CN104502654A - High-protection level electric meter - Google Patents
High-protection level electric meter Download PDFInfo
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- CN104502654A CN104502654A CN201410841084.1A CN201410841084A CN104502654A CN 104502654 A CN104502654 A CN 104502654A CN 201410841084 A CN201410841084 A CN 201410841084A CN 104502654 A CN104502654 A CN 104502654A
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Abstract
The invention discloses a high-protection level electric meter comprising a first shell, a display module, internal circuit boards, a second shell and connection plugs. The display module and the internal circuit boards are sequentially mounted in the first shell. The second shell is in butt joint with the first shell and fixed with the same. Due to the first shell in an integral semi-closed structure, the problem that after the electric meter is mounted on a mounting screen, wiring overexertion causes that the panel of the traditional electric meter falls is solved, design is simplified, and at the premise of enough strength, the thickness of the panel is thinned. The protection level of the panel of the electric meter reaches IP68, and the electrostatic protection level is greater than 15 KV. After a rear-end protection device is introduced, the electric meter is applicable to harsh environments, the integral protection level of the electric meter reaches IP67, the protection level of the panel reaches IP68, the integral electrostatic protection level of the electric meter is greater than 15 KV, and the charged connection plugs are isolated by the users, accordingly improving safety.
Description
Technical field
The present invention relates to ammeter, particularly relate to a kind of high-protection level ammeter.
Background technology
In today that intelligent electric meter technology reaches its maturity, the application of intelligent electric meter is more and more extensive, and market competition is also day by day fierce.User is to the performance of intelligent electric meter, and reliability requirement is more and more higher, uses under the operating environment particularly needing serious at dust, that humidity is high rugged surroundings or easily produce electrostatic, is all great test to the IP degree of protection of ammeter and electrostatic defending grade.In use easily there is the phenomenon that panel comes off in intelligent electric meter of the prior art, and the effect of waterproof, electrostatic prevention neither be good especially.
Summary of the invention
Goal of the invention: the object of this invention is to provide the ammeter that a kind of panel difficult drop-off, IP degree of protection and electrostatic defending grade are high.
Technical scheme: high-protection level ammeter of the present invention, comprises the first housing, display module, internal circuit board, the second housing and connection plug.First housing forward end is provided with panel, the first housing rear end opening.Be installed with display module and internal circuit board in first housing, the display surface of display module is towards panel rear end, and relative with display module display surface connects wire attachment internal circuit board, and internal circuit board is provided with socket.One end of second housing is arranged on the first housing rear end opening part.The second housing other end is also provided with opening, and connection plug is inserted in described socket by the second shell nozzle.
Further, left end and the right-hand member of described first housing are respectively equipped with hasp, and left end and the right-hand member of described second housing are also respectively equipped with the draw-in groove suitable with described hasp.
Further, described first housing rear end is provided with the first groove.Described second shell one end is provided with front back-up ring, is provided with forward recess outside front back-up ring.After described second housing and described first housing are installed together, the first groove, front ring outer wall and forward recess form the first container cavity jointly.
Further, front O-ring seal is provided with in described first container cavity.
Further, the other end of described second housing is also provided with terminal box, and terminal box is provided with the string holes supplying the wire of connection plug connection to pass.
Further, the described second housing other end is provided with rear back-up ring, is provided with rearward recess outside rear back-up ring.Described terminal box front end is provided with groove.After described terminal box and described second housing are installed together, groove, backstop ring outer wall and rearward recess form the second container cavity jointly.
Further, rear O-ring seal is provided with in described second container cavity.
Further, be provided with water-proof wire cover at described string holes place, the wire that described connection plug connects leads to described terminal box rear through water-proof wire cover after converging.
Further, described string holes place is also provided with gland bonnet and O-ring seal.
Further, described first housing rear end is provided with embedded screw hole, and described second housing is provided with the shell through hole that run through suitable with embedded screw hole, and described terminal box is also provided with the box through hole that run through suitable with described shell through hole.
