CN205301488U - Bimodulus fault indicator - Google Patents
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- CN205301488U CN205301488U CN201620007305.XU CN201620007305U CN205301488U CN 205301488 U CN205301488 U CN 205301488U CN 201620007305 U CN201620007305 U CN 201620007305U CN 205301488 U CN205301488 U CN 205301488U
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Abstract
The utility model discloses a bimodulus fault indicator, detect and carry out the control panel handled with the measuring of signal injection method and to the testing result including carrying out first half -wave simultaneously to the ground system that awaits measuring based on the ground system's that awaits measuring card line structure, and can based on the output device that reports an emergency and asks for help or increased vigilance of trouble information that the ground system that awaits measuring exists is instructed to the testing result of control panel, it is connected with the control panel to report an emergency and ask for help or increased vigilance output device. Bimodulus fault indicator can overcome that the rate of accuracy is low among the prior art, the function is few and reliability subalternation defect to realize that the rate of accuracy is high, the function is many and the high advantage of reliability.
Description
Technical field
This utility model relates to controller switching equipment technical field, in particular it relates to a kind of bimodulus fault detector.
Background technology
For different earthed systems, fault signature during its generation singlephase earth fault is also different, thus the selection method of any one single criterion is impossible to pervasive in the various situations of small current neutral grounding system.
But, in prior art, the accuracy rate of Earth Fault Detection is relatively low, the Comparison between detecting methods on market is single.
In realizing process of the present utility model, utility model people finds at least to exist in prior art that accuracy rate is low, function is few and the defect such as poor reliability.
Utility model content
The purpose of this utility model is in that, for the problems referred to above, it is proposed to a kind of bimodulus fault detector, with the advantage realizing accuracy rate height, function is many and reliability is high.
For achieving the above object, the technical solution adopted in the utility model is: a kind of bimodulus fault detector, including based on the card wire structure of earthed system to be measured earthed system to be measured can be carried out first half-wave detection and signal injection method detection the panel that testing result is processed simultaneously, and the alarm outut device of fault message that earthed system to be measured exists can be indicated based on the testing result of described panel; Described alarm outut device is connected with panel.
Further, this bimodulus fault detector, also include to utilize solar energy that described panel is carried out the solar photovoltaic cell panel of auxiliary power supply in sunlight conditions, described solar photovoltaic cell panel is connected with panel.
Further, described panel, including the first half-wave testing circuit that earthed system to be measured can be carried out first half-wave detection, earthed system to be measured can be carried out the signal injection method testing circuit of signal injection method detection, the single-chip microcomputer that processes can be carried out based on the testing result of described first half-wave testing circuit and signal injection method testing circuit, based on the alarm drive circuit controlling alarm outut device under the described single-chip microcomputer disposition to testing result, the control at single-chip microcomputer, and described single-chip microcomputer can be carried out the accumulator of reliable power supply; Described first half-wave testing circuit, signal injection method testing circuit, accumulator and alarm drive circuit, be connected with described single-chip microcomputer respectively.
Further, described panel, also include to carry out the wireless data transfer module of radio communication with described single-chip microcomputer;Described single-chip microcomputer is connected with wireless data transfer module.
Further, described panel, also include the solar recharging management circuit that can utilize solar energy that described accumulator carries out auxiliary charging, described solar recharging management circuit is connected with accumulator.
Further, described signal injection method testing circuit, including, the voltage up-down information of described card wire structure can be obtained and transmit the power taking step-up/step-down circuit to single-chip microcomputer, the electric field information of described card wire structure place electric field can be obtained and transmit the electric field sensing circuits to single-chip microcomputer, and the temperature of earthed system to be measured can be measured and measurement result injected the temperature measuring circuit of single-chip microcomputer;
Described electric field sensing circuits and power taking step-up/step-down circuit, be connected in parallel between described card wire structure and single-chip microcomputer; Described temperature measuring circuit is connected to single-chip microcomputer.
