CN105470941A - Safety switch-on apparatus for 10kv step-down transformer - Google Patents
Safety switch-on apparatus for 10kv step-down transformer Download PDFInfo
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- CN105470941A CN105470941A CN201510908220.9A CN201510908220A CN105470941A CN 105470941 A CN105470941 A CN 105470941A CN 201510908220 A CN201510908220 A CN 201510908220A CN 105470941 A CN105470941 A CN 105470941A
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- down transformer
- insulation resistance
- high voltage
- resistance tester
- voltage isolator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/005—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too low isolation resistance, too high load, short-circuit; earth fault
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
Abstract
The invention relates to a safety switch-on apparatus for a 10kv step-down transformer, and belongs to the field of power transmission and supply devices. The apparatus comprises a relay, an electromagnetic lock, an insulation resistance tester and a controller, wherein the insulation resistance tester comprises a line end, a ground end, a signal end and a shielding end; the line end of the insulation resistance tester is connected with the output end of the 10kv step-down transformer; the shielding end is connected with a transformer case; the ground end is grounded; the controller controls the switch-on and switch-off states of the insulation resistance tester, the relay or an electromagnetic valve, and receives a detection signal of the insulation resistance tester; and an electromagnetic lock is arranged on a switch on the primary side of the 10kv step-down transformer and used for locking or unlocking an off state of the switch. The apparatus is suitable for the use of newly produced transformers and the improvement and installation of existing 10kv transformers, enhances the universality and safety of the transformers and reduces potential safety hazards of 10kv power grids.
Description
Technical field
The present invention relates to a kind of safety closing device for 10kv step-down transformer, belong to transmission of electricity power supply unit field.
Background technology
Transformer is made up of iron core (or magnetic core) and coil, and coil has two or more winding, and wherein connect the winding of power supply primary coil, remaining winding is secondary coil.It can convert alternating voltage, electric current and impedance.The iron core that the simplest iron-core transformer is made by a soft magnetic material and be enclosed within two numbers of turn on iron core coil not etc. and form.Insulation resistance represents the insulation property between each coil of transformer, between each coil and iron core.The height of insulation resistance and the performance of used insulating material, temperature height are relevant with moist degree.
10kv transformer, when being energized, because person works's error or other factors cause the short circuit of transformer or the transformer short-circuit of its load patch, easily may cause security incident; Particularly for the 10kv transformer of outdoor application, due to its supply line head, maintenance cycle is long, easily when being energized because the circuit isolation resistance of transformer or its power supply shortly causes security incident, affect power grid security.
Summary of the invention
The object of the invention is to: for above-mentioned Problems existing, a kind of safety closing device for 10kv step-down transformer is provided, this apparatus structure is simple, easy to use, there is stronger generalization, be not only applicable to coming into operation of the transformer of new production, simultaneously, be applicable to improvement and the installation of existing 10kv transformer, strengthen versatility and the fail safe of transformer, the potential safety hazard of less 10kv electrical network.This device is applicable to the 10kv step-down transformer of community or open air, effectively can reduce the safety because of transformer insulating properties less harmful electrical network own and transformer, also can avoid the low fail safe affecting equipment of the insulating properties of the cable that it is connected with transformer, effective guarantee 10kv step-down transformer uses normally simultaneously.
The technical solution used in the present invention is as follows:
The invention discloses a kind of safety closing device for 10kv step-down transformer, comprise relay, electromagnetic lock, Insulation Resistance Tester and controller, Insulation Resistance Tester comprise line end, hold, signal end and shielding end, the line end of Insulation Resistance Tester is connected with the output of 10kv step-down transformer by relay, shield hold connection transformer housing, hold ground connection; Controller controls the keying of Insulation Resistance Tester, relay or electromagnetically operated valve and receives the detection signal of Insulation Resistance Tester; On the switch that electromagnetic lock is arranged on 10kv step-down transformer primary side and for the off-state locking of this switch or unlock.
