CN208399616U - A kind of monitor of the CT secondary circuit integrality for service without power-off - Google Patents
A kind of monitor of the CT secondary circuit integrality for service without power-off Download PDFInfo
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- CN208399616U CN208399616U CN201820646395.6U CN201820646395U CN208399616U CN 208399616 U CN208399616 U CN 208399616U CN 201820646395 U CN201820646395 U CN 201820646395U CN 208399616 U CN208399616 U CN 208399616U
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- programmable logic
- logic device
- current acquisition
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000002474 experimental method Methods 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 208000032368 Device malfunction Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The utility model relates to a kind of monitors of CT secondary circuit integrality for service without power-off, including casing, four pincerlike open-core transformers, tri- tunnel current acquisition module of reset key and casing Nei, A/D conversion module, programmable logic device, I/O control of export module and buzzer, four pincerlike open-core transformers are connected by the port being arranged on casing with tri- tunnel current acquisition module of casing Nei, three tunnel current acquisition modules, A/D conversion module, programmable logic device, I/O control of export module, buzzer is connected in turn, reset key is mounted on casing and is connected with programmable logic device.The utility model structure is concise, it is safe and reliable, suitable size, be convenient for carrying; for relay protection of power system checking experiment, primary switch do not have a power failure and in experiment that secondary loop of mutual inductor needs to change; one can be completed circuit associated connections and test job, the safety of significant increase checking experiment work and working efficiency.
Description
Technical field
The utility model belongs to Relay Protection Technology in Power System field, especially a kind of CT bis- for service without power-off
The monitor of minor loop integrality.
Background technique
In primary equipment operational process in the power system, if current transformer is opened a way, then primary current will
It is completely used for excitation, is saturated iron core seriously, the magnetic flux of alternation will induce very high voltage on secondary coil, and peak value can
Up to several kilovolts or even volts up to ten thousand, coil insulation overheat is caused to damage, grave danger is caused to the person and equipment safety, is even resulted in
Protective device malfunction.
In addition, relay protection secondary circuit often needs to overhaul and test due to all kinds of, such as protective device replacement,
CT current loop secondary side, must reliably be shorted, otherwise by the defect processings of all kinds of cards, secondary circuit transformation etc. at this time
Discharge spark can be generated on secondary circuit, threaten the safety of the person and equipment.At present, it is common practice to primary in protection room
Equipment is sent a telegram here in terminal block, and with three short-circuit lines by after A, B, C three-phase shortcircuit, open terminal arranges the electric current connection sheet of upper and lower mouth,
It is tested again.This method the problem is that: if short-circuit line be shorted bad or later experiments when accidentally touch, mis-wired,
CT secondary side can be also set to open a way.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of design rationally, be easy to find failure
And the monitor of the safe and reliable CT secondary circuit integrality for service without power-off.
The utility model solves its technical problem and adopts the following technical solutions to achieve:
A kind of monitor of the CT secondary circuit integrality for service without power-off, including casing, four pincerlike openings are mutual
Tri- tunnel current acquisition module of sensor, reset key and casing Nei, A/D conversion module, programmable logic device, the outlet I/O control
Molding block and buzzer, described four pincerlike open-core transformers are adopted by the port being arranged on casing with tri- road electric current of casing Nei
Collection module be connected, three tunnel current acquisition module, A/D conversion module, programmable logic device, I/O control of export module,
Buzzer is connected in turn, and the reset key is mounted on casing and is connected with programmable logic device.
It is also equipped with alarm lamp on casing and is connected with the I/O control of export module in casing.
The pincer open-core transformer uses ZH-KCT110 device, and three tunnel current acquisition module uses ZH-40032
Module, the A/D conversion module use DAC38J84 chip, and the programmable logic device uses GAL16V8 module, the I/
O control of export module uses ZH-YX1210 module.
The advantages and positive effects of the utility model are as follows:
1, the utility model utilizes the principle of vector test hexagonal figure, eliminates voltage referring to circuit, is open using pincer
Mutual inductor acquires secondary loop current size and Orientation in real time, and is calculated by programmable logic device, and current loop is worked as
There are unusual fluctuation, open a way, lose equal problem when alarm at the first time, remind operation maintenance personnel to be handled in time, avoid and only use
Short-circuit line, which is shorted secondary circuit, does not have the risk of monitoring, alarming when checking experiment being caused to operate.
