CN215599262U

CN215599262U - Multifunctional measuring device for measuring alternating-current impedance and iron loss

Info

Publication number: CN215599262U
Application number: CN202120645264.8U
Authority: CN
Inventors: 黎海凡
Original assignee: China Yangtze Power Co Ltd
Current assignee: China Yangtze Power Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-01-21
Anticipated expiration: 2031-03-30

Abstract

A multifunctional measuring device for measuring alternating current impedance and iron loss comprises a shell, wherein an alternating current voltmeter, an alternating current ammeter, a low-power factor power meter, a single-pole double-throw switch S2 and a single-pole double-throw switch S1 are arranged in the shell; the outer wall of the shell is provided with a first external port and a second external port; the single-pole double-throw switch S2 comprises an S2 iron loss branch and an S2 impedance branch, and the single-pole double-throw switch S1 comprises an S1 iron loss branch and an S1 impedance branch; the alternating-current voltmeter, the alternating-current ammeter, the low-power factor power meter, the single-pole double-throw switch S2 and the single-pole double-throw switch S1 are connected through a lead to form a combined measuring loop; the device converts the reactance alternating-current impedance test and iron loss test wiring from principle distributed wiring into centralized wiring, the number of the wiring is changed from more than 10 to 4, the test wiring is greatly simplified, and the wiring error rate is reduced.

Description

Multifunctional measuring device for measuring alternating-current impedance and iron loss

Technical Field

The utility model belongs to the field of electrical measuring instruments, and particularly relates to a multifunctional measuring device for measuring alternating-current impedance and iron loss.

Background

The reactance winding alternating current impedance measurement and the large-scale hydraulic generator stator iron loss test need to measure current, voltage and power loss. During testing, an ammeter, a voltmeter and a low-power factor power meter need to be connected, the field wiring is many and complicated, the occupied area is large, the tidiness and the order are not enough, and the lines are easy to connect wrongly and operate wrongly. Therefore, there is a need for a device that can satisfy the measurement of multiple parameters.

Disclosure of Invention

In view of the technical problems in the background art, the multifunctional measuring device for measuring the alternating current impedance and the iron loss provided by the utility model converts the connection of the reactance alternating current impedance test and the iron loss test into centralized connection from principle distributed connection, and the number of the connection is changed from more than 10 to 4, so that the test connection is greatly simplified, and the connection error rate is reduced.

In order to solve the technical problems, the utility model adopts the following technical scheme to realize:

a multifunctional measuring device for measuring alternating current impedance and iron loss comprises a shell, wherein an alternating current voltmeter, an alternating current ammeter, a low-power factor power meter, a single-pole double-throw switch S2 and a single-pole double-throw switch S1 are arranged in the shell; the outer wall of the shell is provided with a first external port and a second external port; the single-pole double-throw switch S2 comprises an S2 iron loss branch and an S2 impedance branch, and the single-pole double-throw switch S1 comprises an S1 iron loss branch and an S1 impedance branch;

the alternating-current voltmeter, the alternating-current ammeter, the low-power factor power meter, the single-pole double-throw switch S2 and the single-pole double-throw switch S1 are connected through a lead to form a combined measuring loop;

when measuring alternating-current impedance, the first external port is used for connecting the output end of the single-phase alternating-current voltage regulator, and the second external port is used for connecting the two ends of the reactance winding;

when measuring the iron loss, first outside port is used for connecting current transformer secondary winding, and the second outside port is used for connecting test voltage measurement coil both ends.

In a preferred embodiment, the first external port includes a first external port first terminal and a first external port second terminal; the second external port comprises a first external port terminal and a second external port terminal; the low power factor power meter comprises an 'I' terminal, a 'U' terminal, an 'I' terminal and a 'U' terminal;

the first external port I terminal is sequentially connected with an alternating current meter, an 'I' terminal, a 'U' terminal and a second external port II terminal through a lead;

the second terminal of the first external port is sequentially connected with the S1 iron loss branch, the S2 iron loss branch and the 'I' terminal through leads;

the first external port II terminal is sequentially connected with the S1 impedance branch circuit, the second external port II terminal and the U terminal through leads; an alternating current voltmeter is connected in parallel to the second external port;

and the first terminal of the second external port is connected with the 'U star' terminal through a lead.