Further, described switch is high voltage isolator, the mode that this high voltage isolator adopts machinery to open and close, this high voltage isolator comprises moving knife, stationary knife, knife rest, moving knife and stationary knife are connected on knife rest respectively by insulation column, moving knife is connected with power transmission shaft, and this power transmission shaft is for controlling the closed of moving knife or opening.
Further, described electromagnetic lock is fixed on knife rest, and the off-state of high voltage isolator is locked or unblock by locking power transmission shaft by this electromagnetic lock.
Further, described controller adopts 12v storage battery to power, and this storage battery is connected with civil power by transformer.
Further, the output of described transformer is connected with air switch, and the output of air switch is connected with load.
Further, described 10kv step-down transformer is once connected to 10kv electrical network by high voltage isolator, circuit breaker, high voltage isolator.
Further, described controller comprises MCU, display, keyboard and communicator; MCU is connected with display, keyboard and communicator respectively.
Due to said structure, Insulation Resistance Tester is connected at the secondary side of 10kv step-down transformer, can detect the insulating properties of transformer before transformer energising, ensure transformer fail safe in use, ensure fail safe during transformer energising, the fail safe at electrical network said by effective guarantee transformer, when the insulation resistance size of transformer does not meet the regulation of energising, electromagnetic lock action is controlled by its controller, electromagnetic lock locks the switch be located on front side of transformer, it is made to close, effectively can ensure that transformer is energized when good insulating, be specially adapted to the step-down transformer that outdoor 10kv inputs and 220v exports, this application scenarios can ensure that equipment completes the detection of insulation resistance before energising, avoid because transformer insulated property is bad and cause the situation of grid short circuit, the fail safe of guarantee equipment, its isolating switch is as the locking mechanism of electromagnetic lock, because the distance of isolating switch distance step-down transformer is minimum, can be less because the defect on the long control progress ground caused of electromagnetic lock control circuit, ensure the fail safe of the use of its electromagnetic lock, the normal use of equipment can be ensured, the controller of this device adopts independently power supply, the usability affecting equipment because of the circuit power-off of remote power feeding can be avoided, the controller of this device adopts the control of MCU, the unblock resistance value of electromagnetic lock can be set as required, this device is that community is when powering, detect the safety in utilization of transformer and community circuit thereof, prevent community fire, avoid the fail safe using and affect 10kv electrical network affecting step-down transformer because of the power grid environment of community complexity.
Further, its safety closing system comprises:
Control unit, comprises MCU, display, keyboard and communicator; MCU is connected with display, keyboard and communicator respectively;
Electrical network unit, comprise 10kv electrical network, high voltage isolator, circuit breaker, 10kv step-down transformer, air switch, load, 10kv electrical network is connected with the primary side of circuit breaker with 10kv step-down transformer by high voltage isolator, and the secondary side of 10kv step-down transformer is connected with load by air switch;
Resistance detection unit, comprise relay, controller, Insulation Resistance Tester, Insulation Resistance Tester comprise line end, hold, signal end and shielding end, the line end of Insulation Resistance Tester is connected with the output of 10kv step-down transformer by relay, shield hold connection transformer housing, hold ground connection; Controller is connected with the control end of relay, Insulation Resistance Tester signal end respectively, and controller controls the keying of Insulation Resistance Tester or relay and receives the detection signal of Insulation Resistance Tester;
Electromagnetic lock unit, comprise electromagnetic lock, electromagnetic lock is with lock house, electromagnetic lock is arranged on high voltage isolator, the mode that this high voltage isolator adopts machinery to open and close, this high voltage isolator comprises moving knife, stationary knife, knife rest, and moving knife and stationary knife are connected on knife rest respectively by insulation column, moving knife is connected with power transmission shaft, and this power transmission shaft is for controlling the closed of moving knife or opening; Power transmission shaft is provided with through hole or blind hole, during high voltage isolator off-state, the through hole on power transmission shaft or blind hole relative; The collapsing length of the lock house of this electromagnetic lock is 4-6cm;
Load unit, comprises air switch and load, and air switch input is connected with the secondary side of 10kv step-down transformer, output is connected with load;
Control unit respectively with resistance detection unit and electromagnetic lock unit, control unit judges whether the insulating resistance value that resistance detection unit detects reaches set point, controls the locking of electromagnetic lock unit or unlocks the off-state of high voltage isolator.
