CN209979715U - Control box capable of replacing electric energy meter in electrified mode - Google Patents
Control box capable of replacing electric energy meter in electrified mode Download PDFInfo
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Abstract
A control box capable of replacing an electric energy meter in an electrified way relates to the technical field of electric energy metering devices, and aims to solve the problems that the existing device is complex in plugging and unplugging connecting components and easy to cause danger to workers, the device comprises a control box body, wherein a J0 interface, a J1 interface and a J2 interface are arranged on the outer surface of the control box body, a control selection circuit is arranged in the control box body and comprises a selection switch S1100, relays from KM1-1 to KM1-10 and relays from KM2-1 to KM2-10, and the selection switch S1100 is a single-pole three-throw switch; the device is used for overhauling and replacing the electric energy meter by a user with large electric energy consumption, such as a special distribution room, low-voltage power electricity and the like.
Description
Technical Field
The utility model relates to an electric energy metering device technical field especially relates to device is changed to electric energy meter.
Background
The current equipment of changing the electric energy meter is like the utility model patent of publication number CN202794265U, name "electric energy meter terminal box" that 2013.03.13 published, through the mechanical position control measurement electric energy meter's of each binding post connection piece in the adjustment box voltage break-make and whether the short circuit of electric current, this kind of "terminal box" has following shortcoming:
1. the new wiring difficulty is high, and the initially installed electric energy metering box needs to repeatedly check the state of a connecting sheet of a wiring terminal box;
2. the process of adjusting the connecting sheet when the meter is changed on site is complex, the difficulty of site operation is high, and the time is long;
3. when the meter is changed on site, the 'wiring terminal box' can disconnect the voltage of the meter and short-circuit the current of the meter, which means that the electric energy meter can not measure the electric quantity in the time period of meter changing, thus causing the loss of the electric quantity;
as disclosed in the utility model with publication number CN204287231U and name "replacing electric energy collection device without power outage" published on day 2015.04.22, the patent only provides a device for maintaining the electric energy collection device in live state, while the lines of the electric energy meter are live, and if the electric energy meter is maintained, the maintenance personnel are also very dangerous; also like the invention patent of publication No. CN108445268A and name 'a three-phase electric energy meter uninterrupted replacing device' disclosed on 2018.08.24, the short connector is inserted into the multifunctional comprehensive wire connector, one end of the wire connection port converter is inserted into the three-phase electric energy meter, the other end of the wire connection port converter is connected with the multifunctional comprehensive connecting wire, and then the short connector is pulled out, the device provided by the patent has more interfaces and complex operation;
therefore, the existing device for replacing the electric energy meter in a live-line mode needs a plug connection assembly, is complex in operation steps, is easy to cause danger to workers, and causes large operation difficulty for field workers, namely the existing device cannot meet the use requirements of safety and simplicity in operation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses it needs plug coupling assembling to aim at solving to change the electric energy meter device among the current three-phase circuit, and operating procedure is complicated, produces danger to the staff easily, and the operation degree of difficulty that causes the site work personnel is big, and current device can't reach safety, easy operation's user demand promptly.
