KR0145410B1 - Power supply checking system - Google Patents

Abstract

To adjust the amount of current flowing from the main electrode to the tank, the tank being filled with a resistive liquid and receiving power therein, the main electrode located in the tank and adapted to receive power from a non-utility generator, respectively. A plurality of tank units including a movable insulator provided between the main electrode and the tank, the plurality of tank units being provided according to the number of phases of the multi-phase AC power source used with the non-utility generator;

An additional tank unit provided for reserve;

A common unit in which the resistance liquid is collected from the plurality of tank units and positioned through the plurality of tank units in series;

A flow rate of the main supply pipe positioned on the plurality of tank units to receive the resistance liquid, a plurality of inlet pipes branched from the main supply pipe to the plurality of tank units, and the resistance liquid supplied to each tank unit; A power supply check system for a non-utility generator comprising a flow regulator valve attached to each inlet pipe for adjustment.

Description

Power supply check system for emergency generator

1 is a front view of a preferred embodiment of the present invention.

2 is a side view of FIG.

3 is a pipe circuit diagram showing details of a flow path of a resistance liquid.

4 and 5 are pipe circuit diagrams for explaining the manner in which the resist liquid flows through the passage.

6 is a schematic diagram of a conventional system.

* Explanation of symbols for the main parts of the drawings

10 tank 11: excess flow storage member

12: resistive liquid 14: main electrode

16: movable insulator 18: tank unit

20: common unit 22: main supply pipe

24: inlet pipe 26: regulator valve (flow regulator member)

28: drain pipe 30: insulator

32: connecting rod 34: elevator

36 common expansion tank 38 flexible hose

40: pump 42: radiator

44: fan 46: filter

54 liquid storage tank 56, 58 suction pipe

60: pump 62, 64, 65, 66, 72, 76: pipe

61, 70, 78: switching valve 74: radiator

82: water purifier 84: pump

86: spray pipe 90: spray nozzle

100: insulator 104: output cable

106, 108: supply pipe 110, 112: drainage pipe

The present invention relates to a power supply check system for an emergency generator.

Such a check system is used to check the power output of an emergency generator provided in a high-rise building or the like to cope with an emergency situation such as a power failure.

In Fig. 6, a typical system employed to date is exemplified, which is provided with three tanks 10 to which electric power is supplied, since emergency generators subjected to electric power equivalent inspection are usually three-phase AC type.

Within each tank 10 a main electrode 14 is located, the bottom of which is supported at the bottom of the tank 10 via an insulator 100.

Around the main electrode 14, a vertically displaceable cylindrical insulator 16 is located, and the tank 10 is filled with the resistive liquid 12.

The tank 10 and the main electrode 14 are connected to an emergency generator (not shown) by the output cable 104.

Thereafter, a current is supplied between the tank 10 and the main electrode 14 to check the output characteristics of the generator for the required time.

The load is adjusted by the vertical displacement of the heating element 16, and the heated resistance liquid 12 is pumped out by the pump 40 during the inspection, and the radiator 42 is passed through the drain pipes 110 and 112. It is supplied to and cooled back to the tank 10 through the supply pipes 106 and 108.

However, in the conventional inspection system described above, there is a change of 15 ° C in liquid temperature between the tanks 10 to which electric power is applied at the time of inspection.

For this reason, the resistance (or current) value of the tank 10 changes, and therefore, a serious difficulty is encountered in balancing the load, which is an important factor in the inspection.

This also makes it difficult to perform a power supply check correctly.

When any tank 10 or electrode 14 is damaged during inspection, the inspection should be stopped immediately. In other words, if only one tank fails, the inspection system cannot be operated.

In view of the above, it is an object of the present invention to provide a power supply inspection system that can ensure a simple but accurate power supply inspection and continue operation even if any tank or electrode fails during the inspection.

In order to achieve the above object, the inspection system according to the present invention is configured as follows.

1, a general embodiment of the inspection system according to the present invention is shown.

As shown, a plurality of tank units 18 are provided above the common unit 20, and each includes a tank 10, a main electrode 14, and a movable insulator 16 that are powered. do.

How many tank units 18 are located is determined by the number of phases of the emergency generator.

At least one additional tank unit 18 is provided for reserve.

The tank 10 is filled with a resistive liquid and includes a suspended main electrode 14 supported from above.

This electrode 14 is powered by an emergency generator to be checked.

Between the tank 10 and the main electrode 14, a movable insulator 16 is placed to adjust the amount of current passing between them.

Each tank 10 accommodates an inlet pipe 24 for receiving the resistance liquid 12, and the inlet pipe 24 branches off from the main supply pipe 22.

As can be seen from the first road, each inlet pipe 24 is provided with a flow regulator member 26 for adjusting the flow rate of the resist liquid 12.

According to the present invention, the resistive liquid 12 filled in the tank 10 can be maintained at a substantially constant temperature for normal operation, which means that the resistive liquid 12 filled in the reserve tank unit 18 ( The temperature increase can be leveled, since the temperature rises even during the inspection) is distributed to the resistive liquid 12 contained in the tank unit 18 used for normal operation.

