CN110221106A - Secondary combined wiring device of electric energy metering device - Google Patents
Secondary combined wiring device of electric energy metering device Download PDFInfo
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Abstract
本发明提供了一种电能计量装置二次联合接线装置，安装在计量柜内，计量柜内安装有电能表和负控终端，联合接线盒包括电能表接线盒和负控终端接线盒，所述电能表接线盒设有电压接线端子组一、电流接线端子组一以及RS485接线一，所述电压接线端子组一和电流接线端子组一分别插入电压接线孔组一和电流接线孔组一并采用固定螺钉固定，所述RS485接线一与RS485接线端子一连接；所述负控终端接线盒设有电压接线端子组二、电流接线端子组二以及RS485接线二，所述电压接线端子组二和电流接线端子组二分别插入电压接线孔组二和电流接线孔组二并采用固定螺钉固定，所述RS485接线二与RS485接线端子二连接。本发明简少了接线量，提高了工作准确性和效率。
The invention provides a secondary joint connection device of an electric energy metering device, which is installed in a metering cabinet. An electric energy meter and a negative control terminal are installed in the metering cabinet. The joint junction box includes a electric energy meter junction box and a negative control terminal junction box. The electric energy meter junction box is provided with a voltage terminal group 1, a current terminal group 1 and an RS485 connection terminal 1, and the voltage terminal group 1 and the current terminal group 1 are respectively inserted into the voltage terminal hole group 1 and the current terminal hole group together. The fixing screw is fixed, the RS485 connection one is connected with the RS485 connection terminal one; the negative control terminal junction box is provided with voltage connection terminal group two, current connection terminal group two and RS485 connection two, the voltage connection terminal group two and current connection terminal group two The second wiring terminal group is respectively inserted into the second voltage wiring hole group and the second current wiring hole group and fixed with fixing screws, and the second RS485 wiring terminal is connected with the second RS485 wiring terminal. The invention simplifies and reduces the amount of wiring, and improves work accuracy and efficiency.
Description
技术领域technical field
本发明涉及一种接线盒，尤其涉及电能计量装置二次联合接线装置。The invention relates to a junction box, in particular to a secondary joint connection device of an electric energy metering device.
背景技术Background technique
目前在进行电网自动化改造以及安装二次计量设备时，需要从电压/电流互感器那里进行电压/电流信号的采集，常用的二次计量设备包括多功能电能表、配变采集终端、负控采集终端等。每次在计量柜安装现场，先要将采集终端、电能表、联合接线排固定到计量柜内的相应位置，然后根据它们之间的距离、电能表量程、计量柜布线规范等因素，裁剪三十多根长短粗细不一的导线，按相应的电气规则将它们连接起来，经过长期的工作实践，发现这样的工作过程存在有以下不足之处：At present, when performing grid automation transformation and installing secondary metering equipment, it is necessary to collect voltage/current signals from voltage/current transformers. Commonly used secondary metering equipment includes multi-function electric energy meters, distribution transformer acquisition terminals, negative control acquisition terminal etc. Every time at the installation site of the metering cabinet, the acquisition terminal, electric energy meter, and joint terminal block must be fixed to the corresponding positions in the metering cabinet, and then cut out three More than ten wires of different lengths and thicknesses are connected according to the corresponding electrical rules. After long-term work practice, it is found that such a work process has the following shortcomings:
1、工作人员在前往安装现场时，要事先要准备数种不同规格的电缆，且电缆的长度不能确定，如果预先截取，可能造成浪费，如果整卷携带，则会增加工作人员的劳动强度。1. When the staff goes to the installation site, they must prepare several cables of different specifications in advance, and the length of the cables cannot be determined. If they are cut in advance, it may cause waste. If they are carried in whole rolls, the labor intensity of the staff will be increased.
2、工作人员在狭小的计量柜里进行现场布线，操做繁琐。2. The staff carry out on-site wiring in the narrow metering cabinet, which is cumbersome to operate.
3、由于导线很多，连接关系复杂，工作人员在现场接线时容易出错。3. Because there are many wires and the connection relationship is complicated, it is easy for the staff to make mistakes when wiring on site.
4、工作人员每次在现场工作，其中裁线、剥线头、接线则需要花费大量的时间，工作效率较低。4. It takes a lot of time for the staff to work on site every time, cutting wires, stripping wire ends, and wiring, and the work efficiency is low.