Further, described first half-wave testing circuit, including inductance L1, negative electrode is connected with the two ends of described inductance L1 respectively, and anode be connected the first Zener diode W1 and the second Zener diode W2, it is connected in parallel to the first one-level operational amplification circuit between negative electrode and the negative electrode of the second Zener diode W2 of described first Zener diode W1 and the second one-level operational amplification circuit, and it is connected to the outfan of described second one-level operational amplification circuit, structure is identical, and outfan is respectively as the one or two grade of operational amplification circuit of the output head anode of first half-wave testing circuit and the negative pole of output end of first half-wave testing circuit and the two or two grade of operational amplification circuit.
Further, between described first one-level operational amplification circuit and the second one-level operational amplification circuit, it is also associated with rc filter circuit.
Further, described alarm output circuit, including flashing light structure and/or LED flashing circuit and/or the phonic warning equipment of turning over.
The bimodulus fault detector of each embodiment of this utility model, owing to including based on the card wire structure of earthed system to be measured earthed system to be measured to be carried out first half-wave detection and signal injection method detection the panel that testing result is processed simultaneously, and the alarm outut device of fault message that earthed system to be measured exists can be indicated based on the testing result of panel; Alarm outut device is connected with panel; Such that it is able to overcome, accuracy rate in prior art is low, function is few and the defect of poor reliability, with the advantage realizing accuracy rate height, function is many and reliability is high.
Other features and advantages of the utility model will be set forth in the following description, and, partly become apparent from description, or understand by implementing this utility model.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used for providing being further appreciated by of the present utility model, and constitutes a part for description, is used for explaining this utility model, is not intended that restriction of the present utility model together with embodiment of the present utility model. In the accompanying drawings:
Fig. 1 is the operation principle schematic diagram of this utility model bimodulus fault detector;
Fig. 2 is the electronic schematic diagram of first half-wave testing circuit in this utility model;
Fig. 3 is the signal code pulse sequence signal actual waveform figure injected in this utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is illustrated, it will be appreciated that preferred embodiment described herein is merely to illustrate and explains this utility model, be not used to limit this utility model.
According to this utility model embodiment, as shown in Figure 1-Figure 3, it is provided that a kind of bimodulus fault detector. This bimodulus fault detector, based on injection method and first half-wave method dual grounds detection method, it is possible to be greatly enhanced the accuracy rate of Earth Fault Detection, make up the deficiency of single detection method on market.
Referring to Fig. 1, the technical solution of the utility model, adopts the core devices that the high-performance low-power-consumption single-chip microcomputer with ferrum electricity storage function of the up-to-date release of TI company processes as data, and adds record wave energy, circuit ruuning situation is recorded into single-chip microcomputer, carries out data operation by DMA transfer. Boosting electricity-fetching method, still can get the work of electrician's system when load current is minimum. Zigbee communication modes, improves the transmission speed of data, reduces power consumption.
In the technical solution of the utility model, so-called bimodulus is exactly have two kinds of earth-fault detecting methods simultaneously, and one is injection method, half-wave method headed by another kind. Injection method adopts current pulse sequence signal that singlephase earth fault is detected, current pulse sequence signal packet is containing n pulse train (n is natural number), the interval �� t=0.25*Mx second of adjacent pulse in pulse train, Mx=3,4,5 or 6 and combination thereof. First half-wave Cleaning Principle is the DC component that detection electric capacity punctures the transient current of moment, then the capacitance current of sampling ground connection moment compares with the voltage head half-wave of ground connection moment, when the capacitance current of ground connection moment suddenlys change and more than certain numerical value, and with the voltage head half-wave homophase of ground connection moment.
The technical solution of the utility model, has two kinds of ground detecting methods simultaneously, and has record wave energy, and adopt 2.4G communication speed, being in the industry cycle the first, first half-wave testing circuit is referring to Fig. 2, and the signal code pulse sequence signal actual waveform figure of injection is referring to Fig. 3.
