JP2007292581A - Watt-hour meter inspection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a watt-hour meter inspection apparatus capable of performing a series of required inspections on wiring systems associated with the installation of watt-meters, voltage, phase rotation, verification of operation of the watt-hour meters, etc. <P>SOLUTION: The measuring-terminal integrated-type watt-hour meter inspection apparatus is provided with a body part 15 in which various measuring apparatuses are build; a measuring terminal part 80 comprising a plurality of terminals fixed to the body part 15; and a display part 50 mounted to the body part 15. The body part 15 comprises a voltage measuring means 30, a phase rotation detection means 40, an electric load 20 for operating a watt-hour meter 100 to be measured. The measuring terminal part 80 is connected to the watt-hour meter to be measured and matches in pitch with the arrangement of a terminal group of the watt-hour meter. The display part 50 displays the inspected results. By holding the body part 15, in such a way that the display part 50 may be seen and bringing the measuring terminal part 80 into contact with the terminal group of the watt-hour meter 100 to be measured, inspection results are uniquely displayed on the display part 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a watt-hour meter inspection device for wiring and operation check accompanying installation of a watt-hour meter.

  The purpose of installing a watt hour meter is to perform accurate metering for power trading. Conventionally, inspectors used measuring instruments such as voltmeters and phase detectors for self-inspection inspection after wiring work, and confirmed that the watt-hour meter is in normal use, and then installed actual electrical equipment, etc. It has been confirmed whether or not the watt hour meter operates normally by using it.

  As a conventional technique, a method of confirming operation by utilizing a measurement pulse of an electronic watt-hour meter has been introduced (for example, see Patent Document 1). Moreover, the apparatus which measures an alternating voltage and a three-phase phase sequence is also introduced (for example, refer patent document 2, 3). However, there are no devices that can perform a series of necessary tests such as voltage measurement, phase rotation detection, and operation check for watt-hour meters.

Japanese Utility Model Publication No. 8-1503 Japanese Patent Application Laid-Open No. 6-213952 JP 2003-114246 A

  In the wiring and operation check associated with the installation of the watt hour meter, multiple types of measuring instruments are selectively used, and the actual electrical equipment is connected to the watt hour meter to check the operation. There was a problem that it took a long time to complete the measurement. In addition, inspectors who are unfamiliar with the measurement may mistake the measurement method of the watt hour meter, reversely connect the measurement device to the watt hour meter, or short circuit between the live line terminals of the measurement device or the watt hour meter. There was also a problem.

  The present invention provides a watt-hour meter inspection device capable of performing a series of necessary inspections such as a wiring method, voltage, phase rotation, and watt-hour operation check accompanying installation of a watt-hour meter in a single operation. With the goal.

  In order to solve the above problems, the inventor has made the following invention based on the experience of actually installing and inspecting the watt-hour meter.

  (1) A measurement terminal comprising: a main body portion in which various measuring devices are incorporated; a measurement terminal portion including a plurality of terminals fixedly installed on the main body portion; and a display portion attached to the main body portion. An integrated watt-hour meter inspection device, wherein the main body includes voltage measuring means, phase rotation detecting means, and an electric load for operating a watt-hour meter to be measured, and the measurement terminal portion Is connected to the watt-hour meter to be measured, the arrangement of the terminal group of the watt-hour meter is matched with the pitch, and the display section is a result display section for displaying the inspection result The measurement terminal unit is brought into contact with a terminal group of a watt-hour meter to be measured by holding the main body unit so that the display unit can be seen, whereby the inspection result is uniquely displayed on the display unit. Electricity meter inspection device.

  According to the invention of (1), the main part of the watt-hour meter inspection device of the present invention has a voltage measuring means, a phase rotation detecting means, and an electric load for operating the watt-hour meter to be measured, Integrated with measurement terminals. Since the measurement terminal portion of the watt-hour tester according to the present invention matches the pitch of the terminal group of the watt-hour meter, it can be reliably connected to the watt-hour meter. The display unit has a result display unit for displaying the inspection result. Hold the main body so that the display part can be seen and contact the terminal group of the watt hour meter to be measured to determine the connection between the terminals uniquely, perform the necessary series of inspections, The inspection result is displayed on the display unit.

