JP3155407B2 - Switchable test equipment for private generators - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

[0001] The present invention relates to a test apparatus for a private power generator which is installed in a high-rise building or the like to test the performance of a private power generator installed in order to cope with an emergency such as a power outage in advance, and to confirm its normal operation. is there.

Here, there are high-voltage large-capacity, high-voltage small-capacity, low-voltage large-capacity and low-voltage small-capacity generators.
A generator with a capacity of 800 V or more and a voltage of 800 V or more is indicated as a high-voltage large-capacity generator. A generator with a capacity of 700 V or more and a capacity of 500 KW or less, such as a voltage of 6, 6 KV, or 3, 3 KV, is a high-voltage small-capacity generator. Is indexed.

A generator having a voltage of less than 700 V such as 415 V or 200 V and having a capacity of 800 KW or more is indicated as a low-voltage large-capacity generator. A generator having a voltage of less than 700 V such as 415 V or 200 V and having a capacity of 500 KW or less is low. It is indexed as a small voltage generator.

[0004]

2. Description of the Related Art Initially, as shown in FIG. 16, a resistance test apparatus for a private power generator flows resistance water 72 at about 20 ° C. A pair of electrode plates 73 projecting in the direction and held movably up and down.
, And in this state, the power generated from the private generator is passed between the electrode plates 73... For a required time, and the performance of the private generator, such as power generation capability or durability, is tested.
I was checking.

Here, as an example of a test operation using this type of test apparatus, an output of 1000 KVA, a power factor of 0.8,
A low-voltage small-capacity type private power generator with a voltage of 415 V and a capacity of 800 kW is operated, and the electrode plate 73 in the current tank 71.
When current is supplied between the terminals, a current of about 642.6 A always flows.

This energizing operation is continued for, for example, about three hours,
If there is no abnormality in the performance of the private generator, it can be determined that the generator has a predetermined power generation capacity and durability.

[0007] However, the resistance water 72
The temperature rises due to the energization as described above, and at about 80 ° C. during overflow drainage from the drain port 75 as shown in the figure.
It will be about.

By the way, the electrode plate 73 in the resistance water 72
..The degree of energization between the resistance water 72 in the energization tank 71
Is significantly affected by the rise or fall of the temperature or the degree of impurity contamination in the resistance water 72. Therefore, test conditions set in advance, for example, an output of 1000 KVA and a power factor of 0.
8, the condition that the private power generator with the voltage of 415 V and 642.6 A is operated and the current is supplied between the electrode plates 73...
A situation occurs in which a current of 2.6 A or more flows.

For this reason, the generator and the engine may be overloaded. Therefore, in the conventional test equipment,
The electrode plates 73 are moved up and down so that a current of 642.6 A or more does not flow.
2 to adjust the current-carrying area of the electrode plate 73,
4 to supply the low-temperature resistance water 72 to suppress the rise in the temperature of the resistance water 72 in the current tank 71 (because the rise in the water temperature causes an excessive current flow).

However, in the above-mentioned conventional test apparatus,
The device becomes large in size, which is extremely inconvenient to transport and takes too much time to prepare for installation of the device. Further, it is difficult to move the electrode plate 73 up and down, and precise adjustment cannot be expected.

Further, as a serious problem, it is necessary to continuously replenish the resistance water 72 continuously, and it is necessary to promptly discard the used resistance water 72, which requires a large amount of water. In addition to being extremely uneconomical, the used resistance water 72 had to be drained and the working environment was extremely poor.

In order to solve the above-mentioned problems, the present inventor can reduce the size of the apparatus and can test a private generator installed at any place. It has been proposed that a test device which can prevent an abnormal rise of the electric power by a simple operation, and can test an extremely safe and economical private power generator without wasting resistance water.

Here, as a patent application filed by the inventor for the above-described test apparatus first invented, Japanese Patent Application No. 62-204866 (Japanese Patent Application Laid-Open No. 64-479)
No. 76), Japanese Patent Application No. 1-202554 (Japanese Unexamined Patent Application Publication No.
No. 451), Japanese Patent Application No. 2-82183 (Japanese Patent Application Laid-Open No. 3-68)
No. 106), Japanese Patent Application No. 2-89754 (Japanese Patent Application Laid-Open No. 3-28)
No. 7085), Japanese Patent Application No. 2-89755 (Japanese Unexamined Patent Application Publication No.
87086), Japanese Patent Application No. 2-249798 (Japanese Unexamined Patent Application Publication No.
-127502), Japanese Patent Application No. 3-76270 (JP-A-5-264679), Japanese Patent Application No. 3-100180 (JP-A-4-329383) and the like.