2, the utility model is designed reasonably, structure is concise, it is safe and reliable, suitable size, be convenient for carrying, be used for power train
System relay protection checking experiment, primary switch do not have a power failure in experiment that secondary loop of mutual inductor needs to change, one is
Achievable circuit associated connections and test job, the safety of significant increase checking experiment work, improve field operation
Working efficiency.
Detailed description of the invention
Fig. 1 is the structure chart of the utility model；
Fig. 2 is the application principle figure of the utility model.
Specific embodiment
The utility model is further described below in conjunction with attached drawing.
A kind of monitor of the CT secondary circuit integrality for service without power-off, as shown in Figures 1 and 2, including casing,
Four pincerlike open-core transformers, A/D conversion module, can be compiled tri- tunnel current acquisition module of reset key, alarm lamp and casing Nei
Journey logical device, I/O control of export module and buzzer, described four pincerlike open-core transformers pass through the port being arranged on casing
It is connected with tri- tunnel current acquisition module of casing Nei, three tunnel current acquisition module, A/D conversion module, programmable logic
Device, I/O control of export module, buzzer are connected in turn, and the reset key is mounted on casing and patrols with programmable
It collects device to be connected, the alarm lamp is mounted on casing and is connected with I/O control of export module.
In the present embodiment, the pincerlike open-core transformer uses ZH-KCT110 device, three tunnel current acquisition module
Using ZH-40032 module, the A/D conversion module uses DAC38J84 chip, and the programmable logic device uses
GAL16V8 module, the I/O control of export module use ZH-YX1210 module.
The utility model can be realized current vector test and light warning function, in test, by pincer opening mutual inductance
Device is stuck on secondary current Ia, Ib, Ic, Io between primary equipment room switch CT secondary circuit and connecting terminal block, then will
Tester is placed on the good planar device of heat dissipation, is turned on the power switch, can be carried out follow-up test.When current loop occurs
When unusual fluctuation, buzzer siren is sounded an alarm while alarm lamp is lighted, and carries out trouble-shoots and processing by testing crew, can after recovery
To continue to test.
It is emphasized that embodiment described in the utility model be it is illustrative, without being restrictive, therefore this reality
It is all practical new according to this by those skilled in the art with novel including being not limited to embodiment described in specific embodiment
The other embodiments that the technical solution of type obtains also belong to the range of the utility model protection.
Claims (3)
1. a kind of monitor of the CT secondary circuit integrality for service without power-off, it is characterised in that: including casing, four pincers
Tri- tunnel current acquisition module of shape open-core transformer, reset key and casing Nei, A/D conversion module, programmable logic device, I/
O control of export module and buzzer, described four pincerlike open-core transformers pass through three in the port and casing being arranged on casing
Road current acquisition module is connected, three tunnel current acquisition module, A/D conversion module, programmable logic device, the outlet I/O
Control module, buzzer are connected in turn, and the reset key is mounted on casing and is connected with programmable logic device.
2. a kind of monitor of CT secondary circuit integrality for service without power-off according to claim 1, feature
It is: is also equipped with alarm lamp on casing and is connected with the I/O control of export module in casing.
3. a kind of monitor of CT secondary circuit integrality for service without power-off according to claim 1 or 2, special
Sign is: the pincer open-core transformer uses ZH-KCT110 device, and three tunnel current acquisition module uses ZH-40032 mould
Block, the A/D conversion module use DAC38J84 chip, and the programmable logic device uses GAL16V8 module, the I/O
Control of export module uses ZH-YX1210 module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820646395.6U CN208399616U (en) | 2018-05-03 | 2018-05-03 | A kind of monitor of the CT secondary circuit integrality for service without power-off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820646395.6U CN208399616U (en) | 2018-05-03 | 2018-05-03 | A kind of monitor of the CT secondary circuit integrality for service without power-off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208399616U true CN208399616U (en) | 2019-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820646395.6U Active CN208399616U (en) | 2018-05-03 | 2018-05-03 | A kind of monitor of the CT secondary circuit integrality for service without power-off |
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| Country | Link |
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| CN (1) | CN208399616U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488137A (en) * | 2019-09-03 | 2019-11-22 | 广东电网有限责任公司 | A kind of apparatus and method detecting CT secondary circuit integrality |
-
2018
- 2018-05-03 CN CN201820646395.6U patent/CN208399616U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488137A (en) * | 2019-09-03 | 2019-11-22 | 广东电网有限责任公司 | A kind of apparatus and method detecting CT secondary circuit integrality |
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