In order to solve the above problems, the technical solution of the present application is as follows:
the utility model provides a control box capable of replacing an electric energy meter with electricity, which comprises a control box body and a control selection circuit,
the side surface of the control box body is respectively provided with a J0 interface, a J1 interface and a J2 interface,
the J0 interface, the J1 interface and the J2 interface are all 10-bit connection interfaces,
the 10 signal output ends of the power circuit to be detected are respectively and electrically connected with the 10 signal input ends of the J0 interface,
the 10 signal output ends of the J0 interface are respectively in one-to-one correspondence with the 10 signal input ends of the J1 interface and the 10 signal input ends of the J2 interface and are electrically connected with each other,
the 10 signal output ends of the J1 interface correspond to the 10 signal input ends of the No. 1 electric energy meter 200 for measuring electric energy one by one and are electrically connected with each other,
the 10 signal output ends of the J2 interface correspond to the 10 signal input ends of the No. 2 electric energy meter 300 for measuring electric energy one by one and are mutually and electrically connected,
the control selection circuit is positioned in the control box body,
the control selection circuit comprises a selection switch S1100, a KM1-1 to KM1-10 relay and a KM2-1 to KM2-10 relay,
one end of each of 10 normally open switches of the KM1-1 to KM1-10 relays is respectively connected with the signal output end of 10J 1 interfaces in a one-to-one correspondence manner, the other end of each of the 10 normally open switches is respectively connected with the corresponding signal input end of the No. 1 electric energy meter 200,
one end of each of 10 normally open switches of the KM2-1 to KM2-10 relays is respectively connected with the signal output end of 10J 2 interfaces in a one-to-one correspondence manner, the other end of each of the 10 normally open switches is respectively connected with the corresponding signal input end of the No. 2 electric energy meter 300,
the selection switch S1100 is a single pole three throw switch,
the moving contact of the selector switch S1100 is connected to the signal output of the J0 interface,
the A stationary contact of the selector switch S1100 is connected with the signal input end of the relays KM1-1 to KM1-10,
the B static contact of the selector switch S1100 is communicated with the signal input ends of the KM1-1 to KM1-10 relays and the KM2-1 to KM2-10 relays,
the stationary contact C of the selector switch S1100 is connected with the signal input end of the relays KM2-1 to KM2-10,
the adjusting knob of the selection switch S1100 is positioned on the outer surface of the control box body.
The utility model discloses device contrast prior art has following beneficial effect:
1. the wiring is simple, the adjustment is quick, no matter a meter is newly installed or replaced, the corresponding electric energy meter can be accessed only by the action of one rotary switch, and workers do not need to directly contact with the electrified equipment;
2. the field maintenance is simple and quick, the device is a modularized device, and the device can be directly replaced when damaged; fine adjustment on site is not needed;
3. the reliability of the equipment is high, the electric gating part is a meter, and a normally closed contact is used for not attracting the relay when the relay normally runs;
4. the universality is strong, different configurations can be selected according to actual conditions on site, and 220V alternating current or 12V direct current power supply is realized;
5. the power consumption is low, and the relay does not attract and uses a normally closed contact in normal operation and only has standby power consumption of a power supply.
Drawings
FIG. 1 is an electrical schematic diagram of a control box capable of replacing an electric energy meter in an electrified manner;
FIG. 2 is a schematic diagram showing the positional relationship of the components on the outer surface of a control box of an electrically replaceable electric energy meter;
FIG. 3 is a schematic diagram of electrical connections of peripheral devices;
FIG. 4 is a schematic electrical diagram of the control selection circuit when connected to a power source;
fig. 5 is an electrical schematic diagram of the selection switch S1 for controlling the selection circuit and the power circuit to be detected when it is placed at the stationary contact B;
fig. 6 is an electrical schematic diagram of the control selection circuit and the power supply added operation indicator lamp L1 and the operation indicator lamp L2.
In the figure: 100. a selector switch S1; no. 200.1 electric energy meter; no. 300.2 electric energy meter; 400. an operation indicator lamp L1; 500. and an operation indicator lamp L2.
Detailed Description
It should be appreciated that although an exemplary implementation of one or more embodiments of the invention is described in detail below, the disclosed compositions may be implemented using any other suitable technology, whether currently known or not yet existing. Therefore, the present invention should in no way be limited to the exemplary embodiments described below, but may be modified as appropriate within the scope of the appended claims and their equivalents. The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.
