JPH04178582A - Relay withstand voltage testing device - Google Patents

Abstract

PURPOSE:To prevent mis-operation of testing caused by non-impression of test voltage in a withstand voltage test imposed on a relay, by performing the withstand voltage test upon checking that the relay terminal is electrically connected with a test probe. CONSTITUTION:When first a changeover relay 7 is actuated followed by actuation of a power supply circuit 11, an internal contact 2 is closed as long as the coil terminal 4 is electrically connected with a test probe 5. If a contact terminal 3 is in electrical connection with the test probe 5, connection is generated between two lines of a connection sensing line 10 through this internal contact 2. Thus the probe 5 being connected with the contact terminal 3 and coil terminal 4 as all necessary ones for withstand voltage test can be checked by sensing that the two lines of the connection sensing line 10 are connected with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a testing device for testing the withstand voltage, which is one of the characteristic values of a relay.

[Conventional technology]

Conventionally, this type of test equipment has a test probe 5 of a withstand voltage tester 9 connected to a contact terminal 3 of a relay under test 1, as shown in FIG.
Although it was mechanically connected to terminals such as coil terminal 4, it was not confirmed that it was electrically connected.

[Problem to be solved by the invention]

The conventional test equipment described above does not check that the test probe is electrically connected to the terminal of the relay under test, so there may be a disconnection of the test probe or a problem between the relay under test and the test probe. If a contact failure occurs, the test voltage for the withstand voltage test will not be applied to the relay of the test object.
It had the disadvantage that the test result always returned a good product even though no actual pressure test was performed, and it lacked reliability as a testing device.

In addition, if a break in the test probe is discovered, the relay that has been tested will need to be retested, and since it is not clear when the test probe broke, there is the problem that more relays than necessary have to be retested. there were.

[Means to solve the problem]

A withstand voltage test device for a relay according to the present invention includes a test probe connected to a terminal of a relay under test, a withstand voltage tester that performs a withstand voltage test between terminals of the relay under test via the test probe, and a withstand voltage tester that performs a withstand voltage test between terminals of the relay under test via the test probe. The electrical connection detection means switches the connection of the probe to the withstand voltage tester, supplies power between the coil terminals of the relay under test via the test probe, and checks continuity between the contact terminals.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a circuit diagram showing an embodiment of the present invention. The withstand voltage tester 9 is connected to the contact terminal 3 and coil terminal 4 of the relay under test 1 by the test probe 5 via the switching relay 8 of the electrical connection detection circuit 6 . Further, the connection detection line 10 and the power supply circuit 11 are connected to the test probe 5 via the switching relay 7 of the electrical connection detection circuit 6.

Next, the operation will be explained. FIG. 2 is a time chart of the embodiment shown in FIG.

Now, when conducting a withstand voltage test between the coil and the contacts of the relay under test 1, there are a total of four terminals to which voltage should be applied: the contact terminal 3 and the coil terminal 4. When the switching relay 7 is first operated and then the power supply circuit 11 is operated, the internal contact 2 is operated if the coil terminal 4 and the test probe 5 are electrically connected. If the contact terminal 3 and the test probe 5 are electrically connected, the two lines of the connection detection line 10 will be electrically connected by the internal contact 2.

From the above, by detecting the electrical connection between the two lines of the connection detection line 10, the electrical connection between the contact terminal 3 and the coil terminal 4 and the test probe 5, which are all the terminals necessary for the withstanding voltage test, is established. The connection will be confirmed.

Next, the operation of the switching relay 7 and the power supply circuit 11 is stopped, the switching relay 8 is operated, and the test voltage of the withstand voltage tester 9 is applied to the relay under test 1 to perform a withstand voltage test.

〔Effect of the invention〕

As explained above, in the present invention, before conducting a withstand voltage test,
By performing a withstand voltage test after confirming that the terminals of the relay under test and the test glove are electrically connected, the test voltage for the withstand voltage test will not be applied to the relay under test and the result will be a good product. This has the effect of preventing electrical connection problems in the test equipment and early detection of problems in the electrical connections of the test equipment.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, and Fig. 2 is a circuit diagram showing an embodiment of the present invention.
The time chart of the circuit shown in the figure, and FIG. 3 is a circuit diagram of a conventional test device. DESCRIPTION OF SYMBOLS 1... Relay under test, 2... Internal contact, 3... Contact terminal, 4... Coil terminal, 5... Test probe,
6... Electrical connection detection circuit, 7... Switching relay, 8
... switching relay, 9... withstand voltage tester, 10... connection detection line, 11... power supply circuit.

Claims (1)

[Claims] Switching the connection between a test probe connected to a terminal of the relay under test, a withstand voltage tester that performs a withstand voltage test between the terminals of the relay under test via the test probe, and the withstand voltage tester of the test probe. A dielectric strength testing device for a relay, comprising: electrical connection detection means for supplying power between the coil terminals of the relay under test via the test probe and checking continuity between the contact terminals.