CN210155270U - Handheld portable current loop impedance and current type relay tester - Google Patents
Handheld portable current loop impedance and current type relay tester Download PDFInfo
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- CN210155270U CN210155270U CN201920784004.1U CN201920784004U CN210155270U CN 210155270 U CN210155270 U CN 210155270U CN 201920784004 U CN201920784004 U CN 201920784004U CN 210155270 U CN210155270 U CN 210155270U
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Abstract
The utility model discloses a portable current loop impedance of hand-held type and current type relay tester relates to electric power system test tool field. Conventional single-phase tester of relay protection, it is bulky, test operation is loaded down with trivial details, carries the transport inconvenient in outdoor test, and water-proof effects is poor. The utility model discloses a casing, locate standard current source module, CPU module, battery module in the casing and inlay in the positive display screen of casing, the casing openly still is equipped with contact status indicator, current output coarse adjustment knob, current output fine setting knob, tester switch, AC/DC output change over switch and current loop status indicator to do water repellent. The volume is effectively reduced, the outdoor test is convenient to carry, the test operation is convenient, and the waterproof effect is good.
Description
Technical Field
The utility model relates to an electric power system test tool field especially relates to a portable current loop impedance of hand-held type and current type relay tester.
Background
The current loop plays an extremely important role in a transformer substation of a power system, and the reliability of the wiring of the current loop directly influences the sampling correctness of a protection device and a measurement device of the transformer substation and is closely related to the safe and stable operation of the protection device and the accurate measurement of power flow. Therefore, there is a test item for testing the impedance of the current loop In the debugging process, and the conventional test method is to input the ac current value of In the current loop by using a conventional relay protection single-phase tester, then measure the loop voltage, and then calculate the impedance of the current loop. The current loop impedance test is generally carried out in an outdoor CT terminal box or a relay protection indoor screen cabinet, and the test sites are multiple and scattered.
In the debugging of the transformer substation, the action value and the return value of the relay need to be checked to verify whether the relay meets the requirements. Current mode relays typically include trip/close current relays, overload start cooler current relays. For checking a tripping/closing current relay, a conventional testing method is to input a direct current value at two ends of a coil of a current type relay by using a conventional relay protection single-phase tester, and adjust the output current to enable the relay to act and return to obtain an action value and a return value of the relay. Along with the popularization of intelligent transformer substation, the relay is generally concentrated inside the intelligent terminal in the control cabinet on the spot, and overload start cooler current relay generally installs in main transformer body terminal box, and the place is all outdoor and the dispersion, during the experiment, need move relay protection single-phase tester to the open air.
Because the single-phase tester of conventional relay protection is bulky, the quality is heavy, and experimental wiring is complicated, need set up in the tester during experiment, and the step is various, needs reset after the outage restarts. And need external AC power supply alone to supply power for conventional single-phase tester of relay protection, according to the ann rule requirement, must follow test power screen or overhaul the case and get the alternating current, sometimes the distance is far away, need connect a plurality of power panels, makes the experiment become very loaded down with trivial details, has increaseed the experimental degree of difficulty greatly, has also increased test time. Because the conventional relay protection single-phase tester is not waterproof, the outdoor test is greatly influenced by weather.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model and the technical task that provides are perfected and improved prior art scheme, provide a portable current loop impedance of hand-held type and current type relay tester to promote the convenience of carrying and testing as the purpose. Therefore, the utility model adopts the following technical scheme.
A hand-held portable current loop impedance and current type relay tester comprises a shell, a standard current source module, a CPU module, a battery module and a display screen, wherein the standard current source module, the CPU module and the battery module are arranged in the shell, the display screen is embedded in the front of the shell, the front of the shell is also provided with a contact state indicator lamp, a current output coarse tuning knob, a current output fine tuning knob, a tester power switch, an AC/DC output selector switch and a current loop state indicator lamp, the display screen module, the standard current source module, the battery module, the current output coarse tuning knob and the current output fine tuning knob are all electrically connected with the CPU module, and a contact input port and a standard current source output port of the standard current source module are arranged at the upper end of the shell; and the display screen is provided with an output current value, a measured voltage value, a calculated current loop impedance value, storage battery electric quantity and a current source AC/DC state display area. By adopting the structural design of integrated circuits such as a CPU module and the like, the instrument is miniaturized and intelligentized, and a power supply is arranged in the instrument, so that the instrument is more convenient to carry and test, and is convenient to carry and test movably in different places; the display screen can display the test data of the ammeter and the voltmeter fed back by the CPU module, and can also display the AC/DC state and the impedance value of the current loop; the contact state indicator lamp is used for indicating the state indication of the action value and the return value of the current type relay.