FIG. 15 shows a schematic configuration of these inventions. That is, the test apparatus invented by the inventor for the first time includes an energizing tank 81 in which a resistance liquid 86 is filled,
A base end portion is fixed at the upper part of the energization tank 81, and is inserted into the energization tank 81 in a hanging state from the base end portion toward the distal end side, immersed in the resistance liquid 86, and An electrode 82 that is energized by receiving power from a private generator, and an electrode 8 that is disposed in the energization tank 81 and
A movable insulator 83 for making the amount of current flowing variable, and a radiator 8 for cooling the resistance liquid 86 in the current tank 81.
And a fan 85 for forcibly sending air to the surface (water is sprayed from the spray pipe) of the surface 4.

As a result, a test apparatus for a private generator that can accurately perform a load test on a generator or the like with a simple structure and does not require a large amount of water continuously has been provided. However, the inventor has subsequently invented a test apparatus according to the second invention in which a so-called metal body is used as a resistance member, which does not require any water for resistance.

In addition, high voltage and large capacity (as described above, as a temporary reference, a voltage of 700 V or more and a capacity of 800K
W, high voltage and small capacity (as described above, a voltage of 700 V or more and a capacity of 500 KW or less), and a low voltage and large capacity (as described above, Water that can be used for all generators of less than 700 V and capacity of 800 KW or more and low-voltage small capacity type (for a tentative standard, voltage of less than 700 V and capacity of 500 KW or less) They invented a dry-type testing machine that did not need it (Japanese Patent Application No. 4-2123).
No. 5: JP-A-5-215825, Japanese Patent Application No. 4-1940
No. 32: JP-A-6-34725).

This is because a generator for private use is sometimes installed in a remote area in a mountainous area, which is a depopulated area, and it is extremely difficult to sufficiently supply a large amount of water to such an area.
Also, when it is necessary to test a private generator installed in a snowy country where a large amount of snow falls, it is extremely difficult to supply a large amount of water during the test.

Further, here, the background of the invention was described. Conventionally, a voltage of 6,6 KV,
In order to manufacture a tester for testing a high-voltage large-capacity generator with a capacity of about 2000 kW, particularly a dry-type tester, the configuration is extremely large because a loader is manufactured using a metal body to be a resistor. In addition, it is difficult to provide a fine adjustment mechanism for setting the reference load value, and it has been very difficult to manufacture the reference load value.

A low-voltage large-capacity type having a voltage of 200 V and a capacity of about 2,000 kW, a voltage of 415 V and a capacity of 2000
Low-voltage large-capacity type of about KW, high-voltage large-capacity type of voltage of about 3,3 KV, capacity of about 2000 KW, or voltage of 2
For a tester for testing a low-voltage small-capacity type of 00 V and a capacity of about 500 W, a low-voltage small-capacity type of a voltage of 415 V and a capacity of about 500 W, and a high-voltage small-capacity type of a voltage of about 3.3 KV and a capacity of about 500 W, Test machines of the dry type had to be separately manufactured so as to correspond to the above-mentioned generators, which was extremely expensive.

Thus, to solve such a problem, the second invention has been made. But,
This invention also has various problems.

That is, the inventor of the present invention has invented a transformer and a low-voltage small-capacity variable capacity loader connected to the transformer and capable of adjusting a load value (capacity value, amount of current) in a stepwise manner.
Although the transformer and the variable capacity loader, particularly the transformer, are extremely heavy, it is extremely difficult to transport the transformer and the variable capacity loader to remote areas in the mountains, which are depopulated areas. there were.

Further, since the load value can be adjusted only stepwise (normally four steps) as described above, a movable insulator is provided to finely adjust the load value, and the load value can be adjusted steplessly. There is a problem that a water resistor that can be adjusted is preferable.

[0023]

Thus, a switching test apparatus for a private generator according to the present invention has been devised in order to solve the problem of the invention of a test apparatus made by the inventor of the present invention. The total weight can be reduced, the manufacturing cost can be reduced, and the generator of any type of high voltage large capacity, high voltage small capacity, low voltage large capacity, low voltage small capacity is one test equipment The test can be performed easily, accurately, and quickly, and the fine adjustment of the capacity value can be performed reliably. The amount of liquid for resistance is about 4 minutes compared to the conventional tester consisting only of a water loader. It is an object of the present invention to provide a private generator switchable test device that can be reduced to one.

[0024]

Means for Solving the Problems In order to achieve the above object, a switching test apparatus for a private generator according to the present invention is configured as follows.

