CN212112154U - Clock error adjusting device of electric energy meter - Google Patents
Clock error adjusting device of electric energy meter Download PDFInfo
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- CN212112154U CN212112154U CN202021363436.4U CN202021363436U CN212112154U CN 212112154 U CN212112154 U CN 212112154U CN 202021363436 U CN202021363436 U CN 202021363436U CN 212112154 U CN212112154 U CN 212112154U
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Abstract
The utility model relates to an electric energy meter clock error adjusting device. The electric energy meter clock error adjusting device comprises: the signal interface tool is connected with the clock tester and the power supply and is provided with at least one flat cable connecting port; the flat cable is connected with the signal interface tool through the flat cable connecting port and comprises a clock signal core wire bundle and a power supply core wire bundle; one end of the wiring tool is connected with the flat cable, the other end of the wiring tool is connected with the electric energy meter, the wiring tool is provided with a plurality of clock signal interfaces, and each clock signal interface is connected with one electric energy meter. The utility model discloses can improve the accuracy to electric energy meter clock error detection and timing.
Description
Technical Field
The utility model relates to an electric energy meter calibration equipment technical field especially relates to an electric energy meter clock error adjusting device.
Background
With the popularization of time-sharing charging of electric energy meters, the deviation or error of metering (including data such as rate switching, data freezing, electric quantity settlement and the like) caused by inaccurate daily timing error when the intelligent electric energy meter operates in various different environments directly damages the benefits of electric residents and national power grid companies, and with the continuous improvement of the technical level of the intelligent electric energy meter, the daily timing error of the manufacturer of the intelligent electric energy meter in the whole working temperature range of the electric energy meter is required to meet the corresponding technical index, for example, as indicated in the clock error requirements of the intelligent electric energy meter mentioned in the national grid enterprise standard Q/GDW 1827-2013 "three-phase intelligent electric energy meter technical specification" and Q/GDW 1364-2013 "single-phase intelligent meter technical specification", the daily timing error test of the intelligent electric energy meter and the influence test of the daily timing error at a specific environmental temperature need to be performed. In addition, along with the updating iteration of the intelligent electric energy meter product and the development and popularization of the SOC chip, the clock accuracy can be adjusted in a wide temperature range such as-25-70 ℃, so that the requirement of the intelligent electric energy meter in actual operation is met.
However, when the clock of the existing intelligent electric energy meter is calibrated, wires of a plurality of terminals (including a power supply voltage terminal, a clock output terminal and a 485 communication terminal) need to be led out from the electric energy meter at the same time, so that the tightness of the high-low temperature box body is poor, the test at the ambient temperature is inaccurate, meanwhile, signal interference is easily generated between the wires, and the detection and calibration accuracy of time errors is low.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a clock error adjusting device for an electric energy meter.
An electric energy meter clock error adjustment apparatus, comprising:
the signal interface tool is connected with the clock tester and the power supply and is provided with at least one flat cable connecting port;
the flat cable is connected with the signal interface tool through the flat cable connecting port and comprises a clock signal core wire bundle and a power supply core wire bundle;
one end of the wiring tool is connected with the flat cable, the other end of the wiring tool is connected with the electric energy meter, the wiring tool is provided with a plurality of clock signal interfaces, and each clock signal interface is connected with one electric energy meter.
In one embodiment, the signal interface tool is connected to a calibration computer for receiving calibration signals.
In one embodiment, the signal interface tool is connected with the adjusting computer through an RS 232-to-RS 485 communication module.
In one embodiment, the signal interface tool is provided with a plurality of groups of first 26-core straight needle horn sockets, and each group of the first 26-core straight needle horn sockets are connected with the second 26-core straight needle horn socket of the wiring tool through the flat cable.
In one embodiment, the other end of the second 26-core straight needle horn socket of the wiring tool is connected with a power supply voltage terminal, a clock output terminal and a 485 communication terminal of the electric energy meters.
In one embodiment, when the second 26-core straight needle horn socket is connected with a power supply voltage terminal of the electric energy meter, cores between adjacent two cores are empty.
In one embodiment, the second 26-core straight needle ox horn socket comprises a second power supply interface, a second 485 communication interface and a second clock interface, the number of the second clock interfaces is 6, the 6 second clock interfaces are respectively connected with 6 clock output terminals of the electric energy meter, the second power supply interface is connected with 6 power supply voltage terminals of the electric energy meter, and the second 485 communication interface is connected with 6 485 communication terminals of the electric energy meter.
