JP3718874B2 - Load resistor for generator current test - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a load resistor used for an energization test of a generator, for example.
[0002]
[Prior art]
Conventionally, a water resistor using water as a resistor is generally known as a load resistor used for an energization test of a generator. However, the conventional water resistor has a problem that it requires a large amount of water and the size of the apparatus is increased, which requires time and effort for the test operation.
[0003]
In addition, the water used as a resistor during the test operation is circulated because it requires a large amount as described above, but since the water already used is mixed with many impurities, It must be filtered before use, and the equipment for that purpose has become complicated and expensive. Accordingly, the present inventor has developed a load resistor for a generator energization test that does not use water as a load resistor of the generator.
[0004]
[Problems to be solved by the invention]
Thus, the present invention was devised to solve the above-mentioned conventional problems, and provides a load resistor for a generator energization test that is inexpensive to manufacture, easy to handle for test operations, and excellent in safety. It is intended to do.
[0005]
[Means for Solving the Problems]
The present invention is a load resistor for electrical test used for electrical test of the high-pressure three-phase AC generator of 6600V or 3300V, the framework is angular frame (13) in a square shape,
A substantially cylindrical base body (1), and a plurality of protruding pieces (2...) That are attached to the base body (1) in the longitudinal direction of the outer periphery with a space therebetween and project outward in an annular shape from the outer periphery of the base body (1). ), A resistance material (3) installed inside the base (1), and an insulating member in the form of a powder filled between the resistance material (3) and the inner wall of the base (1) (4) interposed between the both end portions of the base body (1) and the connection terminals (5) disposed outside the both end portions of the base body (1) and connected to the resistance material (3). The base (1) has substantially the same outer shape, and has a convex fitting portion fitted into and attached to the inner walls of both ends of the base, and is approximately 1 cm in length in the longitudinal direction of the base (1). And an insulating member (6) made of Teflon (registered trademark) having a length,
The base end of the connection terminal (5) is connected to the resistance material (3) inside the base body (1), and the other end side is formed into a male screw shape, and the insulating member (6) Is screwed in the axial direction and exposed to the outside. A nut is screwed to the exposed portion and fixed to the insulating member (6), and a nut is further screwed to attach the connecting member (14). A resistor for load resistor (10...) Having a rated voltage of 400 V, a rated capacity of 1, 67 kW, and a dielectric strength of 2000 V / 1 minute provided with a portion,
A plurality of load resistors are attached in parallel at a predetermined interval, and adjacent connection terminals (5...) Of the plurality of load resistor resistors (10...) Are connected by the connection member (14). The resistor circuit (12) is formed by making it separable,
The body frame (11) having a substantially lateral feature shape by stacking a plurality of the resistor circuit (12 ...) with incorporated in the plurality of stages, in the resistor circuit vertically adjacent (12, 12) The load resistor unit (17) is formed by arranging the load resistor resistors (10) located above and below at positions where they do not overlap in the vertical direction,
The resistor circuits (12...) Stacked and incorporated in the plurality of stages connect the connection terminals (14) of the uppermost resistor circuit (12...), And the resistor circuits other than the uppermost stage. For (12...), The connection member (14) can be freely connected and disconnected to enable a load test of a 6600V or 3300V high-voltage three-phase AC generator with a capacity of 50 KW to 750 KW,
The loader unit (17) is erected on a mounting frame (27) via an insulator (28) and a vibration-proof rubber (25), and a cooling fan (24) is connected to the loader unit (17). The space from the cooling fan (24) to the lower side of the loader unit (17) can be blown from the lower side to the upper side. 17) A hood (26) having a narrowed shape toward the lower side was provided.
It is characterized by this.
[0006]
[Action]
The load resistor for a generator energization test according to the present invention is easy to manufacture and can be used for a test operation in a power generation test of a generator using the load resistor. Furthermore, since the insulation measures are sufficient, even if it is a test of a high voltage generator of 6600V or 3300V, the load test can be performed safely.
[0007]
【Example】
Embodiments according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a configuration of a load resistor resistor 10 used in a generator energization test load resistor constituting the present invention. In FIG. 1, reference numeral 1 denotes a substrate. The substrate 1 has a substantially cylindrical shape and is usually formed with a length of about 1 meter.
[0008]
In the longitudinal direction of the outer periphery of the base body 1, a plurality of projecting pieces 2... Projecting in a substantially annular shape to the outer periphery of the base body 1 are attached with an interval of about 7 mm. In addition, a resistance material 3 such as a heating wire is disposed inside the base body 1. The resistance material 3 is energized, and whether or not a generator or the like is normally generating power through the load resistor resistor 10. An energization test will be performed.
[0009]
The plurality of projecting pieces 2... Serve to dissipate heat generated when the resistance material 3 is energized. Here, both ends of the resistance material 3 are connected to connection terminals 5 and 5 provided on both ends of the base 1. In addition, between the resistance material 3 and the inner wall of the base body 1, an insulating member 4 configured in a substantially powder form is filled in order to insulate the resistance material 3 and the base body 1 to be energized.