That is, the switching test apparatus for a private power generator according to the present invention comprises a current-carrying tank 1 filled with a resistance liquid 10.
2, a main electrode 14 that is arranged in the power supply tank 12 and receives power from a private generator to be tested;

A movable insulator 16 that is interposed between the main electrode 14 and the current supply tank 12 and adjusts the amount of current supplied from the main electrode 14 to the current supply tank 12, and cools or filters the resistance liquid 10 in the current supply tank 12. Piping system 1 for returning to the electric tank 12
8 and

An introduction pipe 2 connected to a piping system 18 above the energizing tank 12 and for feeding the resistance liquid 10 into the energizing tank 12.
0, and the introduction pipe 20 also serves as a holding member that holds the main electrode 14 by suspending the main electrode 14 from above the energizing tank 12, and a power transmission member that transmits power from the private generator to the main electrode 14. Is also used,

The main electrode 14 is a small-capacity water loader of 500 KW or less, which can be selected and exchanged for either low voltage or high voltage in accordance with the standard voltage of the private generator to be tested. A connection terminal 15 provided on the water loader 36;

The connection terminals 17-1, 17-2, 17-
3,... 17-n, together with the water loader 36,
A plurality of fixed loads 19-1, 19-2,
19-3,... 19-n,

The fixed loaders 19-1, 19-2, 19
-3,..., 19-n are three-phase star-connected circuits 4 formed by combining and connecting a plurality of resistors in each phase.
1, a load main body 23 to which the output voltage of the generator 1 is applied;

A switch 24 for switching the connection of the resistor in the circuit 41 in accordance with the operation so that the withstand voltage of the circuit 41 corresponds to the output voltage of the generator 1;

The fixed electrodes 19-1 and 19-1 are replaced by replacing the main electrode 14 and the switch 24 of the circuit 41.
9-2, 19-3,..., 19-n, the resistance is adjusted by switching the connection of the plurality of resistors in parallel and in series or in parallel or in series to adjust the resistance value.
The water load 36 and the fixed loads 19-1, 19-2, 19-3,..., 19-n can be used for low-voltage generators of less than V or high-voltage generators of 700 V or more. By switching the connection and adjusting the number of loaders connected in parallel, a small capacity type of 500KW or less or 800KW
Performing a power generation test by adjusting the capacity of a load applied without using a transformer by moving the movable insulator 16 of the water loader 36 in a stepless manner so as to be applicable to a large capacity type generator test of W or more. It is configured as possible.

[0033]

According to the present invention, a small-capacity water loader 36, connection terminals 15 provided on the water loader 36, and connection terminals 17-1, 17-2, 17-3,. -N and a plurality of fixed loaders 19-1, 19-2, 19-3, ... 19- connected in parallel with the water loader 36.
n and

The fixed loaders 19-1 and 19-
, 19-n include a circuit 41 connected and configured by combining a plurality of resistors, and a load main body 23 to which an output voltage of the generator 1 is applied;

A switch 24 for switching the connection of the resistor in the circuit 41 in accordance with the operation so that the withstand voltage of the circuit 41 corresponds to the output voltage of the generator 1; Replacement, and fixed loaders 19-1, 19-2,
By switching the connection of the resistor of the circuit 41 in the switch 24 in 19-3,... 19-n, it is possible to cope with a low-voltage or high-voltage generator test.

The water loader 36 and the fixed loader 19-
1, 19-2, 19-3,..., 19-n can be switched to a small-capacity or large-capacity generator test, thereby providing high-voltage large-capacity, high-voltage small-capacity, low-voltage A load test can be smoothly performed on any of the large-capacity and low-voltage small-capacity generators.

Further, compared with the conventional case, since no transformer is used, the total weight of the tester can be reduced. Further, a small amount of resistance liquid 10 (water) to be used is required.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows the overall configuration of the embodiment. Reference numeral 30 denotes a private generator to be tested.

The generator 30 is connected to the switching type test apparatus 32 according to the present embodiment. Here, the switching type test apparatus 32 is connected via a connection terminal 33 and is a small capacity (for example, 500 KW) water loader 36 with which the low voltage type or the high voltage type main electrode 14 can be replaced, and a connection. A plurality of high-voltage small-capacity types (e.g., 6, 6 KV, 500K) connected via terminals 40-1, 40-2, 40-3
W) fixed loads 42-1, 42-2, 42-3, and fans 44-2, 44-3, 44-4 adjacent to these loads 42-1, 42-2, 42-3. It is constituted by.

The water load 36 and the three fixed loads 42-1, 42-2, 42-3 are connected to the connection terminals 33 and 4 respectively.
It is connected in parallel to the generator 30 via 0-1, 40-2, 40-3.