  Therefore, the following effects can be obtained. The main part of the watt-hour tester of the present invention has a voltage display means, a phase rotation detection means, and an electric load for operating the watt-hour meter to be measured, and a result display section for displaying the test result. Because it is provided, a series of necessary tests can be performed. Since the measurement terminal part of the watt-hour inspection device of the present invention is aligned with the arrangement of the terminal group of the target watt-hour meter and is integrated with the main body, incorrect measurement and incorrect connection of the inspector are possible. Can be prevented.

  (2) It has means for inspecting a single-phase two-wire system, a single-phase three-wire system, or a three-phase three-wire system, and the result display unit displays the inspection result. Meter inspection device.

  According to the invention of (2), the energy meter inspection device of the present invention has means for inspecting a single-phase two-wire system, a single-phase three-wire system, or a three-phase three-wire system, and the result display section is Display test results.

  Therefore, the following effects can be obtained. Use the watt-hour meter inspection device of the present invention to check the wiring system associated with the installation of a single-phase two-wire watt-hour meter, single-phase three-wire watt-hour meter or three-phase three-wire watt-hour meter Can do.

  (3) The adapter that can be connected to the watt hour meter for measurement even when the measurement terminal unit of the watt hour meter inspection device does not match the pitch of the terminal group of the watt hour meter. The watt-hour meter inspection device according to any one of (1) to (2).

  According to the invention of (3), the measurement terminal portion of the watt-hour meter inspection device of the present invention can be measured by using an adapter even when the pitch of the terminal group of the watt-hour meter does not match the pitch. Can be connected to the watt hour meter.

  Therefore, the following effects can be obtained. Even if it is not possible to connect directly because the measurement terminal part of the watt-hour meter inspection device of the present invention does not match the pitch of the terminal group of the watt-hour meter, it can be connected using an adapter, so the inspector's mistake Measurement and incorrect connection can be prevented.

  (4) The energy meter inspection device according to (3), wherein the measurement terminal unit or the adapter includes a guide made of an insulator.

  According to invention of (4), the guide comprised with the insulator is provided in the measurement terminal part or adapter of the watt-hour test | inspection apparatus of this invention.

  Therefore, the following effects can be obtained. Since the measurement terminal unit and the watt hour meter of the watt hour meter inspection apparatus of the present invention are connected using a guide, it is possible to further prevent an inspector's erroneous measurement and erroneous connection.

  According to the present invention, the main part of the watt-hour meter inspection device of the present invention has voltage measuring means, phase rotation detecting means, and an electric load for operating the watt-hour meter to be measured, and a measurement terminal; Since it is an integrated type, it is possible to check the wiring accompanying the installation of the watt hour meter and check the operation of the watt hour meter. The measurement terminal part of the watt-hour meter inspection device of the present invention is connected to the watt-hour meter, and since the arrangement and pitch of the terminal group of the watt-hour meter are matched, incorrect measurement and error of the inspector Connection can be prevented.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. This is merely an example, and the technical scope of the present invention is not limited to this.

[First Embodiment]
FIG. 1 is a block diagram showing the configuration of a watt-hour meter inspection device according to the present invention. FIG. 2 is an external view of the watt-hour meter inspection device. FIG. 3 is a diagram when the watt-hour meter inspection device and the watt-hour meter according to the present invention are connected. FIG. 4 shows an operation flow when the inspector uses the watt-hour meter inspection device and an operation flow of the watt-hour meter inspection device. FIG. 5 is a flowchart showing one embodiment of the determination by the determination means and the subsequent processing.

  As shown in FIG. 1, the watt-hour testing device 10 includes a main body 15 in which various measuring devices are incorporated, and a plurality of terminals 71, 72, 73, 61, 62 fixedly installed on the main body 15. , 63 and a display unit 50 attached to the main body unit 15. Various measuring devices built in the main body 15 include an electrical load 20, a voltage measuring unit 30, and a phase rotation detecting unit 40. The measurement terminal unit 80 is connected to terminals 71a, 72a, 73a, 61a, 62a, and 63a of the watt-hour meter 100 (see FIG. 3). Terminals 71, 72, and 73 in part A in FIG. 1 are measurement terminal portions that are connected to the power supply side terminals 71a, 72a, and 73a (see FIG. 3) of the watt-hour meter 100, respectively. Terminals 61, 62, 63 in part B in FIG. 1 are measurement terminal parts connected to the load side terminals 61a, 62a, 63a (see FIG. 3) of the watt-hour meter 100, respectively. The arrangement of the terminals 71, 72, 73 and the terminals 61, 62, 63 matches the arrangement and pitch of the terminals 71a, 72a, 73a and the terminals 61a, 62a, 63a of the watt-hour meter 100.

