CN114783154A - Alarm control system of high-voltage test safety fence - Google Patents
Alarm control system of high-voltage test safety fence Download PDFInfo
- Publication number
- CN114783154A CN114783154A CN202210187950.4A CN202210187950A CN114783154A CN 114783154 A CN114783154 A CN 114783154A CN 202210187950 A CN202210187950 A CN 202210187950A CN 114783154 A CN114783154 A CN 114783154A
- Authority
- CN
- China
- Prior art keywords
- leakage protection
- phase
- protection switch
- relay
- power transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 78
- 230000005540 biological transmission Effects 0.000 claims abstract description 74
- 230000006698 induction Effects 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 16
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000002955 isolation Methods 0.000 description 11
- 230000007547 defect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/185—Electrical failure alarms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electromagnetism (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides an alarm control system of high-voltage testing security fence, includes a casing, be equipped with three-phase power transmission line and earth connection in the casing, set up the three-phase switch between the input of three-phase power transmission line and the output, set up first earth leakage protection switch between three-phase switch and the three-phase power transmission line output and on the earth connection, set up a ground wire break-make detecting element between the input of any phase line of three-phase power transmission line and the earth connection, set up an induction detecting element between three-phase switch and the first earth leakage protection switch, set up a circular telegram control unit between first earth leakage protection switch and the three-phase power transmission line output and on the earth connection, the input and the output of three-phase power transmission line, earth connection all correspond the electricity with a plurality of binding post that set up in the casing outside and are connected.
Description
Technical Field
The invention relates to the field of electrical control, in particular to an alarm control system of a high-voltage test safety fence.
Background
In the manufacturing or maintenance process of the high-voltage electrical equipment, latent defects are left in the high-voltage electrical equipment due to flaws in materials or processes or due to temporary carelessness of operators. If the high-voltage electrical equipment with defects is put into the power system to operate, accidents happen at some time; although some accidents do not happen temporarily, after the operation is performed for a period of time, the original defects are further developed due to the action of electric power, humidity, temperature and the like, and finally, the accidents are also expanded. Accidents of high-voltage electrical equipment during operation usually cause serious consequences, not only damage the equipment, but also trip of lines and interruption of power supply, and seriously affect social life order and production activities. In order to prevent accidents during or during the operation of high-voltage electrical equipment, high-voltage tests must be carried out on the high-voltage electrical equipment in order to find latent defects in the equipment in time. Therefore, the high-voltage test is an important means for preventing electrical accidents and has important significance for safe operation of the power system.
At present in the high-voltage testing process, even installed security fence at high-voltage electrical equipment's test site and established electrified isolation region to mark warning sign on security fence, in order to try to prevent personnel from mistake and go into electrified isolation region, nevertheless personnel mistake income electrified isolation region's accident still takes place occasionally, even in the high-voltage testing process, whether individual staff is not through confirming in the security fence other personnel still, just direct switch on power is tested, very easily arouse the incident.
Moreover, the insulation layer between the internal circuit of the high-voltage electrical equipment and the metal shell is often damaged due to various reasons, so that electric leakage or breakdown is generated and the metal shell is electrified, which not only easily causes equipment damage, but also even personal injury accidents. Therefore, before a high-voltage test is carried out on high-voltage electrical equipment, the metal shell of the high-voltage electrical equipment needs to be grounded, and once electric leakage occurs, the power supply of the electrical equipment is cut off immediately through a protection device of an internal circuit, so that the personal safety is guaranteed.
However, the high-voltage electrical equipment often causes ground wire disconnection due to various reasons, such as a missed ground wire, or even though the ground wire is connected, the ground point is corroded or the ground resistance is too large, and the ground wire cannot be detected by the naked eye of a worker, so that great potential safety hazards are caused.
Disclosure of Invention
The invention aims to provide an alarm control system of a high-voltage test safety fence aiming at the corresponding defects of the prior art, which can detect the on-off of the ground wire of high-voltage electrical equipment and automatically control the on-off of power input according to the field condition, thereby greatly reducing the potential safety hazard of an electrified isolation area and increasing the working efficiency of field workers.
The purpose of the invention is realized by adopting the following scheme: the utility model provides a high-voltage testing security fence's alarm control system, includes a casing, be equipped with three-phase power transmission line and earth connection in the casing, set up the three-phase switch between the input of three-phase power transmission line and the output, set up first earth leakage protection switch between three-phase switch and the three-phase power transmission line output and on the earth connection, set up an earth connection break-make detecting element between the input of arbitrary phase line of three-phase power transmission line and the earth connection, set up an induction detecting element between three-phase switch and the first earth leakage protection switch, set up a circular telegram the control unit between first earth leakage protection switch and the three-phase power transmission line output and on the earth connection, the input and the output of three-phase power transmission line, earth connection all correspond the electricity with a plurality of binding post that set up at the casing outside and are connected.