Due to said system, electromagnetic lock unit is controlled by MCU, resistance detection unit interoperation, transformer output is all carried out to the detection of insulation resistance at load condition and Light Condition, when the detected value of insulation resistance does not meet the regulation of setting extremely, the high voltage isolator of transformer primary side is locked as the fail safe that off-state effectively ensures to be energized, during the transformer access electrical network avoiding insulating properties not high, affect the fail safe of 10kv electrical network, native system is more applicable to the step-down transformer that 10kv is depressurized to 220v, the especially community step-down transformer of powering, due to the complex circuit of community electrical network, circuit in community easily causes short circuit, in this case, the necessity of carrying out Insulation monitoring before access electrical network just highlights out, the normal use of equipment can be ensured, ensure the fail safe of 10kv step-down transformer access.
Further, the control method of its safety closing system:
Step 1: the high voltage isolator and the circuit breaker that detect the primary side of 10kv step-down transformer are in off-state, the air switch detecting the secondary side of 10kv step-down transformer disconnects;
High voltage isolator is also locked as off-state by the action of step 2:MCU Controlling solenoid valve;
Step 3:MCU control relay closes, and controls Insulation Resistance Tester simultaneously and starts, detect the insulation resistance of 10kv step-down transformer Light Condition; The insulation resistance numerical value that Insulation Resistance Tester detects is sent to MCU and is shown by the display be connected with MCU;
Step 4: when the insulation resistance of 10kv step-down transformer Light Condition is less than 900 megaohm, MCU sends alarm signal by coupled communicator; When the insulation resistance of 10kv step-down transformer Light Condition is not less than 900 megaohm, MCU closed relay and Insulation Resistance Tester, then carry out electric discharge 1-2s to the secondary side of 10kv step-down transformer;
Step 5: the air switch of the secondary side of closed 10kv step-down transformer, MCU control relay closes, and controls Insulation Resistance Tester simultaneously and starts, detect the insulation resistance of 10kv step-down transformer load condition;
Step 6: when the insulation resistance of 10kv step-down transformer load condition is less than 200 megaohm, MCU sends alarm signal by coupled communicator; When the insulation resistance of 10kv step-down transformer load condition is not less than 200 megaohm, MCU closed relay and Insulation Resistance Tester, then to the secondary side electric discharge 1-1.5s of 10kv step-down transformer;
Step 7: when the insulation resistance of Insulation Resistance Tester detection 10kv step-down transformer load condition is not less than 200 megaohms, the insulation resistance of Light Condition is not less than 900 megaohm, MCU Controlling solenoid valve unlocks high voltage isolator, can close;
Step 8: the isolating switch disconnecting 10kv step-down transformer secondary side, then closes high voltage isolator, the circuit breaker of 10kv step-down transformer primary side successively, then the air switch not load electricity consumption of closed 10kv step-down transformer secondary side.
Owing to have employed said method, measure 10kv transformer its insulation resistance when zero load and be greater than 900 megaohms, avoid the insulating properties of 10kv step-down transformer itself inadequate, and endanger the fail safe of 10kv electrical network, after completing, detect the insulation resistance in the loaded situation of 10kv transformer belt, the resistance of its insulation resistance is greater than 200 megaohms, the insulating properties on the cable of load end can be ensured, the safe handling of raising equipment, in addition, this device can also be installed existing 10kv transformer, is conducive to the popularization of this device.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, this apparatus structure is simple, easy to use, has stronger generalization, be not only applicable to coming into operation of the transformer of new production, meanwhile, be applicable to improvement and the installation of existing 10kv transformer, strengthen versatility and the fail safe of transformer, the potential safety hazard of less 10kv electrical network.