First embodiment this embodiment will be described below with reference to figures 1-6,
the utility model provides a control box capable of replacing an electric energy meter with electricity, which comprises a control box body and a control selection circuit,
the side surface of the control box body is respectively provided with a J0 interface, a J1 interface and a J2 interface,
the J0 interface, the J1 interface and the J2 interface are all 10-bit connection interfaces,
the 10 signal output ends of the power circuit to be detected are respectively and electrically connected with the 10 signal input ends of the J0 interface,
the 10 signal output ends of the J0 interface are respectively in one-to-one correspondence with the 10 signal input ends of the J1 interface and the 10 signal input ends of the J2 interface and are electrically connected with each other,
the 10 signal output ends of the J1 interface correspond to the 10 signal input ends of the No. 1 electric energy meter 200 for measuring the electric energy from the outside one by one and are electrically connected with each other,
the 10 signal output ends of the J2 interface correspond to the 10 signal input ends of the No. 2 electric energy meter 300 for measuring the electric energy from the outside one by one and are electrically connected with each other,
the control selection circuit is positioned in the control box body,
the control selection circuit comprises a selection switch S1100, a KM1-1 to KM1-10 relay and a KM2-1 to KM2-10 relay,
one end of each of 10 normally open switches of the KM1-1 to KM1-10 relays is respectively connected with the signal output end of 10J 1 interfaces in a one-to-one correspondence manner, the other end of each of the 10 normally open switches is respectively connected with the corresponding signal input end of the No. 1 electric energy meter 200,
one end of each of 10 normally open switches of the KM2-1 to KM2-10 relays is respectively connected with the signal output end of 10J 2 interfaces in a one-to-one correspondence manner, the other end of each of the 10 normally open switches is respectively connected with the corresponding signal input end of the No. 2 electric energy meter 300,
the selection switch S1100 is a single pole three throw switch,
the moving contact of the selector switch S1100 is connected to the signal output of the J0 interface,
the A stationary contact of the selector switch S1100 is connected with the signal input end of the relays KM1-1 to KM1-10,
the B static contact of the selector switch S1100 is communicated with the signal input ends of the KM1-1 to KM1-10 relays and the KM2-1 to KM2-10 relays,
the stationary contact C of the selector switch S1100 is connected with the signal input end of the relays KM2-1 to KM2-10,
an adjusting knob of the selection switch S1100 is positioned on the outer surface of the control box body;
the B stationary contact of the selection switch S1100 is connected with the signal input end of the KM1-1 to KM1-10 relay through a switch diode D1 placed in the forward direction,
meanwhile, the signal input end of the relay from KM2-1 to KM2-10 is connected with a forward-placed switch diode D2;
the selector switch S1100 is a three-position selector switch of type XB2-BD 25.
The switching diode D1 and the switching diode D2 may both be diodes of type 1N 4148;
the switch diode D1 has the advantages that the current is conducted in one direction, the current can only flow in the forward direction, and is cut off in the reverse direction, as can be seen from fig. 4, 5 or 6, the connection mode can effectively prevent the current from flowing back, and effectively ensures the effectiveness of the selector switch S1, if the connection mode of the switch diode D1 and the two signal output ends of the stationary contact of the selector switch S1100B is the connection mode, the circuit can be ensured to be used well, and the device is simple and easy to connect, so that the three-phase selector switch can be realized by a simple circuit, the cost is greatly reduced, and the manufacturing difficulty is also reduced;
selector switch S1100 is configured as a three-position selector switch of type XB2-BD 25;
the three-position selector switch of the XB2-BD25 is a three-position selector switch in the prior art, which is a one-closed two-open switch, and some three-position selector switches have a reset function, which is not required by people, so that the three-position selector switch with the reset function is not required to be selected, and the switch of the type is selected to realize the function;
also comprises a work indicator light L1400 and a work indicator light L2500,
the working indicator light L1400 is connected in series with a path between a normally open switch of the KM1-1 to KM1-10 relays and a signal end of the No. 1 electric energy meter 200,
the working indicator light L2500 is connected in series with a path between a normally open switch of the KM2-1 to KM2-10 relays and a signal end of the No. 2 electric energy meter 300;
