CN201247293Y - Phase splitter no-load test line - Google Patents

Abstract

The utility model discloses a split camera no-load test circuit, wherein a first three-phase AC contactor (1K) and a three-phase voltage regulator of the test circuit are sequentially connected between the three-phase AC power supply and the split camera (T) The second three-phase AC contactor (2K), wherein a single-phase AC contactor (1K) is also connected to one of the phase lines between the second three-phase AC contactor and the splitter camera. The utility model can realize the three-phase low-voltage start, single-phase operation and test of the split camera of the electric locomotive. This line solves the problem of no-load test of the split camera in units without test conditions, and the no-load test of the split camera can be carried out as long as there is a three-phase voltage regulator of more than tens of kilovolt-amperes.

Description

A split camera no-load test circuit

technical field

The utility model relates to an electric car no-load test device, in particular to a split camera no-load test circuit applicable to the no-load test of an electric locomotive split camera.

Background technique

The AC power supply of the electric locomotive is single-phase power, and all auxiliary motors on the car are three-phase motors. The split camera is a special motor that converts single-phase power into three-phase power, and the three-phase power output by it is used by all three-phase motors .

After the split camera is manufactured or repaired, it must be tested, but to start the split camera with single-phase full voltage, two necessary conditions are: there must be a single-phase voltage regulator above 400kVA and a power supply grid with a large enough capacity, because The starting current should reach more than 1200A. Some units do not have a large voltage regulator, or due to the limitation of the power grid capacity in the factory building, they cannot start the splitter with full voltage and single phase, so the no-load test and operation inspection of the splitter for electric locomotives cannot be carried out.

Utility model content

The technical problem solved by the utility model is: to provide a split camera no-load test circuit, which can carry out the no-load test of the split camera.

The technical solution of the utility model is: a split camera no-load test circuit, wherein the first three-phase AC contactor and the three-phase voltage regulator of the test circuit are sequentially connected between the three-phase AC power supply and the split camera. device, a second three-phase AC contactor, wherein a single-phase AC contactor is also connected to one of the phase lines between the second three-phase AC contactor and the split camera.

The split camera no-load test circuit described above, wherein the test circuit further includes a control circuit for interlocking control of the single-phase AC contactor and the first and second three-phase AC contactors.

The characteristics and advantages of the utility model are: the utility model can realize the three-phase low-voltage starting, single-phase operation and test of the split camera of the electric locomotive. The line device solves the problem of no-load test of the split camera in units without test conditions. As long as there are three-phase voltage regulators with tens of kVA and below 100kVA, the no-load test of the split camera can be carried out.

Description of drawings

Fig. 1 is a schematic diagram of the main control circuit of the present invention.

FIG. 2 is a schematic circuit diagram of a specific embodiment of the present invention.

Fig. 3 is the wiring diagram of the control circuit of this specific embodiment of the utility model.

Detailed ways

The specific implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific examples.

As shown in Figure 1, the utility model proposes a split camera no-load test circuit, the test circuit is connected between the three-phase AC power supply and the split camera, including the first three-phase AC contactor 1K, three-phase voltage regulator T, the second three-phase AC contactor 2K, wherein a single-phase AC contactor 3K is also connected to a phase (such as W-phase) line between the second three-phase AC contactor and the split camera.

In a specific embodiment of the present invention, as shown in Fig. 2 and Fig. 3, the test line is also provided with a control circuit KJ between the second three-phase AC contactor 2K and the single-phase AC contactor 3K, so as to control all The single-phase AC contactor 3K is interlocked with each of the three-phase AC contactors 1K and 2K, as shown in FIG. 3 .

Through the above test circuit, the following test steps can be used to realize the three-phase low-voltage starting, single-phase operation and test of the split camera:

1. Close the single-phase AC contactor 3K and the first three-phase AC contactor 1K. When the voltage regulator outputs about 100V, close the second three-phase AC contactor 2K. Thus, the three-phase AC contactor of the electric locomotive can be realized. phase low voltage start.

2. After starting the split camera, disconnect the single-phase AC contactor K3, and conduct the no-load test of the split camera when the voltage is adjusted to 380V.

Applying the no-load test circuit of the utility model to the no-load test bench can realize the three-phase low-voltage start-up, single-phase operation and test of the split camera of the electric locomotive. Among them, in addition to the above-mentioned no-load test circuit, other detection, signal, protection and other circuits of the test bench can be set as usual. For Taiwan use.

Due to the characteristics of the above-mentioned lines, even if there is no voltage regulator above 400kVA and a unit with a large enough power supply grid capacity, as long as there are three-phase voltage regulators above tens of kVA (preferably above 100kVA, 380V/0～ 600V), the no-load test of the split camera can be carried out; and when the no-load test of the split camera is not carried out on this test bench, the test of other three-phase asynchronous motors can be carried out as usual; The camera test is single-phase operation, but due to the interlock protection of the circuit, it will not cause single-phase start when other three-phase asynchronous motor tests are performed.

Claims (2)

1, a kind of split-phase motor no-load test circuit, it is characterized in that, between three-phase alternating-current supply and split-phase motor, be connected with first three-phase ac contactor (1K), three-phase regulator (T), second three-phase ac contactor (2K) of this test circuit in regular turn, wherein, between described second three-phase ac contactor and split-phase motor, wherein one also be connected with a single-phase AC contactor (1K) on the circuit mutually.

2, split-phase motor no-load test circuit as claimed in claim 1 is characterized in that, this test circuit also comprises the control circuit that carry out interlocked control of described single-phase AC contactor (3K) with first, second three-phase ac contactor (1K, 2K).

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