KR200259107Y1 - Transformer for moving - Google Patents

Abstract

The present invention relates to a mobile uninterruptible transformer capable of supplying a low voltage load using a mobile transformer car to replace a column transformer in an uninterruptible state, wherein the connection of the mobile transformer is connected to the same as that of the column transformer and the automatic failure switch is opened. When the primary transformer (N) of the moving transformer is connected to the neutral line (N) of the column transformer, the primary cable is connected to the main line after connecting the R, S, and T phases of the high voltage inlet for the moving transformer. After the neutral wire (N) is connected and the R, S, and T phases are connected, the low voltage cable is connected to the low voltage bus of the pole transformer, the DC 24V control switch is put in, the AC power switch is put in after the fault switch is put in. The low pressure flaw is open after the transformer secondary switch is turned on.In parallel operation between the column transformer and the mobile transformer, the secondary lead wire of the column transformer is disconnected and The wires are insulated by the temporary insulating protective cap of the charging part, the switching switch of the column transformer is opened by the insulated operating rod, the switching switch is insulated by the switching switch cover, or the live clamp is separated by the insulated operating rod, and after the replacement of the column transformer The ground wire is connected to the neutral wire (N), the changeover switch is put into the insulated operating rod, and the secondary transformer switch of the moving transformer is opened and the automatic transformer switch of the primary transformer of the moving transformer is opened during parallel operation of the column transformer and the mobile transformer. Has

Description

UPS for transformers

The present invention relates to a mobile uninterruptible transformer that can replace a columnar transformer in an uninterruptible state without supplying low voltage load by using a mobile transformer vehicle.

As a related art, Korean Utility Model Publication No. 89-5150 describes an uninterruptible power supply for an AC-AC converter suitable for a low power, accurate sinusoidal wave and a load requiring no constant voltage.

Korean Patent Publication No. 93-6388 relates to a high-frequency intermediate link type DC alternating current power converter that receives high-frequency power through an insulating transformer,

Korean Patent Publication No. 97-106 relates to a vehicle-mounted transformer used in a vehicle driving electric system which performs backlashing and sacrificial control by a power converter such as a pulse width modulation control converter.

Korean Patent Publication No. 167167 relates to a mobile transformer system relating to a technology for performing work without generating a power failure on a high voltage line.

Japanese Laid-Open Patent Publication No. 6-153422 relates to an uninterruptible mobile power generation apparatus having an automatic phase synchronous control unit for controlling phase supplied to a load.

Japanese Laid-Open Patent Publication No. 5-56501 relates to an uninterruptible power transmission type power supply vehicle having a phase detection unit for detecting phases of a generator and a load-side power supply.

Other Korean Patent Publication Nos. 95-4670, 96-5640, 96-6183, 95-7425, 93-5292 and 96-3217, and Japanese Patent Laid-Open No. 6-113489 No. describes an uninterruptible overhead cable connection device and an uninterruptible uninterrupted power meter replacement device for replacing a transformer using a substation.

Conventional technologies require a lot of time due to the complicated transformer replacement method and the device is complicated when replacing the transformer in the uninterrupted state, there is a problem such as the risk of electric shock to the operator.

An object of the present invention is to solve the above-mentioned problems of the prior art, the present invention was to replace the transformer by removing the transformer at one time when replacing the transformer at one time, the internal electrical circuit according to the improvement of such mechanical structure The purpose of the present invention is to provide a mobile uninterruptible transformer capable of replacing a column transformer in an uninterrupted state by supplying a low voltage load by using a mobile transformer vehicle having all been modified.

With reference to the accompanying drawings of the uninterruptible transformer according to the present invention will be more clearly understood its features and advantages by the embodiments described in detail below.

1 is a front view of a mobile uninterruptible transformer of the present invention

2 is a transformer voltage diagram of the present invention

3 is a transformer voltage circuit diagram of the present invention

4 is another example of the voltage connection diagram of the present invention

5 is a circuit diagram illustrating the voltage connection of FIG. 4.