the No. 1 electric energy meter 200 and the No. 2 electric energy meter 300 function as an electric energy metering tool for measuring a circuit to be tested,
as shown in fig. 2, the J0 interface is a J0 terminal block, wherein,
j0-1, namely K1 with interface 1 connected with the phase current transformer of A, J0-2, namely interface 2 connected with the phase voltage of A, J0-3, namely interface 3 connected with K2 of the phase current transformer of A, J0-4, namely interface 4 connected with K1 of the phase current transformer of B, J0-5, namely interface 5 connected with the phase voltage of B, J0-6, namely interface 6 connected with K2 of the phase current transformer of B, J0-7, namely interface 7 connected with K1 of the phase current transformer of C, J0-8, namely interface 8 connected with the phase voltage of C, J0-9, namely interface 9 connected with K2 of the phase current transformer of C, J0-10, namely interface 10 connected with zero line of N;
the J1 interface is a J1 terminal block, wherein,
no. 1 to No. 10 interfaces of the J1 are respectively connected with No. 1 to No. 10 wiring holes corresponding to the No. 1 electric energy meter 200,
the J1 interface is a J2 terminal block, wherein,
no. 1 to No. 10 interfaces of the J2 are respectively connected with No. 1 to No. 10 wiring holes corresponding to the No. 2 electric energy meter 300,
the control box body is also internally provided with interfaces V + and V-, which are used for respectively connecting the V + and V-of an external switching power supply to corresponding interfaces if devices such as switches, relays and the like in the control box are 24V-driven power supplies;
interfaces L and N for power supply access are also arranged in the control box body, and if devices such as switches and relays in the control box are power supply sources driven by 220V alternating current, the L and the N are correspondingly accessed;
FIG. 3 is a schematic diagram of the electrical connections of the peripheral devices;
the device is used by users with large power consumption, such as a special distribution room, low-voltage power electricity and the like, and the loss of electric quantity caused by the replacement of the electric energy meter on site can be effectively prevented by using the device;
the working principle is as follows:
the external wiring of the device is three groups of 'three-phase four-wire' wiring terminals which are respectively a J0 interface 'voltage current inlet', a J1 interface 'No. 1 epitope interface' and a J2 interface 'No. 2 epitope interface', the voltage current inlet is connected with a circuit of electric energy to be detected, the No. 1 epitope interface is connected with the No. 1 electric energy meter 200, the No. 2 epitope interface is connected with the No. 2 electric energy meter 300,
the shell is provided with a gating switch of a selection switch S1100, namely an adjusting knob:
the selector switch S1100 rotates leftwards, when the selector switch S1100 rotates to the stationary contact A, the selection end of the selector switch S1100 is connected with the signal input end of the stationary contact A, the signal output end of the stationary contact A is conducted with a circuit of three-phase four-wire electric energy to be detected, S1-A is closed, a J1 interface, namely a J1 terminal row is communicated with a J0 interface, namely a J0 terminal row in a one-to-one correspondence manner, that is, the "voltage current inlet" is connected with the "No. 1 epitope interface", the No. 1 electric energy meter 200 connected with the No. 1 epitope normally operates, the group of KM1 connected with the No. 1 electric energy meter 200 has 10 relays, that is, coils of KM1-1 to KM1-10 relays, energized, so that 10 normally closed points of the relays are disconnected, the J2 interface, that is, the J2 terminal row is not communicated with the J0 terminal row, the No. 2 electric energy meter 300 connected with the "No. 2 epitope interface" is powered off, the on-site operation can be carried out, and the work of overhauling, replacing or dismantling and resetting the No. 2 electric energy meter 300 is realized;
the selector switch S1100 rotates rightwards, when the selector switch S1100 rotates to the C stationary contact, the signal output end of the selector switch S1100 is connected with the signal input end of the C stationary contact, the signal output end of the C stationary contact is conducted with a circuit of electric energy to be detected, S1-C is closed, a J2 interface, namely a J2 terminal row is communicated with a J0 interface, namely a J0 terminal row in a one-to-one correspondence mode, namely, a voltage current inlet is connected with a meter position interface No. 2, the meter position interface No. 2 connected with the meter position No. 2 is normally operated, the KM2 group connected with the meter position No. 2 is provided with 10 relays, namely, coils of KM2-1 to KM2-10 relays, which are connected with the meter position No. 2 300 are electrified, so that 10 normally closed points of the relays are disconnected, a J1 interface, namely a J1 terminal row is not communicated with a J0 terminal row, the meter position interface No. 1 connected with the meter position interface No. 1 is powered off, the on-site operation can be carried out, and the work of overhauling, replacing or dismantling and resetting the No. 1 electric energy meter 300 is realized;