Beneficial effect: first, first housing is the semi-closed structure of integration, panel is as a part for the first housing, make ammeter be arranged on installation to shield above, can not because of patching operations firmly excessive appearance situation about coming off as traditional electrical surface plate, improve ammeter quality, avoid the loss that accidental damage causes.Secondly, panel, as a part for the first housing, makes between ammeter panel and the first housing watchcase without the need to designing syndeton, simplify design, under the prerequisite ensureing sufficient intensity, plate thickness can design very little, thus saves the space of installing screen front.Again, when not using the rear-end protection devices such as front O-ring seal, rear O-ring seal, terminal box, water-proof wire cover, gland bonnet, O-ring seal and trip bolt, the degree of protection of ammeter panel can reach IP68, and ammeter electrostatic defending grade is greater than 15kV.Finally, before use when the rear-end protection device such as O-ring seal, rear O-ring seal, terminal box, water-proof wire cover, gland bonnet, O-ring seal and trip bolt, ammeter integral protection grade reaches IP67, panel degree of protection reaches IP68, the overall electrostatic defending grade of ammeter is greater than 15kV, and now ammeter can use under harsher environment, and charged connection plug is isolated, can not be contacted by user, improve security.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the first embodiment of the present invention;
Fig. 2 is the internal detachment structural drawing of the first embodiment of the present invention;
Fig. 3 is the structural drawing of the first housing of the present invention;
Fig. 4 is the structural drawing of the second housing of the present invention;
Fig. 5 is the part installation step schematic diagram of the first embodiment of the present invention;
Fig. 6 is the schematic diagram of the first embodiment to be assembled of the present invention;
Fig. 7 is the schematic diagram of the installation step one of the first embodiment of the present invention;
Fig. 8 is the schematic diagram of the installation step two of the first embodiment of the present invention;
Fig. 9 is the schematic diagram of the installation step three of the first embodiment of the present invention;
Figure 10 is the panel IP protection test schematic diagram of the first embodiment of the present invention;
Figure 11 is the static discharge test schematic diagram of the first embodiment of the present invention;
Figure 12 is that the first embodiment of the present invention is installing the scheme of installation on screen;
Figure 13 is the schematic diagram of the second embodiment of the present invention;
Figure 14 is the internal detachment structural drawing of the second embodiment of the present invention;
Figure 15 is the scheme of installation of the front O-ring seal of the second embodiment of the present invention;
Figure 16 is the partial side elevation view before the second embodiment of the present invention is installed after O-ring seal;
Figure 17 is the part installation steps schematic diagram of the second embodiment of the present invention;
Figure 18 is the schematic diagram of the terminal box of the second embodiment of the present invention, connection plug, gland bonnet, O-ring seal and water-proof wire cover;
Figure 19 is the partial enlarged drawing of the second embodiment of the present invention;
Figure 20 is the static discharge test schematic diagram of the second embodiment of the present invention;
Figure 21 is that the second embodiment of the present invention is installing the scheme of installation on screen.
Embodiment
Below in conjunction with accompanying drawing, further illustrate technical scheme of the present invention by embodiment.
The first embodiment of the present invention as shown in Figure 1 and Figure 2, comprises the first housing 1, display module 4, three internal circuit boards, the second housing 2, two erecting frames and three row's connection plugs.