In the technical solution of the utility model, two kinds of earthing detection patterns exist simultaneously, have and record wave energy in real time, solar energy power taking, circuit power taking, 2.4G communication modes, in the industry cycle add record wave energy first in indicator, adopt 2.4G communication speed first.
The technical solution of the utility model is bimodulus fault detector, is mounted on power circuit, for the intelligent apparatus of on-line checking and instruction short trouble and earth fault. The technical solution of the utility model is divided into short trouble detection and Earth Fault Detection two-in-one: wherein short-circuit detecting principle adopts self adaptation load current, and line current increases �� I, and after electric current increases the �� MS time, line current will be 0; Earth fault adopts signal injection method and first half-wave method double; two kind to see detection earth fault under mode of operation. It is the remote measurement of remote signalling and the load current being grounded fault that bimodulus fault detector can realize outside the mode of the flashing light that turns over of original fault detector that the remote signalling of short trouble information uploads and meet the remote measurement upload function two of electric current distant.
Below by specific example, the technical solution of the utility model is described in detail:
1. the operation principle of technical solutions of the utility model:
Bimodulus fault detector earthing detection criterion adopts two kinds of earthing detection patterns, when after circuit generation earth fault, as long as two kinds of detection patterns have one to be grounding to earth-fault signal, indicator can by Earth Fault Detection out, short-circuit detecting principle adopts self adaptation load current method, when short trouble can be detected by the circuit fault back pointer that is short-circuited, and line current and the fault message of collection are sent to data repeater station.
2. the detection mode of technical solutions of the utility model:
2.1 earthing detection modes:
The criterion of bimodulus fault detector detection earth fault has both of which respectively: (1) first half-wave method, (2) signal injection method (i.e. characteristic signal injection method).
2.2 short-circuit detecting modes: the criterion of bimodulus fault detector detection short trouble is: line current increases �� I, and line current will be 0 after electric current increases the �� MS time;
3.3 upload mode: bimodulus fault detector is outside the mode of the flashing light that turns over of original fault detector, it may be achieved the remote signalling of short trouble information is uploaded and met the remote measurement upload function two of electric current distant is the remote measurement of remote signalling and the load current being grounded fault.
3. major function and performance indications: realize first half-wave method or the signal injection method detection to earth fault; Realize the short circuit, the grounding function inspection that adaptively cope with; Realize the detection to line load electric current; Realize the record ripple that earth fault front 2 cycles and rear 8 cycles occur; Adopt 2.4G Bluetooth technology to realize and two distant DTU communications, realize real-time dual-way communication, communication speed when load current power taking reaches to meet bluetooth communication power 1.8Mbps; Realize turn over instruction and lamplight pointing after there is earth fault; The mode of operation of CPU and communication is determined, it is ensured that device is in minimum power consumption state by electric field detection and load current detection; It is grounded the detection of arcing fault as far as possible;
4. the feature of technical solutions of the utility model:
The technical solution of the utility model, adopts MSP430FR5847 single-chip microcomputer as core processor. Adopt MSP430FR5847 single-chip microcomputer: memory space increases by 4 times, for 32K; Ram space increases by 1 times, for 1K; A/D precision improves 2, is 12; Memory space dynamic distributes data space, it is simple to realize record wave energy; CPU can carry out A/D sampling in the dormant state, reduce further CPU power consumption, adds A/D sampling density and improves remote measurement precision.
Adopt communication module electric power management circuit, reduce battery loss during product inventory further; Adopt the brand-new MOS full-bridge control circuit that turns over to make to turn over more reliable, more energy efficient, and save 1 battery; Adopting 2.4G bluetooth communication module, communication speed is higher than 433 modules 150 times, makes transmitting-receiving unit data energy consumption be greatly lowered; Due to bluetooth communication, to transmit the time very short, adopts electrochemical capacitor energy storage, and during in order to reduce communication, the impact of big current versus cell, makes battery when later stage of life internal resistance increases, and system also can normal operation; Small current system adopts solar panel be powered, reduce the consumption to battery.