2, this device is applicable to the 10kv step-down transformer of community or open air, effectively can reduce the safety because of transformer insulating properties less harmful electrical network own and transformer, also can avoid the low fail safe affecting equipment of the insulating properties of the cable that it is connected with transformer, effective guarantee 10kv step-down transformer uses normally simultaneously.
3, this device all carries out Insulation monitoring between each energising, avoids the situation of the cable after keeping in repair or the rear short circuit of transformer energising, avoids the safe handling of equipment.
Accompanying drawing explanation
Fig. 1 is the safety closing system construction drawing for 10kv step-down transformer in the present invention;
Mark in figure: 1-10kv electrical network, 2-circuit breaker, 3-high voltage isolator, 4-electromagnetic lock, 5-10kv step-down transformer 5,6-controller, 7-relay, 8-Insulation Resistance Tester, 9-air switch, 10-load.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
specific embodiment 1:
As shown in Figure 1, a kind of safety closing device for 10kv step-down transformer of the present invention, comprise relay 7, electromagnetic lock 4, Insulation Resistance Tester 8 and controller 6, Insulation Resistance Tester 8 comprise line end, hold, signal end and shielding end, the line end of Insulation Resistance Tester 8 is connected with the output of 10kv step-down transformer 5 by relay 7, shield hold connection transformer housing, hold ground connection; Controller 6 controls the keying of Insulation Resistance Tester 8, relay 7 or electromagnetically operated valve and receives the detection signal of Insulation Resistance Tester 8; On the switch that electromagnetic lock 4 is arranged on 10kv step-down transformer 5 primary side and for the off-state locking of this switch or unlock.Switch is high voltage isolator 3, the mode that this high voltage isolator 3 adopts machinery to open and close, this high voltage isolator 3 comprises moving knife, stationary knife, knife rest, moving knife and stationary knife are connected on knife rest respectively by insulation column, moving knife is connected with power transmission shaft, and this power transmission shaft is for controlling the closed of moving knife or opening.Electromagnetic lock 4 is fixed on knife rest, and the off-state of high voltage isolator 3 is locked or unblock by locking power transmission shaft by this electromagnetic lock 4.Controller 6 adopts 12v storage battery to power, and this storage battery is connected with civil power by transformer.The output of transformer is connected with air switch 9, and the output of air switch 9 is connected with load 10.10kv step-down transformer 5 is once connected to 10kv electrical network 1 by high voltage isolator 3, circuit breaker 2, high voltage isolator 3.Controller 6 comprises MCU, display, keyboard and communicator; MCU is connected with display, keyboard and communicator respectively.
Due to said structure, Insulation Resistance Tester 8 is connected at the secondary side of 10kv step-down transformer 5, can detect the insulating properties of transformer before transformer energising, ensure transformer fail safe in use, ensure fail safe during transformer energising, the fail safe at electrical network 1 said by effective guarantee transformer, when the insulation resistance size of transformer does not meet the regulation of energising, electromagnetic lock 4 action is controlled by its controller 6, electromagnetic lock 4 locks the switch be located on front side of transformer, it is made to close, effectively can ensure that transformer is energized when good insulating, be specially adapted to the step-down transformer that outdoor 10kv inputs and 220v exports, this application scenarios can ensure that equipment completes the detection of insulation resistance before energising, avoid because transformer insulated property is bad and cause the situation of electrical network 1 short circuit, the fail safe of guarantee equipment, its isolating switch 3 is as the locking mechanism of electromagnetic lock 4, because isolating switch 3 is minimum apart from the distance of step-down transformer, can be less because the defect on the long control progress ground caused of electromagnetic lock 4 control circuit, ensure the fail safe of the use of its electromagnetic lock 4, the normal use of equipment can be ensured, the controller 6 of this device adopts independently power supply, the usability affecting equipment because of the circuit power-off of remote power feeding can be avoided, the controller 6 of this device adopts the control of MCU, the unblock resistance value of electromagnetic lock 4 can be set as required, this device is that community is when powering, detect the safety in utilization of transformer and community circuit thereof, prevent community fire, avoid the fail safe using and affect 10kv electrical network 1 affecting step-down transformer because of electrical network 1 environment of community complexity.