First housing 1 comprises the panel 11 and the first housing watchcase 12 that link together, and panel 11 is located at the first housing 1 front end.First housing 1 is only in open rearward end, and respectively end is all closed for other, is semiclosed form, as shown in Figure 3.First housing watchcase 12 inwall is provided with eight gathering sills, wherein four gathering sills are arranged on the left inside wall of the first housing watchcase 12, the first gathering sill 16a, the second gathering sill 16b, the 3rd gathering sill 16c and the 4th gathering sill 16d respectively, other four gathering sills are arranged on the right inside wall of the first housing watchcase 12, are the 5th gathering sill 16e, the 6th gathering sill 16f, the 7th gathering sill 16g and the 8th gathering sill 16h respectively.Gathering sill is used to provide location during internal circuit board assembling.Correspondingly, first housing watchcase 12 is provided with a L-type support column in each gathering sill, be provided with eight L-type support columns altogether, wherein four L-type support columns are separately positioned in four gathering sills of the left inside wall of the first housing watchcase 12, the first L-type support column 15a respectively, second L-type support column 15b, 3rd L-type support column 15c and the 4th L-type support column 15d, other four L-type support columns are separately positioned in four gathering sills of the right inside wall of the first housing watchcase 12, the 5th L-type support column 15e respectively, 6th L-type support column 15f, 7th L-type support column 15g and the 8th L-type support column 15h.L-type support column is used to provide support when display module 4 assembles and location.The edge of the first housing watchcase 12 outer wall is provided with four hasps, wherein two hasps are arranged on the edge of the left outside wall of the first housing watchcase 12, the first hasp 17a and the second hasp 17b respectively, two other hasp is arranged on the edge of the right outside wall of the first housing watchcase 12, be the 3rd hasp 17c and the 4th hasp 17d respectively, it is fixing that these four hasps have been used between the first housing 1 and the second housing 2.Four corners of the first housing watchcase 12 opening part are respectively provided with an embedded screw hole, are the first embedded screw hole 18a, the second embedded screw hole 18b, the 3rd embedded screw hole 18c and the 4th embedded screw hole 18d respectively, for installing rear-end protection device.First housing watchcase 12 opening part is also provided with the first groove 19.In addition, the outer wall of the first housing watchcase 12 arranged on left and right sides is respectively provided with an erecting frame guide-track groove, is the first erecting frame guide-track groove 26a and the second erecting frame guide-track groove 26b respectively, is respectively used to the installation of the first erecting frame 3a and the second erecting frame 3b.
One end of display module 4 is display surface, and the other end is wiring face.Display surface is provided with touch pad 5 and display screen 6, as shown in Figure 2.Wiring face is provided with three display connectors, is the first display connector 30a, the second display connector 30b and the 3rd display connector 30c respectively, for the electrical connection between display module 4 and internal circuit board and fixing, as shown in Figure 8.It is inner that display module 4 is arranged on the first housing 1, and display surface is towards panel 11 rear end.Position corresponding with touch pad 5 in display module 4 and display screen 6 on panel 11 is provided with touch area 111 and viewing area 112, and as shown in Figure 1, can operate ammeter by touching touch area 111, the process of operation is presented on viewing area 112.
Three internal circuit boards have identical structure, as shown in Figure 8, are the first internal circuit board 7a, the second internal circuit board 7b and the 3rd internal circuit board 7c respectively.Each internal circuit board upper end is provided with socket, is first row socket 8a, second row socket 8b and the 3rd plug socket 8c respectively.Each internal circuit board lower end is provided with a wiring board connector, is first line board connector 29a, the second wiring board connector 29b and tertiary circuit board connector 29c respectively, for the electrical connection between internal circuit board and display module 4 and fixing.There are two projections both sides, each internal circuit board lower end, have six projections, being the first protruding 27a, the second protruding 27b, the 3rd protruding 27c, the 4th protruding 27d, the 5th protruding 27e and the 6th protruding 27f respectively, during for assembling, display module 4 being supported.In addition, the both sides of each internal circuit board have supporting surface, have six supporting surfaces, be the first supporting surface 28a, the second supporting surface 28b, the 3rd supporting surface 28c, the 4th supporting surface 28d, the 5th supporting surface 28e and the 6th supporting surface 28f respectively, during for assembling, the rear end of internal circuit board supports.