发明内容Contents of the invention
本发明的目的在于提供一种接线效率高的用于电能计量装置二次回路的联合接线装置。The purpose of the present invention is to provide a combined wiring device for the secondary circuit of an electric energy metering device with high wiring efficiency.
为了达到上述目的，本发明采用如下技术方案：In order to achieve the above object, the present invention adopts following technical scheme:
电能计量装置二次联合接线装置，安装在计量柜内，计量柜内安装有电能表和负控终端，所述电能表具有端子座一以及RS485接线端子一，所述端子座一设有电压接线孔组一和电流接线孔组一，所述负控终端具有端子座二以及RS485接线端子二，所述端子座二设有电压接线孔组二和电流接线孔组二，所述联合接线盒包括电能表接线盒和负控终端接线盒，所述电能表接线盒和负控终端接线盒通过电缆组一连接，所述电能表接线盒设有电压接线端子组一、电流接线端子组一以及RS485接线一，所述电压接线端子组一和电流接线端子组一分别对应插入电压接线孔组一和电流接线孔组一并采用固定螺钉固定，所述RS485接线一与RS485接线端子一连接；所述负控终端接线盒设有电压接线端子组二、电流接线端子组二以及RS485接线二，所述电压接线端子组二和电流接线端子组二分别对应插入电压接线孔组二和电流接线孔组二并采用固定螺钉固定，所述RS485接线二与RS485接线端子二连接。The secondary combined wiring device of the electric energy metering device is installed in the metering cabinet. The electric energy meter and the negative control terminal are installed in the metering cabinet. The electric energy meter has a terminal block 1 and a RS485 terminal block 1. Hole group 1 and current wiring hole group 1, the negative control terminal has terminal block 2 and RS485 terminal block 2, the terminal block 2 is provided with voltage wiring hole group 2 and current wiring hole group 2, and the joint junction box includes The electric energy meter junction box and the negative control terminal junction box, the electric energy meter junction box and the negative control terminal junction box are connected by a cable group one, and the electric energy meter junction box is provided with a voltage connection terminal group one, a current connection terminal group one and RS485 Wiring 1, the voltage wiring terminal group 1 and the current wiring terminal group 1 are respectively inserted into the voltage wiring hole group 1 and the current wiring hole group 1 and fixed with fixing screws, and the RS485 wiring 1 is connected to the RS485 wiring terminal 1; The negative control terminal junction box is provided with a voltage terminal group 2, a current terminal group 2 and an RS485 connection terminal 2, and the voltage terminal group 2 and the current terminal group 2 are respectively inserted into the voltage terminal group 2 and the current terminal group 2 respectively. It is fixed with fixing screws, and the RS485 terminal 2 is connected to the RS485 terminal 2.
进一步的，所述电能表接线盒和所述负控终端接线盒均包括盒体和盒盖，所述盒盖为透明盒盖。Further, both the electrical energy meter junction box and the negative control terminal junction box include a box body and a box cover, and the box cover is a transparent box cover.
进一步的，所述负控终端接线盒包括盒体、盒盖及电路板，负控终端接线盒的电路板固定设置在负控终端接线盒的盒体上，负控终端接线盒的电路板上设有门节点输出端子和开盖触点一，所述门节点输出端子和所述开盖触点一电连接，所述盒盖上设有与开盖触点一相对应的开盖触点二。Further, the negative control terminal junction box includes a box body, a box cover and a circuit board, the circuit board of the negative control terminal junction box is fixedly arranged on the box body of the negative control terminal junction box, and the circuit board of the negative control terminal junction box A door node output terminal and a cover opening contact 1 are provided, the door node output terminal is electrically connected to the cover opening contact 1, and the cover is provided with a cover opening contact corresponding to the cover opening contact 1 two.
进一步的，所述电能表接线盒和所述负控终端接线盒均包括盒体和盒盖，所述电能表接线盒和负控终端接线盒上分别设有电缆卡口，所述电缆卡口由所述盒体和所述盒盖拼合形成，所述电缆卡口凸出于所述电能表接线盒和负控终端接线盒的外表面。Further, the electric energy meter junction box and the negative control terminal junction box both include a box body and a box cover, and the electric energy meter junction box and the negative control terminal junction box are respectively provided with a cable bayonet, and the cable bayonet Formed by splicing the box body and the box cover, the cable bayonet protrudes from the outer surfaces of the electrical energy meter junction box and the negative control terminal junction box.