As a preferable technical means: the tester power switch and the AC/DC output change-over switch are both push switches. The push switch has simple structure and high reliability and is convenient for waterproof treatment.
As a preferable technical means: the battery module is a rechargeable battery, and the lower end of the shell is provided with a battery charging interface. The charging of the built-in battery can be conveniently realized.
As a preferable technical means: the upper part of the shell is in a rectangular plane shape, two sides of the lower part of the shell are in an arc shape which is concave inwards towards the middle, and the width between the two sides of the lower part is 7-9 cm. The upper structure is convenient for arranging larger components, the lower structure and the width dimension are convenient for holding by hands, and the hand holding operation can be conveniently realized.
As a preferable technical means: the display screen inlay in the middle of casing upper portion, current loop status indicator lamp and contact status indicator lamp be located the upper left corner outside and the upper right corner outside of display screen respectively, AC/DC output change over switch and tester switch be located the left and right sides at casing middle part respectively, current output coarse adjusting knob and current output fine adjusting knob from last down locating the casing lower part. Reasonable layout, compact structure and small volume.
As a preferable technical means: the casing include front casing and drain pan, the structure department that matches of front casing and drain pan establishes waterproof sealing, the embedding window of display screen and front casing between establish waterproof sealing, AC/DC output change over switch and tester switch establish waterproof sealing. Can effectively promote the waterproof performance at connection position, promote the protective capacities, promote outdoor test's security.
As a preferable technical means: the casing openly be equipped with the water proof membrane, current circuit status indicator lamp and contact status indicator lamp all be equipped with the water proof membrane below. Can effectively promote the waterproof performance of pilot lamp position, promote the protective capacities better.
As a preferable technical means: the contact input port, the standard current source output port and the storage battery charging interface are all provided with waterproof plugs, and one side of each waterproof plug is connected with the shell. In the instrument carrying process, the waterproof plug can prevent dust, water vapor and water drops from entering the interface to cause influence, and can effectively reduce the use problem caused by the oxidation of the interface or the dust sealing and the like.
Has the advantages that:
1. small volume, light weight, convenient holding by one hand and convenient carrying.
2. Through standard contact input port and standard current source output port, the wiring is simple, convenient operation, and the display screen shows the test data that the content includes ampere meter and voltmeter, and alternating current-direct current output mode switches conveniently, need not to change experimental wiring, and ampere meter, voltmeter type also switch in step, need not to set up the meter type alone, and the test is convenient.
3. The rechargeable storage battery module is adopted for supplying power, and an external alternating current power supply is not required to be connected during testing.
4. The function is various, can output alternating current and direct current, can be used to test the impedance value of the current loop, also can be used to check the action value and the return value of the current type relay.
5. The waterproof effect is good, can test in the open air rainy day, receives weather factor influence for a short time, can adapt to different service environment, safe and reliable.
Drawings
Fig. 1 is a schematic view of the front structure layout of the present invention.
Fig. 2 is a schematic diagram of the layout of the internal modules of the present invention.
In the figure: 1-standard current source output port; 2-a contact input port; 3-contact status indicator light; 4-a display screen; 5-power switch of tester; 6-current output coarse adjustment knob; 7-current output fine adjustment knob; 8-a storage battery charging interface; 9-AC/DC output change-over switch; 10-current loop status indicator light; 11-standard current source module; 12-a CPU module; 13-a rechargeable battery module; 14-a housing.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1-2, a hand-held portable current loop impedance and current type relay tester comprises a housing 14, a standard current source module 11, a CPU module 12, a battery module and a display screen 4, wherein the standard current source module 11, the CPU module 12 and the battery module are arranged in the housing 14, the display screen 4 is embedded in the front surface of the housing 14, the front surface of the housing 14 is also provided with a contact state indicator lamp 3 and a current output coarse adjustment knob 6, the current output fine adjustment knob 7, the tester power switch 5, the AC/DC output switch 9 and the current loop state indicator lamp 10, the display screen 4 module, the standard current source module 11, the battery module, the current output coarse adjustment knob 6 and the current output fine adjustment knob 7 are all electrically connected with the CPU module 12, and the contact input port 2 and the standard current source output port 1 of the standard current source module 11 are arranged at the upper end of the shell 14; the display screen 4 is provided with an output current value, a measured voltage value, a calculated current loop impedance value, storage battery electric quantity and a current source AC/DC state display area.