The structure of the second housing 2 as shown in Figure 4.One end of second housing 2 is provided with front back-up ring 21, is used for the location of the second housing 2 during assembling, plays the effect increasing electrostatic defending creepage distance, and coordinates with the supporting surface of internal circuit board, carry out rear end support to internal circuit board after having assembled.Be provided with forward recess 22 outside front back-up ring 21, after the second housing 2 and the first housing 1 are installed together, the first groove 19, front back-up ring 21 outer wall and forward recess 22 form the first container cavity jointly, as shown in figure 16.The other end of the second housing 2 is provided with rear back-up ring 25, is provided with rearward recess 23 outside rear back-up ring 25.The other end of the second housing 2 is also provided with three openings, is the first opening 211, second opening 212 and the 3rd opening 213 respectively, during assembling, three row's connection plugs is stretched into this three openings respectively, and then inserts in the socket of three internal circuit boards.The arranged on left and right sides of the second housing 2 is respectively equipped with two draw-in grooves, these four draw-in grooves are suitable with four hasps of the first housing 1 respectively, fixing when installing for the second housing 2 and the first housing 1, these four draw-in grooves are the first draw-in groove 20a, the second draw-in groove 20b, the 3rd draw-in groove 20c and the 4th draw-in groove 20d respectively.In addition, the second housing 2 is also provided with the shell through hole that run through suitable with the embedded screw hole of the first housing 1, is the first shell through hole 24a, the second shell through hole 24b, the 3rd shell through hole 24c and the 4th shell through hole 24d respectively.
Two erecting frames as shown in Figure 1, are the first erecting frame 3a and the second erecting frame 3b respectively.First erecting frame 3a is arranged in the first erecting frame guide-track groove 26a, and the second erecting frame 3b is arranged in the second erecting frame guide-track groove 26b, for ammeter is arranged on multiple occasion.
Three row's connection plugs are first row connection plug 14a, second row connection plug 14b and the 3rd row's connection plug 14c respectively, as shown in Figure 1.
Fig. 6 is the schematic diagram of the present invention's the first embodiment to be assembled.The ammeter of the first embodiment assembles according to following step:
(1) display module 4 is loaded the first housing 1 inner, make the display surface of display module 4 towards panel 11 rear end, the L-type support column of the first housing 1 inside carries out display surface to display module 4 and supports and left and right location, the upper and lower inwall of the first housing watchcase 12 provides upper and lower location to display module 4, as shown in Figure 5, Figure 7;
(2) three internal circuit boards are loaded the first housing 1 inside through the gathering sill of the first housing 1 inwall, gathering sill and L-type support column provide the direction, upper and lower, left and right of internal circuit board to locate jointly.Three internal circuit boards are all vertical with display module 4, and the wiring board connector of three internal circuit board lower ends connects three display connectors in display module 4 wiring face respectively, both achieve the fixing of internal circuit board, achieve again the electrical connection between internal circuit board and display module 4.Two projections of both sides, each internal circuit board lower end, support display module 4 wiring face, and display module 4 wiring face also oppositely supports internal circuit board simultaneously, as shown in Figure 5, Figure 8;
(3) second housing 2 one end are installed from the first housing 1 open rearward end, the second housing 2 and the first housing 1 are docking together, and are fixed by hasp being buckled into corresponding draw-in groove, as shown in Figure 5, Figure 9;
(4) three row's connection plugs are each passed through from three opening parts of second housing 2 other end, insert in the socket of internal circuit board respectively.
After the first embodiment completes assembling, for testing IP degree of protection and the electrostatic defending performance of its panel 11, carry out IP protection test and the static discharge test of panel 11 respectively.Test ammeter 36 wherein used is aforementioned the first embodiment of the present invention.
The IP protection test of the panel 11 of the first embodiment as shown in Figure 10, test ammeter 36 is fixed in test box 372 by erecting frame, carry out the sealing of box body with O-ring seal after O-ring seal before box 371 and box 373, load test screw 375 after mounting box bonnet 374, then test.Test findings is that the IP degree of protection of the panel 11 of the first embodiment can reach IP68.