  The voltage measuring means 30 measures the voltage between the terminals 71, 72 and 73. The phase rotation detection means 40 detects phase rotation when a three-phase voltage AC voltage is applied to the terminals 71, 72, 73. When the terminals 61, 62, and 63 are connected to the load-side terminals 61 a, 62 a, and 63 a of the watt hour meter 100, the electrical load 20 has the watt hour meter 100 even if the actual load is not connected to the watt hour meter 100. It is a pseudo load for operating. The electrical load 20 can be realized by an element having impedance such as a resistor, a capacitor, a reactor, or a combination thereof. Also, the load can be made variable by a semiconductor circuit. The display unit 50 is a part that displays the inspection result of the watt-hour meter 100. The display unit 50 can be realized by a component that displays an image, such as a liquid crystal or an organic EL. The display unit 50 may be an LED.

  FIG. 2 is an external view of the electricity meter inspection device 10. As shown in FIG. 2, the terminals 71, 72, and 73 in the A portion, the terminals 61, 62, and 63 in the B portion, and the display portion 50 are formed integrally with the main body portion 15. The display unit 50 is arranged on the main body unit 15 so as to be on the front side of the main body unit 15 when the measurement terminal unit 80 faces the terminal of the watt hour meter 100. Therefore, when the watt hour meter 100 is measured, the inspector can hold the main body portion 15 while looking at the display unit 50 on the front side, so that the position of the measurement terminal unit 80 is uniquely determined.

  FIG. 3 shows a state when the inspector connects the watt-hour meter inspection device 10 to the watt-hour meter 100. 3A is a diagram before connection, FIG. 3B is a diagram during connection operation, and FIG. 3C is a diagram after connection. The terminals 71, 72, 73 and the terminals 61, 62, 63 of the watt-hour tester 10 have the same pitch as the arrangement of the terminals 71 a, 72 a, 73 a and the terminals 61 a, 62 a, 63 a of the watt-hour meter 100. Therefore, the inspector can reliably connect the watt-hour meter inspection device 10 and the watt-hour meter 100. After the connection, the inspector performs a series of inspections described later.

  As described above, since the inspector performs the measurement of the watt hour meter 100 while looking at the display unit 50 on the front side of the main body unit 15, the terminals 71, 72, 73 and the terminal 61, The positions of 62 and 63 are uniquely determined. Further, the arrangement of the terminals 71, 72, 73 and the terminals 61, 62, 63 matches the arrangement of the terminals 71a, 72a, 73a and the terminals 61a, 62a, 63a of the watt-hour meter 100 with the pitch. Therefore, even an inspector who is unfamiliar with measurement does not perform an incorrect measurement method of reverse connection or an incorrect operation method of short-circuiting between live-wire terminals.

  FIG. 4 shows an operation flow when the inspector uses the watt-hour meter inspection device 10 and an operation flow of the watt-hour meter inspection device 10. When the inspector connects the watt-hour inspection device 10 to the watt-hour meter 100, the watt-hour inspection device 10 performs voltage / potential detection (step S110) of the connected terminal. Thereafter, the voltage and potential between the terminals are measured (step S120). If there are three phases from the voltage / potential detection of the connected terminal, phase rotation is detected (step S130). Discrimination by the discriminating means is performed based on these measured or detected data (step S140). The discriminating means may be created by an electronic circuit, or a microcomputer may be provided inside the watt-hour tester 10 and processed by software. The determination means will be described later in detail. The result of measurement discrimination is displayed (step S150). The inspector confirms on the display unit 50 whether or not the original specifications for the voltage and phase rotation are met.

