Battery-powered relay tester

Abstract

To provide a battery-integrated relay tester which is highly portable, facilitates on-site testing, shortens test preparation time, enables measurement of operating time, and ensures greater safety. The battery-powered relay tester of the present invention has the following configuration. -Power supply circuit equipped with an internal rechargeable battery 11, which can operate without an external power source A control circuit to detect changes in test current and measure the relay operating time. Built-in microphone17 detects the sound of the circuit breaker during the circuit breaker interlock test. -Timer circuit that measures the elapsed time from relay output to breaker operation - Limit function that limits the power supply to the circuit breaker for a certain period of time Display and operation touch panel 18 As a result of the above, a single lightweight and compact testing device is created, which improves the efficiency of the entire testing process.

Description

[Technical Field]

[0001] This invention relates to a tester for testing the operation of relays and circuit breakers, and in particular to a portable tester with a built-in battery that outputs test voltage and test current, measures operating time, and detects and protects circuit breaker operating sounds. [Background technology]

[0002] Conventional relay testers supply test current from an external power source to detect the response of the relay. External power sources are not portable, and in tests linked to a circuit breaker, time measurement using the circuit breaker's contact signal is common, and in order to obtain the circuit breaker's contact signal, additional devices and cords for detecting the contact signal must be connected, which is a labor-intensive task. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention has been made to solve the above-mentioned problems of the conventional technology, and provides a portable tester that can be used without an external power source, and that can detect whether a circuit breaker has operated based on the output from the relay by the sound of the circuit breaker operating, measure the operating time, and further prevent overload by limiting the time that current is passed through the circuit breaker. [Means for solving the problem]

[0004] The battery-powered relay tester of the present invention has the following configuration: -Power supply circuit equipped with an internal rechargeable battery 11, which can operate without an external power source A program to detect changes in test current and measure the operating time of relays Built-in microphone17 detects the sound of the circuit breaker during the circuit breaker interlock test. -Timer function to measure the elapsed time from relay output to circuit breaker operation - Limit function that limits the power supply to the circuit breaker for a certain period of time · Touch panel for operation 18 [Effects of the Invention]

[0005] The present invention provides the following advantages: -The built-in battery makes it highly portable and easy to test on site. - There is no need to connect the contact output of the relay or circuit breaker to the tester, which reduces test preparation time. The response time of the circuit breaker to the relay output can be detected by the physical operating sound. · It is possible to measure the operating time even if the breaker does not have contact output. · Even if the circuit breaker does not operate, safety is ensured by the limit function. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is an overall view of a battery-powered relay tester according to the present invention; [Figure 2] 1 is a block diagram of a battery-integrated relay tester according to the present invention; [Figure 3] FIG. 1 is an image diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0007] The tester itself is housed in a highly portable housing 10, with a handle on the top cover. The DC voltage of the battery 11 is adjusted by the internally connected step-up / step-down circuit 12, which then converts it to AC by the sine wave generator circuit 13. The step-up / step-down circuit 12 and sine wave generator circuit 13 have two circuits: one for current output, which controls the current by feedback, and the other for voltage output, which controls the voltage by feedback. The magnitude, frequency, and phase of the current and voltage outputs can be freely set using the microcomputer 9 and program, enabling testing of a variety of relays, including overcurrent relays that operate on current elements, overvoltage relays that operate on voltage elements, directional earth fault relays that operate on current, voltage, and their phase differences, and reverse power relays. In an overcurrent relay test, when the test current flows and the relay operates, current is applied to the circuit breaker, and the built-in microphone 17 detects the circuit breaker's operating sound, ending the measurement at that point. The control circuit measures the time that has elapsed from the operation of the relay to the sound of the circuit breaker operating, and displays the time on the touch panel 18. Furthermore, even if the circuit breaker does not operate within the specified time, the system will automatically cut off the power supply after the set time has elapsed, preventing accidents such as burnout or overheating of the circuit breaker. [Explanation of symbols]

[0008] 1 Touch Panel 2 Power switch 3 Current output terminal 4 All element output terminals 5 Voltage output terminal 6 Trip detection terminal 7-phase changeover switch 8 Battery Charging Port

[0009] 9 Microcomputer 10 cabinets 11 Battery 12. Buck-boost circuit 13 sine wave generation circuit 14 Current detector 15 Current output terminal 16 voltage output terminals 17 Built-in microphone 18 Touch Panel

[0010] 19 Earth fault relay tester 20 Overcurrent relay tester 21 Portable Power Station 22 prototypes

Claims

1. A tester for testing the operation of relays, characterized by having an internal rechargeable battery, a power supply circuit that outputs a predetermined test current, and measuring means that detects the operation of the relay based on changes in the test current and measures the operating time and operating current.

2. 2. A tester for a built-in battery relay according to claim 1, wherein the measuring means includes a built-in microphone for detecting the operating sound of the circuit breaker in synchronization with the contact output of the relay, and the operating time and operating current are measured based on the acoustic signal from the microphone.

3. 3. A tester for a built-in battery relay according to claim 1, further comprising a limit function for automatically cutting off the current when a preset time has elapsed after the start of current flow to the circuit breaker.

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