In one embodiment, each signal interface tool is provided with four groups of first 26-core straight needle ox horn sockets, each first 26-core straight needle ox horn socket comprises a first power supply interface, a first 485 communication interface and a first clock interface, each first power supply interface is connected with the corresponding second power supply interface through the flat cable, each first 485 communication interface is connected with the corresponding second 485 communication interface through the corresponding flat cable, and each first clock interface is connected with the corresponding second clock interface through the corresponding flat cable.
In one of them embodiment, the power includes three-phase voltage regulator, three routes fuse and air switch, three-phase voltage regulator and mains connection, the three-phase voltage regulator other end with the three routes fuse is connected, every port and the air switch of the three routes fuse other end are connected, signal interface frock with the air switch other end is connected.
In one embodiment, the clock tester is connected with the clock tester through a clock sampling line.
Above-mentioned electric energy meter clock error adjusting device, through signal interface frock with power and clock acquisition signal collection, rethread winding displacement transmission is to wiring frock and electric energy meter in the high low temperature box, can reduce the opening size that the pencil got into in the high low temperature box, guarantee the leakproofness of high low temperature box, realize better temperature test effect, and avoided the interference between the pencil, and simultaneously, be connected with the winding displacement through wiring frock, draw forth a plurality of clock signal interfaces, can realize carrying out clock error detection and timing to a plurality of electric energy meters.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an apparatus for adjusting clock errors of an electric energy meter;
FIG. 2 is a schematic diagram of a wiring tool according to an embodiment;
FIG. 3 is a schematic diagram of a flat cable according to an embodiment;
fig. 4 is a schematic diagram illustrating connection between the wiring tool and the electric energy meter in one embodiment.
Detailed Description
The utility model relates to an electric energy meter clock error adjusting device solves a great deal of drawback that traditional mode of connection brought for clock error's test and timing, under the condition of high low temperature box volume fixation, has solved complicated wiring process, reduces the degree of difficulty that wrong connecing missed measure investigation work, easy dismounting, and the pencil colour is bright to be difficult for obscuring, has effectively improved the efficiency of wiring and test timing, shortens test timing cycle.
As shown in fig. 1, there is provided a clock error adjusting apparatus for an electric energy meter, including: the signal interface tool 110 is connected with the clock tester 140 and the power supply 150, and the signal interface tool 110 is provided with at least one flat cable connecting port; the flat cable 120 is connected with the signal interface tool 110 through the flat cable connecting port, and the flat cable 120 comprises a clock signal core wire bundle and a power supply core wire bundle; one end of the wiring tool 130 is connected with the flat cable 120, the other end of the wiring tool is connected with the electric energy meter 160, the wiring tool 130 is provided with a plurality of clock signal interfaces, and each clock signal interface is connected with one electric energy meter 160.
The signal interface tool 110 is connected to the clock tester 140 and the power supply 150, and can acquire a clock acquisition signal from the clock tester 140, and the power supply 150 supplies power to circuits of each part of the electric energy meter clock error adjusting device. The flat cable 120 is a flat structure, as shown in fig. 3, the flat cable can collect the clock signal core wire harness and the power source core wire harness together, so as to avoid the wires from being scattered, and the flat cable 120 is made of a high and low temperature resistant material. The clock tester is a device for collecting clock second signals, calculating clock errors and displaying the clock second signals.
Specifically, the signal interface tool 110 is connected to the wiring tool 130 and the electric energy meter 160 in the high and low temperature box body through the flat cable 120.
Above-mentioned electric energy meter clock error adjusting device, through signal interface frock with power and clock acquisition signal collection, rethread winding displacement transmission is to wiring frock and electric energy meter in the high low temperature box, can reduce the opening size that the pencil got into in the high low temperature box, guarantee the leakproofness of high low temperature box, realize better temperature test effect, and avoided the interference between the pencil, and simultaneously, be connected with the winding displacement through wiring frock, draw forth a plurality of clock signal interfaces, can realize carrying out clock error detection and timing to a plurality of electric energy meters.
In one embodiment, the signal interface tool 110 is connected to the calibration computer 170 for receiving the calibration signal. The calibration computer 170 is an upper computer equipped with an adjustable calibration clock error.