Preferably, the ground wire on-off detection unit comprises a ground wire off indicator and a third relay, the third relay and the ground wire disconnection indicator lamp are both arranged between the input end of any phase line of the three-phase power transmission line and the zero line access end of the first leakage protection switch, one end of the ground wire disconnection indicating lamp is connected with any wire inlet end of the three-phase disconnecting link through a normally open contact group of a third relay, the other end of the ground wire disconnection indicating lamp is electrically connected with the zero line access end of the first leakage protection switch, the zero line access end of the first leakage protection switch is electrically connected with one end of a coil of the third relay, the other end of the coil of the third relay is connected with the input end of any phase line of the three-phase transmission line through a second leakage protection switch, and a ground wire on-off test button is arranged between the second leakage protection switch and the input end of any phase line of the three-phase power transmission line.
Preferably, the sensing detection unit comprises a main control circuit board, a signal input end of the main control circuit board is electrically connected with a sensor for sensing a human body, a signal output end of the main control circuit board is electrically connected with a coil of the first relay, a power input end of the main control circuit board is electrically connected with an output end of a rectification power supply, and the rectification power supply is arranged between any wire outlet end of the three-phase disconnecting link and a zero line access end of the first leakage protection switch;
the power-on control unit is arranged between any live wire connecting and outputting end of the first leakage protection switch and the zero line connecting and outputting end, the power-on control unit comprises a test operation indicator light and a contactor, one end of a coil of the contactor is connected with a zero line output end of the first leakage protection switch through a normally closed contact group of a third relay, the other end of the coil of the contactor is connected with any live wire output end of the first leakage protection switch through a normally open contact group of the first relay, the output ends of the live wires of the first leakage protection switch are correspondingly connected with the output ends of the phase wires of the three-phase power transmission line through a first normally open contact group of the contactor, one end of the test operation indicator lamp is electrically connected with any live wire connecting outlet end of the first leakage protection switch, and the other end of the test operation indicating lamp is connected with the zero line output end of the first leakage protection switch through a second normally open contact group of the contactor.
Preferably, the remote control device comprises a wireless remote controller, and the main control circuit board is provided with a remote control signal receiving module for receiving signals sent by the wireless remote controller.
Preferably, the signal input end of the main control circuit board is electrically connected with a proximity switch for sensing the state of the safety fence.
Preferably, the signal output end of the main control circuit board is electrically connected with an alarm device.
Preferably, a second relay is arranged between any outgoing terminal of the three-phase disconnecting link and a zero line access terminal of the first leakage protection switch, a power safety indicator lamp is arranged between the zero line access terminal of the first leakage protection switch and an input end of any phase line of the three-phase power transmission line, and one end of the power safety indicator lamp is connected with the input end of any phase line of the three-phase power transmission line through a normally closed contact group of the second relay.
Preferably, a preparation indicator lamp is arranged between any live wire access end and zero line access end of the first leakage protection switch, and a normally open contact group of the second relay and a normally closed contact group of the contactor are sequentially arranged between one end of the preparation indicator lamp and any live wire access end of the first leakage protection switch.
Preferably, an emergency stop switch is arranged between the normally open contact group of the first relay and any live wire connecting and outputting end of the first leakage protection switch.
Preferably, two ends of the normally closed contact group of the third relay are respectively connected with an incoming line end and an outgoing line end of the third leakage protection switch.
The invention has the following beneficial effects: the improved motor casing is characterized in that a three-phase power transmission line and a grounding line are arranged in the casing body, a three-phase disconnecting link is arranged between the input end and the output end of the three-phase power transmission line, a first leakage protection switch is arranged between the three-phase disconnecting link and the output end of the three-phase power transmission line and on the grounding line, a grounding line on-off detection unit is arranged between the input end of any phase line of the three-phase power transmission line and the grounding line, an induction detection unit is arranged between the three-phase disconnecting link and the first leakage protection switch, an electrifying control unit is arranged between the first leakage protection switch and the output end of the three-phase power transmission line and on the grounding line, and the input end and the output end of the three-phase power transmission line and the grounding line are all electrically connected with a plurality of wiring terminals arranged outside the casing body in a corresponding mode.
Preferably, the ground wire on-off detection unit comprises a ground wire off indicator and a third relay, the third relay and the ground wire disconnection indicator lamp are both arranged between the input end of any phase line of the three-phase power transmission line and the zero line access end of the first leakage protection switch, one end of the ground wire disconnection indicating lamp is connected with any wire inlet end of the three-phase disconnecting link through a normally open contact group of a third relay, the other end of the ground wire disconnection indicator lamp is electrically connected with the zero line access end of the first leakage protection switch, the zero line access end of the first leakage protection switch is electrically connected with one end of a coil of the third relay, the other end of the coil of the third relay is connected with the input end of any phase line of the three-phase transmission line through a second leakage protection switch, and a ground wire on-off test button is arranged between the second leakage protection switch and the input end of any phase line of the three-phase power transmission line.