Here, first, the configuration of the water loader 36 will be described with reference to FIG. Reference numeral 26 denotes a communication tank, and four current tank units 28 are provided above the communication tank 26.

This is because a commonly used generator is a three-phase alternating current type, and accordingly, a current tank unit 28
And three are reserved. Then, during normal use when not in use, the resistance liquid 10 is also sent into this one unit,
Thus, the water temperature of the resistance liquid 10 in the energization tank unit 28 is finely adjusted.

The energizing tank unit 28 includes a substantially cylindrical energizing tank 12 provided above the communication tank 26, the main electrode 14 suspended in the energizing tank 12, and the energizing tank 1.
2 and a movable insulator 16 interposed between the main electrodes 14, and each energization tank 12 is filled with a resistance liquid 10.

Here, an introduction pipe 20 whose outer periphery is covered with an insulating material 24 such as Teflon is provided extending from above in each of the energizing tanks 12, and a leading end portion of the introduction pipe 20 is mainly provided. The electrode 14 is detachably mounted.

The introduction tube 20 also serves as a power transmitting member for transmitting power from a generator 30 to be tested to a main electrode 14 to be described later, and also serves as a holding member for suspending and holding the main electrode 14 from above. ing.

Here, the substantially cylindrical movable insulator 16 interposed between the energizing tank 12 and the main electrode 14 is supported by an elevating device 38 and can be moved up and down. The communication tank 26 has a function of collecting the resistance liquid 10 in each of the energizing tanks 12... Mounted thereon and sending it to the radiator 32.

Further, the communication tank 26 is connected to the current-carrying tank 1 during operation.
2) has a function of introducing the air generated in the inside into the inside, moving the air to a spare power supply tank 12 that is not operating, and bleeding the air there.

That is, when a large amount of air is mixed in the energizing tank 12, energization causes an arc, which adversely affects the load balance and makes it impossible to perform an accurate test.

A tank 40 is provided above the energizing tank 12, and the tank 40 is connected to each of the introduction pipes 20 by a withstand voltage and contact-resistant flexible hose 42. Tank 40
Is provided with an introduction main pipe 21 for supplying the resistance liquid 10, and between the tank 40 and the flexible hose 42, a flow adjustment valve 22 for adjusting the flow rate of the resistance liquid 10 flowing to the introduction pipe 20 is attached. Have been.

A drain pipe 44 for discharging the resistance liquid 10 is attached to the communication tank 26 below the energizing tank 12, and a pump 46 is attached to the drain pipe 44.

The drain pipe 44 is connected to the radiator 32, and the outlet main pipe 21 is connected to the outlet side of the radiator 32. Further, the drain pipe 44 and the introduction main pipe 21 are also connected to a filtration device 48, and the resistance liquid 10 may be filtered by the filtration device 44 without passing through the radiator 32.

As shown in FIG. 4, a connection terminal bar 36 is attached to the upper end of the introduction pipe 20 via an insulating insulator 34, and the connection terminal bar 36 and the terminals on the side of the power supply tank 12 (shown in FIG. 4). The cable on the private generator side to be tested is connected to (z). 5 and 6 show the main electrode 14.
Is shown.

FIG. 5 shows a substantially cylindrical main electrode 14a, which is used for testing a low voltage generator of 200 to 400V. FIG. 6 shows an elongated cylindrical main electrode 14b having an oval vertical cross section, which is used for testing a high voltage generator of 3300 to 6600V.

The main electrodes 14a and 14b are detachably connected to the introduction pipe 20 via flanges and the like, and can be easily selected and replaced according to the standard voltage of the generator. Next, the configuration of the fixed loads 42-1, 42-2, 42-3 will be described. First, as shown in FIGS. 7 and 8, the fixed loaders 42-1 and 42-2 or 42-3 are connected to the circuit 6
0... Are included.

The circuits 60 are connected in a star connection. For example, in a fixed load having a voltage of 6, 6 KV, the inter-phase voltage between the terminals u- ₀ is 3 as shown in FIG.
815V.

The circuit 60 is constructed by connecting a plurality of resistors 64... As shown in FIG. In the above, the fixed loaders 42-1 and 42-
2, or 42-3 at a voltage of 6, 6 KV, a plurality of resistors 64... In a circuit 60 are combined and connected as shown in FIGS. The terminals are connected to u, v, and w terminals, respectively.