In addition, at least one tank unit 18 provided for reserve can continue to operate even if any tank 10 or electrode 14 fails.

Moreover, the regulator 26 for adjusting the flow volume of the resistance liquid 12 attached to each tank 10 can control the leveling of the liquid temperature rise in the tank 10 more accurately.

EXAMPLE

In FIG. 1 showing a schematic configuration of a check system according to the present invention, four tank units 18 are located on a common unit 20.

This is because one of these tank units is a spare, and a generator generally used is a three-phase alternating current type.

Each tank unit 18 includes a substantially cylindrical tank 10 positioned above the common unit 20, a suspended main electrode 14 stored in the tank 10, and a tank 10 and a main electrode ( And 14) a movable insulation body 16 provided therebetween.

The tank 10 is filled with a resistance liquid 12 in which water is usually used.

The tank 10 is provided at its upper end with an excess flow accommodating member 11 for accommodating the overflowed water against the expansion of the heated resistance liquid 12 at the initial stage of the inspection, whereby water leakage is prevented. Care must be taken to ensure that the product is guaranteed and contributes to increased stability.

The tank 10 and the main electrode 14 are both cylindrical in shape so that a current can be smoothly supplied between them.

The common unit 20 collects the resistive liquid 12 located above and supplies it to the radiator 42 which will be described later.

The common unit 20 also receives a significant amount of air generated in the tank 10 during operation and transports it to the reserve tank 10 for aeration.

This is because arcing occurs during the inspection when a large amount of air is introduced into the tank 10, and a load is applied in a mismatched state so that an accurate inspection cannot be achieved.

It can be seen that the inlet pipe 24 covered with an insulating material such as Teflon extends from above into the tank 10 while supporting the main electrode 14.

As shown in FIG. 1, the inlet pipe 24 is provided with a connecting terminal rod 32 at an upper end thereof through an insulator 30.

In addition, the rod 32 is connected to the cable of the emergency generator to be inspected in order to supply current between the main electrode 14 and the tank 10.

As shown again in FIG. 2, as the movable insulation 16 moves vertically by the elevator 34, the area of the electrode 14 and the tank 10 receiving electric power is varied so that the amount of current supplied is adjusted. do.

Above the tank 10, a common expansion tank 36 is located, to which a plurality of inlet pipes 24 are connected via a flexible hose 38 which is resistant to voltage and erosion.

The expansion tank 36 is provided with a main supply pipe 22 for receiving the resistance liquid 12, and a resistance flowing toward the inlet pipe 24 between the expansion tank 36 and each flexible hose 38. A regulator valve 26 for adjusting the flow rate of the liquid 12 is installed.

The common unit 20 located below the tank 10 is provided with a drain pipe 28 for draining the resistance liquid 12, and the pump 40 is equipped with the drain pipe 28.

The drain pipe 28 is connected to a radiator 42 whose outlet side is connected to the main supply pipe 22 (see FIGS. 1 and 3).

The resistance liquid 12 heated in the tank 10 is supplied to the radiator 42 which is collected, heat-exchanged or cooled through the drain pipe 18.

The collected and cooled liquid is then distributed back to the tanks 10 through the associated flexible hose 38 and inlet pipe 24.

In this case, the regulator valve 26 of the reserve tank unit 18 is closed so that the resist liquid 12 can circulate through the other tank unit 18.

Although the resistive liquid 12 is not circulated through the reserve tank as described above, the resistive liquid is dispensed from the reserve tank 10 to the resistive liquid 12 contained in the other tank 10. The temperature of the resistance liquid 12 in the two tanks 10 can be properly maintained in relation to the flow rate adjustment made by the regulator valve 26.

Thus, the load in the tank is balanced so that an accurate check can be performed.

In order to prevent the temperature of the resist liquid 12 from exceeding a predetermined value during operation, the radiator 42 is cooled by the fan 44.

If desired, the resist liquid 12 can be filtered through the filter 46 (especially when the inspection system is used for high pressure inspection).

In FIG. 3 showing a detailed circuit through which the resist liquid 12 flows, the drain pipe 28 attached to the common unit 20 is connected to the inlet side of the radiator 42 via the pump 40 on the other side.

Similarly, the radiator 42 is connected to the main supply pipe 22 at the outlet side.

In each of the inlet pipes 24 branched from the main supply pipe 22, a flow regulator valve 26 is provided.

The liquid reservoir tank 54 containing a large amount of the resistive liquid 12 includes suction pipes 56 and 58 extending downward, and the suction pipes 56 include pipes 62, 64 and The main supply pipe 22 is connected via the 66 and the pump 60.

Through the switching valve 61 and the pipe 65, the pump 60 is connected to the main supply pipe 22, where the resist liquid 12 flows away from the radiator 42.

Pipes 64 and 74 are connected to selector valves 70 and 78, respectively.

The pipe 74 to which the radiator 74 and the filter 46 are connected is connected between the switching valve 70 and the pipe 76.

The selector valve 78 is connected to the water purifier 82 on the other side.

The suction pipe 58 is connected to the spray pipe 86 through the pump 84.