Preferably, the sensing detection unit comprises a main control circuit board, a signal input end of the main control circuit board is electrically connected with a sensor for sensing a human body, a signal output end of the main control circuit board is electrically connected with a coil of the first relay, a power input end of the main control circuit board is electrically connected with an output end of a rectification power supply, and the rectification power supply is arranged between any wire outlet end of the three-phase disconnecting link and a zero line access end of the first leakage protection switch;
the electrifying control unit is arranged between any live wire connecting and outputting end and the zero wire connecting and outputting end of the first leakage protection switch, the power-on control unit comprises a test operation indicator light and a contactor, one end of a coil of the contactor is connected with the zero line output end of the first leakage protection switch through a normally closed contact group of a third relay, the other end of the coil of the contactor is connected with any live wire output end of the first leakage protection switch through a normally open contact group of the first relay, the output ends of the live wires of the first leakage protection switch are correspondingly connected with the output ends of the phase wires of the three-phase power transmission line through a first normally open contact group of the contactor, one end of the test operation indicator lamp is electrically connected with any live wire connection outlet of the first leakage protection switch, and the other end of the test operation indicating lamp is connected with the zero line output end of the first leakage protection switch through a second normally open contact group of the contactor.
When the ground wire on-off detection is carried out, a ground wire on-off test button is pressed, a knife switch of a second leakage protection switch is closed, if the ground wire is a passage, the second leakage protection switch can automatically trip, a coil of a third relay is not electrified, a normally open contact group of the third relay is still in an off state, a ground wire off indicator lamp cannot be turned on, and a normally closed contact group of the third relay is in a closed state, so that a three-phase knife switch can be closed to enter a 'preparation' state of a high-voltage test;
if the ground wire is broken, the second earth leakage protection switch cannot automatically trip, a coil of the third relay is electrified, a normally open contact group of the third relay is in a closed state, an earth wire disconnection indicating lamp is lightened, a normally closed contact group of the third relay is in an open state, and a coil of the contactor cannot be electrified, so that a first normally open contact group of the contactor on the three-phase power transmission line is still in an open state, even if the first earth leakage protection switch and the three-phase disconnecting link are all closed, the output end of the three-phase power transmission line cannot be electrified, the effect of protecting workers is achieved, the workers can judge whether the ground wire has problems according to the state of the earth wire disconnection indicating lamp, if the ground wire is broken, the earth wire disconnection indicating lamp is turned off after the problems are solved, and high-voltage test can be carried out to ensure personal safety.
When ground wire disconnection pilot lamp goes out, close three-phase switch, get into high-voltage test's "preparation" state, rectification power supply circular telegram back, for the power supply of main control circuit board, make the coil circular telegram of first relay, the normally open contact group of first relay is the closure state, the coil circular telegram of contactor this moment, the first normally open contact group of contactor, second normally open contact group is the closure state, experimental operation pilot lamp lights, can close first earth leakage protection switch this moment, make the commercial power can follow three-phase transmission line's input and transmit the output, transmit in subsequent high-voltage testing equipment through the outside binding post of casing, get into high-voltage test.
In the high-voltage test, if the sensor for sensing a human body monitors that someone enters an electrified isolation region in the safety fence, the main control circuit board stops supplying power to the coil of the first relay, the normally open contact group of the first relay which is originally in a closed state can be immediately disconnected, and power transmission of high-voltage test equipment is stopped, so that the safety of personnel is guaranteed.
If the staff gets into the electrified isolation region and carries out test operation such as rewiring for equipment, other staff's mistake close the three-phase switch, first earth leakage protection switch closes, and high-voltage testing equipment still can not the circular telegram, greatly reduced the potential safety hazard.
Preferably, the remote control device comprises a wireless remote controller, wherein a remote control signal receiving module is arranged on the main control circuit board and used for receiving signals sent by the wireless remote controller, and the sensor used for sensing a human body is switched between an on state and an off state through remote control signals.
Preferably, the signal input part of main control circuit board is connected with a proximity switch electricity that is used for responding to the security fence state to guarantee that only when security fence's state is closed, the high-voltage testing equipment power transmission just can be given to the three-phase power transmission line, if security fence has not placed, when security fence's state was for opening, proximity switch sends the signal and gives main control circuit board, main control circuit board stops the coil power supply for first relay, the normally open contact group of the first relay that is in closed state originally can break off at once, stop for the power transmission of high-voltage testing equipment, in order to guarantee personnel's safety.
Preferably, the signal output part of the main control circuit board is electrically connected with an alarm device, and if the sensor monitors that a person enters an electrified isolation area in the safety fence, the main control circuit board gives an alarm through the alarm device to draw the attention of workers.
Preferably, a second relay is arranged between any wire outlet end of the three-phase disconnecting link and a zero line access end of the first leakage protection switch, one end of a coil of the second relay is electrically connected with the zero line access end of the first leakage protection switch, and the other end of the coil of the second relay is electrically connected with any wire outlet end of the three-phase disconnecting link and used for controlling the states of the power supply safety indicator lamp and the preparation indicator lamp.