When the fixed loaders 42-1, 42-2 or 42-3 are used at 3.3 KV, FIG.
1, a plurality of resistors 64 in the circuit 60 as shown in FIG.
... to combine connection and a neutral point of the star connection terminals of u ₀ to (so-called zero point) may be connected to terminal u 'to the connection terminal from the power source.

When it is desired to use the fixed loader 42 at a voltage of 415 V, a plurality of resistors 64 are short-circuited by a bar 66 or a cable as shown in FIG. May be connected to the connection terminal from the power supply.

When it is desired to use the fixed loader 42 at a voltage of 200 V, the bar 66 is brought into the state shown in FIG.
Alternatively, a plurality of resistors 64... May be short-circuited by a cable or the like, and terminals u ′, v ′, and w ′ may be connected to connection terminals from a power supply.

As described above, in the present embodiment, the connection of the plurality of resistors 64... In the circuit 60 can be easily changed in accordance with the operation, whereby the voltage of the fixed loader 42 can be quickly changed. Can be changed reliably.

Therefore, the fixed loads 42-1, 42-2,
The voltage value can be easily changed without placing a heavy transformer next to each of 42-3. In the above, the test operation according to the present embodiment will be described. First, in the case where the generator to be tested is a high voltage type of 6.6 KV and a large capacity type generator of 2000 kW, the test apparatus is a small capacity type water generator. Loader 36 (capacity 500KW,
The main electrode 14a is used for a low voltage. ) Is one and three fixed loads 42-1, 42-2, 42
-3 (capacity: 500 KW, voltage: 6, 6 KV) are connected in parallel.

At this time, the fixed loaders 42-1 and 42-
Since the voltages of 2, 42-3 are preset to 6, 6 KV, there is no need to switch the combination connection of the resistors 64... In the circuit 60.

Here, the test of the generator is performed by a so-called load test and a governor test. In the present embodiment, first, in this embodiment, a load of 500 KW at a voltage of 6, 6 KV is applied to the generator. Take 10 minutes, then add 500 KW, apply a total load of 1000 KW for about 10 minutes, add 500 KW, and add 1500 KW
Means that a load test is performed for about 10 minutes, and finally a load of 500 KW is added to the load of 2000 KW for about 3 to 4 hours.

The first 500 KW load test is performed by connecting the connection terminal 40-1 of the fixed loader 42-1 connected to the second stage to the generator 30, as understood from FIG. Then, the load test at the next 1000 kW was performed with the fixed loader 42-1 and the fixed loader 4 in the third stage.
This is performed by connecting the 2-2 connection terminals 40-1 and 40-2 to the generator 30.

Further, in the load test of 1500 KW, the connection terminal 40-3 of the fixed loader 42-3 connected to the fourth stage is used.
Is connected to the generator 30.

However, especially in the case of the generator 30 using a diesel engine, the last 2000
The load of KW cannot be applied at a stretch, and the load of 500KW cannot be applied at a stretch.
W must be the load.

Therefore, the small-capacity water loader 36 connected to the first stage is connected to the generator 30 via the connection terminal 33, and the movable insulator 16 provided on the water loader 36 is operated. (Generally, the movable insulator 16 is raised,
The energized area between the main electrode 14 and the energizing tank 12 is increased. ), Gradually increase the load value, and finally 200
A load of 0 kW is applied for 3 to 4 hours.

Next, the governor test will be described. The governor test is a test for turning on and off the load, and it is possible to find out abnormal operation of the prime mover and the generator.

For example, the generator to be tested is of a high voltage type of 6,6 KV, and has a capacity of 1 kW instead of 2000 KW.
In the case of a generator 30 of a capacity type of 000 KW, the test apparatus is a water loader 36 of a small capacity type (capacity 500 KW).
W) and one fixed loader 42 (capacity 500K)
W, voltage 6, 6 KV) are connected in parallel.

In this case, in the governor test, 250
On / off with KW load, on / off with 500KW load,
Off, on / off at a load of 750 KW, and on / off at a load of 1000 KW are performed. Here, when a load of 250 KW is turned on and off, a small-capacity water loader 36 connected to the first stage is connected to the generator 30 through a connection terminal 33, and a movable insulator provided on the water loader 36 is provided. 16 is operated to set the load value to 250 KW, and in this state, the on / off operation is performed.

The small capacity water loader 36 is turned on and off at a load of 500 KW by operating the movable insulator 16 provided on the water loader 36 so that a load of 500 KW can be applied. Set and turn on / off in that state. 75
The on / off operation at a load of 0 KW is performed by the fixed loader 42 (capacity: 500 KW, voltage: 6, 6 KV) connected in parallel with the water loader 3 adjusted to a load value of 250 KW by the movable insulator 16.
6 is performed.