In a preferred scheme, the shell is an epoxy resin shell.

The device can achieve the following beneficial effects:

1. the device converts the reactance alternating-current impedance test and iron loss test wiring from principle distributed wiring into centralized wiring, the number of the wiring is changed from more than 10 to 4, the test wiring is greatly simplified, and the wiring error rate is reduced.

2. The centralized wiring of this device is convenient for expand and accomodate, practices thrift test site, test time, has improved test efficiency.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a wiring schematic of the present invention;

FIG. 2 is an external view of the present invention;

FIG. 3 is a wiring diagram for AC impedance measurement according to the present invention;

FIG. 4 is an equivalent schematic diagram of an AC impedance measurement wiring diagram of the present invention;

FIG. 5 is a wiring diagram for the iron loss test of the present invention;

FIG. 6 is an equivalent schematic diagram of a connection diagram for iron loss test according to the present invention.

In the figure: terminal 1, wire 2, single-pole double-throw switch S2 number 3, alternating-current voltmeter 4, second external port 5, terminal 51 No. one of second external port, terminal 52 No. two of second external port, single-pole double-throw switch S1 number 6, first external port 7, terminal 71 No. one of first external port, terminal 72 No. two of first external port, alternating-current ammeter 8, low-power factor power meter 9, "I" terminal 91, "U" terminal 92, "I" terminal 93 and "U" terminal 94, shell 10.

Detailed Description

As shown in fig. 1 to 6, a multifunctional measuring device for measuring ac impedance and iron loss comprises a housing 10, wherein an ac voltmeter 4, an ac ammeter 8, a low power factor power meter 9, a single-pole double-throw switch S2 and a single-pole double-throw switch S1 are arranged in the housing 10; the outer wall of the shell 10 is provided with a first external port 7 and a second external port 5; the single-pole double-throw switch S2 comprises an S2 iron loss branch and an S2 impedance branch, and the single-pole double-throw switch S1 comprises an S1 iron loss branch and an S1 impedance branch;

the alternating current voltmeter 4, the alternating current ammeter 8, the low-power factor power meter 9, the single-pole double-throw switch S2 and the single-pole double-throw switch S1 are connected through a lead to form a combined measuring loop;

when measuring alternating-current impedance, the first external port 7 is used for connecting the output end of the single-phase alternating-current voltage regulator, and the second external port 5 is used for connecting two ends of the reactance winding;

when measuring the iron loss, first external port 7 is used for connecting the secondary winding of the current transformer, and second external port 5 is used for connecting the two ends of the test voltage measuring coil.

The single-pole double-throw switch adopts a 3-pin 3-gear toggle switch, two gears of impedance and iron loss are set, the binding post adopts a universal pluggable binding post with the diameter of a jack of 4 mm, the universal pluggable binding post is matched with a test wire plug used on site, and a standard single-core insulated wire with the cross section of 2.5 square mm is adopted as a wire. The wires of the combined measuring circuit are arranged only inside the housing 10, and the ac voltmeter 4, the ac ammeter 8 and the low power factor wattmeter 9 are embedded in the housing. The first external port 7 and the second external port 5 are provided at the housing surface.

Further, the first external port 7 includes a first external port No. one terminal 71 and a first external port No. two terminal 72; the second external port 5 includes a second external port No. one terminal 51 and a second external port No. two terminal 52; the low power factor power meter 9 includes "I" terminal 91, "U" terminal 92, "I" terminal 93, and "U" terminal 94;

the first external port first terminal 71 is connected with the alternating current ammeter 8, the "I" terminal 91, the "U" terminal 92 and the second external port second terminal 52 in sequence through a lead;

the second external port terminal 72 is connected with the S1 iron loss branch, the S2 iron loss branch and the "I star" terminal 93 in sequence through wires;

the second external port No. two terminal 72 is connected with the S1 impedance branch, the second external port No. two terminal 52 and the "U" terminal 92 in turn through wires; an alternating current voltmeter 4 is connected in parallel to the second external port 5;

the second external port number one terminal 51 is connected to the "U star" terminal 94 by a wire.