5. use demand of technical standard during technical solutions of the utility model
5.1 use environmental condition
Ambient temperature: bimodulus fault detector is suitable for workshop temperature-40��70 DEG C and the mean temperature that records in 24h less than+35 DEG C. Ambient humidity: bimodulus fault detector be suitable for workshop temperature-5��95% and in 24h relative humidity meansigma methods must not exceed 95%. Height above sea level: the height above sea level of fabricating yard is not to be exceeded 1000m;
5.3 communicating requirements: adopting 2.4G bluetooth communication module, communication speed is higher than 433 modules 150 times, makes transmitting-receiving unit data energy consumption be greatly lowered; Bimodulus fault detector can carry out coefficient by frock and adjust and parameter setting.
The functional requirement of 5.4 technical solutions of the utility model: possess short trouble discrimination function, possesses earth fault discrimination function, possesses short trouble upload function, possesses earth fault upload function, possesses A, B, C three-phase current detection function, possesses line current upload function, possesses the charged display function of circuit, possess the display that turns on the spot, LED display function, possess self adaptation load current function, possess the function preventing load current from changing, possess the function of automatic dodging inrush phenomenon, possess the function of charged handling, possess the function of automatic resetting.
The certainty of measurement of 5.5 technical solutions of the utility model
Room temperature current detecting: the current detection accuracy of fault detector is �� 3% in room temperature situation. High/low temperature current detection accuracy: high-low temperature chamber, to lower the temperature less than 1 DEG C/min rate of change, after being cooled to-40 DEG C and be stable or after being warming up to+70 DEG C of regulation and be stable, is incubated 2h, and current measurement precision should less than �� 3%.
The performance requirement of 5.6 technical solutions of the utility model:
5.6.1 electrical performance demands
A) short trouble is reported to the police and involution
1. under Normal Environmental Temperature, indicator is carried out short-circuit function test; indicator is accessed analog loopback; when the current value in loop exceedes setting fault current actuation of an alarm value and meets every other failure criterion condition; indicator should be able to send short trouble and reports to the police and reset in the stipulated time, should meet following regulation:
I is when distribution line is short-circuited fault, and the indicator in the correspondence phase line of fault wire section should detect short trouble, and sends short trouble warning instruction.
Ii is when after the singlephase earth fault that is short-circuited, indicator is except carrying out corresponding local warning instruction, at least possess function: export fault status information by switch contact, export fault data information by wireless telecommunications form, export fault data information by fiber optic communication form
Iii automatically resets: indicator should be able to time or circuit automatically reset after recovering normal power supply according to the rules, it is also possible to automatically select reset mode according to nature of trouble (instantaneity or permanent).
2. under Normal Environmental Temperature; indicator accessed in analog loopback and apply normal duty electric current; when the current value in loop varies more than the fault current actuation of an alarm value of setting; zero is dropped to again after the action delay more than regulation; after power failure 0.2s, reclosing success, when electric current returns to the load level before fault; indicator should correct operation, following regulation should be met:
The minimum recognition time 0.2s of i reclosing: fault detector should be able to identify that reclosing is spaced apart the transient fault of 0.2s correct operation; The fault detector installed on non-faulting branch line does not answer misoperation experiencing after standing the power failure of 0.2s reclosing interval after reclosing shoves.