Finally, the load of 1000 KW is turned on and off by the fixed loader 42-1 (capacity 500KW, voltage 6, 6K).
V) and the water loader 36 adjusted to a maximum capacity of 500 KW by the movable insulator 16. Next, a test in the case where the generator to be tested is a high voltage type of 3.3 KV and a large capacity type generator of 2000 KW will be described.

Also in this case, the test apparatus has one small-capacity type water loader 36 (capacity 500 kW) and three fixed loaders 42 (capacity 500 kW, voltage 6,
6KV) are connected in parallel. At this time, since the voltages of the fixed loaders 42-1, 42-2, and 42-3 are set to 6, 6 KV in advance, it is necessary to switch the combination connection of the resistors 64 in the circuit 60. .

That is, the connection of the resistors 64...
1. Switching as shown in FIG.
The voltages of -1, 42-2 and 42-3 are set to 3.3 KV. Thus, this switching can be set to the state of the voltage of 3, 3 KV by switching from the state of the voltage of 6, 6 KV to the state of FIG. In this state, a load test is performed.

That is, 500 KW at a voltage of 3.3 KV
Load on the generator for 10 minutes, then 500KW
And a load of 1000 KW is applied for about 10 minutes, and a total of 1500 KW is added by adding 500 KW.
Apply KW load for about 10 minutes, and finally 500KW
In addition, the load test is performed by applying a load of 2000 KW for about 3 to 4 hours.

Here, in the first 500 KW load test, as can be understood from FIG. 2, the connection terminal 40-1 of the fixed loader 42-1 set to the voltage of 3, 3 KV, which is connected to the second stage, is connected. The next 1000 kW load test is carried out by connecting to the generator 30.
2-1 and the connection terminals 40-1 and 40-2 of the fixed loader 42-2 set to the third-stage voltage 3 and 3 KV, respectively.
This is done by connecting to 0.

Further, the 1500 KW load test is performed by connecting the connection terminal 40-3 of the fixed loader 42-3 set to the voltage of 3, 3KV, which is connected to the fourth stage, to the generator 30. In the final loading of 2000 KW, a load of 500 KW cannot be supplied at a stretch, but the load is gradually increased to finally a load of 2000 KW.

For this reason, the small capacity water loader 36 connected to the first stage is connected to the generator 30 via the connection terminal 33, and the movable insulator 16 provided on the water loader 36 is operated. And gradually increase the load value, and finally 2000KW
The load is applied for 3 to 4 hours.

At this time, the withstand voltage of the water loader 36 is changed from 415 V to 3.3 KV by changing the main electrode from 14a to 14b. Next, the governor test will be described. The generator to be tested is of a high voltage type of 3.3 KV, and a generator 30 of a capacity type of 1000 KW.

In this case, the test apparatus includes one small-capacity type water loader 36 (capacity: 500 kW) and the internal circuit 6.
One fixed loader 42 (capacity: 500 KW, voltage: 3, 3 KV) in which connection of the voltage of 0 is switched to 3, 3 KV is connected in parallel.

Here, the voltage of the fixed loader 42 is set to 6, 6K
The switching operation from V to 3, 3 KV is as described above.

In this case, in the governor test, 250
On / off with KW load, on / off with 500KW load,
Off, on / off at a load of 750 KW, and on / off at a load of 1000 KW are performed.

Here, when a load of 250 KW was turned on and off, a small-capacity water loader 36 connected to the first stage was connected to the generator 30 through a connection terminal 33 and provided on the water loader 36. The load value is set to 250 KW by operating the movable insulator 16 and turning on and off is performed in that state.

The small capacity water loader 36 is turned on and off at a load of 500 KW by operating the movable insulator 16 provided on the water loader 36 so that a load of 500 KW can be applied. Set and turn on / off in that state.

The on / off operation under the load of 750 kW is performed by connecting the fixed loader 42 (capacity 500 kW, voltage 3, 3) connected in parallel.
KV) and the water loader 36 adjusted to a load value of 250 KW by the movable insulator 16.

Finally, the load of 1000 KW is turned on and off by the fixed loader 42-1 (capacity 500KW, voltage 3, 3K).
V) and the water loader 36 adjusted to a maximum load of 500 KW by the movable insulator 16.

Here, the generator to be further tested is 200
A case of a low-voltage type V generator and a large-capacity 2000 KW type generator will be described.

Also in this case, the test apparatus has one small capacity type water loader 36 (capacity 500 kW) and three fixed loaders 42-1, 42-2, 42-3 (capacity 5).
00KW, the voltage becomes 200 V by switching).

