CN2893719Y - Single-phase and three phase anti-thunder electronic type electric energy meter - Google Patents
Single-phase and three phase anti-thunder electronic type electric energy meter Download PDFInfo
- Publication number
- CN2893719Y CN2893719Y CN 200620058948 CN200620058948U CN2893719Y CN 2893719 Y CN2893719 Y CN 2893719Y CN 200620058948 CN200620058948 CN 200620058948 CN 200620058948 U CN200620058948 U CN 200620058948U CN 2893719 Y CN2893719 Y CN 2893719Y
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- phase
- energy meter
- electric energy
- lightning
- thunder
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- Expired - Lifetime
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- 230000001419 dependent effect Effects 0.000 claims description 20
- 230000006378 damage Effects 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract 1
- 230000006698 induction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a single-phase and three phase anti-thunder electronic type electric energy meter which belongs to the technical filed of electronic type electric energy meter. The anti-thunder electronic type electric energy meter can effectively prevent thunder current from entering into the electronic circuit inside the meter through the input end of the power supply, thus protects the electronic elements inside the meter from damage. For this, a switch type anti-thunder modular is parallel connected to the power supply input end of each phase of the single-phase or three-phase electronic type electric energy meter. The anti-thunder modular is composed of a piezo-resistor and a discharge tube connected in series. To avoid short circuit at the input end of the power supply, a thermal trip can also be connected in series to the switch type anti-thunder modular. The utility model mainly applies to single-phase or three-phase-four-wire electronic type electric energy meter for thunder proof and short-circuit prevention of the input power supply.
Description
Technical field
The utility model relates to the electronic metering field of instrumentation technology, particularly a kind of single-phase, three-phase lightning protection electronic electric energy meter.
Background technology
Electronic electric energy meter in the city, the rural area is extensive use of.Because electronic electric energy meter is different from the mechanical induction type electric energy meter, it is made up of electronic devices and components and integrated circuit, so be subjected to responding to thunder and superpotential attack destruction easily.Therefore, increase lightning protection function single-phase, three phases electronic energy meter, exempt from damage to crops caused by thunder and superpotential destruction, just become the problem that people are eager to solve with the electronic devices and components of protecting electronic electric energy meter internal electron circuit.
Summary of the invention
The purpose of this utility model is to provide a kind of single-phase, three-phase lightning protection electronic electric energy meter; it can prevent lightning current in power input is invaded electronic electric energy meter the electronic circuit effectively, thereby has protected the electronic electric energy meter internal electronic component to exempt from damage.
The technical solution that the utility model proposed is such: a kind of single-phase, three-phase lightning protection electronic electric energy meter, comprise single-phase, three phases electronic energy meter, be parallel with the switching mode lightning-protection module at single-phase, the every phase power input of three phases electronic energy meter, described switching mode lightning-protection module is in series by voltage dependent resistor (VDR) and discharge tube.Also be in series with thermal trip at the switching mode lightning-protection module.Access switching mode lightning-protection module in parallel respectively between the input end three-phase of described three-phase lightning protection electronic electric energy meter and the ground wire, this lightning-protection module is in series by three voltage dependent resistor (VDR)s that are connected in parallel and a discharge tube, discharge tube one end is connected with the common port of the voltage dependent resistor (VDR) of three parallel connections, this discharge tube other end ground connection, the other end of described three voltage dependent resistor (VDR)s respectively with the input end three-phase between the thermal trip of connecting, constitute three-phase and four-line lightning-protection module assembly.Select the voltage dependent resistor (VDR) through-current capability in the 5-10KA scope, select the discharge tube through-current capability in the 5-10KA scope.
Compared with prior art, the utlity model has following beneficial effect:
(1) at the power input paralleling switch type lightning-protection module of electronic electric energy meter, this lightning-protection module is in series by a 10KA voltage dependent resistor (VDR) and a 10KA discharge tube.When input supply terminal produces induction lightening stream; voltage dependent resistor (VDR) and discharge tube be conducting immediately in time nanosecond; lightning current is released on the N line; thereby stoped lightning current to invade on the electronic devices and components of electronic circuit in the electronic electric energy meter; prevented that these electronic devices and components from wrecking, thereby played the effect of protection electronic type electronic electric energy meter and terminal device.
(2) in case cause electronic electric energy meter input end power supply short circuit in order to prevent that voltage dependent resistor (VDR) from damaging, on lightning-protection module of the present utility model, be serially connected with thermal trip again, when voltage dependent resistor (VDR) is damaged, produce high temperature and make thermal trip tripping immediately, cut off the lightning-protection module loop, thereby prevented the generation of electronic electric energy meter input supply terminal short circuit accident.
The utility model mainly is applicable to the usefulness that single-phase or three-phase and four-line electronic electric energy meter is done lightning protection, prevented the input power supply short circuit.
Description of drawings
Fig. 1 is the schematic circuit of the utility model when being used for single-phase electronic energy meter.
Fig. 2 is the lightning protection single-phase electronic energy meter structural representation that comprises circuit shown in Figure 1.
Fig. 3 is the schematic circuit of the utility model when being used for the three-phase and four-line electronic electric energy meter.
Embodiment
By following embodiment the utility model is further elaborated.
