CN104678247A - Device for measuring electric leakage of 28V power supply - Google Patents

Device for measuring electric leakage of 28V power supply Download PDF

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CN104678247A
CN104678247A CN 201510082858 CN201510082858A CN104678247A CN 104678247 A CN104678247 A CN 104678247A CN 201510082858 CN201510082858 CN 201510082858 CN 201510082858 A CN201510082858 A CN 201510082858A CN 104678247 A CN104678247 A CN 104678247A
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circuit
isolation
voltage
connected
28v
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CN 201510082858
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Chinese (zh)
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姜祝
武东健
徐超
吴永红
赵一阳
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北京航天计量测试技术研究所
中国运载火箭技术研究院
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Abstract

The invention belongs to the technical field of electrical measurement and particularly relates to a device for measuring electric leakage of a 28V power supply. The device aims at doing the problems of failure in real-time monitoring of the electric leakage of the 28V power supply and low efficiency. The device is characterized by comprising an isolating resistor, a sampling resistor, a voltage converting circuit, an equipotential circuit, an optocoupler isolating device and a proportional control circuit, wherein the isolating resistor is connected with a power supply and an enclosure respectively; the other end of the sampling resistor is connected with the enclosure; an output end of the voltage converting circuit is connected with an input end of the optocoupler isolating device; an output end of the optocoupler isolating device is connected with an input end of the proportional control circuit; an input end of the equipotential circuit is connected with the enclosure and a reversal input end of the voltage converting circuit; and an output end of the equipotential circuit is grounded. The device measures whether voltage of positive and negative buses of the 28V power supply and voltage of the enclosure are balanced and whether the electric leakage exists to achieve electric leakage inspection of the positive and negative buses to the enclosure by carrying out sampling, isolating and signal conditioning on a leakage current value of a measured object.

Description

一种测量28V电源漏电的装置 An apparatus for measuring a leakage power 28V

技术领域 FIELD

[0001] 本发明属于漏电测量技术领域,具体涉及一种测量28V电源漏电的装置。 [0001] The present invention belongs to the technical field leakage measurement, particularly to an apparatus for measuring the leakage of 28V supply.

背景技术 Background technique

[0002] 在航空航天领域,28V直流电源一致以来是被广泛使用的电源类型。 [0002] In the aerospace field, 28V DC power supply is consistent with the type of power since been widely used. 其用电安全设计也受到了越来越多的关注,所以其工作电压对电器系统与设备壳体之间的漏电指标也提出了更高的要求。 Its electrical safety design has also been more and more attention, so that the operating voltage of the electrical leakage between the index system and the device housing also put forward higher requirements. 尤其是在航空航天领域内,环境条件十分恶劣严酷,高低温交替变换,湿度变化较大等都是不可避免的,从而导致了电缆线的绝缘介质的老化以及绝缘程度的降低,因此导致了28V正负母线与壳体之间产生了一定的泄漏。 Particularly in the aerospace field, harsh environmental conditions are very bad, alternating high and low temperature, humidity and the like are inevitably large, resulting in a reduced degree of aging, and the insulating dielectric cables, thus resulting in a 28V DC bus between the housing and have a certain leakage. 此时,电源正负极引线将通过绝缘层和壳体构成泄露电流回路,使壳体电位上升,从而会影响电气系统的正常工作,严重情况下还会造成电气火灾。 At this time, the positive power constituting the negative electrode lead circuit leakage current through the insulating layer and the housing, so that the potential rise in the housing, which will affect the normal operation of the electrical system, will result in an electrical fire in severe cases.

[0003] 电源漏电问题尤其是对于火箭系统而言更是不可忽视。 [0003] more power leakage problems can not be ignored, especially for rocket systems. 因为火箭系统属于浮地系统,要求箭上供电系统的电源正负端和弹壳绝缘,所以一定要测量供电系统的电源正负端和壳体的绝缘程度。 Because the rocket system is ungrounded system that requires the power supply system arrow positive and negative side and the insulating shell, it must be measured positive and negative terminals of the power supply system and the degree of insulation of the housing. 如果出现电阻减小或者导通现象,则需要尽快发现并进行处理。 If the phenomenon of resistance is reduced or turned on, and the need to process quickly found. 但是目前在该领域的检测漏电的方法均需采用离线的方式,通过用绝缘阻值测试仪等方式断开电缆做离线测试。 However, the current method of detecting leakage in the field required off-line way to do offline testing by disconnecting the cable insulation resistance tester or the like. 但是由于现有的检测漏电方式无法实现实时监测,并且需要断开电缆和专门的仪器测试检测周期长,效率低。 However, due to current leakage detection method can not achieve real-time monitoring, and the need to disconnect the cables and specialized test equipment to detect long cycle and low efficiency.

发明内容 SUMMARY

[0004] 本发明的目的在于解决28V电源漏电技术无法实现实时监测、监测周期长、效率低的问题,提供一种测量28V电源漏电的装置。 [0004] The object of the present invention is to solve the problem 28V power drain art can not realize real-time monitoring, monitoring of long cycle, low efficiency, there is provided apparatus for measuring the leakage of 28V supply.

[0005] 本发明是这样实现的: [0005] The present invention is implemented as follows:

[0006] 一种测量28V电源漏电的装置,包括隔离电阻、采样电阻、电压变换电路、等电势电路、光耦隔离器件和比例调节电路;隔离电阻分别与电源和机壳连接,起到连接和隔离作用,采样电阻的另一端与机壳连接,采样电阻将被测的泄漏电流转换为电压;电压变换电路的输出端与光耦隔离器件的输入端连接,光耦隔离器件的输出端与比例调节电路的输入端连接,电压变换电路与光耦隔离器件构成电流反馈电路,利用光耦特性完成电压精确转换和隔离;等电势电路的输入端分别与机壳和电压变换电路的反向输入端连接,等电势电路的输出端接地,等电势电路用于实现机壳与测量地的隔离;比例调节电路用于实现输出电压的调节。 [0006] An apparatus for measuring the leakage 28V supply, including isolation resistance, sampling resistor, the voltage conversion circuit, and other circuit potential, proportional control device and the opto-isolated circuits; isolation resistance and the power supply are connected to the housing, and play connection isolation, and the other end is connected to the housing sampling resistor, the measured sample resistor leakage current into a voltage; input the output of the voltage conversion circuit is connected to the opto-isolated devices, the ratio of the output terminal of the opto-isolation device regulating circuit connected to the input terminal, the voltage conversion circuit and optocoupler isolation devices constitute a current feedback circuit is completed using accurate voltage conversion characteristic of the optocoupler and isolation; equipotential circuit and the input terminals of the voltage conversion circuit housing inverting input terminal connection, equipotential output of the circuit is grounded, and other potential isolation circuit for realizing the measurement chassis ground; ratio adjusting circuit for adjusting the output voltage to achieve.

[0007] 如上所述的隔离电阻共2个,两个隔离电阻的一端分别与待测28V电源的正负端连接,两个隔离电阻的另一端连接在一起,并分别与采样电阻的一端和电压变换电路的同向输入端连接。 [0007] The isolation resistance of 2 as described above, one of the two isolation resistors are connected to the negative terminal of the test power supply 28V, and the other ends of the two isolation resistors connected together at one end and with the sampling resistor, respectively, and voltage conversion circuit connected to the same input terminal.

[0008] 如上所述的隔离电阻在M Ω级。 In stage M Ω isolation resistance [0008] as described above.

[0009] 如上所述的两个隔离电阻的阻值均为IMΩ。 [0009] As described above the resistance of the two resistors are isolated IMΩ.

[0010] 如上所述的采样电阻选用1kD的0.1%的精密电阻。 [0010] As described above sampling resistor selection 1kD 0.1% precision resistor.

[0011] 如上所述的电压变换电路采用集成运放OP1177及外围限流电阻实现,外围限流电阻的阻值小于IKΩ。 [0011] The voltage conversion circuit as described above using an integrated operational amplifier OP1177 limiting resistor and a peripheral implemented, the peripheral resistance is less than the current limiting resistor IKΩ.

[0012] 如上所述的光耦隔离器件光耦隔离器件采用IL300-F-X009实现,采用集成运放OPl 177和IL300-F-X009实现了电压隔离变换,电压通过IL300-F-X009的管脚5进行输出。 [0012] As described above the isolation device optocoupler optocoupler isolation device using IL300-F-X009 implemented using integrated operational amplifier OPl 177 and IL300-F-X009 achieve voltage isolation transformation, tube voltage by the IL300-F-X009 5 feet output.

[0013] 如上所述的光耦隔离器件隔离的电压在KV以上。 [0013] As described above the device isolation opto-isolated voltage in KV or more.

[0014] 如上所述的电压比例调节电路采用0P1177、调节电位器RPl配合外围电路实现, Voltage proportional to [0014] of the regulating circuit described above uses 0P1177, adjustment potentiometer RPl implemented with external circuit,

电压输出Vtjut范围为O〜4.8V。 Vtjut voltage output range O~4.8V.

[0015] 如上所述的等电势电路采用集成运放OP1177实现,用于进行机壳与测量地的隔离。 [0015] and the like as described above, the potential of an integrated circuit operational amplifier OP1177 implemented, for isolating the measurement chassis ground.

[0016] 本发明的有益效果在于: [0016] Advantageous effects of the present invention:

[0017] 本装置采用隔离电阻、采样电阻、电压变换电路、等电势电路、光耦隔离器件和比例调节电路,通过将被测对象的漏流值经过采样、隔离和信号调理等处理,测量了28V电源正负母线与相应的设备机壳电压是否平衡,是否有漏电,实现了正负母线对机壳的漏电检查,从而可以判断由该电源供电的整个系统是否存在漏电现象,并可根据具体的测量值来判断问题是否严重,是否需要解决。 [0017] The device uses isolation resistance, sampling resistor, the voltage conversion circuit, and other circuit potential, and the device isolation optocoupler ratio adjusting circuit, the leakage current value measured by the object sampled, isolation and signal conditioning process, measuring the 28V supply bus bar and the positive and negative voltage corresponding to the equipment housing is balanced, if there is leakage, to achieve a positive and negative busbars on the chassis of the leakage test, the entire system can be determined by the presence or absence of the supply of leakage, and according to the specific measurements to determine whether the problem is serious, need to be resolved. 给操作人员提供了依据。 To the operator provides the basis. 该装置电路结构简单,操作方便,可以实现在线检测,实时监控,使检测效率大大提高。 Circuit configuration which is simple, easy to operate, the detection can be achieved online, real-time monitoring, the detection efficiency is greatly improved.

附图说明 BRIEF DESCRIPTION

[0018] 图1是本发明的一种测量28V电源漏电的装置的结构示意图。 [0018] FIG. 1 is a schematic structural diagram of the present invention apparatus 28V supply leakage measurements.

具体实施方式 detailed description

[0019] 下面结合附图和具体实施例对本发明的一种测量28V电源漏电的装置进行描述: The drawings and described specific embodiments of the present invention, an apparatus for measuring a leakage power 28V [0019] conjunction with the following:

[0020] 一种测量28V电源漏电的装置,包括隔离电阻、采样电阻、电压变换电路、等电势电路、光耦隔离器件和比例调节电路。 [0020] An apparatus for measuring the leakage 28V supply, including isolation resistance, sampling resistor, the voltage conversion circuit, and other circuit potential, proportional control device and the opto-isolated circuitry. 其中,隔离电阻共2个,两个隔离电阻的一端分别与待测28V电源的正负端连接,两个隔离电阻的另一端连接在一起,并分别与采样电阻的一端和电压变换电路的同向输入端连接。 Wherein the isolation resistance of 2, one of the two isolation resistors are connected to the negative terminal of the test power supply 28V, and the other ends of the two isolation resistors are connected together and to one end respectively with the voltage conversion circuit and a sampling resistor It is connected to the input terminal. 隔离电阻分别与电源和机壳连接,既起到连接作用又使电源的正负端与机壳的电器连接性较差,隔离电阻一般在ΜΩ级。 Isolation resistors are connected to the chassis and the power source, and both play a role in connecting the power source with positive and negative terminals of the electrical connector housing is poor, generally in the isolation resistance ΜΩ level. 采样电阻的另一端与机壳连接,采样电阻将被测的泄漏电流转换为电压,以便后续电路的处理。 Sampling resistor connected to the other end of the housing, the sampling resistor measured leakage current into a voltage, so that the subsequent processing circuit. 电压变换电路的输出端与光耦隔离器件的输入端,光耦隔离器件的输出端与比例调节电路的输入端连接,电压变换电路与光耦隔离器件构成电流反馈电路,利用光耦的特性完成了电压的精确转换和隔离,具体的隔离电压随不同的光耦隔离器件而改变,一般都在KV以上。 Output of the voltage converting circuit and the opto-isolated input device, an output of the opto-isolation devices ratio adjustment circuit is connected to the input terminal, the opto-isolated voltage converting circuit means constitute a current feedback circuit is completed using the characteristics of optocoupler accurate voltage conversion and isolation, specific isolation voltage isolation devices with different optocoupler is changed, or more generally in KV. 等电势电路的输入端分别与机壳和电压变换电路的反向输入端连接,等电势电路的输出端接地。 Inverting input of the equal potential input terminals of the circuit housing and connected to the voltage conversion circuit, an output circuit equipotential grounded. 等电势电路用于实现机壳与测量地的隔离。 Other potential isolation circuit for realizing the measurement chassis ground. 比例调节电路用于实现输出电压的调节。 Ratio adjusting circuit for adjusting the output voltage to achieve. 由于光耦隔离器件的输入输出传输比例通常是在一个范围之内,而不是一个固定值;另外由于最后的输出电压Vrat通常在不同的应用场合有不同的输出电压范围要求。 Since the transmission ratio of the input and output of the opto-isolation device usually within a range, rather than a fixed value; In addition, as the final output voltage Vrat usually have different output voltage range required in different applications. 本发明采用了此电压比例调节电路,通过调节电位器RPl来得到所需要的输出。 The present invention utilizes this proportional voltage regulating circuit to obtain a desired output by adjusting the potentiometer RPl.

[0021] 下面结合一具体实施例对本发明的测量28V电源漏电的装置进行更进一步的描述: [0021] below with reference to a particular embodiment of the measuring apparatus of the present invention 28V supply will be further described in the drain:

[0022] 如图1所示,一种测量28V电源漏电的装置,隔离电阻选用两个1ΜΩ的电阻,采样电阻选用lOkD的0.1%的精密电阻,当浮地的28V正、负母线对地有泄漏时,在1kD电阻上有电压产生,通过测量1kQ电阻上的电压,可判断是否有泄漏,也能够算出具体的漏流值。 [0022] As shown in FIG 1, an apparatus for measuring the leakage 28V supply, the choice of isolation resistance of resistances of the two 1ΜΩ, 0.1% precision resistor lOkD sampling resistor selection when 28V positive and negative bus to ground with a floating when the leak voltage generated in the resistor 1kD, the voltage across the 1kQ resistance measurement, it can be determined whether there is leakage, the leakage can be calculated from the specific current value. 采样电阻变化后的电压送到了电压变换电路的运放的正端。 Sampling the voltage variable resistance to the positive terminal of op amp voltage conversion circuit. 电压变换电路采用集成运放0P1177及外围限流电阻实现,一般外围限流电阻的阻值小于1ΚΩ。 Voltage converting circuit using an integrated operational amplifier and the external current limiting resistor 0P1177 implemented, the current limiting resistor values ​​are generally less than the peripheral 1ΚΩ. 光耦隔离器件采用IL300-F-X009实现。 Opto isolation device is realized IL300-F-X009. 采用集成运放0P1177和IL300-F-X009实现了电压隔离变换,最后的电压通过IL300-F-X009的管脚5进行输出。 And using an integrated operational amplifier 0P1177 IL300-F-X009 insulating converter voltage to achieve a final voltage output through pin 5 IL300-F-X009 in. 图1中隔离电路中I3D1B成了负反馈,当采样电压Vin输入时,运放OPl 177的输出是LED上有电流流过,且输入电压的变化体现在该电流上,并驱动LED发光把电信号转变为光信号。 An isolation circuit in FIG I3D1B became negative feedback, when the input voltage Vin is sampled, the output of the operational amplifier OPl 177 that a current flows through the LED, and the input voltage changes in the reflected current, and drives the power LED light signal into an optical signal. LED发出的光被TO1探测到并产生电流Ip p根据运放的特性,输入电压也会产生电流流过札。 Light emitted by the LED is detected and generating a current to TO1 Ip p according to the characteristics of the op amp, the input voltage will produce a current flow through the sheaf. Ip1取决于输入电压和R1的值。 Ip1 depends on the input voltage and the value of R1. 同样LED发出的光同时照射在两个光敏二极管上1^和H) 2,由于Ip2 = K 3X Ip2,1(3的范围在0.945〜1.061倍之间。从而在&的上方产生了一个电压Vtjutl。通过换算^咖/^=!^※!^/!^。由此可知,Vtjutl其增益可通过调整R ^R1的值来实现。Vtjutl被送到了比例调节电路进行最后输出电压的调节。由于光耦隔离器件的输入输出传输比K3是在一个范围之内,而不是一个固定值;另外由于最后的输出电压Vwt通常在不同的应用场合有不同的输出电压范围要求。电压比例调节电路采用0P1177、调节电位器RPl配合基于现有技术实现的外围电路实现,最后可以通过调节电位器RPl控制了最后的电压输出Vtjut范围为O〜4.8V。最后的等电势电路采用集成运放0P1177实现,用于进行机壳与测量地的隔离。 Also light emitted by the LED is irradiated simultaneously on two photodiodes 1 and ^ H) 2, due to the Ip2 = K 3X Ip2,1 (0.945~1.061 range between 3 times resulting in a voltage at the top of & Vtjutl by scaling coffee ^ / ^ =! ^ ※! ^ /! ^. it can be seen, Vtjutl .Vtjutl gain may be achieved by adjusting the value of R ^ R1 is supplied to a proportional regulating circuit regulating the final output voltage. Since input-output ratio of the transmission opto-isolation device K3 is within a range, rather than a fixed value; in addition, as the final output voltage Vwt often have different requirements in different output voltage range of the ratio of the voltage regulating circuit applications using 0P1177. adjusting potentiometers RPl mating peripheral circuit based on the conventional technology to achieve, and finally can be controlled by adjusting potentiometer RPl final output voltage range Vtjut O~4.8V. Finally equipotential circuit implemented using an integrated operational amplifier 0P1177, with to isolate the measurement chassis ground.

[0023] 本装置采用隔离电阻、采样电阻、电压变换电路、等电势电路、光耦隔离器件和比例调节电路,通过将被测对象的漏流值经过采样、隔离和信号调理等处理,测量了28V电源正负母线与相应的设备机壳电压是否平衡,是否有漏电,实现了正负母线对机壳的漏电检查,从而可以判断由该电源供电的整个系统是否存在漏电现象,并可根据具体的测量值来判断问题是否严重,是否需要解决。 [0023] The device uses isolation resistance, sampling resistor, the voltage conversion circuit, and other circuit potential, and the device isolation optocoupler ratio adjusting circuit, the leakage current value measured by the object sampled, isolation and signal conditioning process, measuring the 28V supply bus bar and the positive and negative voltage corresponding to the equipment housing is balanced, if there is leakage, to achieve a positive and negative busbars on the chassis of the leakage test, the entire system can be determined by the presence or absence of the supply of leakage, and according to the specific measurements to determine whether the problem is serious, need to be resolved. 给操作人员提供了依据。 To the operator provides the basis. 该装置电路结构简单,操作方便,可以实现在线检测,实时监控,使检测效率大大提高。 Circuit configuration which is simple, easy to operate, the detection can be achieved online, real-time monitoring, the detection efficiency is greatly improved.

Claims (10)

  1. 1.一种测量28V电源漏电的装置,其特征在于:包括隔离电阻、采样电阻、电压变换电路、等电势电路、光耦隔离器件和比例调节电路;隔离电阻分别与电源和机壳连接,起到连接和隔离作用,采样电阻的另一端与机壳连接,采样电阻将被测的泄漏电流转换为电压;电压变换电路的输出端与光耦隔离器件的输入端连接,光耦隔离器件的输出端与比例调节电路的输入端连接,电压变换电路与光耦隔离器件构成电流反馈电路,利用光耦特性完成电压精确转换和隔离;等电势电路的输入端分别与机壳和电压变换电路的反向输入端连接,等电势电路的输出端接地,等电势电路用于实现机壳与测量地的隔离;比例调节电路用于实现输出电压的调节。 1. An apparatus for measuring the leakage 28V supply, characterized by: comprising isolation resistance, sampling resistor, the voltage conversion circuit, and other circuit potential, proportional control device and the opto-isolated circuits; isolation resistance and the power supply are connected to the chassis, from isolation and connected to the other end is connected to the housing sampling resistor, the measured sample resistor leakage current into a voltage; input the output of the voltage conversion circuit is connected to the opto-isolated devices, the output of the opto-isolation device end ratio adjusting circuit connected to the input terminal, the voltage conversion circuit and optocoupler isolation devices constitute a current feedback circuit is completed using accurate voltage conversion characteristic of the optocoupler and isolation; equipotential circuit input terminals and the housing and the anti-voltage conversion circuit is connected to the input terminal, the output of the equipotential grounded circuit, and other potential isolation circuit for realizing the measurement chassis ground; ratio adjusting circuit for adjusting the output voltage to achieve.
  2. 2.根据权利要求1所述的一种测量28V电源漏电的装置,其特征在于:所述的隔离电阻共2个,两个隔离电阻的一端分别与待测28V电源的正负端连接,两个隔离电阻的另一端连接在一起,并分别与采样电阻的一端和电压变换电路的同向输入端连接。 2. A device according to one of claim 1 28V power drain of measurement as claimed in claim wherein: said isolation resistance of 2, one of the two isolation resistors are connected to the negative terminal of the 28V supply tested, two the other end of isolation resistors are connected together and connected to the input terminals of the sampling resistor with one end and the voltage conversion circuit.
  3. 3.根据权利要求2所述的一种测量28V电源漏电的装置,其特征在于:所述的隔离电阻在ΜΩ级。 The apparatus of one of said two leakage measurement 28V supply as claimed in claim wherein: said isolation resistance in ΜΩ level.
  4. 4.根据权利要求3所述的一种测量28V电源漏电的装置,其特征在于:所述的两个隔离电阻的阻值均为IMΩ。 According to claim 3, wherein one of said drain means 28V power measurements, wherein: the resistance of the two resistors are isolated IMΩ.
  5. 5.根据权利要求1所述的一种测量28V电源漏电的装置,其特征在于:所述的采样电阻选用1kD的0.1 %的精密电阻。 A The apparatus according to claim 1, leakage measurement 28V supply, wherein: the sense resistor selection 1kD 0.1% precision resistor.
  6. 6.根据权利要求1所述的一种测量28V电源漏电的装置,其特征在于:所述的电压变换电路采用集成运放OP1177及外围限流电阻实现,外围限流电阻的阻值小于1ΚΩ。 6. A method according to claim 1 28V power leakage measurement apparatus, characterized in that: said voltage converting circuit using an integrated operational amplifier and the external current limiting resistor OP1177 achieved, the peripheral resistance is less than the current limiting resistor 1ΚΩ.
  7. 7.根据权利要求1所述的一种测量28V电源漏电的装置,其特征在于:所述的光耦隔离器件光耦隔离器件采用IL300-F-X009实现,采用集成运放OPl 177和IL300-F-X009实现了电压隔离变换,电压通过IL300-F-X009的管脚5进行输出。 7. A device according to one of claim 1 28V supply leakage measurements claim wherein: said optical coupling device isolation optocoupler isolation device using IL300-F-X009 implemented using integrated operational amplifier OPl 177 and IL300- F-X009 achieve voltage isolation converting the voltage output via pin 5 IL300-F-X009 in.
