JPH04204068A - Apparatus for testing switch - Google Patents

Abstract

PURPOSE:To efficiently apply load duty to a breaker and to prevent the generation of erroneous operation due to noise by combining individual units each consisting of a power supply detection circuit, a delay circuit and a load state detection circuit and controlling the same in a cooperative state. CONSTITUTION:The start signal from a test starting apparatus 7 is detected by a test start signal detection circuit 8 to be applied to a power supply detection circuit 9 detecting a power supply state. The power supply detection circuit 9 judges whether a main power supply 1 is matched with the application condition prescribed to a switch to be tested and, when the power supply 1 reaches said condition, a control switch 2 is closed. Subsequently, the separate start signal of the test starting apparatus 7 is detected by a detection circuit 10 to be applied to a delay circuit 11 and the switch 3 to be tested is closed at a predetermined time and the duty set based on the application condition is applied to the switch 3. A load state is detected by a load state detection circuit 13 and each unit is insulated by optical connection and a tester is isolated from noise.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switch test device that applies a predetermined load duty to a general circuit breaker.

[Conventional technology]

The conventional device is (Hitachi Reviet+ Vo
Fig 17 New 5 of p67 of l19 Na 2
ynthetic test circuitswit
hACrecovery voltage 5ourc
The configuration is shown in e.). That is, this known example is a test equipment that has a current source and a voltage source, and applies a predetermined load duty to the test switch from the current source and voltage source to measure the breaking ability of the switch.

[Problem to be solved by the invention]

The above-mentioned conventional technology has the disadvantage that it is difficult to adjust the switch to provide a predetermined load duty and is susceptible to noise.

SUMMARY OF THE INVENTION An object of the present invention is to provide a test device that efficiently provides a predetermined load duty of a general circuit breaker and that does not malfunction due to noise generated when switching a test load.

[Means to solve the problem]

In order to achieve the above object, the present invention configures a power supply detection circuit, a delay circuit, and a load state detection circuit as individual units,
By operating individual units using a common test start signal detection circuit using a signal from a test start device, it is possible to efficiently apply a predetermined load duty to a test switch.

[Effect]

The power supply detection circuit detects the application conditions of the main power supply, the delay circuit sets the test start time, and the load state detection circuit detects the load state of the test switch.

By interlocking these individual units, it is possible to optimally and efficiently provide the load responsibility of the corresponding switch.

Furthermore, by insulating each unit with optical connections, the switch test device can be isolated from noise generated during the switching operation of the switch.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

1 is the main power supply, 2 is the control switch, 3 is the test switch, 4
indicates a detector.

A start signal given by the test start device 7 is detected by a test start signal detection circuit 8 and given to a power supply detection circuit 9 that detects the power state.

This power supply detection circuit 9 determines that the main power supply 1 meets the application conditions specified in the test switch 3, and closes the control switch 2 at the time when the application conditions are met.

Subsequently, another start signal given by the test start device 7 is detected by the test start signal detection circuit 10.

The signal is applied to the delay circuit 11. The test switch 3 is closed at a predetermined time from the test start signal. As a result, the test switch 3 is given the responsibility set by the application conditions. Subsequently, the test start signal detection circuit 12 is activated by another start signal given from the test start device 7, and the detector 4 detects the duty state given to the test switch 3 at a predetermined time.
The load state is detected by the load state detection circuit 13 via the load state detection circuit 13.

Based on this load state, in order to superimpose the load state using the auxiliary power supply 5, the load state detection circuit 13 closes the application switch 6 and superimposes the load on the test switch 3, thereby producing the specified load state. I can do it.

Although this embodiment has been described with a focus on closing the test switch 3, each test start signal detection circuit and power supply detection circuit 9.
Delay circuit 11. A desired main power supply state is determined by the combination of each pair of load state detection circuits 13.

2. Control switch arbitrarily depending on the timing and duty state of the load.
It is possible to open and close the test switch 3 and the application switch 6.

Another embodiment of the invention is shown in FIG.

1 uses AC power as the main power supply, 2 uses a control switch,
3 uses a test switch, and 4 uses an alternator as a detector.

Switches 7a to 7C are used as the test starting device 7. Reference numeral 15 indicates a DC power supply, and by closing 7a to 7C, the voltage of the DC power supply 15 is transmitted as a test start signal to the test start signal detection circuits 8 and 10.

When 7a is closed, a start signal is given from the test start signal detection circuit 8 to the power supply detection circuit 9. Here, the power supply detection circuit 9
detects the phase state of the signal AC power supply 14 that generates an AC signal in synchronization with the main power supply 1, and closes the control switch 2 at a specific phase.

Further, the test start signal detection circuit 10, which has been given the test start signal by closing the switch 7b, transmits the signal to the delay circuit 11, adjusts the delay time in the delay circuit 11, and closes the test switch 3.

As a result, a current is applied to the test switch 3.

This current state is detected by the detector 4, and the load state detection circuit 1
3, the application switch 6 is closed at a predetermined time, and a superimposed current is applied to the test switch 3 from the auxiliary power supply S constituted by a capacitor.

Thereby, a predetermined load duty can be given according to the test switch 3.

In addition, by combining these, it is possible to perform a breaking test on a test switch under a predetermined load condition.

In this embodiment, the purpose is to improve the noise tolerance generated during opening and closing of the switch of the entire switch test equipment.

A point on the negative pole side 16 of the DC power supply 15, the main power supply l, and the control switch 2. Test switch 3. A circuit constituted by the detector 4 and an auxiliary power supply 5. The grounding point 17 of the circuit constituted by the application switch 6 is used in an insulated state.

Also, test start signal detection circuits 8, 10.12 and power supply detection circuits 9. Delay circuit 11. Each connection of the load state detection circuit 13 is implemented by optical connection to improve noise resistance.

〔Effect of the invention〕

According to the present invention, since the individual units of the power supply detection circuit, delay circuit, and load state detection circuit can be combined and controlled in conjunction with each other, switchgear tests can be carried out efficiently when it is necessary to give complex load duties. I can do it

[Brief explanation of the drawing]

FIG. 1 shows a block diagram of one embodiment of the invention, and FIG. 2 shows a block diagram of another embodiment of the invention. 8.10.12...Test start signal detection circuit, 9...
Power supply detection circuit, 11... Delay circuit, 13... Load state detection circuit.

Claims (1)

[Claims] 1. In a load state detection device including a main power supply, a control switch connected to the main power supply, and a test switch, a test start device, a plurality of test start signal detection circuits connected to the test start device, and the respective test start signals It has a power supply detection circuit combined with a detection circuit, a delay circuit, and a load state detection circuit connected to the detector, and depending on the load state, the load state detection circuit closes the application switch and the auxiliary power supply closes the test switch. A switch test device characterized in that a switch is given a predetermined responsibility.