when the selector switch S1100 is in the middle position and the B stationary contact is positioned, the signal output end of the selector switch S1100 is connected with the signal input end of the B stationary contact, the signal output end of the B stationary contact is conducted with a circuit of the electric energy to be detected, S1-B is closed, a J1 interface, namely a J1 terminal row, is communicated with a J0 interface, namely a J0 terminal row, in a one-to-one correspondence manner, namely, a voltage current inlet is communicated with a 1 epitope interface, the No. 1 electric energy meter 200 connected with the No. 1 electric energy meter 200 normally operates, KM1 groups connected with the No. 1 electric energy meter 200 are respectively provided with 10 relays, namely, coils of KM1-1 to KM1-10 relays are electrified, so that 10 normally closed relays are disconnected and normally opened, the J2 interface, namely, a J2 terminal row is communicated with a J0 interface, namely, a J0 terminal row, namely, the voltage current inlet is communicated with a 2 meter position interface, and the No., the KM2 group connected with the No. 2 electric energy meter 300 has 10 relays, namely, the coil of the KM2-1 to KM2-10 relays is electrified, so that a normally closed point of the 10 relays is disconnected and a normally opened point is closed, so that the No. 1 electric energy meter 200 and the No. 2 electric energy meter 300 are normally operated, a voltage current inlet, a No. 1 epitope interface and a No. 2 epitope interface are simultaneously electrified, the electric energy meter can normally operate no matter which epitope the electric energy meter is positioned, at the moment, the electric energy meter is in a normal operation state, and the No. 1 epitope and the No. 2 epitope can not be subjected to other operations such as meter replacement and the like so;
the control mode stops the possibility of simultaneous power failure of the J1 interface and the J2 interface on the basis of an electrical principle, thereby avoiding the condition of electric energy loss caused by replacement of an electric energy meter, and simultaneously, rotary switches and relays of different models can be respectively selected according to the types of power supplies on site.
The second specific embodiment, the working indicator light L1400 and the working indicator light L2500 which are different from the first specific embodiment are different in connection mode, the connection state and the working principle of the rest elements are the same as those of the first specific embodiment, the indicator light is added to facilitate working, accidents caused by mistaken touch of a live end are avoided, and the practicability of the device is enhanced;
the working indicator light L1400 is connected in series with the paths of the A static contact and the B static contact of the selector switch S1100 and the signal input ends of the KM1-1 to KM1-10 relays,
the working indicator light L2500 is connected in series with a path between the C stationary contact and the B stationary contact of the selector switch S1100 and the signal input end of the KM 2-1-KM 2-10 relay;
therefore, the electric energy meter can be monitored totally, as long as the KM1-1 to KM1-10 relays have one circuit to turn on the working indicator lamp L1400, and as long as the KM2-1 to KM2-10 relays have one circuit to turn on the working indicator lamp L2500, the influence of the damage of the relays is small;
this embodiment only shows a possibility of connecting the operation indicator lamp L1400 and the operation indicator lamp L2500 in the specific implementation process.
The third embodiment is different from the first embodiment and the second embodiment in that the two work indication lamps are different in connection position,
the working indicator light L1400 is connected in series with the normally open switch of any relay from KM1-1 to KM1-10 and then connected in parallel with the normally open switches of other relays,
the working indicator light L2500 is connected in series with the normally open switch of any relay from KM2-1 to KM2-10 and then connected in parallel with the normally open switches of other relays;
the embodiment only gives a possibility that the work indicator light L1400 and the work indicator light L2500 are connected in the specific implementation process;
the connection mode not only can realize the functions of identifying and indicating the working state of the electric energy meter,
when the plurality of operation indicating lamps L1400 and the plurality of operation indicating lamps L2500 are provided,
also can all establish ties every relay with a work pilot lamp, then wholly parallelly connected, whether can judge through the bright of work pilot lamp whether have the relay to damage like this, the equipment of being convenient for detects.