A power safety indicator lamp is arranged between the zero line access end of the first electric leakage protection switch and the input end of any phase line of the three-phase power transmission line, one end of the power safety indicator lamp is connected with the input end of any phase line of the three-phase power transmission line through a normally closed contact group of a second relay, the other end of the power safety indicator lamp is connected with the zero line access end of the first electric leakage protection switch, and a worker can judge whether the induction detection unit is electrified or not through the state of the power safety indicator lamp.
Preferably, be equipped with one between arbitrary live wire incoming end, the zero line incoming end of first earth leakage protection switch and prepare the pilot lamp, prepare and set gradually the normally open contact group of second relay, the normally closed contact group of contactor between the one end of pilot lamp and arbitrary live wire incoming end of first earth leakage protection switch, prepare the other end of pilot lamp and be connected with the zero line incoming end electricity of first earth leakage protection switch, whether staff can judge the circular telegram control unit through the state of preparing the pilot lamp and switch on to whether the affirmation gets into work on next step.
Preferably, an emergency stop switch is arranged between the normally open contact group of the first relay and any live wire connection and disconnection end of the first leakage protection switch, and a button of the emergency stop switch is arranged outside the casing so that a worker can forcibly stop supplying power to subsequent high-voltage test equipment by pressing the button rapidly in an emergency.
Preferably, two ends of the normally closed contact group of the third relay are respectively connected with an inlet end and an outlet end of the third leakage protection switch, that is, one end of the coil of the contactor is connected with a zero line output end of the first leakage protection switch through the third leakage protection switch, the inlet end of the third leakage protection switch is connected with the zero line output end of the first leakage protection switch, the outlet end of the third leakage protection switch is connected with one end of the coil of the contactor, and in other tests without an external ground wire, the third leakage protection switch can be switched on to forcibly transmit power.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic view of the present invention.
Detailed Description
As shown in fig. 1 to 2, an alarm control system of a high-voltage test safety fence includes a casing 1, a three-phase power transmission line and a ground wire are arranged in a casing of the casing 1, a three-phase disconnecting link HK is arranged between an input end and an output end of the three-phase power transmission line, and first leakage protection switches QF-1 are arranged between the three-phase disconnecting link HK and the output end of the three-phase power transmission line and on the ground wire. A ground wire on-off detection unit is arranged between the input end of any phase wire of the three-phase power transmission line and a ground wire, an induction detection unit is arranged between the three-phase disconnecting link HK and the first leakage protection switch QF-1, an electrifying control unit is arranged between the first leakage protection switch QF-1 and the output end of the three-phase power transmission line and on the ground wire, and the input end and the output end of the three-phase power transmission line and the input end and the output end of the ground wire are correspondingly and electrically connected with a plurality of wiring terminals arranged outside a shell of the shell 1.
In this embodiment, the ground wire on-off detection unit includes a ground wire off indicator lamp 5 and a third relay J3, the third relay J3 and the ground wire off indicator lamp 5 are both arranged between the input end of any phase line of the three-phase power transmission line and the zero line access end of the first leakage protection switch QF-1, one end of the ground wire off indicator lamp 5 is connected with any incoming line end of the three-phase disconnecting link HK through the normally open contact set of the third relay J3, the other end of the ground wire off indicator lamp 5 is electrically connected with the zero line access end of the first leakage protection switch QF-1, the zero line access end of the first leakage protection switch QF-1 is electrically connected with one end of the coil of the third relay J3, the other end of the coil of the third relay J3 is connected with the input end of any phase line of the three-phase power transmission line through the second leakage protection switch QF-2, and a phase line of the second leakage protection switch QF-2 is arranged between the input end of any phase line of the three-phase power transmission line and the input end of the three-phase power transmission line Ground on off test button 6.
The induction detection unit comprises a main control circuit board 2, a signal input end of the main control circuit board 2 is electrically connected with a sensor 3 for inducing a human body, a signal output end of the main control circuit board 2 is electrically connected with a coil of a first relay J1, a power supply input end of the main control circuit board 2 is electrically connected with an output end of a rectification power supply 4, and the rectification power supply 4 is arranged between any one of the outlet ends of the three-phase disconnecting link HK and the zero line access end of the first leakage protection switch QF-1;
in this embodiment, the main control circuit board 2 is a PLC controller, and a remote control signal receiving module is provided on the main control circuit board 2, and is configured to receive a signal sent by a wireless remote controller, and switch the sensor 3 for sensing a human body between an on state and an off state through a remote control signal.
The signal input part of main control circuit board 2 is connected with a proximity switch 9 electricity that is used for responding to the security fence state, in order to guarantee that only security fence's state is when closed, just can give the power transmission of high-voltage testing equipment, if security fence does not place, security fence's state is when opening, proximity switch 9 sends a signal and gives main control circuit board 2, main control circuit board 2 stops the coil power supply for first relay J1, the normally open contact group of the first relay J1 that is in the closure state originally can break off at once, stop giving the power transmission of high-voltage testing equipment, in order to guarantee personnel's safety.