specific embodiment 2:
As shown in Figure 1, the safety closing device for 10kv step-down transformer according to embodiment 1, its safety closing system comprises:
Control unit, comprises MCU, display, keyboard and communicator; MCU is connected with display, keyboard and communicator respectively;
Electrical network unit, comprise 10kv electrical network 1, high voltage isolator 3, circuit breaker 2,10kv step-down transformer 5, air switch 9, load 10,10kv electrical network 1 is connected with the primary side of circuit breaker 2 with 10kv step-down transformer 5 by high voltage isolator 3, and the secondary side of 10kv step-down transformer 5 is connected with load 10 by air switch 9;
Resistance detection unit, comprise relay 7, controller 6, Insulation Resistance Tester 8, Insulation Resistance Tester 8 comprise line end, hold, signal end and shielding end, the line end of Insulation Resistance Tester 8 is connected with the output of 10kv step-down transformer 5 by relay 7, shield hold connection transformer housing, hold ground connection; Controller 6 is connected with the control end of relay 7, Insulation Resistance Tester 8 signal end respectively, and controller 6 controls the keying of Insulation Resistance Tester 8 or relay 7 and receives the detection signal of Insulation Resistance Tester 8;
Electromagnetic lock 4 unit, comprise electromagnetic lock 4, electromagnetic lock 4 is with lock house, electromagnetic lock 4 is arranged on high voltage isolator 3, the mode that this high voltage isolator 3 adopts machinery to open and close, this high voltage isolator 3 comprises moving knife, stationary knife, knife rest, and moving knife and stationary knife are connected on knife rest respectively by insulation column, moving knife is connected with power transmission shaft, and this power transmission shaft is for controlling the closed of moving knife or opening; Power transmission shaft is provided with through hole or blind hole, during high voltage isolator 3 off-state, the through hole on power transmission shaft or blind hole relative; The collapsing length of the lock house of this electromagnetic lock 4 is 4-6cm;
Load 10 unit, comprises air switch 9 and load 10, and air switch 9 input is connected with the secondary side of 10kv step-down transformer 5, output is connected with load 10;
Control unit respectively with resistance detection unit and electromagnetic lock 4 unit, control unit judges whether the insulating resistance value that resistance detection unit detects reaches set point, controls the locking of electromagnetic lock 4 unit or unlocks the off-state of high voltage isolator 3.
Due to said system, electromagnetic lock 4 unit is controlled by MCU, resistance detection unit interoperation, transformer output is all carried out to the detection of insulation resistance at load 10 state and Light Condition, when the detected value of insulation resistance does not meet the regulation of setting extremely, the high voltage isolator 3 of transformer primary side is locked as the fail safe that off-state effectively ensures to be energized, during the transformer access electrical network 1 avoiding insulating properties not high, affect the fail safe of 10kv electrical network 1, native system is more applicable to the step-down transformer that 10kv is depressurized to 220v, the especially community step-down transformer of powering, due to the complex circuit of community electrical network 1, circuit in community easily causes short circuit, in this case, the necessity of carrying out Insulation monitoring before access electrical network 1 just highlights out, the normal use of equipment can be ensured, ensure the fail safe that 10kv step-down transformer 5 accesses.