进一步的，所述电缆卡口的内表面设有用于卡设电缆的凸条，所述凸条的长度方向与电缆的长度方向垂直。Further, the inner surface of the cable bayonet is provided with a raised strip for clamping the cable, and the length direction of the raised strip is perpendicular to the length direction of the cable.
进一步的，所述负控终端接线盒上设有电压开路开关和电流短路开关。Further, the negative control terminal junction box is provided with a voltage open circuit switch and a current short circuit switch.
进一步的，所述负控终端接线盒上还设有三相钳形电流表电流采样端口。Further, the negative control terminal junction box is also provided with a three-phase clamp ammeter current sampling port.
进一步的，所述负控终端接线盒的互感器接线端连接电缆组二，所述电缆组二与互感器端的对应端子连接。Further, the transformer terminal of the negative control terminal junction box is connected to the second cable group, and the second cable group is connected to the corresponding terminal of the transformer end.
采用上述技术方案后，本发明具有如下优点：After adopting the technical scheme, the present invention has the following advantages:
1、接线安装时，仅需将电能表和电能表接线盒上的接线端子、负控终端和负控终端接线盒上的接线端子对应连接即可，由于联合接线盒已完成了电能表和负控终端之间中间接线部分，确保了接线的正确性，增加了美观度，简少了接线量，提高了工作准确性和效率。1. When wiring and installing, it is only necessary to connect the connection terminals on the electric energy meter and the electric energy meter junction box, the negative control terminal and the terminal on the negative control terminal junction box correspondingly. The intermediate wiring part between the control terminals ensures the correctness of the wiring, increases the aesthetics, reduces the amount of wiring, and improves the accuracy and efficiency of work.
2、通过透明盒盖可清晰地观察到接线盒内接线状况。2. The wiring status in the junction box can be clearly observed through the transparent box cover.
3、若盒盖在使用过程中被打开，则开盖触点一和开盖触点二之间断开，开盖信号会通过门节点输出端子传送到主站管理系统，起到开盖探测的作用。3. If the box cover is opened during use, the cover opening contact 1 and the cover opening contact 2 will be disconnected, and the cover opening signal will be transmitted to the master station management system through the output terminal of the door node, which plays a role of cover opening detection. effect.
4、盒体和盒盖安装完毕后，电缆卡口将电缆卡紧在电缆卡口内，电缆固定稳固不易松动。4. After the box body and the box cover are installed, the cable bayonet clamps the cable in the cable bayonet, and the cable is fixed firmly and not easy to loosen.
5、电缆卡口内的凸条起到电缆轴向固定的作用，防止电缆滑移。5. The convex strip in the cable bayonet plays the role of axially fixing the cable and preventing the cable from slipping.
6、负控终端接线盒上设有电压开路开关和电流短路开关，断开电压开路开关和电流短接开关就可以在不断电的情况下，更换或检修负控采集终端或电能表。6. The junction box of the negative control terminal is equipped with a voltage open circuit switch and a current short circuit switch. By disconnecting the voltage open circuit switch and the current short circuit switch, the negative control collection terminal or the electric energy meter can be replaced or repaired without power interruption.
7、联合接线盒上设有数据采集模块，数据采集模块用于电表读数采集，数据采集模块和抄表主站之间通过RS485通信。7. There is a data acquisition module on the joint junction box. The data acquisition module is used to collect the readings of the electric meter. The communication between the data acquisition module and the meter reading master station is through RS485.
8、负控终端接线盒上设有三相钳形电流表电流采样端口，配置了A相、B相、C相钳表卡位置，方便进行电能表现场校验。8. The negative control terminal junction box is equipped with a three-phase clamp ammeter current sampling port, and is equipped with A phase, B phase, and C phase clamp meter card positions, which is convenient for on-site verification of the electric energy meter.
9、联盒接线盒至互感器接线，电缆组二与互感器端的对应端子连接，保证了接线正确。9. Connect the connection box from the junction box to the transformer, and connect the cable group 2 with the corresponding terminal on the transformer end to ensure correct wiring.
附图说明Description of drawings
下面结合附图对本发明作进一步说明：The present invention will be further described below in conjunction with accompanying drawing:
图1为本发明提供的用于电能计量装置二次回路的联合接线盒的结构示意图。Fig. 1 is a structural schematic diagram of a joint junction box used in the secondary circuit of an electric energy metering device provided by the present invention.