The signal output end of the main control circuit board 2 is electrically connected with an alarm device 10, if the sensor 3 monitors that a person enters an electrified isolation area in the safety fence, the main control circuit board 2 sends an alarm through the alarm device 10 to attract the attention of a worker, and in the embodiment, the alarm device 10 is a buzzer.
The power-on control unit is arranged between any live wire connection and output end of the first leakage protection switch QF-1 and a zero wire connection and output end, the power-on control unit comprises a test operation indicator lamp 7 and a contactor KM, one end of a coil of the contactor KM is connected with the zero wire connection and output end of the first leakage protection switch QF-1 through a normally closed contact group of a third relay J3, the other end of the coil of the contactor KM is connected with any live wire connection and output end of the first leakage protection switch QF-1 through a normally open contact group of a first relay J1, each live wire connection and output end of the first leakage protection switch QF-1 is correspondingly connected with the output end of each phase wire of the three-phase power transmission line through a first normally open contact group of the contactor KM, one end of the test operation indicator lamp 7 is electrically connected with any live wire connection and output end of the first leakage protection switch QF-1, the other end of the test operation indicating lamp 7 is connected with the zero line output end of the first leakage protection switch QF-1 through a second normally open contact group of the contactor KM.
In this embodiment, a second relay J2 is disposed between any one of the outlet terminals of the three-phase disconnecting link HK and the zero line access terminal of the first leakage protection switch QF-1, a power safety indicator 11 is disposed between the zero line access terminal of the first leakage protection switch QF-1 and the input terminal of any one of the phase lines of the three-phase power transmission line, one end of the power safety indicator 11 is connected to the input terminal of any one of the phase lines of the three-phase power transmission line through the normally closed contact group of the second relay J2, the other end of the power safety indicator 11 is connected to the zero line access terminal of the first leakage protection switch QF-1, and a worker can determine whether the induction detection unit is powered on or not through the state of the power safety indicator 11.
A preparation indicator lamp 12 is arranged between any live wire access end and zero line access end of the first leakage protection switch QF-1, a normally open contact group of the second relay J2 and a normally closed contact group of the contactor KM are sequentially arranged between one end of the preparation indicator lamp 12 and any live wire access end of the first leakage protection switch QF-1, the other end of the preparation indicator lamp 12 is electrically connected with the zero line access end of the first leakage protection switch QF-1, and a worker can judge whether the power-on control unit is powered on or not through the state of the preparation indicator lamp 12 so as to determine whether to enter the next step of work or not.
In this embodiment, the input and the output of three phase transmission line, earth connection all correspond with a plurality of binding post that set up in casing 1 casing outside and be connected the electricity, the binding post of L1 end, L2 end, L3 end is connected gradually to three phase transmission line's input, the binding post of A end, B end, C end is connected gradually to three phase transmission line's output, the binding post of N end is connected to the input of neutral conductor, the binding post of O end is connected to the output of neutral conductor, the ground terminal that sets up at casing 1 casing outside is connected respectively at the both ends of earth connection.
When the ground wire on-off detection is carried out, the ground wire on-off test button 6 is pressed, and a knife switch of the second leakage protection switch QF-2 is closed, in the embodiment, the grounding resistance is smaller than 40 omega, namely, the ground wire is a passage, the second leakage protection switch QF-2 can automatically trip, a coil of the third relay J3 is not electrified, a normally open contact group of the third relay J3 is still in an off state, the ground wire off indicator lamp 5 cannot be lightened, a normally closed contact group of the third relay J3 is in a closed state, and the three-phase knife brake HK can be closed to enter a 'preparation' state of a high-voltage test;
in this embodiment, the ground resistance is greater than 40 Ω, i.e. the ground wire is an open circuit, the second leakage protection switch QF-2 does not automatically trip, the coil of the third relay J3 is energized, the normally open contact group of the third relay J3 is in a closed state, the ground wire disconnection indicator lamp 5 is on, the normally closed contact group of the third relay J3 is in an open state, the coil of the contactor KM is not energized, so the first normally open contact group of the contactor KM on the three-phase power transmission line is still in an open state, even if the first leakage protection switch QF-1 and the three-phase disconnecting link HK are all closed, the output end of the three-phase power transmission line can not be electrified, thereby protecting the working personnel, and the working personnel can judge whether the ground wire has problems according to the state of the ground wire disconnection indicating lamp 5, if the ground wire is broken, then, after the problem must be solved, the ground wire disconnection indicating lamp 5 is turned off, and the high voltage test can be performed to ensure the personal safety.