B) earth fault is reported to the police and reset function test
Under Normal Environmental Temperature, indicator is carried out grounding function test; indicator is accessed in analog loopback; when the current value in loop exceedes setting fault current actuation of an alarm value and meets fault alarm eigenvalue requirements; indicator should be able to send earth fault and reports to the police and reset in the stipulated time, and experimental result should meet following regulation:
When distribution line generation singlephase earth fault, the indicator on fault wire section should detect earth fault, and sends earth fault warning instruction. When after the singlephase earth fault that is short-circuited, indicator is except carrying out corresponding local warning instruction, at least possess function: export fault status information by switch contact, export fault data information by wireless telecommunications form, export fault data information by fiber optic communication form. Automatically reset: indicator should be able to time or circuit automatically reset after recovering normal power supply according to the rules, it is also possible to automatically select reset mode according to nature of trouble (instantaneity or permanent). Automatically reset the time: regulation (2��48) h, it is recommended that value 2h, 4h, 8h, 16h, 24h, resetting time, allowable error was not more than �� 1%.
C) load fluctuation false alarm prevention: under Normal Environmental Temperature; indicator accessed in analog loopback and apply normal current; when the curent change in loop exceedes the fault current actuation of an alarm value of setting; and the load level before dropping to curent change again after the action delay more than regulation, indicator does not answer malfunction.
D) transformer no-load switchon surge false alarm prevention: under Normal Environmental Temperature; indicator is accessed in analog loopback; when the current value in loop suddenlys change from zero and exceedes the fault current actuation of an alarm value of setting; and when dropping to zero again after the action delay more than regulation, indicator does not answer malfunction.
E) the projecting load of circuit is shoved false alarm prevention: under Normal Environmental Temperature; indicator is accessed in analog loopback; when the current value in loop exceedes the fault current actuation of an alarm value of setting; and when dropping to again normal duty level after the action delay more than regulation, indicator does not answer malfunction.
F) the artificial big load false alarm prevention of switching: indicator accessed in analog loopback and apply normal duty electric current, when the current value in loop varies more than the fault current actuation of an alarm value of setting, and when dropping to zero again after the longest action delay more than regulation, indicator should not malfunction.
G) healthy phases reclosing shoves false alarm prevention: under Normal Environmental Temperature; indicator accessed in analog loopback and apply normal duty electric current; after power failure 0.2s; current value in loop suddenlys change from zero again and exceedes the fault current actuation of an alarm value of setting; and when dropping to zero again after the action delay more than regulation, indicator does not answer misoperation.
H) the minimum recognition time 0.2s of reclosing: 1. fault detector should be able to identify that reclosing is spaced apart the transient fault of 0.2s correct operation. 2. the fault detector installed on non-faulting branch line does not answer misoperation experiencing after standing the power failure of 0.2s reclosing interval after reclosing shoves.
I) static power consumption: to indicator battery, its power supply capacity theory stand-by time should be greater than 10 years warning instruction time more than 2000h.
J) closing on interference immunity to interference: when the circuit of adjacent 300mm occurs more than short trouble alarm current, should there is not false alarm in the technical solution of the utility model.
K) service life: be resistant to 2000 electrical endurance tests or be not less than 8 years service life.
L) tolerance short-circuit current rush test: indicator is accessed in test loop, pass to the instantaneous short-circuit dash current of short-circuit test current parameters, indicator outward appearance should without damaged, securing member non-loosening phenomenon, and test back pointer function should meet electrical performance demands.
Short-circuit test current parameters (recommendation) is as follows: short-circuit current (virtual value) 16kA, 20kA, 25kA, 31.5kA; The short-circuit current persistent period: 2s, 3s, 4s; Short trouble peak point current and persistent period: 2.5 times of short-circuit currents; Time 0.3s.
6.6.2 classical insulation
A) short trouble is reported to the police: 1. indicator should be able to automatically determine fault current actuation of an alarm value according to line load change; 2. discernible short trouble alarm current minimum length in time should between 20ms��40ms.
B) earth fault is reported to the police: have the eigenvalue of quantitative setting.
C) room temperature action error require: indicator should be able to according to line load change automatically determine fault current actuation of an alarm value, room temperature run its action error should�ܡ� 20%;
D) high/low temperature action error requires: by GB/T2423.2 requirement, is placed in high-temperature test chamber by indicator and is in normal operating conditions, is incubated 2h at 70 DEG C of temperature of high temperature, the internal each element of device to be instructed reach thermally-stabilised after, test its electric property. Result of the test should meet the performance requirement of regulation. Indicator should be able to according to line load change automatically determine fault current actuation of an alarm value, under-40 DEG C of running environment of low temperature action error should�ܡ� 25%.