图2为负控终端接线盒与互感器的接线电路图。Figure 2 is a wiring circuit diagram of the negative control terminal junction box and the transformer.
具体实施方式Detailed ways
以下结合附图及具体实施例，对本发明作进一步的详细说明。The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
电能计量装置二次联合接线装置，安装在计量柜内。The secondary joint wiring device of the electric energy metering device is installed in the metering cabinet.
计量柜内安装有电能表和负控终端，所述电能表具有端子座一以及RS485接线端子一，所述端子座一设有电压接线孔组一和电流接线孔组一，所述负控终端具有端子座二以及RS485接线端子二，所述端子座二设有电压接线孔组二和电流接线孔组二。An electric energy meter and a negative control terminal are installed in the metering cabinet. The electric energy meter has a terminal block 1 and an RS485 terminal block 1. The terminal block 1 is provided with a voltage wiring hole group 1 and a current wiring hole group 1. The negative control terminal It has a second terminal base and a second RS485 connection terminal, and the second terminal base is provided with a second voltage wiring hole group and a second current wiring hole group.
如图1和图2所示，所述联合接线盒包括电能表接线盒1和负控终端接线盒2，所述电能表接线盒1和负控终端接线盒2通过电缆组一3连接，所述电能表接线盒设有接线端子组一11以及RS485接线模块一12，其中，接线端子组一11包括电压接线端子组一(U1a、U1b、U1c、U1N)和电流接线端子组一( )，所述RS485接线模块一12连接RS485接线一。所述负控终端接线盒2设有接线端子组二21以及RS485接线模块二22，其中，接线端子组二21包括电压接线端子组二(U2a、U2b、U2c、U2N)、电流接线端子组二()，所述RS485接线模块二22连接RS485接线二。As shown in Figures 1 and 2, the combined junction box includes an electric energy meter junction box 1 and a negative control terminal junction box 2, and the electric energy meter junction box 1 and the negative control terminal junction box 2 are connected by a cable group one 3, so The electric energy meter junction box is provided with terminal group one 11 and RS485 connection module one 12, wherein the terminal group one 11 includes voltage terminal group one (U1 a , U1 b , U1 c , U1 N ) and current terminal group one one( ), the RS485 wiring module one 12 is connected to the RS485 wiring one. The negative control terminal junction box 2 is provided with a connection terminal group 2 21 and an RS485 connection module 2 22, wherein the connection terminal group 2 21 includes a voltage connection terminal group 2 (U2 a , U2 b , U2 c , U2 N ), current Terminal block two ( ), the RS485 connection module two 22 is connected to the RS485 connection two.
所述电压接线端子组一和电流接线端子组一分别插入电压接线孔组一和电流接线孔组一并采用固定螺钉固定，所述RS485接线一与RS485接线端子一连接；所述电压接线端子组二和电流接线端子组二分别插入电压接线孔组二和电流接线孔组二并采用固定螺钉固定，所述RS485接线二与RS485接线端子二连接。The voltage connection terminal group one and the current connection terminal group one are respectively inserted into the voltage connection hole group one and the current connection hole group and fixed with fixing screws, and the RS485 connection one is connected with the RS485 connection terminal one; the voltage connection terminal group The two and the current terminal group two are respectively inserted into the voltage connection hole group two and the current connection hole group two and fixed with fixing screws, and the RS485 connection two is connected with the RS485 connection terminal two.
配置了电能表接线装置电压/电流接线端子使用：在松开电能表端子座电压/电流端子固定螺钉后，拿掉电能表接线装置电压/电流接线端子保护套，将接线装置电能表接线模块电压/电流接线端子对准电能表端端子座相对应的接线孔推入，然后将电能表接线模块固定在计量柜内，拧紧电能表端端子座电压/电流端子固定螺钉，以完成电能表到接线盒的接线。The voltage/current terminal of the electric energy meter wiring device is configured to use: after loosening the voltage/current terminal fixing screw of the electric energy meter terminal base, take off the protective cover of the voltage/current terminal of the electric energy meter wiring device, and connect the voltage of the electric energy meter wiring module of the wiring device to Align the /current wiring terminal with the corresponding wiring hole of the terminal block of the electric energy meter and push it in, then fix the electric energy meter wiring module in the metering cabinet, and tighten the voltage/current terminal fixing screw of the terminal seat of the electric energy meter end to complete the electric energy meter to the wiring Box wiring.