The operation of the circulation circuit as described above will be described.

As shown, the resist liquid (or tap water) 12 is pumped through the suction pipe 56 (or (water tap 88)) in the storage tank 54, and the pipes 62 and 72 And, via the radiator 74, the filter 46 and the pipe 66 (if necessary, through the water purifier 82) to the main feed pipe 22, and thus through the associated inlet pipe 24 10) filled in.

As the tank 10 is filled with the resistive liquid 12, the generator connected to the tank 10 and the main electrode 14 by a cable (not shown) is operated and checked for a given time.

For example, the power check is performed for a generator having an output of 1000 KVA, a power factor of 0.8, a voltage of 415 V, and a current value of 642.6 A in about 3 hours.

At the time of inspection, the resist liquid 12 is supplied to the radiator 42 through the drain pipe 28 in the tank 10 by the circulation pump 40, where the resist liquid is collected and cooled.

Thereafter, the collected and cooled liquid is supplied back to the tank 10 through the main supply pipe 22 and the inlet pipe 24.

In the meantime, the fan 44 is driven, the resistance liquid 12 is pumped out of the storage tank 54 by the pump 84, and the injection nozzle 90 through the suction pipe 58 and the spray pipe 86. ) Is called on the radiator 42.

Then, the temperature of the resist liquid 12 in each tank 10 is detected to control the rotation of the fan 44 at all times.

In the present invention, since the resistance liquid 12 is circulated for reuse, it tends to be contaminated with impurities in each tank 10 during inspection.

If the resistance liquid 12 decreases in purity due to contamination by impurities (especially at the time of high voltage check), the conductivity increases, causing a problem in the power output check.

This contamination has a particularly serious effect on the high voltage check, since the resistive liquid 12 is pure water.

Therefore, in the illustrated embodiment, the resistance liquid 12 may overflow during the inspection. For this overflow, the valves 61 and 67 are switched as shown in FIG. 3 and the resistance liquid 12 cooled in the radiator 42 is pumped through the pipe 65 by the pump 60. It is fed to pipe 62 and is fed to a separate radiator 74 through pipe 72 for subsequent cooling.

The resist liquid 12 that has left the radiator 74 is supplied through the pipe 72 to the filter 46 through which it is filtered.

If necessary, it is supplied to the water purifier 82 to increase the purity.

The resistance liquid 12 having increased purity is supplied to the tank 10 through the pipe 66, the main supply pipe 22, and the inlet pipe 24.

According to the simple embodiment as described above, four tank units 18 which are introduced into the common unit 20 are provided.

One of these tank units is used for reserve.

The resistive liquid contained in this spare unit can be used to adjust the temperature of the liquid contained in the remaining three tanks 10 in operation.

Therefore, the internal resistance of the tank is always kept constant, so that the load on it is leveled, so that the emergency generator can be checked accurately.

The flow rate of the resistance liquid 12 supplied to each tank 10 is controlled by the associated flow regulator valve 26 so that the temperature thereof can be controlled more accurately.

Even if any tank 10 or electrode 14, including the reserve tank unit 18, is damaged during the inspection, the inspection system can continue to work by an exchange action.

Since the resistance liquid 12 is not circulated through the preliminary tank 10, air can be discharged from the common tank 20 through the preliminary tank.

Therefore, there is no fear that air enters the tank 10 during operation, and contributes to the promotion of safety during inspection.

Whether the resistance liquid 12 is contaminated with impurities can be easily confirmed by looking into the preliminary tank 10.

The main electrode 14 is supported by the inlet pipe 24 at the top thereof and is arranged in the associated tank 10 in a suspended state, so that the liquid does not need to be formed at the bottom of the common tank 20. There is no fear of outflow from the common unit 20.

Although the present invention has been specifically described with reference to specific preferred embodiments, it will be understood that many variations or modifications are possible within the scope of the invention as defined by the appended claims.

Claims (3)

A tank 10 filled with a resistive liquid 12 and supplied with power therein, a main electrode 14 located in the tank 10 and adapted to receive power from an emergency generator, and the main electrode 14. A phase of a multi-phase AC power source used for an emergency generator, including a movable insulator 16 provided between the main electrode 14 and the tank 10 to adjust the amount of current flowing from the tank 10 to the tank 10. A plurality of tank units 18 provided according to the number and provided with electric power; An additional tank unit 18 provided for reserve; A common unit (20) in which the resist liquid (12) is collected from the plurality of tank units (18) and positioned through the plurality of tank units (18) in series; A main supply pipe 22 located on the plurality of tank units 18 and a plurality of inlets branching from the main supply pipe 22 to the plurality of tank units 18 so as to receive the resistance liquid 12. Pipe 24; And a flow regulator valve (26) attached to each inlet pipe (24) for adjusting the flow rate of the resistance liquid (12) supplied to each tank unit (18). 2. The power supply check system according to claim 1, comprising three tank units (18) and one spare tank unit (18) according to a three-phase alternating current source generated by the emergency generator. The method of claim 1, wherein the tank 10 and the main electrode 14 is Cylindrical power supply check system.