The static discharge test of the first embodiment as shown in figure 11.When carrying out static discharge test, because the panel 11 of the first housing 1 is as a whole and there is not gap to open rearward end place, therefore, on panel 11, the electrostatic at L12 place, first dozen of electrostatic position L11 and second dozen of electrostatic position cannot enter in ammeter to destroy device.Further, according to static discharge testing requirements, do not beat electrostatic near the live terminal of rear end, therefore, unique electrostatic entrance is exactly assembling gap L13 between the first housing 1 and the second housing 2 and L14 place.As shown in figure 11, electrostatic reaches separately conductive devices place recently along a ~ f path, path distance, all more than 18mm, reaches the requirement that electrostatic defending grade is greater than 15kV.
The ammeter of the first embodiment is arranged on when installing on screen 9 to be fixed with both sides erecting frame, as shown in figure 12, inserts in the socket of internal circuit board during wiring with connection plug.Acting force during connection plug insertion socket acts on internal circuit board, display module 4 and the first housing 1 successively, finally acts on the erecting frame of both sides.Because panel 11 to the first housing 1 open rearward end is an entirety, when patching operations is exerted oneself excessive, also there will not be situation about occurring as traditional electrical surface plate comes off.And, panel 11 to the first housing 1 open rearward end is that this feature overall makes without the need to designing syndeton between ammeter face frame and housing, and structure at utmost simplifies, under the prerequisite ensureing sufficient intensity, face frame thickness can design very little, greatly saves and installs the positive space of planes of screen.
The second embodiment of the present invention on the basis of the first embodiment, does some improve, and increases rear-end protection device, make ammeter can be used in harsher, have in the environment of requirements at the higher level ammeter integral protection.
The second embodiment on the basis of the first embodiment, installs the rear-end protection devices such as terminal box 12, front O-ring seal 10, rear O-ring seal 11, trip bolt, water-proof wire cover 35, gland bonnet 33 and O-ring seal 34, to reach higher requirement of shelter.As shown in Figure 13, Figure 14, Figure 18, install terminal box 12 in the ammeter rear end of the first embodiment, terminal box 12 rear end outer wall is provided with string holes 121, inserts in the socket on internal circuit board from string holes 121 after being passed by connection plug again.In terminal box 12, the wire of connection connection plug leads to terminal box 12 rear through water-proof wire cover 35 after collecting, and is protected these wires by water-proof wire cover 35.In addition, in order to more protection, also gland bonnet 33 and O-ring seal 34 is provided with at string holes 121 place.Now, charged connection plug and wire can obtain great protection.In order to strengthen waterproof and dustproof and the antistatic performance of ammeter further, as shown in figure 16, front O-ring seal 10 is installed in aforesaid first container cavity; As shown in Figure 18, Figure 19, be also provided with groove 31 in terminal box 12 front end, and rear O-ring seal 11 be arranged in the second container cavity of jointly being formed by the rearward recess 23 of rear back-up ring 25 outer wall of groove 31, second housing 2 and the second housing 2.The rear back-up ring 25 of the second housing 2 plays positioning action when assembling with terminal box 12, plays the effect increasing electrostatic defending creepage distance after having assembled.Terminal box 12 is also provided with the box through hole that run through suitable with the second housing 2 shell through hole, is the first box through hole 32a, the second box through hole 32b, the 3rd box through hole 32c and the 4th box through hole 32d respectively.Adopting four trip bolts, is the first trip bolt 13a, the second trip bolt 13b, the 3rd trip bolt 13c and the 4th trip bolt 13d respectively, is inserted in box through hole, shell through hole and embedded screw hole by these four trip bolts also fixing respectively in turn.