配置了终端接线装置电压/电流接线端子：在松开终端端子座电压/电流端子固定螺钉后，拿掉终端接线装置电压/电流接线端子保护套，将电压/电流接线端子对准负控终端端端子座相对应的接线孔推入，然后将负控接线装置固定在计量柜内，拧紧终端端端子座电压/电流端子固定螺钉，以完成终端到接线盒的接线。The voltage/current terminal of the terminal wiring device is configured: after loosening the fixing screw of the voltage/current terminal of the terminal terminal seat, remove the protective cover of the voltage/current terminal of the terminal wiring device, and align the voltage/current terminal with the negative control terminal Push in the corresponding wiring hole of the terminal base, then fix the negative control wiring device in the metering cabinet, and tighten the voltage/current terminal fixing screws of the terminal terminal base to complete the wiring from the terminal to the junction box.
电能表、联合接线盒、终端三者接线模块。联合接线盒模块已完成了电能表、联合接线盒、终端三者之间中间接线部分，确保了接线的正确性，增加了美观度，简少了接线量，提高了工作准确性、效率。Electric energy meter, combined junction box and terminal three connection modules. The joint junction box module has completed the intermediate wiring part between the electric energy meter, the joint junction box and the terminal, which ensures the correctness of the wiring, increases the aesthetics, reduces the amount of wiring, and improves the accuracy and efficiency of work.
联合接线盒将接线装置电能表接线模块RS485接线与电能表的RS485接线端子相连，将负控接线装置RS485接线与负控终端的RS485接线端子相连，保证了电能表与终端间RS485接线正确及现场实时数据的采集。The combined junction box connects the RS485 wiring of the wiring device watt-hour meter wiring module to the RS485 terminal of the watt-hour meter, and connects the RS485 wiring of the negative control wiring device to the RS485 terminal of the negative control terminal, ensuring that the RS485 wiring between the watt-hour meter and the terminal is correct and on-site Collection of real-time data.
所述负控终端接线盒的互感器接线端连接电缆组二4，所述电缆组二与互感器端的对应端子连接。具体的，联盒接线盒至互感器接线:用12芯(按《DL/T448-2000电能计量装置技术管理规程》规定配置了A、B、C三相电流、电压线(9芯)、一对门接点线(2芯)共计12芯)的电缆线将在联合接线盒互感器接线端的输出线接到互感器端的对应端子上，保证了接线正确。The transformer terminal of the negative control terminal junction box is connected to the second cable group 4, and the second cable group is connected to the corresponding terminal of the transformer end. Specifically, the connection between the junction box junction box and the transformer: use 12 cores (A, B, C three-phase current and voltage lines (9 cores), a Connect the output line of the joint junction box transformer terminal to the corresponding terminal of the transformer terminal for the door-to-door contact line (2 cores, 12 cores in total) to ensure correct wiring.
为了直接观察内部接线，所述电能表接线盒和所述负控终端接线盒均包括盒体和盒盖，且所述盒盖为透明盒盖。因而，内部接线情况一目了然。In order to directly observe the internal wiring, both the electrical energy meter junction box and the negative control terminal junction box include a box body and a box cover, and the box cover is a transparent box cover. Therefore, the internal wiring situation is clear at a glance.
本发明的联合接线盒具有防窃电功能。所述负控终端接线盒包括盒体、盒盖及电路板，负控终端接线盒的电路板固定设置在负控终端接线盒的盒体上，负控终端接线盒的电路板上设有门节点输出端子和开盖触点一，所述门节点输出端子和所述开盖触点一电连接，所述盒盖上设有与开盖触点一相对应的开盖触点二。若盒盖在使用过程中被打开，则开盖触点一和开盖触点二之间断开，会通过终端门节点端口23将相应信息传送到主站管理系统，起到开盖探测的作用。The combined junction box of the present invention has the function of preventing electricity theft. The negative control terminal junction box includes a box body, a box cover and a circuit board, the circuit board of the negative control terminal junction box is fixedly arranged on the box body of the negative control terminal junction box, and the circuit board of the negative control terminal junction box is provided with a door The node output terminal is electrically connected to the first cover opening contact, the door node output terminal is electrically connected to the first cover opening contact, and the cover is provided with a second cover opening contact corresponding to the first cover opening contact. If the box cover is opened during use, the opening contact 1 and the opening contact 2 will be disconnected, and the corresponding information will be transmitted to the master station management system through the terminal door node port 23, which will play the role of cover opening detection .