When the ground wire disconnection indicating lamp 5 is turned off, the three-phase disconnecting link HK is turned on, the high-voltage test enters a 'preparation' state, after the rectification power supply 4 is electrified, the main control circuit board 2 is powered, the coil of the first relay J1 is electrified, the normally open contact group of the first relay J1 is in a closed state, the coil of the contactor KM is electrified at the moment, the first normally open contact group and the second normally open contact group of the contactor KM are in a closed state, the test operation indicating lamp 7 is turned on, the first leakage protection switch QF-1 can be turned on at the moment, the mains supply can be transmitted to the output end from the input end of the three-phase power transmission line, the mains supply is transmitted to subsequent high-voltage test equipment through the wiring terminal outside the casing 1, and the high-voltage test enters.
In high-voltage testing, if the sensor 3 for responding to the human body monitors that someone gets into the electrified isolation region in the security fence, main control circuit board 2 stops the coil power supply for first relay J1, and the normally open contact group of the first relay J1 that is in the closure state originally can break off at once, stops to give the power transmission of high-voltage testing equipment to guarantee personnel's safety.
If the working personnel enter the electrified isolation area to carry out test operation such as rewiring of the equipment, other working personnel mistakenly close the three-phase disconnecting link HK and the first leakage protection switch QF-1, the high-voltage test equipment still cannot be electrified, and potential safety hazards are greatly reduced.
In this embodiment, an emergency stop switch 13 is disposed between the normally open contact group of the first relay J1 and any one of the live wire terminals of the first leakage protection switch QF-1, and a button of the emergency stop switch 13 is disposed outside the casing 1, so that a worker can forcibly stop supplying power to subsequent high-voltage test equipment by pressing the button quickly in an emergency.
Two ends of the normally closed contact group of the third relay J3 are respectively connected with an incoming line end and an outgoing line end of a third leakage protection switch QF-3, namely, one end of a coil of the contactor KM is connected with a zero line connecting outgoing end of the first leakage protection switch QF-1 through the third leakage protection switch QF-3, namely, the incoming line end of the third leakage protection switch QF-3 is connected with an output end of a grounding line, the outgoing line end of the third leakage protection switch QF-3 is connected with one end of the coil of the contactor KM, and in other tests without an external grounding line, the third leakage protection switch QF-3 can be closed to forcibly transmit power.
In the embodiment, an uncontrolled power supply seat and a controlled power supply seat are arranged, and the controlled power supply seat can be arranged between the output end of a three-phase power transmission line and the output end of a grounding line and can be controlled by a contactor KM;
the uncontrolled power supply seat can be arranged between the three-phase disconnecting link HK and the first leakage protection switch QF-1 and on a grounding wire, and whether the uncontrolled power supply seat is electrified or not is not controlled by the contactor KM and is only controlled by the three-phase disconnecting link HK.
Before the high-pressure test, the operation steps of the invention are as follows:
1) the input ends and the output ends of the three-phase power transmission line, the grounding line and the neutral line are sequentially connected with the grounding terminals outside the shell of the machine shell 1 in a one-to-one correspondence mode.
2) The high-voltage test equipment is electroless at this moment, and staff can operate the change to the circuit of high-voltage test equipment.
3) After the operation of the working personnel is finished, the second leakage protection switch QF-2 is switched on, the ground wire on-off test button 6 is pressed, the ground wire off indicator lamp 5 is lightened, and the ground wire is judged to be an open circuit:
if the second leakage protection switch QF-2 automatically trips, the grounding resistance is smaller than 40 omega, namely the grounding wire is a passage, the grounding wire disconnection indicator lamp 5 is extinguished, and the high-voltage test is in a 'preparation' state;
if the second leakage protection switch QF-2 is not tripped, the grounding resistance is larger than 40 omega, the grounding wire is in fault, the grounding wire is possibly broken, or the grounding resistance is unqualified, and at the moment, the grounding wire disconnection indicator lamp 5 is turned on and needs a worker to overhaul the grounding wire;
and thirdly, a third leakage protection switch QF-3 can be used to forcibly send points under the condition of not connecting a ground wire.
4) In a 'preparation' state of a high-voltage test, the fact that no person exists in the electrified isolation area of the safety fence is confirmed, the safety fence is closed, the three-phase disconnecting link HK is closed, the preparation indicator lamp 12 is turned on, the uncontrolled power supply base is electrified, and the controlled power supply base is not electrified.
5) When the first leakage protection switch QF-1 is turned on, the preparation indicator lamp 12 is turned off, the test operation indicator lamp 7 is turned on, the uncontrolled power supply seat and the controlled power supply seat are electrified, and the connecting terminals at the input end and the output end of the three-phase power transmission line are electrified, so that the required power supply can be provided for a high-voltage test instrument.
After the first leakage protection switch QF-1 is turned on, a wireless remote controller is used for sending a warning start command to the main control circuit board 2 immediately, the main control circuit board 2 enters a warning monitoring state, if a person opens the safety fence and even breaks into the safety fence, the power supply is automatically cut off by the command sent by the main control circuit board 2, and an alarm is sent by a buzzer to prompt a worker that the person breaks into the safety fence.