At this time, each of the fixed loaders 42-1 and 42-
Since the voltages of 2, 42-3 are set to 6, 6 KV, it is necessary to switch the combination connection of the resistors 64...

That is, the connection of the resistors 64...
As shown in FIG. 4, by short-circuiting and connecting with the bar 66, each voltage of each of the fixed loads 42-1, 42-2, and 42-3 can be set to 200V.

As described above, each of the fixed loaders 42-1 and 42-
A load test is performed after setting each voltage of 2, 42-3 to 200V.

That is, a load of 500 KW is applied to the generator at a voltage of 200 V for 10 minutes, then a load of 1000 KW is added for about 10 minutes by adding 500 KW, and a total of 1500 KW is added by adding 500 KW.
A load test is performed by applying a load of W for about 10 minutes, and finally adding a load of 500 KW and a load of 2000 KW for about 3 to 4 hours.

The first 500 KW load test is performed by connecting the connection terminal 40-1 of the fixed loader 42-1 connected to the second stage to the generator 30, as understood from FIG. Then, the load test of the next 1000 kW was performed with the fixed loader 42-1 and the fixed loader 42 in the third stage.
-2 connection terminals 40-1 and 40-2 are connected to the generator 30.

Further, in the 1500 KW load test, the connection terminal 40-3 of the fixed loader 42-3 connected to the fourth stage was used.
Is connected to the generator 30.

In the final loading of 2000 KW, a load of 500 KW cannot be applied at a stretch, but the load is gradually increased to finally a load of 2000 KW.

For this purpose, the small-capacity water loader 36 connected to the first stage is connected to the generator 30 via the connection terminal 33, and the movable insulator 16 provided on the water loader 36 is operated. And gradually increase the load value, and finally 2000KW
The load is applied for 3 to 4 hours.

Next, the governor test will be described. The generator to be tested is of the low voltage type of 200V, 1000
The generator 30 has a capacity of KW.

In this case, the test apparatus includes one small-capacity type water loader 36 (capacity: 500 kW) and the internal circuit 6.
One fixed loader 42 (capacity 500 kW, voltage 200 V) in which the voltage of 0 is switched to 200 V is connected in parallel.

In this case, in the governor test, 250
On / off with KW load, on / off with 500KW load,
Off, on / off at a load of 750 KW, and on / off at a load of 1000 KW are performed.

Here, when a load of 250 KW was turned on and off, a small-capacity water loader 36 connected to the first stage was connected to the generator 30 through a connection terminal 33 and provided on the water loader 36. The load value is set to 250 KW by operating the movable insulator 16 and turning on and off is performed in that state.

Further, the on / off operation at a load of 500 KW is performed by operating the small capacity type water loader 36 with the movable insulator 16 provided on the water loader 36 so that a load of 500 KW can be applied. Set and turn on / off in that state.

When a load of 750 KW is turned on and off, a fixed load 42-1 (capacity of 500 KW, voltage of 2) is connected in parallel.
00V) and the water loader 36 adjusted by the movable insulator 16 to a load value of 250 KW.

Finally, the load of 1000 kW is turned on and off by the fixed loader 42-1 (capacity 500 kW, voltage 200
V) and the water loader 36 adjusted to a maximum load of 500 KW by the movable insulator 16.

As described above, even in this type of test, it is necessary to adjust the load to be applied, so that the importance of the water loader 36 having the movable insulator 16 becomes extremely large.

At the time of the test, the temperatures of the water loader 36 and the fixed loaders 42-1, 42-2, 42-3 rise, so that the adjacent fans 41-2, 41-3, 41- It is important to cool by 4.

Furthermore, since these test machines must be frequently transported, they are to be installed in advance on the bed of a vehicle.

As described above, the high-voltage large-capacity type (voltage 6,
6KV or 3,3KV, capacity 1000KW or 2000KW), high voltage small capacity type (voltage 6,6KV)
Alternatively, a capacity of 500 KW at 3, 3 KV, and a low voltage large capacity type (capacity 1000 at a voltage of 415 V or 200 V)
Testing of generators such as KW or 2000 KW) or small capacity type (voltage 415 V or 200 V and capacity 500 KW) can be performed by selecting one of various loaders in the testing machine in this embodiment. All are safe, quick and accurate, and the total weight of the tester can be reduced, and the amount of water can be reduced to perform a smooth load test.

[0108]

As described above, according to the present invention, the total weight of the apparatus can be reduced, the manufacturing cost can be reduced, and the high-voltage large capacity, high-voltage small capacity, low-voltage large capacity, Any type of low-voltage, small-capacity generator can be tested simply, accurately and quickly with a single test apparatus, and fine adjustment of the capacity value during the test can be performed reliably.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is an explanatory diagram illustrating a configuration of an embodiment.