By GB/T2423.1 requirement, indicator be placed in low-temperature test chamber and be in normal operating conditions, being incubated 2h at temperature, the internal each element of device to be instructed reach thermally-stabilised after, test its electric property. Result of the test should meet 5.6 rules and regulations provisioning requests. Indicator should be able to according to line load change automatically determine fault current actuation of an alarm value, under-40 DEG C of running environment of low temperature action error should�ܡ� 25%.
E) Alternate hot and humid: by GB/T2423.4 2008 requirement, the indicator that will not turn on is placed in low-temperature test chamber, run under the parameter requests such as the temperature humidity according to table 1, device to be instructed recovers to room temperature state, carry out outward appearance insulation and functional test, indicator should meet claimed below: the insulation resistance of shell is not less than 5M �� by contact, and indicator feature should meet the performance requirement of technical solutions of the utility model.
Table 1: cyclic damp heat test
F) electrical endurance: indicator is accessed in analog loopback, when break down in loop electric current time, indicator should be able to send fault alarm information and reset (resetting time should be adjusted to the shortest) in the stipulated time, terminate as once from fault-alarming state to alarm condition, test is no less than 2000 times, and in process of the test, indicator should be working properly.
5.6.3 electromagnetic compatibility
A) esd immunity: by GB/T17626 2006 the 5th article the 8th article, indicator carrying out the esd immunity test of class 4 level (see table 2), parameter and requirement are as follows:
1. when indicator housing conductive and undeclared paint film are insulating barrier: the shell released to release electric discharge 8kV (nominal value) that operator are generally likely to carries out with operation point and housing trip bolt: 10 times/pole of positive-negative polarity electric discharge; Impulse discharge should be greater than 1s interval time.
2. when indicator housing is insulant: with atmospherical discharges 15kV (nominal value), the shell of indicator is carried out: 10 times/pole of positive-negative polarity electric discharge; Impulse discharge should be greater than 1s interval time.
The indicator being under fault-free alarm condition applies static discharge interference, and in interference applying process, indicator should be able to keep fault-free alarm condition. The indicator being under fault-alarming state applies static discharge interference, and in interference applying process, indicator should be able to keep fault-alarming state.
Table 2: ESD test major parameter
B) radio frequency electromagnetic field radiation immunity: by the 5th article, the 8th article requirement of GB/T17626.3 2006, test class 3 grades (see table 3), apply parameter as follows: test field intensity 10V/m; It is scanned measuring in 80MHz��1000MHz frequency range; Carry out determining frequency measurement in 80MHz��1000MHz frequency range; It is a frequency measurement point every 5MHz, is 30s at every and stops transmitting.
The indicator being under fault-free alarm condition applies interference, and in interference applying process, indicator should be able to keep fault-free alarm condition and reset normal. The indicator being under fault-alarming state applies interference, and in interference applying process, indicator should be able to keep fault-free alarm condition and reset normal. Applying to disturb and indicator applies simulation short circuit (ground connection) fault current simultaneously, now indicator should be able to detect existence the energy correct operation of fault current.
Table 3: radio frequency electromagnetic field radiation test major parameter
C) surge impact immunity to interference
By the pertinent regulations of GB/T17626.5 2008, test class 4 grades (see table 4), apply parameter as follows:
Voltage waveform: 1.2/50 �� s;Open-circuit test voltage peak: 4kV; Polarity: positive/negative, each 5 times; Repetitive rate: per minute at least one times. Test method by GB/T17626.5 2008 the 5th article, the 8th article carry out.