  Further, the inspector checks the operation of the watt-hour meter 100 while remaining in the connected state. The electricity meter inspection device 10 has an electric load 20 incorporated therein. The operation of the watt hour meter 100 can be confirmed without connecting an actual load to the watt hour meter 100 (step S210). Since a pseudo electric load is connected to the watt hour meter 100, the watt hour meter 100 operates even when an actual load is not connected. When the watt hour meter 100 is an inductive watt hour meter, the disk rotates, and when the watt hour meter 100 is an electronic watt hour meter, the colon mark (● mark) on the time display section flashes, The operation of the watt-hour meter 100 can be confirmed.

  Therefore, the inspector can check the operation of the watt-hour meter 100 without using a long time by using an actual electric device or the like.

  FIG. 5 is a flowchart showing one embodiment of the determination by the determination means and the subsequent processing. Details of the determination by the determination unit will be described below with reference to the flowchart.

  Based on the measurement data of the voltage / potential detection (step S110) and voltage / potential measurement (step S120) described above, it is determined whether or not it is a single-phase two-wire system (step S720). In the case of YES, the voltage measurement between each terminal and its display are performed (step S740). Thereafter, the ground potential is measured and displayed (step S750). Then, the determination result is displayed on the display unit 50 (step S800).

  If the determination of whether or not it is a single-phase two-wire system (step S720) is NO, it is determined whether or not it is a single-phase three-wire system (step S730). When the determination is YES, voltage measurement between the terminals and display thereof are performed (step S780). Thereafter, the ground potential is measured and displayed (step S790). Then, the determination result is displayed on the display unit 50 (step S800).

  It is determined whether or not it is a single-phase three-wire system (step S730), and if the determination is NO, it is estimated that there are three phases, so voltage measurement between each terminal is performed between three terminals and displayed ( Step S760). Thereafter, phase rotation is detected and displayed (step S770). Then, the determination result is displayed on the display unit 50 (step S800).

  The display content of the display unit 50 includes voltage measurement results (for example, single-phase two-wire 100V, single-phase two-wire 200V, single-phase three-wire 100V / 200V, three-phase three-wire 200V, etc.) Normal phase, reverse phase) and potential (for example, in the case of single-phase two-wire 100V, single-phase three-wire 100V / 200V, it is indicated that the potential of 2S is approximately 0V). In addition, for example, when there is an abnormality such as an erroneous connection or a fuse on a utility pole, an error can be displayed and an alarm can be sounded.

  As described above, by using the watt-hour meter inspection device 10 of the present invention, a series of necessary inspections such as the wiring method, voltage, phase rotation, and watt-hour operation check accompanying the installation of the watt-hour meter are performed. Can do. Moreover, the inspector can confirm the operation of the watt-hour meter 100 without using a long time by using an actual electric device or the like.

  Further, since the inspector can perform the measurement while looking at the display unit 50 on the front side, the position of the terminal is uniquely determined. Further, the arrangement of the terminals 71, 72, 73 and the terminals 61, 62, 63 matches the arrangement and pitch of the terminals 71a, 72a, 73a and the terminals 61a, 62a, 63a of the watt-hour meter 100. Therefore, even an inspector who is unfamiliar with the measurement can solve the problems that the measurement method is erroneously reversely connected and that the live wire terminals may be short-circuited.

[Second Embodiment]
FIG. 6 is a diagram illustrating a modified example that differs from the watt-hour meter inspection apparatus 10 according to the first embodiment in terms of external shape. The watt-hour tester 10a shown in FIG. 6 is different from the watt-hour tester 10 in that the number of terminals is four. Since the watt-hour meter inspection device 10a can inspect a single-phase two-wire type, for example, it is used when inspecting a single-phase two-wire watt-hour meter. The voltage measuring means and the electrical load provided in the watt-hour tester 10a are the same as the voltage measuring means and the electrical load of the watt-hour tester 10. However, since the watt-hour meter inspection device 10a does not include the phase rotation detection means inside thereof, it can be reduced in weight and size.