FIG. 3 is a schematic explanatory diagram (part 1) illustrating a configuration of a water loader.

FIG. 4 is a schematic explanatory diagram (part 2) illustrating a configuration of a water loader.

FIG. 5 is an explanatory diagram (part 1) illustrating a configuration of a main electrode.

FIG. 6 is an explanatory diagram (part 2) illustrating a configuration of a main electrode.

FIG. 7 is a schematic explanatory view showing the configuration of a fixed loader (part 1).
It is.

FIG. 8 is a schematic explanatory view showing the configuration of a fixed loader (part 2).
It is.

FIG. 9 is an explanatory diagram showing a configuration of a plurality of resistors.

FIG. 10 is a schematic configuration diagram of a fixed loader set to a voltage of 6, 6 KV.

FIG. 11 is a schematic configuration diagram of a fixed loader set to voltages of 3, 3 KV (part 1).

FIG. 12 is a schematic configuration diagram of a fixed loader set to voltages of 3, 3 KV (part 1).

FIG. 13 is a schematic configuration diagram of a fixed loader set to a voltage of 415V.

FIG. 14 is a schematic configuration diagram of a fixed loader set to a voltage of 200V.

FIG. 15 is a schematic configuration diagram showing a conventional load device (part 1).
It is.

FIG. 16 is a schematic configuration diagram showing a conventional load device (part 2).
It is.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Generator 10 Resistance liquid 12 Current tank 14 Main electrode 15 Connection terminal 16 Movable insulator 17-1, 17-2, 17-3, ... 17-n Connection terminal 18 Piping system 19-1, 19-2 , 19-3,... 19-n Fixed loader 22 Flow rate adjusting member 23 Loader main body 24 Switch 30 Generator 32 Switching type test apparatus 33 Connection terminal 36 Water loader 40-1, 40-2, 40- 3 Connection Terminal 41 Circuit 42-1, 42-2, 42-3 Fixed Loader 44-2, 44-3, 44-4 Fan 60 Circuit 62 Loader Main Body 64 Resistor 66 Bar

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G01R 31/34 H02K 11/00 H01C 10/02 H01C 13/00

Claims (1)

(57) [Claims] An electricity tank (12) filled with a resistance liquid (10), a main electrode (14) arranged in the electricity tank (12) and supplied with power from a private generator to be tested. A movable insulator (16) interposed between the main electrode (14) and the power supply tank (12) for adjusting the amount of power supply from the main electrode (14) to the power supply tank (12); The circulating piping system (1) cools or filters the resistance liquid (10) inside and returns it to the current tank (12) again.
8), and an inlet pipe (20) connected to the piping system (18) above the power supply tank (12) and for feeding the resistance liquid (10) into the power supply tank (12). (20) connects the main electrode (14) to the current tank (1).
2) It also serves as a holding member that is suspended from above and holds it, and also serves as a power transmitting member that transmits power from a private generator to the main electrode (14). Select either low voltage or high voltage according to the standard voltage of the private generator,
A replaceable small-capacity water loader (36) of 500 KW or less, and a connection terminal (15) provided on the water loader (36)
And connection terminals (17-1, 17-2, 17-3,...)
17-n) and a plurality of fixed loaders (19-1, 19-2, 1) connected in parallel with the water loader (36).
9-3,... 19-n), and the fixed loaders (19-1, 19-2, 19-3,...).
19-n) includes a three-phase star connection circuit (41) in which a plurality of resistors are combined and connected in each phase, and a load main body (21) to which the output voltage of the generator (1) is applied. 23) and a switch (24) for switching the connection of the resistor in the circuit (41) according to the operation such that the withstand voltage of the circuit (41) corresponds to the output voltage of the generator (1). Replacing said main electrode (14) and said circuit (4)
Each fixed load device (19-1,
19-2, 19-3,... 19-n), the connection of the plurality of resistors is switched in parallel and in series or in parallel or in series to adjust the resistance value.
A water loader (36) and the fixed loaders (19-1, 19) can be used to test low-voltage generators of less than 00V or high-voltage generators of 700V or more.
, 19-3,..., 19-n), the number of load devices connected in parallel is adjusted so that 50
The capacity of the load to be applied without using a transformer by moving the movable insulator (16) of the water loader (36) can be adapted to the test of a small capacity type of 0 KW or less or a large capacity type of 800 KW or more. Switchable test equipment for private generators that enables power generation tests to be performed steplessly