Because the second embodiment is on the basis of the first embodiment, realized by introducing rear-end protection device, therefore, the installation step of the second embodiment and the first embodiment same section just repeats no more, and only introduces the installation step of the rear-end protection device of the second embodiment herein.As shown in Figure 15, Figure 17, the rear-end protection device of the second embodiment assembles according to following step:
(1) front O-ring seal 10 is arranged in forward recess 22, again that the second housing 2 is also fixing together with the first housing 1 abutting joint, as shown in figure 15, like this before O-ring seal 10 be just in the first container cavity of jointly being formed by the first groove 19, front back-up ring 21 outer wall and forward recess 22;
(2) rear O-ring seal 11 is arranged in rearward recess 23;
(3) three row's connection plugs overlaps 35 from the water-proof wire be connected with terminal box 12 pass, then stretch into the second housing 2 through the opening of second housing 2 other end respectively inner, and on the socket of insertion respective inner wiring board respectively;
(4) terminal box 12 of gland bonnet 33, O-ring seal 34 and water-proof wire cover 35 will be installed from the second housing 2 other end abutting joint, and fixed by four trip bolts, now, O-ring seal 11 is just in the second container cavity of jointly being formed by the rearward recess 23 of rear back-up ring 25 outer wall of groove 31, second housing 2 and the second housing 2.
The second embodiment, except panel 11 degree of protection reaches except IP68, due to the introducing of rear-end protection device, makes the degree of protection of ammeter entirety also can reach IP67.
The static discharge test of the second embodiment, as shown in figure 20, although there are eight places to beat electrostatic position, primary importance L21 respectively, second place L22, 3rd position L23, 4th position L24, 5th position L25, 6th position L26, 7th position L27 and 8 positions L28, but primary importance L21 and second place L22 is positioned on panel 11, electrostatic cannot enter in table to destroy device, and the 3rd position L23 and the 5th position L25 is positioned at the assembling gap place of the first housing 1 and the second housing 2, 4th position L24 and the 5th position L26 is positioned at the assembling gap place of the second housing 2 and terminal box 12, 7th position L27 and 8 positions L28 is positioned at string holes 121 place of terminal box 12 rear end, therefore, electrostatic entrance is the 3rd position L23, 4th position L24, 5th position L25, 6th position L26, 7th position L27 and 8 positions L28 place.As shown in figure 20, at the 3rd position L23, the 4th position L24, the 5th position L25 and the 6th L26 place, position, electrostatic reaches separately conductive devices place recently along a ~ f path, path distance, more than 18mm, reaches electrostatic defending 15kV requirement; At the 7th position L27 and 8 positions L28 place, electrostatic reaches separately Wiring port place recently along g ~ l path, path distance, all more than 18mm, also reaches electrostatic defending 15kV requirement.Therefore, the electrostatic defending grade of the ammeter entirety of the second embodiment is greater than 15kV.
The ammeter of the second embodiment is arranged on when installing on screen 9 to be fixed with both sides erecting frame, as shown in figure 21.The plug charged due to terminal box 12 pairs of rear ends and wire have carried out isolating and protecting, and therefore ammeter entirety is safe, and user can not touch dangerous charged rear end.
Although above specification describes particular implementation of the present invention, aspect and application, but be interpreted as, the invention is not restricted to precise structure disclosed in the present application and part composition, various obvious amendment, change and change, only otherwise depart from the spirit and scope of the present invention defined in the appended claims, all should in right.
Claims (10)
1. a high-protection level ammeter, is characterized in that: comprise the first housing (1), display module (4), internal circuit board, the second housing (2) and connection plug; First housing (1) front end is provided with panel (11), the first housing (1) open rearward end; Display module (4) and internal circuit board are installed in the first housing (1), the display surface of display module (4) is towards panel (11) rear end, relative with display module (4) display surface connects wire attachment internal circuit board, and internal circuit board is provided with socket; One end of second housing (2) is arranged on the first housing (1) open rearward end place; Second housing (2) other end is also provided with opening, and connection plug is inserted in described socket by the second housing (2) opening.
2. high-protection level ammeter according to claim 1, it is characterized in that: left end and the right-hand member of described first housing (1) are respectively equipped with hasp, left end and the right-hand member of described second housing (2) are also respectively equipped with the draw-in groove suitable with described hasp.