  Since the pitch of the arrangement of the measurement terminal unit 80 and the arrangement of the terminals of the single-phase two-wire watt-hour meter is the same, the terminals 71 and 72 and the terminals 61 and 62 of the watt-hour measuring device 10a are single-phase two-wire. It can be directly connected to the terminal of the electric energy meter. Specifically, since the terminals 61 and 62 have the same pitch as the load-side arrangement of the single-phase two-wire watt-hour meter, the terminals 61 and 62 are connected to the load-side terminals of the single-phase two-wire watt-hour meter. Contact. Since the terminals 71 and 72 of the measurement terminal unit 80 have the same pitch as the arrangement of the power supply side terminals of the watt hour meter 100, the terminals 71 and 72 of the measurement terminal unit 80 are connected to the power supply side of the single-phase two-wire watt hour meter. Contact. The display unit 50 displays the measurement result of the single-phase two-wire watt-hour meter. The watt-hour meter inspection device 10a has the same effects as those of the first embodiment.

[Third Embodiment]
FIG. 7 shows the connection between the watt-hour meter inspection device 10 and the adapter 200 when the single-phase two-wire watt-hour meter is inspected when the number of measurement terminals 80 is six. The adapter 200 is used when the measurement terminal unit 80 of the watt-hour tester 10 has a different terminal arrangement or pitch of the single-phase two-wire watt-hour meter. Specifically, the terminals 271, 272, 261, and 262 on the side in contact with the single-phase two-wire watt-hour meter of the adapter 200 have the same pitch as the terminal arrangement of the single-phase two-wire watt-hour meter. The arrangement and pitch of the insertion portions 71 b, 72 b, 73 b, 63 b, 62 b, 61 b of the adapter 200 on the side where the wattmeter inspection device 10 is inserted are the terminals 71, 72, 73, 63, 62 of the wattmeter inspection device 10. , 61 and the pitch are the same. Therefore, the adapter 200 can be in close contact with the watt-hour inspection device 10. The adapter 200 electrically connects the terminals 271, 272, 261, and 262 and the terminals 71, 72, 61, and 62 inside.

  Therefore, even when the arrangement and pitch of the terminals of the single-phase two-wire watt-hour meter are different from the terminals of the watt-hour meter inspection device 10, the inspector attaches the adapter 200 to the watt-hour meter inspection device 10. Thus, the watt-hour meter inspection device 10 integrated with the adapter 200 can be connected to the single-phase two-wire watt-hour meter. Therefore, the watt-hour tester 10 provided with the adapter 200 has the same effects as the watt-hour tester 10a.

[Fourth Embodiment]
As shown in FIG. 8, the watt-hour test device 10c includes a voltage measurement unit 10c ′ and an electrical load connection unit 10c ″. The voltage measurement unit and the phase rotation detection unit of the voltage measurement unit 10c ′ are terminals 471 and 472, respectively. , 473, and the electric load of the electric load connecting portion 10c ″ is connected to the terminals 461, 462, 463. The inspector can check the wiring to the watt hour meter 100 using the voltage measurement unit 10c ′ including the voltage measurement unit and the phase rotation detection unit. Similarly, the inspector can check the operation of the watt-hour meter 100 using the electric load connecting portion 10c ″ including the electric load. The voltage measuring unit 10c ′ and the electric load connecting portion 10c ″ are connected by the adapter 300. Integrated voltage / potential measurement, phase rotation detection, and electrical load connection.

  The terminals 371, 372, 373, 361, 362, and 363 on the side of the adapter 300 that comes into contact with the energy meter 100 have the same arrangement and pitch as the terminals of the energy meter 100. The arrangement and pitch of the insertion portions 471a, 472a, and 473a on the side where the voltage measurement unit 10c 'of the adapter 300 is inserted are the same as the arrangement of the terminals 471, 472, and 473 of the voltage measurement unit 10c'. The arrangement and pitch of the insertion portions 461a, 462a and 463a on the side where the electric load connection portion 10c "of the adapter 300 is inserted are the same as the arrangement and pitch of the terminals 461, 462 and 463 of the electric load connection portion 10c". Therefore, the watt-hour tester 10c has the same effects as the watt-hour tester 10 by assembling the voltage measuring unit 10c 'and the electrical load connecting unit 10c "to the adapter 300.