6 is another example of the voltage connection diagram of the present invention

7 is a circuit diagram illustrating the voltage connection of FIG. 6.

8 is an overcurrent relay (EOCR)

9 is a fault zone automatic switch (ASSC) mobile transformer

10 is a flowchart illustrating the installation of a mobile transformer vehicle

Figure 11 is a procedure for the removal of mobile transformer vehicle

In order to achieve the object as described above, the present invention has to be the same voltage and phase of the secondary side power supply of the columnar transformer and the secondary power supply of the pad (PAD) transformer of the uninterruptible transformer in order to replace the columnar transformer in an uninterruptible state. The present invention relates to a mobile uninterruptible transformer capable of supplying a low voltage load by using a mobile transformer vehicle in which the voltage connection of the uninterruptible transformer is carried out in the same circuit after accurately confirming the phase shape, and replacing the columnar transformer in an uninterruptible state.

The structure of the mobile uninterruptible transformer of the present invention is connected so that the connection of the mobile transformer is the same as that of the column transformer and when the automatic failure switch (ASSC) is opened, the neutral line (N) of the mobile transformer is connected to the neutral line (N) of the column transformer. After connecting R phase, S phase, T phase of the mobile transformer extra high voltage incoming line, the primary cable is connected to the main line,

Neutral wire (N) of low voltage line is connected, and after connecting R phase, S phase, T phase, low voltage cable is connected to the low voltage bus of the column transformer, DC 24V control switch is put in, and failure section automatic switch (ASSC) AC power switch is turned on after

After the transformer secondary switch is turned on, the low pressure flaw detector is turned off.

In parallel operation between the column transformer and the mobile transformer, the secondary lead wire of the column transformer is separated and the secondary lead wire is insulated by the temporary insulating protective cap of the live part, and the changeover switch (COS) of the column transformer is opened by the insulated operating rod and the changeover switch (COS). ) Is insulated by the selector switch cover, or the live clamp is separated by the insulated operating rod,

After replacing the column transformer, the ground wire of the column transformer is connected to the neutral wire (N) and the changeover switch is put into the insulated operating rod.

In parallel operation of the column transformer and the mobile transformer, the secondary transformer switch of the mobile transformer is opened and the primary transformer failure switch (ASSC) switch of the mobile transformer is opened.

The mobile uninterruptible transformer of the present invention is manufactured in a box type and used on a vehicle, and when it is not used for a long time, it can be separated from the car and stored in a warehouse.

1 is a front view of an uninterruptible transformer of the present invention, FIG. 2 is a voltage connection diagram of the present invention, FIG. 3 is a voltage connection circuit diagram of the present invention, FIG. 4 is another example of the voltage connection diagram of the present invention, and FIG. Figure 6 is another example of the voltage connection diagram of the present invention, Figure 7 is a voltage connection circuit diagram of Figure 6, Figure 8 is an overcurrent relay (EOCR), Figure 9 is a fault zone automatic switch (ASSC) mobile transformer, 10 is a flowchart illustrating a mobile transformer car installation work procedure, and FIG. 11 is a diagram illustrating a mobile transformer car demolition work procedure diagram.

As shown in the figure, the method of use of the present invention is briefly described to remove the transformer pressure and ground the mobile transformer vehicle ground to the ground. At this time, check wiring method of column transformer.

Connect the connection of the mobile transformer so that it is the same as the connection of the column transformer, check the OFF state of the automatic fault switch (ASSC), and then connect the primary neutral (N) of the mobile transformer to the neutral (N) of the pole. After connecting R phase, S phase, and T phase of mobile transformer extra high voltage incoming line, connect primary cable to main line.

Next, connect the neutral line (N) of the low voltage line first, connect the R phase, S phase, and T phase, connect the low voltage cable to the low voltage bus of the column transformer, and turn on the DC 24V control switch. Let's do it.

Next, when the low pressure flaw detector is turned on and in the ALL state, the buzzer rings for about 2 seconds and then it is installed normally. If there is no abnormality after low pressure inspection, turn on the transformer secondary switch and then turn off the low pressure inspection system.