6) After the test is finished, the power supplies of all the test instruments are turned off, and then the first leakage protection switch QF-1 and the three-phase disconnecting link HK are turned off in sequence.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and modifications of the present invention by those skilled in the art can be made without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides an alarm control system of high-voltage testing security fence, its characterized in that, includes a casing, be equipped with three-phase power transmission line and earth connection in the casing, set up the three-phase switch between the input of three-phase power transmission line and the output, set up first earth leakage protection switch between three-phase switch and the three-phase power transmission line output and on the earth connection, set up a ground wire break-make detecting element between the input of any phase line of three-phase power transmission line and the earth connection, set up an induction detecting element between three-phase switch and the first earth leakage protection switch, set up a circular telegram control unit between first earth leakage protection switch and the three-phase power transmission line output and on the earth connection, the input and the output of three-phase power transmission line, earth connection all correspond the electricity with a plurality of binding post that set up in the casing outside and are connected.
2. The alarm control system of the high-voltage test safety fence as claimed in claim 1, wherein: the ground wire on-off detection unit comprises a ground wire off indicator light and a third relay, the third relay and the ground wire off indicator light are both arranged between the input end of any phase line of the three-phase power transmission line and the zero line access end of the first leakage protection switch, one end of the ground wire disconnection indicating lamp is connected with any wire inlet end of the three-phase disconnecting link through a normally open contact group of a third relay, the other end of the ground wire disconnection indicating lamp is electrically connected with the zero line access end of the first leakage protection switch, the zero line access end of the first leakage protection switch is electrically connected with one end of a coil of the third relay, the other end of the coil of the third relay is connected with the input end of any phase line of the three-phase transmission line through a second leakage protection switch, and a ground wire on-off test button is arranged between the second leakage protection switch and the input end of any phase line of the three-phase power transmission line.
3. The alarm control system of the high-voltage test safety fence as claimed in claim 1, wherein: the induction detection unit comprises a main control circuit board, a signal input end of the main control circuit board is electrically connected with a sensor for inducing a human body, a signal output end of the main control circuit board is electrically connected with a coil of the first relay, a power supply input end of the main control circuit board is electrically connected with an output end of a rectification power supply, and the rectification power supply is arranged between any wire outlet end of the three-phase disconnecting link and a zero line access end of the first leakage protection switch;
the electrifying control unit is arranged between any live wire connecting and outputting end and the zero wire connecting and outputting end of the first leakage protection switch, the power-on control unit comprises a test operation indicator light and a contactor, one end of a coil of the contactor is connected with the zero line output end of the first leakage protection switch through a normally closed contact group of a third relay, the other end of the coil of the contactor is connected with any live wire output end of the first leakage protection switch through a normally open contact group of the first relay, the output ends of the live wires of the first leakage protection switch are correspondingly connected with the output ends of the phase wires of the three-phase power transmission line through a first normally open contact group of the contactor, one end of the test operation indicator lamp is electrically connected with any live wire connection outlet of the first leakage protection switch, and the other end of the test operation indicating lamp is connected with the zero line output end of the first leakage protection switch through a second normally open contact group of the contactor.
4. The alarm control system of the high-voltage test safety fence as claimed in claim 3, wherein the alarm control system comprises a wireless remote controller, and a remote control signal receiving module is arranged on the main control circuit board and used for receiving signals sent by the wireless remote controller.
5. The alarm control system of the high-voltage test safety fence as claimed in claim 3, wherein: and the signal input end of the main control circuit board is electrically connected with a proximity switch for sensing the state of the safety fence.
6. The alarm control system of the high-voltage test safety fence as claimed in claim 3, wherein: and the signal output end of the main control circuit board is electrically connected with an alarm device.
7. The alarm control system of the high-voltage test safety fence as claimed in claim 3, wherein: a second relay is arranged between any outlet end of the three-phase disconnecting link and a zero line access end of the first leakage protection switch, a power safety indicator lamp is arranged between the zero line access end of the first leakage protection switch and the input end of any phase line of the three-phase power transmission line, and one end of the power safety indicator lamp is connected with the input end of any phase line of the three-phase power transmission line through a normally closed contact group of the second relay.
8. The alarm control system of the high-voltage test safety fence as claimed in claim 7, wherein: a preparation indicator lamp is arranged between any live wire access end and zero line access end of the first leakage protection switch, and a normally open contact group of the second relay and a normally closed contact group of the contactor are sequentially arranged between one end of the preparation indicator lamp and any live wire access end of the first leakage protection switch.
9. The alarm control system of the high-voltage test safety fence as claimed in claim 3, wherein: and an emergency stop switch is arranged between the normally open contact group of the first relay and any live wire connecting and outputting end of the first leakage protection switch.