In order to realize higher switching reliability, the tester power switch 5 and the AC/DC output changeover switch 9 are both push-type switches. The push switch has simple structure and high reliability and is convenient for waterproof treatment.
In order to realize battery charging, the battery module is a rechargeable battery, and the lower end of the shell 14 is provided with a battery charging interface 8. The charging of the built-in battery can be conveniently realized.
In order to facilitate the hand-holding operation, the upper part of the shell 14 is in a rectangular plane shape, two sides of the lower part of the shell 14 are in an arc shape which is concave towards the middle, and the width between the two sides of the lower part is 7-9 cm. The upper structure is convenient for arranging larger components, the lower structure and the width dimension are convenient for holding by hands, and the hand holding operation can be conveniently realized.
In order to make the structure compact and reasonable, the display screen 4 is embedded in the middle of the upper part of the shell 14, the current loop state indicator lamp 10 and the contact state indicator lamp 3 are respectively positioned on the outer side of the upper left corner and the outer side of the upper right corner of the display screen 4, the AC/DC output change-over switch 9 and the tester power switch 5 are respectively positioned on the left side and the right side of the middle part of the shell 14, and the current output coarse adjustment knob 6 and the current output fine adjustment knob 7 are arranged on the lower part of the shell 14 from top to bottom. Reasonable layout, compact structure and small volume.
In order to improve the protection capability, the shell 14 comprises a front shell and a bottom shell, a waterproof sealing piece is arranged at the matched structure of the front shell and the bottom shell, a waterproof sealing piece is arranged between the display screen 4 and the embedded window of the front shell, and a waterproof sealing piece is arranged on the AC/DC output change-over switch 9 and the tester power switch 5. Can effectively promote the waterproof performance at connection position, promote the protective capacities, promote outdoor test's security.
In order to improve the protection capability, the front surface of the shell 14 is provided with a waterproof film, and the current loop status indicator lamp 10 and the contact status indicator lamp 3 are both arranged below the waterproof film. Can effectively promote the waterproof performance of pilot lamp position, promote the protective capacities better.
In order to reduce interface fault, contact input port 2, standard current source output port 1 and battery charge interface 8 all are equipped with waterproof stopper, and one side and the casing 14 of waterproof stopper are connected. In the instrument carrying process, the waterproof plug can prevent dust, water vapor and water drops from entering the interface to cause influence, can effectively reduce the use problem caused by the oxidation of the interface or the dust sealing and the like, and reduce the interface fault.
When the instrument is used for carrying out a current loop impedance test, the power switch 5 of the tester is switched to an ON position, the standard current source output port 1 is connected into a current loop, at the moment, whether the current loop is open-circuited or not can be judged through the current loop state indicator lamp 10, the test can be continuously carried out if the current loop is open-circuited, and the current loop needs to be checked and conducted if the current loop is open-circuited; the AC/DC output change-over switch 9 is switched to an AC position, the CPU module 12 is controlled by adjusting the current output coarse adjustment knob 6 and the current output fine adjustment knob 7, so that the output current of the standard current source module 11 reaches In, and the output current, the measured voltage and the current loop impedance value calculated by the CPU module 12 are observed by the display screen 4; after the test is completed, the tester power switch 5 is turned to the OFF position.
When the instrument is used for checking the current type relay, the power switch 5 of the tester is switched to an ON position, the output port 1 of the standard current source is connected to two ends of a coil of the current type relay, at the moment, whether wiring is correct or not can be judged through the current loop state indicator lamp 10, if wiring is correct, checking can be continuously carried out, and if wiring is wrong, wiring needs to be adjusted to be correct; the relay contact is led out and connected with a contact input port 2 in parallel, an AC/DC output selector switch 9 is switched to a DC position, a CPU module 12 is controlled by adjusting a current output coarse adjustment knob 6 and a current output fine adjustment knob 7 to increase or decrease the output current of a standard current source module 11, and the action and return conditions of the relay are monitored by a contact state indicator lamp 3, so that the action value and the return value of the relay are obtained; after the test is completed, the tester power switch 5 is turned to the OFF position.
When the electric quantity of the storage battery is insufficient, the charging module matched with the tester can be used for charging the rechargeable storage battery module 13 through the storage battery charging interface 8, the rechargeable storage battery module 13 has a charging protection function, and the power supply input can be automatically disconnected after the rechargeable storage battery module is fully charged.