specific embodiment 3:
The safety closing system of the safety closing device for 10kv step-down transformer according to embodiment 2, its control method:
Step 1: the high voltage isolator 3 and the circuit breaker 2 that detect the primary side of 10kv step-down transformer 5 are in off-state, and the air switch 9 detecting the secondary side of 10kv step-down transformer 5 disconnects;
High voltage isolator 3 is also locked as off-state by the action of step 2:MCU Controlling solenoid valve;
Step 3:MCU control relay 7 closes, and controls Insulation Resistance Tester 8 simultaneously and starts, detect the insulation resistance of 10kv step-down transformer 5 Light Condition; The insulation resistance numerical value that Insulation Resistance Tester 8 detects is sent to MCU and is shown by the display be connected with MCU;
Step 4: when the insulation resistance of 10kv step-down transformer 5 Light Condition is less than 900 megaohm, MCU sends alarm signal by coupled communicator; When the insulation resistance of 10kv step-down transformer 5 Light Condition is not less than 900 megaohm, MCU closed relay 7 and Insulation Resistance Tester 8, then carry out electric discharge 1-2s to the secondary side of 10kv step-down transformer 5;
Step 5: air switch 9, the MCU control relay 7 of the secondary side of closed 10kv step-down transformer 5 closes, and controls Insulation Resistance Tester 8 simultaneously and starts, and detects the insulation resistance of 10kv step-down transformer 5 load 10 state;
Step 6: when the insulation resistance of 10kv step-down transformer 5 load 10 state is less than 200 megaohm, MCU sends alarm signal by coupled communicator; When the insulation resistance of 10kv step-down transformer 5 load 10 state is not less than 200 megaohm, MCU closed relay 7 and Insulation Resistance Tester 8, then to the secondary side electric discharge 1-1.5s of 10kv step-down transformer 5;
Step 7: when the insulation resistance that Insulation Resistance Tester 8 detects 10kv step-down transformer 5 load 10 state is not less than 200 megaohms, the insulation resistance of Light Condition is not less than 900 megaohm, MCU Controlling solenoid valve unlocks high voltage isolator 3, can close;
Step 8: the isolating switch 3 disconnecting 10kv step-down transformer 5 secondary side, then closes high voltage isolator 3, the circuit breaker 2 of 10kv step-down transformer 5 primary side successively, then air switch 9 not load 10 electricity consumption of closed 10kv step-down transformer 5 secondary side.
Owing to have employed said method, measure 10kv transformer its insulation resistance when zero load and be greater than 900 megaohms, avoid the insulating properties of 10kv step-down transformer 5 itself inadequate, and endanger the fail safe of 10kv electrical network 1, after completing, detect 10kv transformer with load 10 when insulation resistance, the resistance of its insulation resistance is greater than 200 megaohms, the insulating properties on the cable of load 10 end can be ensured, the safe handling of raising equipment, in addition, this device can also be installed existing 10kv transformer, is conducive to the popularization of this device.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the safety closing device for 10kv step-down transformer, it is characterized in that, comprise relay, electromagnetic lock, Insulation Resistance Tester and controller, Insulation Resistance Tester comprise line end, hold, signal end and shielding end, the line end of Insulation Resistance Tester is connected with the output of 10kv step-down transformer by relay, shield hold connection transformer housing, hold ground connection; Controller controls the keying of Insulation Resistance Tester, relay or electromagnetically operated valve and receives the detection signal of Insulation Resistance Tester; On the switch that electromagnetic lock is arranged on 10kv step-down transformer primary side and for the off-state locking of this switch or unlock.
2. the safety closing device for 10kv step-down transformer according to claim 1, it is characterized in that, described switch is high voltage isolator, the mode that this high voltage isolator adopts machinery to open and close, this high voltage isolator comprises moving knife, stationary knife, knife rest, moving knife and stationary knife are connected on knife rest respectively by insulation column, and moving knife is connected with power transmission shaft, and this power transmission shaft is for controlling the closed of moving knife or opening.
3. the safety closing device for 10kv step-down transformer according to claim 2, it is characterized in that, described electromagnetic lock is fixed on knife rest, and the off-state of high voltage isolator is locked or unblock by locking power transmission shaft by this electromagnetic lock.