In one embodiment, the signal interface tool 110 is connected to the calibration computer 170 through an RS232 to RS485 communication module 171.
The RS 232-RS 485 communication module is connected with the adjusting computer and an RS485 communication interface in the signal interface tool and used for calling, reading and issuing commands.
In one embodiment, the signal interface tool 110 is provided with a plurality of groups of first 26-core straight needle horn sockets, and each group of the first 26-core straight needle horn sockets is connected with the second 26-core straight needle horn socket of the wiring tool through the flat cable 120.
The signal interface tool 110 can be connected with a plurality of wiring tools through a plurality of groups of first 26-core straight needle ox horn sockets, as shown in fig. 1, the signal interface tool 110 is provided with four interfaces which are respectively an interface 1, an interface 2, an interface 3 and an interface 4, each interface is connected with a flat cable, each flat cable is connected with one wiring tool 1, specifically, the interface 1 is connected with the wiring tool 1 through the flat cable 1, the interface 2 is connected with the wiring tool 2 through the flat cable 2, the interface 3 is connected with the wiring tool 3 through the flat cable 3, and the interface 4 is connected with the wiring tool 4 through the flat cable 4. The first 26-core straight needle horn socket and the second 26-core straight needle horn socket are identical in structure.
In one embodiment, the other end of the second 26-core straight needle horn socket of the wiring tool is connected with a power supply voltage terminal, a clock output terminal and a 485 communication terminal of the electric energy meters.
In this embodiment, through 26 core straight needle ox horn sockets with the supply voltage terminal, the clock output terminal and the 485 communication terminal of electric energy meter are connected, can guarantee the clean and tidy of high low temperature incasement connection pencil, avoid the signal interference between the pencil, and simultaneously, 26 core straight needle ox horn sockets of second can connect a plurality of electric energy meters simultaneously, can carry out clock error detection and calibration to a plurality of electric energy meters simultaneously, have improved detection and calibration efficiency.
In one embodiment, when the second 26-core straight needle horn socket is connected with a power supply voltage terminal of the electric energy meter, cores between adjacent two cores are empty.
The electric energy meter is an intelligent electric energy meter, can be a single-phase meter, a three-phase four-wire meter or a three-phase three-wire meter, and the power supply voltage end can be a single-phase meter, a three-phase four-wire meter or a three-phase three-wire meter. The second 26-core straight needle ox horn socket is two rows of cores which are arranged in an aligned manner, referring to fig. 2, the arrangement positions of the cores of the second 26-core straight needle ox horn socket of the wiring tool are 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 and 25 cores are arranged into a horizontal row, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24 and 26 cores are arranged into a second row, the intelligent electric energy meter is a three-phase four-wire meter, the 1 and 2 cores are connected with a supply voltage end L1 of the intelligent electric energy meter, the 5 and 6 cores are connected with a supply voltage end L2 of the intelligent electric energy meter, the 9 and 10 cores are connected with a supply voltage end L3 of the intelligent electric energy meter, the 13 and 14 cores are connected with a supply voltage end N of the intelligent electric energy meter, wherein the 3 and 4 cores between the 1, 2 cores and the 5 and 6 cores are empty, the 7 and 8 cores between the 5 and 6 cores, and 9 and 10 cores, and 12 cores between the 9 and 10 cores, the insulation spacing of the interphase voltage is increased by providing a core empty between adjacent phases.
In one embodiment, the second 26-core straight needle ox horn socket comprises a second power supply interface, a second 485 communication interface and a second clock interface, the number of the second clock interfaces is 6, the 6 second clock interfaces are respectively connected with 6 clock output terminals of the electric energy meter, the second power supply interface is connected with 6 power supply voltage terminals of the electric energy meter, and the second 485 communication interface is connected with 6 485 communication terminals of the electric energy meter.
Wherein, the second clock interface is 6 clocks that can carry out error detection and calibration to 6 electric energy meters, and 6 electric energy meters's supply voltage terminal is connected to same second power supply interface, and 6 electric energy meters's 485 communication terminal is connected to same second 485 communication interface, because every electric energy meter has the serial number, and a plurality of electric energy meters accessible are communicated with same second 485 communication interface.