3. high-protection level ammeter according to claim 1, is characterized in that: described first housing (1) rear end is provided with the first groove (19); Described second housing (2) one end is provided with front back-up ring (21), and front back-up ring (21) outside is provided with forward recess (22); After described second housing (2) and described first housing (1) are installed together, the first groove (19), front back-up ring (21) outer wall and forward recess (22) form the first container cavity jointly.
4. high-protection level ammeter according to claim 3, is characterized in that: be provided with front O-ring seal (10) in described first container cavity.
5. high-protection level ammeter according to any one of claim 1 to 4, it is characterized in that: the other end of described second housing (2) is also provided with terminal box (12), terminal box (12) is provided with the string holes (121) supplying the wire of connection plug connection to pass.
6. high-protection level ammeter according to claim 5, is characterized in that: described second housing (2) other end is provided with rear back-up ring (25), and rear back-up ring (25) outside is provided with rearward recess (23); Described terminal box (12) front end is provided with groove (31); After described terminal box (12) and described second housing (2) are installed together, groove (31), rear back-up ring (25) outer wall and rearward recess (23) form the second container cavity jointly.
7. high-protection level ammeter according to claim 6, is characterized in that: be provided with rear O-ring seal (11) in described second container cavity.
8. high-protection level ammeter according to claim 5, it is characterized in that: be provided with water-proof wire cover (35) at described string holes (121) place, the wire that described connection plug connects leads to described terminal box (12) rear through water-proof wire cover (35) after converging.
9. high-protection level ammeter according to claim 8, is characterized in that: described string holes (121) place is also provided with gland bonnet (33) and O-ring seal (34).
10. high-protection level ammeter according to claim 5, it is characterized in that: described first housing (1) rear end is provided with embedded screw hole, described second housing (2) is provided with the shell through hole that run through suitable with embedded screw hole, and described terminal box (12) is also provided with the box through hole that run through suitable with described shell through hole.
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| CN201410841084.1A CN104502654A (en) | 2014-12-30 | 2014-12-30 | High-protection level electric meter |
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| CN201410841084.1A CN104502654A (en) | 2014-12-30 | 2014-12-30 | High-protection level electric meter |
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| CN104502654A true CN104502654A (en) | 2015-04-08 |
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| CN201410841084.1A Pending CN104502654A (en) | 2014-12-30 | 2014-12-30 | High-protection level electric meter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107765050A (en) * | 2016-08-18 | 2018-03-06 | 宁波三星医疗电气股份有限公司 | A kind of guide rail electric energy meter structure |
| CN111048347A (en) * | 2019-11-29 | 2020-04-21 | 国网山东省电力公司无棣县供电公司 | Insulation protection device of isolating switch |
| CN118226101A (en) * | 2024-05-22 | 2024-06-21 | 深圳市科纳森电子有限公司 | Single-phase intelligent ammeter |
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| CN204374254U (en) * | 2014-12-30 | 2015-06-03 | 江苏斯菲尔电气股份有限公司 | A kind of high-protection level ammeter |
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| CN107765050A (en) * | 2016-08-18 | 2018-03-06 | 宁波三星医疗电气股份有限公司 | A kind of guide rail electric energy meter structure |
| CN107765050B (en) * | 2016-08-18 | 2023-07-28 | 宁波三星医疗电气股份有限公司 | Guide rail electric energy meter structure |
| CN111048347A (en) * | 2019-11-29 | 2020-04-21 | 国网山东省电力公司无棣县供电公司 | Insulation protection device of isolating switch |
| CN118226101A (en) * | 2024-05-22 | 2024-06-21 | 深圳市科纳森电子有限公司 | Single-phase intelligent ammeter |
| CN118226101B (en) * | 2024-05-22 | 2024-07-30 | 深圳市科纳森电子有限公司 | Single-phase intelligent ammeter |
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Application publication date: 20150408 |