4. the safety closing device for 10kv step-down transformer according to claim 1, is characterized in that, described controller adopts 12v storage battery to power, and this storage battery is connected with civil power by transformer.
5. the safety closing device for 10kv step-down transformer according to claim 1, it is characterized in that, the output of described transformer is connected with air switch, and the output of air switch is connected with load.
6. the safety closing device for 10kv step-down transformer according to claim 1, is characterized in that, described 10kv step-down transformer is once connected to 10kv electrical network by high voltage isolator, circuit breaker, high voltage isolator.
7. the safety closing device for 10kv step-down transformer according to claim 1, it is characterized in that, described controller comprises MCU, display, keyboard and communicator; MCU is connected with display, keyboard and communicator respectively.
8. the safety closing device for 10kv step-down transformer according to any one of claim 1-7, is characterized in that, its safety closing system comprises:
Control unit, comprises MCU, display, keyboard and communicator; MCU is connected with display, keyboard and communicator respectively;
Electrical network unit, comprise 10kv electrical network, high voltage isolator, circuit breaker, 10kv step-down transformer, air switch, load, 10kv electrical network is connected with the primary side of circuit breaker with 10kv step-down transformer by high voltage isolator, and the secondary side of 10kv step-down transformer is connected with load by air switch;
Resistance detection unit, comprise relay, controller, Insulation Resistance Tester, Insulation Resistance Tester comprise line end, hold, signal end and shielding end, the line end of Insulation Resistance Tester is connected with the output of 10kv step-down transformer by relay, shield hold connection transformer housing, hold ground connection; Controller is connected with the control end of relay, Insulation Resistance Tester signal end respectively, and controller controls the keying of Insulation Resistance Tester or relay and receives the detection signal of Insulation Resistance Tester;
Electromagnetic lock unit, comprise electromagnetic lock, electromagnetic lock is with lock house, electromagnetic lock is arranged on high voltage isolator, the mode that this high voltage isolator adopts machinery to open and close, this high voltage isolator comprises moving knife, stationary knife, knife rest, and moving knife and stationary knife are connected on knife rest respectively by insulation column, moving knife is connected with power transmission shaft, and this power transmission shaft is for controlling the closed of moving knife or opening; Power transmission shaft is provided with through hole or blind hole, during high voltage isolator off-state, the through hole on power transmission shaft or blind hole relative; The collapsing length of the lock house of this electromagnetic lock is 4-6cm;
Load unit, comprises air switch and load, and air switch input is connected with the secondary side of 10kv step-down transformer, output is connected with load;
Control unit respectively with resistance detection unit and electromagnetic lock unit, control unit judges whether the insulating resistance value that resistance detection unit detects reaches set point, controls the locking of electromagnetic lock unit or unlocks the off-state of high voltage isolator.
9. the safety closing device for 10kv step-down transformer according to claim 8, is characterized in that, the control method of its safety closing system:
Step 1: the high voltage isolator and the circuit breaker that detect the primary side of 10kv step-down transformer are in off-state, the air switch detecting the secondary side of 10kv step-down transformer disconnects;
High voltage isolator is also locked as off-state by the action of step 2:MCU Controlling solenoid valve;
Step 3:MCU control relay closes, and controls Insulation Resistance Tester simultaneously and starts, detect the insulation resistance of 10kv step-down transformer Light Condition; The insulation resistance numerical value that Insulation Resistance Tester detects is sent to MCU and is shown by the display be connected with MCU;
Step 4: when the insulation resistance of 10kv step-down transformer Light Condition is less than 900 megaohm, MCU sends alarm signal by coupled communicator; When the insulation resistance of 10kv step-down transformer Light Condition is not less than 900 megaohm, MCU closed relay and Insulation Resistance Tester, then carry out electric discharge 1-2s to the secondary side of 10kv step-down transformer;
Step 5: the air switch of the secondary side of closed 10kv step-down transformer, MCU control relay closes, and controls Insulation Resistance Tester simultaneously and starts, detect the insulation resistance of 10kv step-down transformer load condition;
Step 6: when the insulation resistance of 10kv step-down transformer load condition is less than 200 megaohm, MCU sends alarm signal by coupled communicator; When the insulation resistance of 10kv step-down transformer load condition is not less than 200 megaohm, MCU closed relay and Insulation Resistance Tester, then to the secondary side electric discharge 1-1.5s of 10kv step-down transformer;
Step 7: when the insulation resistance of Insulation Resistance Tester detection 10kv step-down transformer load condition is not less than 200 megaohms, the insulation resistance of Light Condition is not less than 900 megaohm, MCU Controlling solenoid valve unlocks high voltage isolator, can close;
Step 8: the isolating switch disconnecting 10kv step-down transformer secondary side, then closes high voltage isolator, the circuit breaker of 10kv step-down transformer primary side successively, then the air switch not load electricity consumption of closed 10kv step-down transformer secondary side.