Embodiment 1
Referring to Fig. 1, shown in Figure 2, a kind of single-phase lightning protection electronic electric energy meter is between input supply terminal L, the N of single-phase electronic energy meter 4 and is connected with lightning-protection module and thermal trip 1, this lightning-protection module is in series by voltage dependent resistor (VDR) 2 and discharge tube 3, thermal trip 1 with become lightning-protection module assembly 13 after lightning-protection module is connected and be attempted by between L, the N end.The voltage dependent resistor (VDR) 2 of present embodiment is selected the 10KA level for use, and discharge tube 3 is selected the 10KA level for use.
Concrete mounting structure is as follows: lightning-protection module assembly 13 inserts the power inleting terminal 12 of single-phase electronic energy meters 4, and lightning-protection module assembly 13 is fixed in the base 11 of this electronic electric energy meter 4 and is parallel with electronic circuit board 14 sum counters 15 in the table.Ground outlet is drawn in the side of this electronic electric energy meter base 11, in order to inserting the usefulness of the earth.
Embodiment 2
Referring to shown in Figure 3, a kind of three-phase and four-line lightning protection electronic electric energy meter is the input end A at three-phase and four-line electronic electric energy meter 5, B, the lightning-protection module that inserts in parallel respectively between C three-phase and the ground wire PE, this lightning-protection module is composed in series by three voltage dependent resistor (VDR)s that are connected in parallel 2 and a discharge tube 3, discharge tube 3 one ends are connected with the common port M of the voltage dependent resistor (VDR) 2 of three parallel connections, discharge tube 3 other ends are connected with ground wire PE, the other end of three voltage dependent resistor (VDR)s 2 respectively with power input A, B, CA, B, thermal trip 1 of serial connection constitutes lightning-protection module assembly 13 between the C phase line.The voltage dependent resistor (VDR) 2 of present embodiment is selected the 10KA level for use, and discharge tube 3 is selected the 10KA level for use.
Concrete mounting structure is similar to example 1.
Claims (4)
1, a kind of single-phase, three-phase lightning protection electronic electric energy meter, comprise single-phase, three phases electronic energy meter, it is characterized in that: be parallel with the switching mode lightning-protection module at single-phase, the every phase power input of three phases electronic energy meter, described switching mode lightning-protection module is in series by voltage dependent resistor (VDR) and discharge tube.
2, single-phase, three-phase lightning protection electronic electric energy meter according to claim 1, it is characterized in that: described switching mode lightning-protection module also is in series with thermal trip.
3, according to claim 1 single-phase, three-phase lightning protection electronic electric energy meter, it is characterized in that: access switching mode lightning-protection module in parallel respectively between the input end three-phase of described three-phase lightning protection electronic electric energy meter and the ground wire, this lightning-protection module is in series by three voltage dependent resistor (VDR)s that are connected in parallel and a discharge tube, discharge tube one end is connected with the common port of the voltage dependent resistor (VDR) of three parallel connections, this discharge tube other end is connected with ground wire, the other end of described three voltage dependent resistor (VDR)s respectively with the input end three-phase between the thermal trip of connecting, constitute three-phase and four-line lightning-protection module assembly.
4, single-phase, three-phase lightning protection electronic electric energy meter according to claim 1, it is characterized in that: described voltage dependent resistor (VDR) through-current capability is in the 5-10KA scope, and described discharge tube through-current capability is in the 5-10KA scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620058948 CN2893719Y (en) | 2006-05-11 | 2006-05-11 | Single-phase and three phase anti-thunder electronic type electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620058948 CN2893719Y (en) | 2006-05-11 | 2006-05-11 | Single-phase and three phase anti-thunder electronic type electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2893719Y true CN2893719Y (en) | 2007-04-25 |
Family
ID=38061880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620058948 Expired - Lifetime CN2893719Y (en) | 2006-05-11 | 2006-05-11 | Single-phase and three phase anti-thunder electronic type electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2893719Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170257B (en) * | 2007-11-30 | 2010-08-11 | 上海电科电器科技有限公司 | Backup protection unit for surge protector |
| WO2011150828A1 (en) * | 2010-11-22 | 2011-12-08 | 华为技术有限公司 | Lightning protection circuit |
| CN109390887A (en) * | 2017-08-14 | 2019-02-26 | 深圳康普盾科技股份有限公司 | A kind of combined connection box having lightning protection function |
-
2006
- 2006-05-11 CN CN 200620058948 patent/CN2893719Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170257B (en) * | 2007-11-30 | 2010-08-11 | 上海电科电器科技有限公司 | Backup protection unit for surge protector |
| WO2011150828A1 (en) * | 2010-11-22 | 2011-12-08 | 华为技术有限公司 | Lightning protection circuit |
| US9214800B2 (en) | 2010-11-22 | 2015-12-15 | Huawei Technologies Co., Ltd. | Surge protection circuit |
| CN109390887A (en) * | 2017-08-14 | 2019-02-26 | 深圳康普盾科技股份有限公司 | A kind of combined connection box having lightning protection function |
| CN109390887B (en) * | 2017-08-14 | 2024-02-02 | 深圳康普盾科技股份有限公司 | Combined junction box with lightning protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Patentee address after: 528000 No. three, Light Industrial Road 16, Chancheng District, Guangdong, Foshan Patentee address before: 528000 Guangdong province Foshan city two road section of Huashan Bay Cha Qing Ke building four floor |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070425 |
|
| EXPY | Termination of patent right or utility model |