Further, the housing 10 is an epoxy housing. The thickness is 3 mm, and size is 750 × 400 × 200mm, and the theory of operation is as follows:

1. AC impedance measurement

As shown in fig. 3-4, which are experimental principles and practical wiring diagrams. The output end of the single-phase alternating-current voltage regulator is connected with a first external port 7, the two ends of the reactance winding are connected with a second external port 5, the single-pole double-throw switch S1 and the single-pole double-throw switch S2 are all dialed to an impedance gear, namely an S1 impedance branch and an S2 impedance branch are conducted, so that the rotor alternating-current impedance test wiring is completed, and data measurement can be carried out according to test regulations.

2. Iron loss test

As shown in fig. 5-6, which are experimental principles and practical wiring diagrams. The test current transformer is wound for the second time to form a first external port 7, the two ends of the test voltage measuring coil are connected with a second external port 5, the single-pole double-throw switch S1 and the single-pole double-throw switch S2 are all dialed to an iron loss gear, namely an S1 iron loss branch and an S2 iron loss branch are conducted, so that iron loss test wiring is completed, and data measurement can be performed according to test regulations.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.

Claims

1. A multifunctional measuring device for measuring ac impedance and core loss, comprising a housing (10), characterized in that: an alternating current voltmeter (4), an alternating current ammeter (8), a low-power factor power meter (9), a single-pole double-throw switch S2 (3) and a single-pole double-throw switch S1 (6) are arranged in the shell (10); the outer wall of the shell (10) is provided with a first external port (7) and a second external port (5); the single-pole double-throw switch S2 (3) comprises an S2 iron loss branch and an S2 impedance branch, and the single-pole double-throw switch S1 (6) comprises an S1 iron loss branch and an S1 impedance branch;

the alternating current voltmeter (4), the alternating current ammeter (8), the low-power factor power meter (9), the single-pole double-throw switch S2 (3) and the single-pole double-throw switch S1 (6) are connected through a lead to form a combined measuring loop;

when measuring alternating-current impedance, a first external port (7) is used for connecting the output end of the single-phase alternating-current voltage regulator, and a second external port (5) is used for connecting two ends of a reactance winding;

when measuring the iron loss, the first external port (7) is used for connecting the secondary winding of the current transformer, and the second external port (5) is used for connecting the two ends of the test voltage measuring coil.

2. The multifunctional measuring device for measuring ac impedance and core loss according to claim 1, wherein: the first external port (7) comprises a first external port first number terminal (71) and a first external port second number terminal (72); the second external port (5) comprises a first external port terminal (51) and a second external port terminal (52); the low power factor power meter (9) comprises an 'I' terminal (91), a 'U' terminal (92), an 'I' terminal (93) and a 'U' terminal (94);

the first external port first terminal (71) is sequentially connected with an alternating current ammeter (8), an 'I' terminal (91), a 'U' terminal (92) and a second external port second terminal (52) through leads;

the second terminal (72) of the first external port is sequentially connected with the S1 iron loss branch, the S2 iron loss branch and the 'I' terminal (93) through leads;

the second external port terminal (72) is connected with the S1 impedance branch, the second external port terminal (52) and the 'U' terminal (92) in sequence through leads; an alternating current voltmeter (4) is connected in parallel on the second external port (5);

the second external port number one terminal (51) is connected with the 'U' terminal (94) through a wire.

3. The multifunctional measuring device for measuring ac impedance and core loss according to claim 1, wherein: the shell (10) is an epoxy resin shell.