Claims (6)
1. The utility model provides a can change control box of electric energy meter with electricity, includes the control box body, its characterized in that: also comprises a control selection circuit which is used for controlling the selection circuit,
the side surface of the control box body is respectively provided with a J0 interface, a J1 interface and a J2 interface,
the J0 interface, the J1 interface and the J2 interface are all 10-bit connection interfaces,
the 10 signal output ends of the power circuit to be detected are respectively and electrically connected with the 10 signal input ends of the J0 interface,
the 10 signal output ends of the J0 interface are respectively in one-to-one correspondence with the 10 signal input ends of the J1 interface and the 10 signal input ends of the J2 interface and are electrically connected with each other,
the 10 signal output ends of the J1 interface are in one-to-one correspondence with the 10 signal input ends of the No. 1 electric energy meter (200) and are electrically connected with each other,
the 10 signal output ends of the J2 interface are in one-to-one correspondence with the 10 signal input ends of the No. 2 electric energy meter (300) and are electrically connected with each other,
the control selection circuit is positioned in the control box body,
the control selection circuit comprises a selection switch S1(100), a KM1-1 to KM1-10 relay and a KM2-1 to KM2-10 relay,
one end of each of 10 normally open switches of the KM1-1 to KM1-10 relays is respectively connected with the signal output end of each of 10J 1 interfaces in a one-to-one correspondence manner, the other end of each of the 10 normally open switches is respectively connected with the corresponding signal input end of the No. 1 electric energy meter (200),
one end of each of 10 normally open switches of the KM2-1 to KM2-10 relays is respectively connected with the signal output end of 10J 2 interfaces in a one-to-one correspondence manner, the other end of each of the 10 normally open switches is respectively connected with the corresponding signal input end of the No. 2 electric energy meter (300),
the selection switch S1(100) is a single pole, triple throw switch,
the movable contact of the selection switch S1(100) is connected with the signal output end of the J0 interface,
the A static contact of the selection switch S1(100) is connected with the signal input end of the KM1-1 to KM1-10 relay,
the B static contact of the selector switch S1(100) is communicated with the signal input ends of the KM1-1 to KM1-10 relay and the KM2-1 to KM2-10 relay,
the stationary contact C of the selector switch S1(100) is connected with the signal input end of the KM2-1 to KM2-10 relay,
the adjusting knob of the selector switch S1(100) is located on the outer surface of the control box body.
2. The control box of the electric energy meter capable of being replaced with electricity according to claim 1, characterized in that: the B stationary contact of the selection switch S1(100) is connected with the signal input end of the KM1-1 to KM1-10 relays through a switch diode D1 which is arranged in the forward direction,
and is also connected with the signal input ends of the KM2-1 to KM2-10 relays through a forward-placed switching diode D2.
3. The control box of the electric energy meter capable of being replaced with electricity according to claim 1, characterized in that: the selector switch S1(100) is a three-position selector switch of type XB2-BD 25.
4. The control box of the electric energy meter capable of being charged and replaced according to the claim 1, 2 or 3, characterized in that: also comprises a work indicator light L1(400) and a work indicator light L2(500),
the working indicator lamp L1(400) is connected in series on a path between a normally open switch of the KM1-1 to KM1-10 relay and a signal end of the No. 1 electric energy meter (200),
the working indicator lamp L2(500) is connected in series with a path between a normally open switch of the KM2-1 to KM2-10 relay and a signal end of the No. 2 electric energy meter (300).
5. The control box of the electric energy meter capable of being charged and replaced according to the claim 1, 2 or 3, characterized in that: also comprises a work indicator light L1(400) and a work indicator light L2(500),
the working indicator lamp L1(400) is connected in series on the paths of the A static contact and the B static contact of the selector switch S1(100) and the signal input ends of the KM1-1 to KM1-10 relays,
the working indicator lamp L2(500) is connected in series on the paths of the C stationary contact and the B stationary contact of the selector switch S1(100) and the signal input ends of the KM2-1 to KM2-10 relays.
6. The control box of the electric energy meter capable of being charged and replaced according to the claim 1, 2 or 3, characterized in that: also comprises a work indicator light L1(400) and a work indicator light L2(500),
the working indicator lamp L1(400) is connected in series with the normally open switch of any relay from KM1-1 to KM1-10 and then connected in parallel with the normally open switches of other relays,
the working indicator lamp L2(500) is connected in series with the normally open switch of any relay from KM2-1 to KM2-10 and then connected in parallel with the normally open switches of other relays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759215.XU CN209979715U (en) | 2019-05-24 | 2019-05-24 | Control box capable of replacing electric energy meter in electrified mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759215.XU CN209979715U (en) | 2019-05-24 | 2019-05-24 | Control box capable of replacing electric energy meter in electrified mode |
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| Publication Number | Publication Date |
|---|---|
| CN209979715U true CN209979715U (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920759215.XU Active CN209979715U (en) | 2019-05-24 | 2019-05-24 | Control box capable of replacing electric energy meter in electrified mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209979715U (en) |
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2019
- 2019-05-24 CN CN201920759215.XU patent/CN209979715U/en active Active
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