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| CN201510908220.9A CN105470941B (en) | 2015-12-10 | 2015-12-10 | A kind of safety closing device for 10kv step-down transformer |
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| CN201510908220.9A CN105470941B (en) | 2015-12-10 | 2015-12-10 | A kind of safety closing device for 10kv step-down transformer |
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| CN105470941B CN105470941B (en) | 2018-11-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470919A (en) * | 2015-12-10 | 2016-04-06 | 成都德善能科技有限公司 | Safety switch-on system for 10kV step-down transformer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2221325C2 (en) * | 2001-12-11 | 2004-01-10 | Закрытое акционерное общество "ЭЛЕКТРОН" | Induction motor control station |
| CN202772545U (en) * | 2012-08-05 | 2013-03-06 | 江苏省矿业工程集团有限公司 | Safe power supply device for isolation transformer |
| CN203204085U (en) * | 2013-02-27 | 2013-09-18 | 山东电力集团公司物资供应公司 | A comprehensive testing system used for casually inspecting the quality of a distribution transformer |
| CN105470919A (en) * | 2015-12-10 | 2016-04-06 | 成都德善能科技有限公司 | Safety switch-on system for 10kV step-down transformer |
| CN205195265U (en) * | 2015-12-10 | 2016-04-27 | 成都德善能科技有限公司 | A safe switching -on device for 10kV reducing transformer |
| CN205195244U (en) * | 2015-12-10 | 2016-04-27 | 成都德善能科技有限公司 | A safe combined floodgate system for 10kV reducing transformer |
-
2015
- 2015-12-10 CN CN201510908220.9A patent/CN105470941B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2221325C2 (en) * | 2001-12-11 | 2004-01-10 | Закрытое акционерное общество "ЭЛЕКТРОН" | Induction motor control station |
| CN202772545U (en) * | 2012-08-05 | 2013-03-06 | 江苏省矿业工程集团有限公司 | Safe power supply device for isolation transformer |
| CN203204085U (en) * | 2013-02-27 | 2013-09-18 | 山东电力集团公司物资供应公司 | A comprehensive testing system used for casually inspecting the quality of a distribution transformer |
| CN105470919A (en) * | 2015-12-10 | 2016-04-06 | 成都德善能科技有限公司 | Safety switch-on system for 10kV step-down transformer |
| CN205195265U (en) * | 2015-12-10 | 2016-04-27 | 成都德善能科技有限公司 | A safe switching -on device for 10kV reducing transformer |
| CN205195244U (en) * | 2015-12-10 | 2016-04-27 | 成都德善能科技有限公司 | A safe combined floodgate system for 10kV reducing transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470919A (en) * | 2015-12-10 | 2016-04-06 | 成都德善能科技有限公司 | Safety switch-on system for 10kV step-down transformer |
| CN105470919B (en) * | 2015-12-10 | 2018-11-27 | 浙江国正安全技术有限公司 | A kind of safety closing system for 10kV step-down transformer |
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| Publication number | Publication date |
|---|---|
| CN105470941B (en) | 2018-11-27 |
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