为了使电缆固定稳固不易松动。所述电能表接线盒和所述负控终端接线盒均包括盒体和盒盖，所述电能表接线盒和负控终端接线盒上分别设有电缆卡口，所述电缆卡口由所述盒体和所述盒盖拼合形成，所述电缆卡口凸出于所述电能表接线盒和负控终端接线盒的外表面。所述电缆卡口的内表面设有用于卡设电缆的凸条，所述凸条的长度方向与电缆的长度方向垂直。盒体和盒盖安装完毕后，电缆卡口将电缆卡紧在电缆卡口内，凸条起到电缆轴向固定的作用，防止电缆滑移。In order to make the cable fixed firmly and not easy to loosen. Both the electric energy meter junction box and the negative control terminal junction box include a box body and a box cover, and the electric energy meter junction box and the negative control terminal junction box are respectively provided with cable bayonets, and the cable bayonets are formed by the The box body and the box cover are combined to form, and the cable bayonet protrudes from the outer surfaces of the electrical energy meter junction box and the negative control terminal junction box. The inner surface of the cable bayonet is provided with a protruding line for clamping the cable, and the length direction of the protruding line is perpendicular to the length direction of the cable. After the box body and the box cover are installed, the cable bayonet clamps the cable in the cable bayonet, and the raised strip plays the role of axially fixing the cable to prevent the cable from slipping.
作为一种实施方式，本发明具有不用断电可更换负控终端及电能表的功能。所述负控终端接线盒设有电压开路开关和电流短路开关。断开电压开路开关和电流短接开关就可以在不断电的情况下，更换或检修负控采集终端或电能表。As an implementation mode, the present invention has the function of replacing the load control terminal and the electric energy meter without power off. The negative control terminal junction box is provided with a voltage open circuit switch and a current short circuit switch. By disconnecting the voltage open circuit switch and the current short circuit switch, the negative control acquisition terminal or the electric energy meter can be replaced or repaired under the condition of uninterrupted power supply.
另外，所述负控终端接线盒还设有三相钳形电流表电流采样端口24。配置了A相、B相、C相钳表卡位置，方便进行电能表现场校验。In addition, the negative control terminal junction box is also provided with a three-phase clamp ammeter current sampling port 24 . Equipped with A-phase, B-phase, and C-phase clamp meter card positions, which is convenient for on-site verification of electric energy meters.
除上述优选实施例外，本发明还有其他的实施方式，本领域技术人员可以根据本发明作出各种改变和变形，只要不脱离本发明的精神，均应属于本发明所附权利要求所定义的范围。Except above-mentioned preferred embodiment, the present invention also has other embodiments, and those skilled in the art can make various changes and deformations according to the present invention, as long as they do not depart from the spirit of the present invention, all should belong to the scope defined in the appended claims of the present invention scope.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111505374A (en) * | 2020-04-29 | 2020-08-07 | 南方电网科学研究院有限责任公司 | Two-in-one metering device with mutual inspection and self-diagnosis functions and detection method |
| CN112362931A (en) * | 2020-11-16 | 2021-02-12 | 国网山东省电力公司泰安供电公司 | Three-phase four-wire meter combined junction box |
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| CN203405489U (en) * | 2013-07-30 | 2014-01-22 | 广东电网公司汕尾供电局 | A secondary combined wiring module of an electric energy metering device |
| CN210954127U (en) * | 2019-05-24 | 2020-07-07 | 国网浙江省电力有限公司绍兴供电公司 | Combined junction box for secondary circuit of electric energy metering device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203405489U (en) * | 2013-07-30 | 2014-01-22 | 广东电网公司汕尾供电局 | A secondary combined wiring module of an electric energy metering device |
| CN210954127U (en) * | 2019-05-24 | 2020-07-07 | 国网浙江省电力有限公司绍兴供电公司 | Combined junction box for secondary circuit of electric energy metering device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111505374A (en) * | 2020-04-29 | 2020-08-07 | 南方电网科学研究院有限责任公司 | Two-in-one metering device with mutual inspection and self-diagnosis functions and detection method |
| CN112362931A (en) * | 2020-11-16 | 2021-02-12 | 国网山东省电力公司泰安供电公司 | Three-phase four-wire meter combined junction box |
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