The above portable hand-held current loop impedance and current type relay tester shown in fig. 1-2 is a specific embodiment of the present invention, which embodies the substantial features and improvements of the present invention, and can modify the same in terms of shape, structure, etc. according to the practical needs of use, all within the scope of protection of the present solution.
Claims (8)
1. The utility model provides a portable current loop impedance of hand-held type and current type relay tester which characterized in that: comprises a shell (14), a standard current source module (11), a CPU module (12), a battery module and a display screen (4), the standard current source module (11), the CPU module (12) and the battery module are arranged in the shell (14), the display screen (4) is embedded in the front surface of the shell (14), the front surface of the shell (14) is also provided with a contact state indicator lamp (3), a current output coarse adjustment knob (6), a current output fine adjustment knob (7), a tester power switch (5), an AC/DC output switch (9) and a current loop state indicator lamp (10), the display screen (4) module, the standard current source module (11), the battery module, the current output coarse adjustment knob (6) and the current output fine adjustment knob (7) are electrically connected with the CPU module (12), and the contact input port (2) and the standard current source output port (1) of the standard current source module (11) are arranged at the upper end of the shell (14); and the display screen (4) is provided with an output current value, a measured voltage value, a calculated current loop impedance value, storage battery electric quantity and a current source AC/DC state display area.
2. A hand-held portable current loop impedance and current type relay tester according to claim 1, wherein: the tester power switch (5) and the AC/DC output switch (9) are both push switches.
3. A hand-held portable current loop impedance and current type relay tester according to claim 1, wherein: the battery module is a rechargeable battery, and the lower end of the shell (14) is provided with a battery charging interface (8).
4. A hand-held portable current loop impedance and current type relay tester according to claim 1, wherein: the upper part of the shell (14) is in a rectangular plane shape, two sides of the lower part of the shell (14) are in an arc shape which is concave towards the middle, and the width between the two sides of the lower part is 7-9 cm.
5. A hand-held portable current loop impedance and current mode relay tester as claimed in claim 4, wherein: display screen (4) inlay in the middle of casing (14) upper portion, current loop status indicator lamp (10) and contact status indicator lamp (3) be located the upper left corner outside and the upper right corner outside of display screen (4) respectively, AC/DC output change over switch (9) and tester switch (5) be located the left and right sides at casing (14) middle part respectively, casing (14) lower part is down located from last to current output coarse adjustment knob (6) and current output fine adjustment knob (7).
6. A hand-held portable current loop impedance and current mode relay tester as claimed in claim 4, wherein: the shell (14) comprises a front shell and a bottom shell, a waterproof sealing piece is arranged at a matched structure of the front shell and the bottom shell, the waterproof sealing piece is arranged between the display screen (4) and an embedded window of the front shell, and the waterproof sealing piece is arranged on the AC/DC output switching switch (9) and the tester power switch (5).
7. A hand-held portable current loop impedance and current mode relay tester as claimed in claim 5, wherein: the casing (14) openly be equipped with the water proof membrane, current loop status indicator lamp (10) and contact status indicator lamp (3) all be equipped with the water proof membrane below.
8. A hand-held portable current loop impedance and current type relay tester according to claim 3, wherein: contact input port (2), standard current source output port (1) and battery charge interface (8) all be equipped with the waterproof stopper, one side and casing (14) of waterproof stopper are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920784004.1U CN210155270U (en) | 2019-05-28 | 2019-05-28 | Handheld portable current loop impedance and current type relay tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920784004.1U CN210155270U (en) | 2019-05-28 | 2019-05-28 | Handheld portable current loop impedance and current type relay tester |
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| Publication Number | Publication Date |
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| CN210155270U true CN210155270U (en) | 2020-03-17 |
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| CN201920784004.1U Active CN210155270U (en) | 2019-05-28 | 2019-05-28 | Handheld portable current loop impedance and current type relay tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034334A (en) * | 2020-08-31 | 2020-12-04 | 龙铁纵横（北京）轨道交通科技股份有限公司 | Rail transit locomotive safety loop relay function testing device and method |
-
2019
- 2019-05-28 CN CN201920784004.1U patent/CN210155270U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034334A (en) * | 2020-08-31 | 2020-12-04 | 龙铁纵横（北京）轨道交通科技股份有限公司 | Rail transit locomotive safety loop relay function testing device and method |
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