[0010]
Further, as can be understood from FIG. 1, a Teflon (registered) having an outer shape substantially equivalent to that of the base 1 is formed between the connection terminals 5 and 5 connected to the resistance material 3 and both ends of the base 1. (Trademark) insulating member 6 is interposed. The length of the insulating member 6 made of Teflon (registered trademark) is preferably about 1 cm or more between the base 1 and the connection terminal 5.
[0011]
This is because, for example, when conducting an energization test of a 6600 V three-phase AC type high voltage generator, a voltage of at least 3819 V is applied per phase, and even if an intermediate potential is applied to the main body frame 11 described later, a resistor for a load resistor 10 is applied with a voltage of about 1910V, and therefore the load resistor resistor 10 must have a dielectric strength of 2000V. For this purpose, the connection terminal 5 and the substrate 1 must be securely connected. This is because it is required to be insulated.
[0012]
Therefore, a Teflon having an outer shape substantially equal to the outer shape of the base body 1 between the connection terminals 5 and 5 connected to the resistance material 3 and both ends of the base body 1 and having a length of about 1 centimeter. An insulating member 6 made of (registered trademark) is interposed. In the above, one use state of the present invention will be described. Here, as shown in FIGS. 2 and 3, for example, a plurality of load resistor resistors 10 (about 150) are installed and used.
[0013]
Each resistor 10 for load resistors is configured according to standards such as rated voltage 400V, rated capacity 1, 67KW, dielectric strength 2000V / 1 minute, etc., and a plurality of resistors 10 are used for testing 6600V or 3300V high voltage generators. To be used. In FIG. 3, reference numeral 11 denotes a main body frame framed in a substantially rectangular shape. The resistor circuit 12 shown in FIG. 2 is inserted into the main body frame 11 in a plurality of stages (for example, 15 stages in this embodiment) and stacked. Thus, the loader unit 17 is formed.
[0014]
In this embodiment, as is understood from FIG. 2, the resistor circuit 12 has, for example, 10 load resistor resistors 10... Attached and formed. The ten load resistor resistors 10... Are connected by a connecting member 14 so that the connecting terminals 5 and 5 are connected in series.
[0015]
Thus, one resistor circuit 12 has a capacity of 16, 7 kW. Further, as can be understood from FIG. 3, the resistor circuit 12 installed second from the top is an abbreviation of ten load resistor resistors 10 attached to the uppermost resistor circuit 12. Ten pieces are attached to the corner frames 13 located at intermediate positions, that is, alternately.
[0016]
This is because heat is generated at a considerably high temperature when an electric current is passed through each of the load resistor resistors 10... Therefore, in order to efficiently perform the cooling work by the cooling fan 24, the load resistor resistors 10 in the so-called plural resistor circuits 12... It is arranged to do.
[0017]
Further, the cooling fan 24 is attached to the attachment frame 27 via a vibration-proof rubber 25 below the loader unit 17 installed as shown in FIG. The wind is configured to efficiently hit the load resistor resistors 10. Further, reference numeral 28 denotes an insulator. Since the loader unit 17 is installed via the insulator 28, this apparatus ensures extremely high insulation.
[0018]
Here, for example, 15 stages of such resistor circuits 12 are installed as described above. Therefore, in this embodiment, for example, a generator having a capacity of about 50 KW to about 750 KW can be tested. That is, when testing a 50 KW generator, only the uppermost resistor circuit 12 may be used.
[0019]
In this way, when testing generators with different capacities, the first terminal 15 may be switched. That is, the input terminal 18 from the generator to be tested is connected to the first terminal plate 15, and the connection members 14 from the connection terminals 5 of the plurality of load resistor resistors 10. Connected.
[0020]
Therefore, if only the connection member 14 of the uppermost resistor circuit 12 is connected and the other connection member 14... Is disconnected, a capacity of about 16, 7 KW can be secured for one phase. A capacity of 50 KW can be secured. Reference numeral 16 denotes a second terminal, and the second terminal 16 is connected to each of the three-phase zero phases.
[0021]
By the way, the first terminal plate 15 and the second terminal plate 16 described above are installed at a location above the front surface in FIG. 3, but are not limited to this location, and are on the opposite side corresponding to the front surface. It may be installed at any location on the surface. 3, the input terminal 18 from the generator to be tested is connected to the first terminal plate 15, and a plurality of load resistor resistors 10... Connected from the connection terminal 5 are connected. The wires 19 are connected, and the second terminal board 16 is connected so as to be the three-phase zero phases, but these connections may be reversed.
[0022]
Thus, since the normal generator is used in the three-phase AC type, three loader units 17 described above are required. As described above, the high-voltage generator up to 6600 V can be tested as a whole for the three phases. FIG. 4 is an explanatory view showing a state in which the load resistor for generator energization test according to the present invention is mounted on the rear cargo bed of the truck 20.