In one embodiment, each of the signal interface workers 110 is provided with four sets of the first 26-core straight-needle ox-horn sockets, each of the first 26-core straight-needle ox-horn sockets includes a first power supply interface, a first 485 communication interface and a first clock interface, the first power supply interface is connected with the second power supply interface through the flat cable, the first 485 communication interface is connected with the second 485 communication interface through the flat cable, and the first clock interface is connected with the second clock interface through the flat cable.
In one of the embodiments, as shown in fig. 1, the power supply 150 includes a three-phase voltage regulator, a three-way fuse and an air switch, the three-phase voltage regulator is connected to the mains supply, the other end of the three-phase voltage regulator is connected to the three-way fuse, each port at the other end of the three-way fuse is connected to the air switch, and the signal interface tool is connected to the other end of the air switch.
The three-phase voltage regulator is used for regulating three-phase voltage of an input mains supply, as shown in fig. 1, an L1 phase, an L2 phase, an L3 phase and an N phase of the three-phase voltage regulator are connected with one end of a three-way fuse, so that isolation protection of a power supply is realized, the other end of the three-way fuse, namely the L1 phase, the L2 phase or/and the L3 phase, is connected with an IP air switch, and the other end of the three-way fuse, namely the N phase, is directly connected with the air switch to form a power supply with switchable three-phase four-wire, single-phase two-wire and three-phase three-wire. The output L1 of the air switch is connected with a voltage power supply interface L1 of the signal interface tool; the output L2 of the air switch is connected with a voltage power supply interface L2 of the signal interface tool; the output L3 of the air switch is connected with a voltage power supply interface L3 of the signal interface tool; and the output N of the air switch is connected with a voltage power supply interface N of the signal interface tool.
In one embodiment, as shown in fig. 1, the clock tester 140 is connected to the signal interface tool 110 via a clock sampling line 141.
In one embodiment, 4 sets of first 26-core straight needle horn sockets are disposed on the signal interface tool 110, and each set of first 26-core straight needle horn sockets of each signal interface tool 110 is connected to the second 26-core straight needle horn socket of each wiring tool 130. The first 26 core straight needle ox horn sockets of 4 groups include a set of voltage power supply interface, a set of RS485 communication bus interface and 24 clock signal interfaces, and the second 26 core straight needle ox horn sockets of 4 corresponding wiring frocks 130 include a set of voltage power supply interface, a set of RS485 communication bus interface and 24 clock signal interfaces, as shown in fig. 2. As shown in fig. 4, each wiring tool 130 may be connected to a supply voltage terminal, a clock output terminal, and a 485 communication terminal of 6 intelligent electric energy meters, and one signal interface tool 110 is connected to 4 wiring tools 130, and may be connected to 24 intelligent electric energy meters.
For example, as shown in fig. 2, after the first 26-core straight needle horn socket in the signal interface tool is connected with the second 26-core straight needle horn socket of the 4 wiring tools 130, 1 and 2 cores are connected with the L of the voltage interface1And 5 and 6 cores are connected with L of the voltage interface2L of 9, 10-core connection voltage interface3And 13 and 14 cores are connected with N of the voltage interface. 3. 4, 7, 8, 11 and 12 cores are empty, and the insulation distance of the interphase voltage is increased; the 17 th core is connected with the A end of the R485 communication bus, and the 18 th core is connected with the B end of the RS485 communication bus; the second 26-core straight needle horn sockets 19, 20, 21, 22, 23 and 24 of the wiring tool 1 are the positive poles of clock signals and are connected with the positive poles of CLK1, CLK2, CLK3, CLK4, CLK5 and CLK6, the second 26-core straight needle horn sockets 19, 20, 21, 22, 23 and 24 of the wiring tool 2, the wiring tool 3 and the wiring tool 4 are sequentially connected with the positive poles of CLK 7-CLK 24, and the negative poles of 25 and 26 cores of clock signals are connected with the negative poles of CLK 1-CLK 24.