The indicator being under fault-free alarm condition applies interference, and in interference applying process, indicator should be able to keep fault-free alarm condition and reset normal. The indicator being under fault-alarming state applies interference, and in interference applying process, indicator should be able to keep fault-free alarm condition and reset normal. Applying is disturbed and indicator is applied simulation short circuit (ground connection) fault current simultaneously, and now indicator should be able to detect the existence also energy correct operation of fault current and reset normal.
Table 4: surge impact immunity to interference
D) power frequency magnetic field noise immunity: by the pertinent regulations of GB/T17626.8 2008, test class 5 grades (see table 5), apply parameter as follows: the 1. current waveform of power frequency magnetic field: continue sinusoidal wave form; Magnetic field parameter: 100A/m. 2. the current waveform in damped oscillation magnetic field: continue sinusoidal wave form; Magnetic field parameter: 100A/m.
The indicator being under fault-free alarm condition applies interference, and in interference applying process, indicator should be able to keep fault-free alarm condition and reset normal. The indicator being under fault-alarming state applies interference, and in interference applying process, indicator should be able to keep fault-free alarm condition and reset normal. Applying is disturbed and indicator is applied simulation short circuit (ground connection) fault current simultaneously, and now indicator should be able to detect the existence also energy correct operation of fault current and reset normal.
Table 5: test class
5.6.4 mechanical property requirements
A) grip of card wire structure requires: 1. fixed by line ball spring, pulls down being perpendicular to the in-plane that line ball spring constitutes with strain gauge (such as spring scale), and when 8 times that pulling force is indicator deadweight, spring should remain stationary as. 2. being installed on 300m steel-cored aluminium strand by overhead type indicator, indicator stretched along aluminum stranded conductor direction with strain gauge (such as spring scale), when pulling force is 50N, indicator should not move.
B) vibration durability requires: carry out vibration long duration test by GB/T11287 2000, indicator should carry out vibration long duration test according to test class I grade (see table 6), and off-test back pointer should meet claimed below: indicator feature should meet the requirement of 5.6.1.
Table 6: vibration durability test major parameter
C) fall-down test is tilted: falling height: 1m; Drop number: 1 time.
D) degree of protection: by GB4208 2008 standard-required, indicator degree of protection requires as follows: cable-type and overhead line type indicator degree of protection are not less than IP67. The overhead line type and the outdoor cable type indicator that have resistance to immersion ability are not less than IP68.
Fire hazard is tested: the installation environment according to indicator, it is recommended that test harsh class 5 level (see table 7), minimum must not lower than 2 grades. Test position: the insulation crust of casement indicator. Test method is undertaken by GB/T5169.11 2006 the 10th rules and regulations provisioning request. After off-test, indicator, without burning or scorching hot, or all meets following situation, then it is assumed that pass the test: if the flame of test specimen or scorching hot extinguish removing in the 30s after glowing filament. When using the shop fixtures layer of packaging silk paper of regulation, ignition do not answered by silk paper.
Table 7: harsh grade
Last it is noted that the foregoing is only preferred embodiment of the present utility model, it is not limited to this utility model, although this utility model being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature carries out equivalent replacement.All within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (9)
1. a bimodulus fault detector, it is characterized in that, including based on the card wire structure of earthed system to be measured earthed system to be measured can be carried out first half-wave detection and signal injection method detection the panel that testing result is processed simultaneously, and the alarm outut device of fault message that earthed system to be measured exists can be indicated based on the testing result of described panel; Described alarm outut device is connected with panel.
2. bimodulus fault detector according to claim 1, it is characterized in that, this bimodulus fault detector, also includes to utilize solar energy that described panel is carried out the solar photovoltaic cell panel of auxiliary power supply in sunlight conditions, and described solar photovoltaic cell panel is connected with panel.