[0023]
Here, in order to correspond to the generator of the three-phase AC power source, the load resistor 21 is configured by arranging three loader units 17... And an attachment frame provided on the loading platform 22 of the truck 20. 27 is attached via an anti-vibration rubber 25 and an insulator 28. Further, as described above, the large cooling fans 24 are respectively provided below the mounting frame 27 so as to eliminate the heat generated during the energization test.
[0024]
One load resistor 21 has a capacity of 750 kW, and in the embodiment shown in FIGS. 4 and 5, four load resistors 21 having the capacity are stacked, so that it has an overall capacity of 3000 KW. become. Furthermore, the code | symbol 30 is a loader unit for fine adjustment, and is comprised by the capacity | capacitance of about 200-300W. Reference numeral 31 is a transformer connected to the fine adjustment unit 30 for use.
[0025]
Therefore, in this embodiment, a 6600V or 3300V high voltage generator can be used to conduct energization tests with a capacity of 50 KW to a capacity of 3000 KW.
[0026]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a load resistor for a so-called dry type generator energization test that does not require any water at a low cost, and the test operation handling is simple and excellent in safety. A load resistor for machine energization test can be provided.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a schematic configuration of the present invention.
FIG. 2 is an explanatory diagram of a use state of the present invention (part 1).
FIG. 3 is an explanatory diagram of a use state of the present invention (part 2);
FIG. 4 is an explanatory diagram of a use state of the present invention (part 3);
FIG. 5 is an explanatory diagram of a use state of the present invention (No. 4).
FIG. 6 is an explanatory diagram for explaining a mounting state of a cooling fan.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base | substrate 2 Overhang | projection piece 3 Resistive material 4 Insulating member 5 Connection terminal 6 Insulating member 10 made of Teflon (registered trademark) 10 Resistor for load resistor 11 Body frame 12 Resistor circuit 13 Square frame 14 Connecting member 15 First terminal plate Second terminal board 17 Load unit 18 Input line 19 Connection line 20 Track 21 Load resistor 22 Loading base 24 Fan 25 Anti-vibration rubber 26 Hood 27 Mounting frame 28 Insulator 30 Fine adjustment loader unit 31 Transformer

Claims (1)

It is a load resistor for an energization test used for an energization test of a 6600V or 3300V high-voltage three-phase AC generator,
In the square frame (13) framed in a square shape ,
A substantially cylindrical base body (1), and a plurality of protruding pieces (2...) That are attached to the base body (1) in the longitudinal direction of the outer periphery with a space therebetween and project outward in an annular shape from the outer periphery of the base body (1). ), A resistance material (3) installed inside the base (1), and an insulating member in the form of a powder filled between the resistance material (3) and the inner wall of the base (1) (4) interposed between the both end portions of the base body (1) and the connection terminals (5) disposed outside the both end portions of the base body (1) and connected to the resistance material (3). The base (1) has substantially the same outer shape, and has a convex fitting portion fitted into and attached to the inner walls of both ends of the base, and is approximately 1 cm in length in the longitudinal direction of the base (1). And an insulating member (6) made of Teflon (registered trademark) having a length,
The base end of the connection terminal (5) is connected to the resistance material (3) inside the base body (1), and the other end side is formed into a male screw shape, and the insulating member (6) Is screwed in the axial direction and exposed to the outside. A nut is screwed to the exposed portion and fixed to the insulating member (6), and a nut is further screwed to attach the connecting member (14). A resistor for load resistor (10...) Having a rated voltage of 400 V, a rated capacity of 1, 67 kW, and a dielectric strength of 2000 V / 1 minute provided with a portion,
A plurality of load resistors are attached in parallel at a predetermined interval, and adjacent connection terminals (5...) Of the plurality of load resistor resistors (10...) Are connected by the connection member (14). The resistor circuit (12) is formed by making it separable,
The body frame (11) having a substantially lateral feature shape by stacking a plurality of the resistor circuit (12 ...) with incorporated in the plurality of stages, in the resistor circuit vertically adjacent (12, 12) The load resistor unit (17) is formed by arranging the load resistor resistors (10) located above and below at positions where they do not overlap in the vertical direction,
The resistor circuits (12...) Stacked and incorporated in the plurality of stages connect the connection terminals (14) of the uppermost resistor circuit (12...), And the resistor circuits other than the uppermost stage. For (12...), The connection member (14) can be freely connected and disconnected to enable a load test of a 6600V or 3300V high-voltage three-phase AC generator with a capacity of 50 KW to 750 KW,
The loader unit (17) is erected on a mounting frame (27) via an insulator (28) and a vibration-proof rubber (25), and a cooling fan (24) is connected to the loader unit (17). The space from the cooling fan (24) to the lower side of the loader unit (17) can be blown from the lower side to the upper side. 17) A hood (26) having a narrowed shape toward the lower side was provided.
A load resistor for a generator energization test.

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