implementation of the conditions to be sent to the neighboring track circuit receivers; (3) checking the track circuit intact, reducing the the length of the tap dead zone, and also realizes the checking of the tuning unit (BA) disconnection with the reception threshold control.
53, ZPW-2000A type uninsulated frequency shifting automatic blocking attenuation disk role?
Answer: (1) used as the main track circuit of the receiver input level adjustment; (2) for small track adjustment (including positive and negative direction); (3) give the relevant transmission and reception power supply voltage, transmission power output voltage, track input and output GJ, XGJ test conditions; (4) give the transmission and reception fault alarm and track occupancy indicator lamps, etc.; (5) in the N +1 redundancy utilization Realize the fall delay of the main track relay and the small track relay during the receiver fault transition.
54. What data can be tested on an electrically coded transmitter from the electrically coded combination DM plug hole on the integrated rack?
Answer: The supply voltage and output voltage of the coding transmitter can be tested through the coding combination DM plug hole. The supply voltage should be 23-28 V, and the output voltage should be about 135 V, since the transmitter in the station transmits class 3.
55, 6502 electrical centralized circuit QJ when suction? When does it fall?
Answer: (1) When canceling an approach or manually unlocking an approach, QJ is activated by the conditioned power supply "KF-ZQJ-Q", and QJ is activated by the beginning pushbutton relay; and after the approach is unlocked, it falls down with the fall of XJJ. (2)When canceling the record of mistakenly touching the button, press ZQA to activate QJ, and then recover when "KF-ZQJ-Q" is not powered.
56、What is the function of BHJ in the speed-raising turnout?
A: (1) rutting machine power on suction, constitute 1DQJ self-closing circuit; (2) rutting machine conversion in place, start the circuit cut off when dropped to cut off the 1DQJ self-closing circuit; (3) three-phase power supply phase, cut off the 1 DQJ self-closing circuit, to protect the motor.
57, 6502 electrical centralized circuits in the interlock table includes what?
A: The interlocking table includes the approach number, the direction of approach, the nature of the approach, the button should be pressed, the name and display of the signaling machine, the name and location of the turnout, hostile signals, through the track section and other interlocks.
58, 6502 electrical centralized circuits in the auxiliary start relay has what purpose?
Answer: In the approach selected, the recording circuit before the recovery, with the auxiliary start relay and start relay to continue the beginning of the button relay and the direction of the relay work, auxiliary start relay also prevents the signal from automatically repeating the opening and arranging the long shunting approach, shunting signaling machine from far to near the sequence of the role of the opening. Long shunting approach is also known as composite shunting approach.
59, how to determine the polarity of the diode?
Answer: the multimeter is placed in the ohm block, the diode is forward, reverse measurement once. When the measured resistance is small, the black pen connected to the end of the diode for the positive pole, the other pole for the negative pole.
60, what is the principle of operation of the transformer?
A: Transformer is composed of two or more mutually insulated coils, wound on a closed core. It is an energy transfer device, is the use of electromagnetic induction, magnetic coupling principle of work. Its main components are the core and the winding, the core is the magnetic circuit part of the transformer and the winding is the circuit part of the transformer.
61, what is the role of the conversion screen?
A: the two-way power conversion; AC screen, DC screen, the main screen, the manual conversion between the backup screen can be done to standby screen completely disconnected; regulator screen failure or need to overhaul can be cut off manually, and to ensure that the regulator screen is completely disconnected; will be the input and output power convergence.
62, change the direction of the role of the relay GFJ?
A: Used to record the action of the connection station requires a change of direction. In the receiving station GFJ fall, in the sending station GFJ suction.
63, what is the role of the short-circuit relay DJ?
Answer: assist in changing the direction of operation, instantaneous short-circuit direction of the circuit loop outside the line, clearing the interference of the outside line, and at the same time use DJ as an auxiliary for the light conditions of the lamp.
64, in the normal change of direction or auxiliary change of direction, the circuit when how to act?
A: the circuit action can be divided into three steps: the original station FJ turn pole, cancel the right to send the train, become a receiving station; two station power supply in series, so that the inter-area FJ (including ZBFF combination) reliable turn pole; receiving station FJ turn pole, change to send the station, to obtain the right to send the train.
65, how to use a multimeter to measure the phase of the two input power of three-phase alternating current?
Answer: Place the multimeter in a higher stop than 380 V AC. With the multimeter's two pens were accessed I road and II road power supply of a phase, the measured value between zero and tens of volts, indicating that the measurement of the two power supply phase is the same phase, the same method can be measured in the other two phases. In the I road power supply phase A and II road power supply phase A measured voltage within zero to tens of volts, indicating that the two phases of power supply is the same phase; if in the I road power supply phase A and II road power supply phase B measured voltage, up to more than a hundred volts, indicating that the different phases.
66, power screen AC voltmeter V1, V2, V3 and AC ammeter A test is what?
Answer: Voltmeter V1, V3 respectively through the transfer switch 1QC, 4QC test I road, II road power supply phase voltage of each phase. As they are connected to the top of the AC contactor contacts, you can test the voltage of the two power supplies at any time. Voltmeter V2 tests the phase voltage of each phase output from the power supply screen through transfer switch 3QC. Ammeter A is connected to the 3 sensors 1TA, 2TA, 3TA at the rear of the AC contactor through transfer switch 2QC to test the input current of each phase of the power supply.
67, three-phase AC power screen is how to protect the phase break?
A: The three-phase AC power supply screen relies on the phase sequence protector for phase break protection. Because the phase sequence protector can not only supervise the power supply phase sequence protection, there is a phase protection function, so only need to use the phase sequence protector can complete the phase protection function.
68、After the inbound signaling machine displays two yellow lights, the second yellow light goes out for some reason, what will happen to the inbound signaling machine display at this time? Why?
Answer: After two yellow lights are displayed on the inbound signaling machine, the second yellow light goes out for some reason, and then the inbound signaling machine displays the prohibited signal - red light. Because the first yellow light circuit in the inbound signaling lights in series with the 2DJ front contact, when the second yellow light out, due to the 2DJ ↓ - DJ ↓ - LXJ ↓, so that the first yellow light is also extinguished, the signal is closed, and change the point of the prohibited light - red light.
69, 6502 electrical centralized circuit in the transfer relay CJ fell, which cases and can make its excitation suction?
Answer: (1) When the zone is idle and faulty unlocked, it is sucked up after pressing the faulty zone button and the general manual unlock button on the manual unlock button panel. (2) Normal unlocking, when the car out of the clear track section 3-4s after suction up. (3) At manual unlocking, canceling approach and shunting midway back to unlocking, when either of the approach relays 1LJ and 2LJ is sucked up, CJ is sucked up immediately.
70, when the power screen stops supplying power, what are the steps to close the JD-1A computerized interlocking system?
Answer: (1) turn off the maintenance machine power supply; (2) turn off the A, B each computer power supply; (3) turn off the A, B power box 5 V, 12 V, 32 V power switch; (4) turn off the interlocking cabinets AC220 V air switches; (5) turn off the operation of the switching unit indicated by the 24 V power switch; (6) turn off the operation room equipment power supply; (7) turn off the A, B UPS power.
71, JD-1A computer interlocking system to open the steps?
Answer: (1) turn on the A, B UPS power supply; (2) open the interlocking cabinet AC220 V air switch; (3) open the A, B power box 5V, 12 V, 32V power switch; (4) open the operating room equipment power; (5) open the A, B power supply to the computers; (6) open the power supply of the maintenance machine; (7) open the operation of the switching unit 24 V power switch. power switch.
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