Wherein, the single wiring tool in fig. 2 is divided into 6 wiring modules, for example, the wiring tool 1 is divided into 6 wiring modules, as shown in fig. 4, the wiring tool 1 is provided with 6 groups of independent wiring modules, each wiring module is composed of 1 wiring platelet and 1 second 26-core straight needle ox horn socket, the wiring platelet is provided with a voltage supply line, a clock acquisition line and an RS485 communication line, in fig. 4a, 4b, 4c, 4d, 4e and 4f, six second 26-core straight needle ox horn sockets are connected to the first 26-core straight needle ox horn socket corresponding to the interface 1Straight needle ox horn socket. In fig. 4a, 4b, 4c, 4d, 4e and 4f, 1, 2 cores connect the L of the patch panel1L of 5, 6-core connecting patch panel2L of 9, 10-core connecting patch panel3The cores N, 3, 4, 7, 8, 11 and 12 of the 13 and 14 core connection small plate are empty, the insulation distance of the inter-phase voltage is increased, the core 17 is the positive electrode of the RS485 communication bus and is connected with the positive electrode of the small plate 485, the core 18 is the negative electrode of the RS485 communication bus and is connected with the negative electrode of the small plate 485, the core 19 in fig. 4a, the core 20 in fig. 4b, the core 21 in fig. 4c, the core 22 in fig. 4d, the core 23 in fig. 4e and the core 24 in fig. 4f are the positive electrode of the clock signal and are connected with the positive electrode of the CLK of the small plate, the cores 25 and 26 in fig. 4a, 4b, 4c, 4d, 4e and 4f are the negative electrode of the CLK of the clock signal and are connected with the positive electrode and the negative electrode of the clock output terminal of the intelligent electric energy meter.
In one embodiment, as shown in fig. 3, each flat cable 120 includes 7 FC-26P plugs (signal interface end, plug 1, plug 2, plug 3, plug 4, plug 5, and plug 6), each FC-26P plug is connected to a 26-core wire harness, one FC-26P plug (signal interface end) is connected to one interface of the signal interface tool, and the other 6 FC-26P plugs are respectively connected to 26-core straight-pin horn sockets of 6 independent terminal platelets of the connection tool.
In one embodiment, the clock error adjusting apparatus of the electric energy meter further includes: a simple pulse per second test fixture (LED); the simple pulse per second testing tool (LED) is made of a light emitting diode, a resistor and a battery. The simple pulse per second testing tool (LED) is connected with 24 clock signal interfaces of the signal interface tool and used for rapidly testing whether 24 clock output ports are normal or not.
The utility model discloses an electric energy meter clock error adjusting device can connect most electric energy meters, tests and adjusts the clock error of the electric energy meter of many data volume, and the device cost is low, occupation space is little, the high low temperature test box volume of the abundant benefit of the very big degree; the test and the adjustment operation after the high-low temperature box is started are finished on a computer, a plurality of electric energy meters can be tested at one time, the test time is saved, and the test efficiency is improved.
The adjusting computer performs information interaction with an RS485 terminal of the electric energy meter through an RS 232-to-RS 485 communication module, can call and read related parameters of the electric energy meter and adjust clock errors, and the adjusting software supports a windows operating system and meets the 698.45 and 645 protocols from the electric energy surface to the object. The RS 232-RS 485 conversion communication module is connected with a first 485 communication interface of the signal interface tool; the anode of the RS 232-to-RS 485 communication module is connected with the anode of a first 485 communication interface of the signal interface tool, and the cathode of the RS 232-to-RS 485 communication module is connected with the cathode of the first 485 communication interface of the signal interface tool; the adjusting computer realizes data transmission with the plurality of electric energy meters in a 485 bus communication mode.
In one embodiment, the communication address of the electric energy meter is recorded, every 6 electric energy meters are arranged in a group in sequence in the high-low temperature box body and are connected with 6 small wiring boards of the wiring tool (taking a three-phase four-wire meter as an example). The power supply voltage line L1 of the wiring tool is connected with the L1 of the tested intelligent electric energy meter; the power supply voltage line L2 of the wiring tool is connected with the L2 of the tested intelligent electric energy meter; the power supply voltage line L3 of the wiring tool is connected with the L3 of the tested intelligent electric energy meter; a power supply voltage line N of the wiring tool is connected with N of the intelligent electric energy meter to be tested; a communication line 485+ of the wiring tool is connected with the 485+ of the intelligent electric energy meter to be tested; a communication line 485-of the wiring tool is connected with the 485-of the intelligent electric energy meter to be tested; a clock sampling line CLK + of the wiring tool is connected with CLK + of the tested intelligent electric energy meter; a clock sampling line CLK-of the wiring tool is connected with CLK-of the tested intelligent electric energy meter; wiring frock 1 to wiring frock 4 connect gradually with 4 winding displacement, 4 with the winding displacement through high low temperature case walk the line hole with the interface 1 to the interface 4 connection of signal interface frock.