10. The alarm control system of the high-voltage test safety fence as claimed in claim 3, wherein: and two ends of the normally closed contact group of the third relay are respectively connected with the wire inlet end and the wire outlet end of the third leakage protection switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210187950.4A CN114783154B (en) | 2022-02-28 | 2022-02-28 | Alarm control system of high-voltage test safety fence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210187950.4A CN114783154B (en) | 2022-02-28 | 2022-02-28 | Alarm control system of high-voltage test safety fence |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114783154A true CN114783154A (en) | 2022-07-22 |
| CN114783154B CN114783154B (en) | 2024-08-23 |
Family
ID=82423272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210187950.4A Active CN114783154B (en) | 2022-02-28 | 2022-02-28 | Alarm control system of high-voltage test safety fence |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114783154B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100073178A1 (en) * | 2007-09-30 | 2010-03-25 | Huadao Huang | Novel circuit interrupting device with high voltage surge protection |
| CN101877477A (en) * | 2009-05-01 | 2010-11-03 | 杨树昌 | Leakage protection switch for preventing three-phase power circuit from generating high voltage |
| CN206209354U (en) * | 2016-12-02 | 2017-05-31 | 南京思能电气有限公司 | Power high voltage based on embedded remote control module tests portable protection power supply box |
| CN109471002A (en) * | 2018-08-27 | 2019-03-15 | 国网浙江嘉善县供电有限公司 | The anti-error system of cable voltage test |
| CN111983396A (en) * | 2020-07-16 | 2020-11-24 | 中广核核电运营有限公司 | Electric high-voltage test area safety protection system |
| CN112557944A (en) * | 2020-11-18 | 2021-03-26 | 广西电网有限责任公司电力科学研究院 | Distribution network capacitance current test operating rod |
-
2022
- 2022-02-28 CN CN202210187950.4A patent/CN114783154B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100073178A1 (en) * | 2007-09-30 | 2010-03-25 | Huadao Huang | Novel circuit interrupting device with high voltage surge protection |
| CN101877477A (en) * | 2009-05-01 | 2010-11-03 | 杨树昌 | Leakage protection switch for preventing three-phase power circuit from generating high voltage |
| CN206209354U (en) * | 2016-12-02 | 2017-05-31 | 南京思能电气有限公司 | Power high voltage based on embedded remote control module tests portable protection power supply box |
| CN109471002A (en) * | 2018-08-27 | 2019-03-15 | 国网浙江嘉善县供电有限公司 | The anti-error system of cable voltage test |
| CN111983396A (en) * | 2020-07-16 | 2020-11-24 | 中广核核电运营有限公司 | Electric high-voltage test area safety protection system |
| CN112557944A (en) * | 2020-11-18 | 2021-03-26 | 广西电网有限责任公司电力科学研究院 | Distribution network capacitance current test operating rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114783154B (en) | 2024-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101964130B (en) | Temperature measuring type electrical fire monitoring system | |
| EA030501B1 (en) | Coal mine remote leakage test method and device | |
| CN108604494A (en) | Real-time detection/repair system when power distribution system source line fault and its construction method | |
| CN107086537B (en) | Prevent the disconnecting device and cutting-off method of the debugging primary equipment electrification of substation's relay protection | |
| CN106787222B (en) | Main transformer neutral point grounding disconnecting link remote control circuit | |
| CN104466943A (en) | Security method and device for electrical installation | |
| CN211293018U (en) | Novel ammeter case is prevented fires device | |
| CN116092260A (en) | Electrical fire monitoring method and system based on image acquisition | |
| CN203535152U (en) | Hidden defect detection device for external starting contact of failure protection | |
| CN106680708B (en) | Electrical life test monitoring protection device of low-voltage alternating current breaker and application thereof | |
| CN210778323U (en) | Power distribution network ring main unit anti-misconnection grounding knife switch forced locking device | |
| CN107247217A (en) | A kind of distribution network fault positioning device | |
| CN111983396A (en) | Electric high-voltage test area safety protection system | |
| CN114783154B (en) | Alarm control system of high-voltage test safety fence | |
| CN207010200U (en) | Prevent the powered shearing device of transformer station's relay protection debugging primary equipment | |
| CN213619449U (en) | 27.5kV intelligent grounding device of alternating-current traction power supply system | |
| CN204595140U (en) | A kind of interior distribution device ground connection audible-visual annunciator | |
| CN109802360B (en) | Error-closing prevention controller for wind driven generator | |
| CN206945889U (en) | A kind of distribution network fault positioning device | |
| CN209072044U (en) | A kind of starter starting test protective device | |
| CN112180894A (en) | Electric performance detection device for pole-mounted circuit breaker controller | |
| CN207410113U (en) | A kind of power distribution cabinet failure monitoring system | |
| CN117878822B (en) | Relay protection conversion device, circuit detection method and teaching method | |
| CN102035195B (en) | Automatic ground protective device for light rail garage power and control method thereof | |
| CN107247226B (en) | Substation remote control loop safety acceptance device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |