CN211123117U - Check meter for insulation monitoring device of direct current system - Google Patents
Check meter for insulation monitoring device of direct current system Download PDFInfo
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- CN211123117U CN211123117U CN201921220915.8U CN201921220915U CN211123117U CN 211123117 U CN211123117 U CN 211123117U CN 201921220915 U CN201921220915 U CN 201921220915U CN 211123117 U CN211123117 U CN 211123117U
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- 238000009413 insulation Methods 0.000 title claims abstract description 47
- 238000012806 monitoring device Methods 0.000 title claims abstract description 44
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The utility model belongs to the field of insulation monitoring of a direct current system, in particular to a direct current system insulation monitoring device calibrator, which comprises a signal transmitting device; the square box-shaped shell is internally provided with a power supply, a signal receiving module, an on-off switch and an adjustable resistor, wherein the signal receiving module is respectively connected with the power supply and the on-off switch, the on-off switch is connected with the adjustable resistor, an adjusting knob of the adjustable resistor is exposed out of the shell, the shell is provided with an input end interface and an earthing end interface, and the input end interface, the on-off switch, the adjustable resistor and the earthing end interface are sequentially connected to form a detection loop. After the direct current system insulation monitoring device calibrator is connected to the direct current system insulation monitoring device, the adjustable resistor is continuously adjusted until the insulation monitoring device sends out an early warning or warning signal, the resistance value of the adjustable resistor at the moment is recorded, and the resistance value is the actual early warning or warning value of the insulation monitoring device, so that the insulation monitoring device is calibrated.
Description
Technical Field
The utility model belongs to direct current system insulation monitoring field, concretely relates to direct current system insulation monitoring device check gauge.
Background
The direct current power supply system is used for providing a power supply for normal operation and an accident power supply for rapid recovery after a power grid fault for loads such as control, protection, communication and the like; the device is important equipment for ensuring safe operation of a booster station, a transformer substation, a converter station and the like of a power plant; the insulation monitoring device is one of the important means for ensuring the normal operation of the dc power system. The performance of the insulation monitoring device directly affects the safe operation of the dc power system, and therefore, the insulation monitoring device must be subjected to relevant detection and examination and verification.
At present, the insulation monitoring device of the direct current system widely adopts the principle of a balance bridge to monitor direct current grounding, as shown in figure 1. The resistors R1 ', R2' and the relay J in FIG. 1 are basic units constituting the insulation monitoring device. Usually, the resistance values of R1 'and R2' are equal and are both 1K omega, the relay J adopts a direct current low-current relay, and the resistances R + and R-are the ground resistance of the anode and the cathode of the direct current system respectively. Under normal conditions, R + and R-are both infinite, the insulation monitoring device does not give an early warning or alarm, and only when direct current grounding or insulation reduction occurs in the system, the early warning or alarm is given.
In the process of checking and accepting the direct current system, a resistor R' needs to be connected in series with the insulation monitoring device to check the accuracy of an alarm value of the insulation monitoring device. The method generally adopted in field work at present is that resistors with different resistance values are sequentially connected in series at the position of R' shown in figure 1 according to the sequence of the resistance values from large to small until an insulation monitoring device sends out an early warning or warning signal, then a universal meter is used for measuring the resistance value of an action resistor, the measured resistance value of the action resistor is the actual early warning or warning value of the insulation monitoring device, and the actual early warning or warning value is compared with the rated early warning or warning value of the insulation monitoring device to realize the verification of the insulation monitoring device. However, since the resistors with different resistance values need to be replaced, the method is long in time consumption, poor contact may be caused when the resistors are connected into the lead, and the measurement error is large due to the large loop resistance value.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a DC system insulation monitoring device check gauge, can be accurate convenient measure DC system insulation monitoring device's actual early warning or alarm value, realize the check-up to insulation monitoring device.
In order to achieve the above object, the utility model provides a flow system insulation monitoring device check gauge, include:
a signal transmitting device;
the square box-shaped shell is internally provided with a power supply, a signal receiving module, an on-off switch and an adjustable resistor, wherein the signal receiving module is respectively connected with the power supply and the on-off switch, the on-off switch is connected with the adjustable resistor, an adjusting knob of the adjustable resistor is exposed out of the shell, the shell is provided with an input end interface connected with the on-off switch and a ground end interface connected with the adjustable resistor, and the input end interface, the on-off switch, the adjustable resistor and the ground end interface are sequentially connected to form a detection loop.
Preferably, the number of the detection loops is at least four, and the signal transmitting device is provided with control buttons respectively corresponding to the four detection loops.
Furthermore, a warning lamp is arranged on the shell and connected in parallel to two ends of the on-off switches of the four detection loops.
Furthermore, four indicator lights are arranged on the shell and are respectively connected in parallel at two ends of the adjustable resistors of the four detection loops.
Preferably, the signal receiving module is a digital integrated chip circuit including a SYN470R wireless receiving chip and a U L N2003A combo transistor array.
Preferably, the signal transmitting device is a wireless remote controller, the on-off switch is an electromagnetic relay, and the adjustable resistor is a potentiometer.
The technical scheme of the utility model, the input end interface of check gauge passes through the wire and links to each other with the binding post who waits to detect DC system insulation monitoring device, the ground connection end interface passes through the wire and links to each other with the ground copper bar, signal transmission device signals for signal reception module, signal reception module receives the switch-on of controlling on-off switch behind the signal, if insulation monitoring device did not send early warning or alarm signal this moment, then adjust adjustable resistance, send early warning or alarm signal up to insulation monitoring device, note adjustable resistance's resistance this moment, this resistance is insulation monitoring device's actual early warning or alarm value promptly, thereby accomplish the check-up to insulation monitoring device.
Drawings
Fig. 1 is a schematic view of the appearance structure of the present invention;
fig. 2 is a schematic diagram of the circuit connection of the present invention.
Fig. 3 is a schematic structural diagram of the signal transmitting device of the present invention.
The reference numbers illustrate: 10. a signal transmitting device; 11. a control button; 20. a housing; 21. an input port interface; 22. a ground terminal interface; 30. a power source; 40. a signal receiving module; 50. an on-off switch; 60. An adjustable resistor; 70. a warning light; 80. indicator light
Detailed Description
The present invention will be further described with reference to fig. 1 to 2.
A check gauge for an insulation monitoring device of a direct current system comprises:
a signal transmitting device 10;
the detection circuit comprises a square box-shaped shell 20, wherein a power supply 30, a signal receiving module 40, an on-off switch 50 and an adjustable resistor 60 are arranged in the shell 20, the signal receiving module 40 is respectively connected with the power supply 30 and the on-off switch 50, the on-off switch 50 is connected with the adjustable resistor 60, an adjusting knob of the adjustable resistor 60 is exposed outside the shell 20, an input end interface 21 connected with the on-off switch 50 and a grounding end interface 22 connected with the adjustable resistor 60 are arranged on the shell 20, and the input end interface 21, the on-off switch 50, the adjustable resistor 60 and the grounding end interface 22 are sequentially connected to form a detection circuit. The input terminal interface 21 of the calibrator is connected with a wiring terminal of the insulation monitoring device of the direct current system to be detected through a wire, the grounding terminal interface 22 is connected with a grounding copper bar through a wire, the signal transmitting device 10 transmits a control signal to the signal receiving module 40, the signal receiving module 40 controls the on-off switch to be switched on after receiving the control signal, if the insulation monitoring device does not send an early warning or an alarm signal at the moment, the adjustable resistor 60 is adjusted until the insulation monitoring device sends an early warning or an alarm signal, the resistance value of the adjustable resistor 60 at the moment is recorded, the resistance value is the actual early warning or the alarm value of the insulation monitoring device, and therefore the calibration of the insulation monitoring device is completed.
The number of the detection loops is at least four, and the signal transmitting device 10 is provided with control buttons 11 respectively corresponding to the four detection loops. After the lines are connected, the four control buttons 11 of the signal transmitting device 10 are pressed, the on-off switches 50 of the corresponding four detection loops can be controlled to be connected or disconnected respectively, the resistance values of the adjustable resistors 60 on the four detection loops are different, after the resistance values of the four adjustable resistors 60 are adjusted once by a worker, the on-off switches 50 of the four detection loops are controlled to be connected respectively, early warning or warning signals can be sent out quickly according to the insulation monitoring device, and the actual early warning or warning value of the insulation monitoring device can be found.
The shell 20 is provided with a warning lamp 70, and the warning lamp 70 is connected in parallel at two ends of the on-off switches 50 of the four detection loops. By arranging the warning lamp 70 in parallel with the on-off switch 50, when the on-off switch 50 is closed, the warning lamp 70 is turned on, and the state of the on-off switch 50 can be visually observed.
Four indicator lamps 80 are arranged on the housing 20, and the four indicator lamps 80 are respectively connected in parallel at two ends of the adjustable resistors 60 of the four detection loops. The four indicating lamps 80 are respectively connected in parallel with the adjustable resistors 60 of the four detection loops, so that whether the adjustable resistors 60 are connected or not can be visually observed, if the indicating lamps 80 of the detection loops are on, the adjustable resistors 60 of the detection loops are safely connected, and if the indicating lamps 80 of the detection loops are not on, the access faults of the adjustable resistors 60 are indicated.
The signal receiving module 40 is a digital integrated chip circuit, the digital integrated chip circuit comprises a SYN470R wireless receiving chip and a U L N2003A composite transistor array, the digital integrated chip circuit adopts a SYN470R wireless receiving chip and a U L N2003A composite transistor array to carry out circuit design, wherein the SYN470R signal receiving chip processes a control signal received by a coupling coil, the control signal is converted and output into a digital signal, and the digital signal can directly drive the on-off of the on-off switch 5 after being amplified by the U L N2003A composite transistor array.
The signal transmitting device 10 is a wireless remote controller, the on-off switch 50 is an electromagnetic relay, and the adjustable resistor 60 is a potentiometer. The wireless remote controller sends control commands by taking wireless electromagnetic waves as carriers, has strong anti-interference capability, mature technology and low price; the on-off switch 50 adopts an electromagnetic relay, so that a plurality of contacts are provided, alternating current and direct current are compatible, and the service life is long; the adjustable resistor 60 is a potentiometer, the resistance value of the potentiometer is continuously adjustable, the precision is high, and the resistance value can be accurately displayed.
Claims (6)
1. The utility model provides a direct current system insulation monitoring device check gauge which characterized in that includes:
a signal emitting device (10);
the square box-shaped shell (20) is arranged, a power supply (30) is arranged in the shell (20), a signal receiving module (40), an on-off switch (50) and an adjustable resistor (60) are arranged in the shell (20), the signal receiving module (40) is respectively connected with the power supply (30) and the on-off switch (50), the on-off switch (50) is connected with the adjustable resistor (60), an adjusting knob of the adjustable resistor (60) is exposed out of the shell (20), an input end interface (21) connected with the on-off switch (50) and a ground end interface (22) connected with the adjustable resistor (60) are arranged on the shell (20), and the input end interface (21), the on-off switch (50), the adjustable resistor (60) and the ground end interface (22) are sequentially connected to form a detection loop.
2. The dc system insulation monitoring device calibrator of claim 1, wherein: the number of the detection loops is at least four, and the signal transmitting device (10) is provided with control buttons (11) corresponding to the four detection loops respectively.
3. The dc system insulation monitoring device calibrator of claim 1 or 2, wherein: and the shell (20) is provided with a warning lamp (70), and the warning lamp (70) is connected in parallel at two ends of the on-off switches (50) of the four detection loops.
4. The dc system insulation monitoring device calibrator of claim 1 or 2, wherein: four indicating lamps (80) are arranged on the shell (20), and the four indicating lamps (80) are respectively connected to two ends of the adjustable resistors (60) of the four detection loops in parallel.
5. The direct current system insulation monitoring device calibrator according to claim 1, wherein the signal receiving module (40) is a digital integrated chip circuit, and the digital integrated chip circuit comprises a SYN470R wireless receiving chip and a U L N2003A compound transistor array.
6. The dc system insulation monitoring device calibrator of claim 1, wherein: the signal transmitting device (10) is a wireless remote controller, the on-off switch (50) is an electromagnetic relay, and the adjustable resistor (60) is a potentiometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921220915.8U CN211123117U (en) | 2019-07-30 | 2019-07-30 | Check meter for insulation monitoring device of direct current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921220915.8U CN211123117U (en) | 2019-07-30 | 2019-07-30 | Check meter for insulation monitoring device of direct current system |
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| Publication Number | Publication Date |
|---|---|
| CN211123117U true CN211123117U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921220915.8U Active CN211123117U (en) | 2019-07-30 | 2019-07-30 | Check meter for insulation monitoring device of direct current system |
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| Country | Link |
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| CN (1) | CN211123117U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589210A (en) * | 2021-08-27 | 2021-11-02 | 广东电网有限责任公司 | Portable grounding test device and method for DC power supply system for plant station |
-
2019
- 2019-07-30 CN CN201921220915.8U patent/CN211123117U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589210A (en) * | 2021-08-27 | 2021-11-02 | 广东电网有限责任公司 | Portable grounding test device and method for DC power supply system for plant station |
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