[Fifth Embodiment]
As illustrated in FIG. 9, the watt-hour meter inspection device 10 d includes a guide 910 in the watt-hour meter inspection device 10. The guide 910 is formed at a position where the terminal of the watt-hour tester 10 d is inserted into the terminal of the watt-hour meter 100 when the watt-hour tester 10 d is used for the watt hour meter 100. The guide 910 is made of an insulating material and extends longer than the measurement terminal in order to prevent contact of the measurement terminal. Since the tip 911 of the guide 910 is movable and retracted when pressed, the measurement terminal comes into contact with the terminal of the wattmeter 100 when the guide 910 is pressed. One guide 910 can be provided, and can be realized in the same manner even if it is provided between the measurement terminals.

  FIG. 9 shows a single-phase three-wire system or a three-phase three-wire system in which two guides 910 are provided outside the measurement terminal. Thereby, the watt-hour meter inspection device 10d is connected to an accurate position of the watt-hour meter 100. Specifically, the inspector cannot connect the right terminals 61 and 62 of the watt-hour tester 10 to the power source side of the watt-hour meter 100 by mistake.

  In other words, even if the inspector tries to mistakenly connect the load-side terminals 61 and 62 of the watt-hour tester 10 to the power source side of the watt-hour meter 100, the guide 910 is not the predetermined position of the watt-hour meter 100 first. Because of contact with the position of, erroneous connection is prevented. If the inspector places the guide 910 along the frame of the watt hour meter 100 or the like, the measurement terminal and the terminal of the watt hour meter 100 come into contact with each other, and the contact can be made normally.

  As mentioned above, although demonstrated using embodiment of this invention, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention. For example, the liquid crystal display can be similarly realized by using another display, for example, an LED.

It is a block diagram which shows the structure of the watt-hour meter test | inspection apparatus of 1st Embodiment which concerns on this invention. It is an external view of the watt-hour inspection apparatus shown in FIG. It is a figure in the case of connecting the watt-hour tester shown in FIG. 1 and a watt-hour meter. The operation | movement when an inspector uses the watt-hour meter inspection apparatus shown in FIG. 1 and the operation | movement flow of a watt-hour meter inspection apparatus are shown. It is a flowchart figure which shows one Example of the determination by a determination means, and a subsequent process. It is a figure which shows the watt-hour meter test | inspection apparatus of 2nd Embodiment which concerns on this invention. It is a figure which shows joining of the watt-hour meter test | inspection apparatus and adapter of 3rd Embodiment which concern on this invention. It is a figure which shows joining of the watt-hour meter test | inspection apparatus and adapter of 4th Embodiment which concern on this invention. It is a figure which shows the watt-hour test | inspection apparatus of 5th Embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10a, 10c, 10d Electricity meter inspection apparatus 20 Electric load 30 Voltage measurement means 40 Phase rotation detection means 50 Display part 61-63 Load side terminal 71-73 Power supply side terminal 80 Measurement terminal part 100 Wattmeter

Claims (4)

A measurement terminal integrated type comprising: a main body portion in which various measuring devices are incorporated; a measurement terminal portion including a plurality of terminals fixedly installed on the main body portion; and a display portion attached to the main body portion. A watt-hour meter inspection device,
The main body has voltage measuring means, phase rotation detecting means, and an electric load for operating a watt-hour meter to be measured,
The measurement terminal part is connected to the watt-hour meter to be measured, and the arrangement of the terminal group of the watt-hour meter is matched with the pitch,
The display unit includes a result display unit for displaying a test result,
The watt-hour meter in which the test result is uniquely displayed on the display unit by bringing the main body part into contact with the terminal group of the watt-hour meter to be measured so that the display unit can be seen. Inspection device.   The watt-hour meter according to claim 1, further comprising means for inspecting a single-phase two-wire system, a single-phase three-wire system, or a three-phase three-wire system, wherein the result display unit displays a wiring system test result. Inspection device. The measurement terminal part of the watt-hour meter inspection device is
The watt-hour meter inspection device according to claim 1, further comprising an adapter that can be connected to the watt-hour meter for measurement even when the pitch of the terminal group of the watt-hour meter does not match the pitch. . The watt-hour meter inspection device according to claim 3, wherein the measurement terminal unit or the adapter includes a guide made of an insulator.

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