After the connection is finished, the output voltage of the three-phase voltage regulator is adjusted to supply power to the electric energy meter, a test interface of the adjusting computer is opened, the communication address of the electric energy meter is sequentially recorded, the function of the 485 communication interface is confirmed, the functions of 24 clock output ports are confirmed by a simple second pulse test tool (LED), the test temperature of the high-low temperature box is set, the high-low temperature box is operated, a clock sampling line of the clock tester is directly connected with 24 clock output ports in a signal interface tool, the clock error is tested, the daily timing which does not accord with the internal control requirement is adjusted by adjusting software, and test data are recorded.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An electric energy meter clock error adjusting device, comprising:
the signal interface tool is connected with the clock tester and the power supply and is provided with at least one flat cable connecting port;
the flat cable is connected with the signal interface tool through the flat cable connecting port and comprises a clock signal core wire bundle and a power supply core wire bundle;
one end of the wiring tool is connected with the flat cable, the other end of the wiring tool is connected with the electric energy meter, the wiring tool is provided with a plurality of clock signal interfaces, and each clock signal interface is connected with one electric energy meter.
2. The device of claim 1, wherein the signal interface assembly is connected to a calibration computer for receiving calibration signals.
3. The device of claim 2, wherein the signal interface assembly is coupled to the calibration computer via an RS232 to RS485 communication module.
4. The device for adjusting the clock error of the electric energy meter according to claim 1, wherein the signal interface tool is provided with a plurality of groups of first 26-core straight needle horn sockets, and each group of the first 26-core straight needle horn sockets is connected with the second 26-core straight needle horn socket of the wiring tool through the flat cable.
5. The clock error adjusting device of the electric energy meter according to claim 4, wherein the other end of the second 26-core straight needle horn socket of the wiring tool is connected with a power supply voltage terminal, a clock output terminal and a 485 communication terminal of the electric energy meter.
6. The device of claim 5, wherein when the second 26-core straight needle horn socket is connected to the supply voltage terminal of the electric energy meter, adjacent alternate cores are empty.
7. The clock error adjusting device of the electric energy meter according to claim 5, wherein the second 26-core straight-pin ox horn socket comprises 6 second power supply interfaces, 6 second clock interfaces and 6 clock output terminals, the 6 second power supply interfaces are connected to the 6 power supply voltage terminals of the electric energy meter, and the second 485 communication interfaces are connected to the 485 communication terminals of the electric energy meter.
8. The device of claim 7, wherein each of the signal interface fixtures comprises four sets of the first 26-core straight-needle ox-horn sockets, each of the first 26-core straight-needle ox-horn sockets comprises a first power supply interface, a first 485 communication interface and a first clock interface, the first power supply interface is connected with the second power supply interface through the flat cable, the first 485 communication interface is connected with the second 485 communication interface through the flat cable, and the first clock interface is connected with the second clock interface through the flat cable.
9. The device of claim 1, wherein the power supply comprises a three-phase voltage regulator, a three-way fuse and an air switch, the three-phase voltage regulator is connected to the mains supply, the other end of the three-phase voltage regulator is connected to the three-way fuse, each port at the other end of the three-way fuse is connected to the air switch, and the signal interface tool is connected to the other end of the air switch.
10. The device of claim 1, wherein the clock tester is connected to the clock tester via a clock sampling line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021363436.4U CN212112154U (en) | 2020-07-13 | 2020-07-13 | Clock error adjusting device of electric energy meter |
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| CN202021363436.4U CN212112154U (en) | 2020-07-13 | 2020-07-13 | Clock error adjusting device of electric energy meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325685A (en) * | 2021-06-01 | 2021-08-31 | 安徽南瑞中天电力电子有限公司 | Automatic adjusting device for multi-meter parallel daily timing of intelligent electric energy meter |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325685A (en) * | 2021-06-01 | 2021-08-31 | 安徽南瑞中天电力电子有限公司 | Automatic adjusting device for multi-meter parallel daily timing of intelligent electric energy meter |
| CN113325685B (en) * | 2021-06-01 | 2022-03-29 | 安徽南瑞中天电力电子有限公司 | Automatic adjusting device for multi-meter parallel daily timing of intelligent electric energy meter |
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