When parallel operation is performed between the column transformer and the mobile transformer, the secondary lead wire of the column transformer is separated, and the secondary lead wire is insulated by the temporary insulating protective cap of the charging part, and the changeover switch (COS) of the column transformer is opened with an insulating operating rod. Insulate the (COS) with the switch cover or remove the live clamps with the insulated operating rod.

After replacing the column transformer, connect the live wire clamp to the insulated operating rod or remove the switch cover (cover) and connect the ground wire of the column transformer to the neutral wire (N) first, and then insert the switch into the insulated operating rod.

In parallel operation between the column transformer and the mobile transformer, remove the protective cap on the secondary lead wire and connect it after checking the phase with the low voltage bus, multi tester or low pressure flaw detector.

In case of parallel operation of columnar and mobile transformers, the secondary transformer switch of the mobile transformer is opened and the primary transformer failure switch (ASSC) switch of the mobile transformer is opened (OFF).

The primary and secondary cables are to be removed (primary cable must be discharged), the neutral wire and the vehicle ground are to be removed at the end and the work completed.

The above-mentioned over-current relay (EOCR) is as shown in Figure 3, the ammeter is used for overcurrent protection and the operating time is adjusted to 0 ~ 30 seconds, but mainly set in 1 second in preparation for short circuit of low voltage circuit, Since the load current of the transformer is 455.8A, it is calibrated to operate at 600A. Since the current transformer (CT) is 600/5, when it is set to 5A, the magnetic contactor (MC) is cut off when the load current 600A lasts for 1 second, and the magnetic contactor is turned on ( If you press the test button in the state of ON), you can confirm that the magnetic contactor is cut off after the corrected time.If the relay operates, the magnetic contactor is cut off during operation and the red indicator light turns on at the relay.

In this state, the magnetic contactor MC cannot be inserted and must be reset.

Pressing the reset button under the test button turns the red light off and the magnetic contactor can be turned on.

PHASE Fault Current Correction (A) causes phase minimum operating current to be two to three times the maximum load current, and ground fault fault current (A) may malfunction if the three-phase unbalance is large. Therefore, the normal operating phase fault minimum operating current should be 50%.

Fault Current Correction

division When operating only TR When working with bypass cable Phase fault current correction 25 (A) 200 (A) Ground fault current correction 13 (A) 100 (A)

The present invention, which operates as described above, is useful for safe and efficient use and inspection of transformers, and is simple in structure and easy to install and dismantle, and can be stored in warehouses when not in use. It is effective to supply good quality electricity.

Claims (1)

In the mobile uninterruptible transformer, When the connection of the mobile transformer is connected to the same as that of the column transformer, and when the automatic failure switch (ASSC) is opened, the neutral line (N) of the mobile transformer is connected to the neutral line (N) of the column transformer. After connecting R, S, and T phases, the primary cable is connected to the main line, the neutral wire (N) of the low voltage line is connected, and the low voltage cable is connected to the low voltage bus of the column transformer after connecting the R, S, and T phases. The control switch for direct current (DC) 24V is turned on, the AC power switch is turned on after the automatic failure switch (ASSC) is turned on, and the low pressure flaw detector is opened after the turn-on of the transformer secondary switch (ON). In parallel operation between the columnar transformer and the mobile transformer, the secondary lead wire of the columnar transformer is separated, the secondary lead wire is insulated by the temporary insulating protective cap of the charging part, and the changeover switch (COS) of the columnar transformer is opened by the insulated operating rod. Changeover switch (COS) Insulated by switch switch cover or live clamp is separated by insulated operating rod, after replacement of column transformer, ground wire of column transformer is connected to neutral wire (N), changeover switch is inserted into insulated operating rod, parallel of column transformer and moving transformer An uninterruptible transformer having a configuration in which a moving transformer secondary switch switch is opened and a moving transformer primary failure section automatic switch (ASSC) switch is opened during operation.