3. bimodulus fault detector according to claim 1 and 2, it is characterized in that, described panel, including the first half-wave testing circuit that earthed system to be measured can be carried out first half-wave detection, earthed system to be measured can be carried out the signal injection method testing circuit of signal injection method detection, the single-chip microcomputer that processes can be carried out based on the testing result of described first half-wave testing circuit and signal injection method testing circuit, can based on the described single-chip microcomputer disposition to testing result, the alarm drive circuit of alarm outut device is controlled under the control of single-chip microcomputer, and described single-chip microcomputer can be carried out the accumulator of reliable power supply, described first half-wave testing circuit, signal injection method testing circuit, accumulator and alarm drive circuit, be connected with described single-chip microcomputer respectively.
4. bimodulus fault detector according to claim 3, it is characterised in that described panel, also includes to carry out the wireless data transfer module of radio communication with described single-chip microcomputer; Described single-chip microcomputer is connected with wireless data transfer module.
5. bimodulus fault detector according to claim 3, it is characterised in that described panel, also includes the solar recharging management circuit that can utilize solar energy that described accumulator carries out auxiliary charging, and described solar recharging management circuit is connected with accumulator.
6. bimodulus fault detector according to claim 3, it is characterized in that, described signal injection method testing circuit, including, the voltage up-down information of described card wire structure can be obtained and transmit the power taking step-up/step-down circuit to single-chip microcomputer, the electric field information of described card wire structure place electric field can be obtained and transmit the electric field sensing circuits to single-chip microcomputer, and the temperature of earthed system to be measured can be measured and measurement result injected the temperature measuring circuit of single-chip microcomputer;
Described electric field sensing circuits and power taking step-up/step-down circuit, be connected in parallel between described card wire structure and single-chip microcomputer; Described temperature measuring circuit is connected to single-chip microcomputer.
7. bimodulus fault detector according to claim 3, it is characterized in that, described first half-wave testing circuit, including inductance L1, negative electrode is connected with the two ends of described inductance L1 respectively, and anode be connected the first Zener diode W1 and the second Zener diode W2, it is connected in parallel to the first one-level operational amplification circuit between negative electrode and the negative electrode of the second Zener diode W2 of described first Zener diode W1 and the second one-level operational amplification circuit, and it is connected to the outfan of described second one-level operational amplification circuit, structure is identical, and outfan is respectively as the one or two grade of operational amplification circuit of the output head anode of first half-wave testing circuit and the negative pole of output end of first half-wave testing circuit and the two or two grade of operational amplification circuit.
8. bimodulus fault detector according to claim 7, it is characterised in that between described first one-level operational amplification circuit and the second one-level operational amplification circuit, be also associated with rc filter circuit.
9. bimodulus fault detector according to claim 1 and 2, it is characterised in that described alarm output circuit, including flashing light structure and/or the LED flashing circuit of turning over.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620007305.XU CN205301488U (en) | 2016-01-06 | 2016-01-06 | Bimodulus fault indicator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703402A (en) * | 2017-09-13 | 2018-02-16 | 河南省三禾电气有限公司 | Fault detector |
| CN109634181A (en) * | 2018-12-21 | 2019-04-16 | 天津浩源慧能科技有限公司 | Fault detector full-bridge turns over circuit |
| CN114034956A (en) * | 2021-11-10 | 2022-02-11 | 国网甘肃省电力公司陇南供电公司 | Fault monitoring and early warning method for dry-type air-core reactor |
-
2016
- 2016-01-06 CN CN201620007305.XU patent/CN205301488U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703402A (en) * | 2017-09-13 | 2018-02-16 | 河南省三禾电气有限公司 | Fault detector |
| CN109634181A (en) * | 2018-12-21 | 2019-04-16 | 天津浩源慧能科技有限公司 | Fault detector full-bridge turns over circuit |
| CN109634181B (en) * | 2018-12-21 | 2023-10-24 | 天津浩源汇能股份有限公司 | Full-bridge turn-over disc circuit of fault indicator |
| CN114034956A (en) * | 2021-11-10 | 2022-02-11 | 国网甘肃省电力公司陇南供电公司 | Fault monitoring and early warning method for dry-type air-core reactor |
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