  8. 8.根据权利要求1所述的一种测量28V电源漏电的装置,其特征在于:所述的光耦隔离器件隔离的电压在KV以上。 8. The apparatus of one of the claims 1 to 28V supply leakage measurement, wherein: said opto-isolation device isolation voltage KV or more.
  9. 9.根据权利要求1所述的一种测量28V电源漏电的装置,其特征在于:所述的电压比例调节电路采用OPl 177、调节电位器RPl配合外围电路实现,电压输出Vwt范围为O〜4.8Vo 9. The apparatus of one of the claims 1 to 28V power measuring leakage, characterized in that: the ratio of the voltage regulating circuit employed OPl 177, adjustment potentiometer RPl implemented with external circuit, the output voltage Vwt range O~4.8 Vo
  10. 10.根据权利要求1所述的一种测量28V电源漏电的装置,其特征在于:所述的等电势电路采用集成运放0P1177实现,用于进行机壳与测量地的隔离。 10. A method according to claim 1, said apparatus 28V supply leakage measurement, wherein: said equipotential circuit using integrated operational amplifier 0P1177 implemented, for isolating the measurement chassis ground.
CN 201510082858 2015-02-15 2015-02-15 Device for measuring electric leakage of 28V power supply CN104678247A (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1460183A (en) * 2001-03-30 2003-12-03 三洋电机株式会社 Circuit for detecting leak from power supply
CN101520472A (en) * 2009-04-09 2009-09-02 中国兵器工业集团第七○研究所 Battery jar voltage insulation test circuit based on linear optical coupler
US20120025840A1 (en) * 2009-03-16 2012-02-02 Young-Chul Kim Appratus for measuring ground leakage current in an ungrounded direct current power system, and method for same
CN203069647U (en) * 2012-12-07 2013-07-17 深圳市安邦信电子有限公司 DC high-voltage detection circuit
CN203117259U (en) * 2013-01-21 2013-08-07 中国人民解放军63963部队 Direct current leakage detection circuit
CN203324380U (en) * 2013-05-30 2013-12-04 深圳奥特迅电力设备股份有限公司 Direct-current source system insulation monitoring apparatus and monitoring host thereof
CN203643494U (en) * 2014-01-13 2014-06-11 广东瑞德智能科技股份有限公司 Isolated current detection circuit
JP2014119421A (en) * 2012-12-19 2014-06-30 Omron Automotive Electronics Co Ltd Electric leakage detector
CN204008934U (en) * 2014-03-12 2014-12-10 湖南科技学院 Electric leakage detection and alarm circuit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1460183A (en) * 2001-03-30 2003-12-03 三洋电机株式会社 Circuit for detecting leak from power supply
US20120025840A1 (en) * 2009-03-16 2012-02-02 Young-Chul Kim Appratus for measuring ground leakage current in an ungrounded direct current power system, and method for same
CN101520472A (en) * 2009-04-09 2009-09-02 中国兵器工业集团第七○研究所 Battery jar voltage insulation test circuit based on linear optical coupler
CN203069647U (en) * 2012-12-07 2013-07-17 深圳市安邦信电子有限公司 DC high-voltage detection circuit
JP2014119421A (en) * 2012-12-19 2014-06-30 Omron Automotive Electronics Co Ltd Electric leakage detector
CN203117259U (en) * 2013-01-21 2013-08-07 中国人民解放军63963部队 Direct current leakage detection circuit
CN203324380U (en) * 2013-05-30 2013-12-04 深圳奥特迅电力设备股份有限公司 Direct-current source system insulation monitoring apparatus and monitoring host thereof
CN203643494U (en) * 2014-01-13 2014-06-11 广东瑞德智能科技股份有限公司 Isolated current detection circuit
CN204008934U (en) * 2014-03-12 2014-12-10 湖南科技学院 Electric leakage detection and alarm circuit

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