A portable time relay check circuit, device and method

Abstract

This invention relates to the field of relay calibration technology, and in particular to a portable time relay calibration circuit, device, and method, comprising a timer, a first intermediate relay, a second intermediate relay, a first selector switch, a second selector switch, a third selector switch, a DC voltmeter, a power switch, a start button, a reset button, a power indicator light, and a power module. This invention achieves calibration of eight different types of time relays using two intermediate relays through different combinations of three selector switches. It features a simple structure, good integration, low cost, and improves the calibration capability of time relays during ship navigation.

Description

Technical Field

[0001] This application relates to the field of relay verification technology, and in particular to a portable time relay verification circuit, device and method. Background Technology

[0002] Various models of time relays are used in the electrical control systems of ships to implement logic control functions for certain systems or electrical equipment. During routine inspections, maintenance, and repairs of the electrical control systems, specialized instruments are required to check and calibrate the delay performance of these time relays. Currently, most time relay calibration devices on the market only calibrate a specific model of time relay, resulting in poor integration. A few multi-functional calibration devices use microcontroller principles to calibrate multiple models of time relays, but these are expensive and have poor maintainability; if the calibration device malfunctions while the ship is at sea, repair is inconvenient. Summary of the Invention

[0003] Therefore, it is necessary to provide a portable time relay calibration circuit, device, and method to address the aforementioned technical problems. Compared with traditional time relay calibration devices, it can improve maintainability while maintaining high integration, and its structure is simple and easy to carry.

[0004] To achieve the above objectives, the present invention provides a portable time relay calibration circuit, including a timer, a first intermediate relay, a second intermediate relay, a first selector switch, a second selector switch, a third selector switch, a DC voltmeter, a power switch, a start button, a reset button, a power indicator light, and a power module.

[0005] The signal line of the timer is connected to the normally open contact of the first intermediate relay and the third selector switch, and the power supply line of the timer is connected to the power input terminal.

[0006] The contact terminals of the first intermediate relay are connected to the first selector switch, the second selector switch, and the third selector switch. The two ends of the coil of the first intermediate relay are connected to the power input terminal through the start button and the reset button, respectively. The normally open contact terminal of the first intermediate relay is connected in parallel with the start button.

[0007] The contact terminals of the second intermediate relay are connected to the second selector switch and the third selector switch; the two ends of the coil of the second intermediate relay are connected to the coil of the time relay to be tested and the power supply.

[0008] The first selection switch includes an AC range and a DC range; when the first selection switch is set to the AC range, the coil of the time relay to be tested is connected to the power input terminal; when the first selection switch is set to the DC range, the coil of the time relay to be tested is connected to the output terminal of the power module.

[0009] The second selector switch includes a power-on delay setting and a power-off delay setting.

[0010] The third selector switch includes a normally closed contact position and a normally open contact position.

[0011] When the second selector switch selects the power-on delay position, the coil of the time relay to be tested is connected to the normally open contact terminal of the first intermediate relay, the normally open contact terminal of the second intermediate relay is connected to the normally closed contact position of the third selector switch, and the normally closed contact terminal of the second intermediate relay is connected to the normally open contact position of the third selector switch.

[0012] When the second selector switch selects the power-off delay setting, the coil of the time relay to be tested is connected to the normally closed contact terminal of the first intermediate relay, the normally closed contact terminal of the second intermediate relay is connected to the normally closed contact setting of the third selector switch, and the normally open contact terminal of the second intermediate relay is connected to the normally open contact setting of the third selector switch.

[0013] The power module input terminal is connected to the power input terminal, and the power module output terminal is connected to the DC range of the first selector switch, for supplying DC power to the coil of the time relay to be tested.

[0014] The input terminal of the DC voltmeter is connected to the power input terminal, and the voltage signal line of the DC voltmeter is connected to the DC range of the first selector switch, for measuring the voltage across the coil of the time relay to be calibrated.

[0015] The power indicator light is connected to the power input terminal and is used to indicate the on / off state of the power input. Optionally, the portable time relay calibration circuit further includes a DC power indicator light, which is connected to the DC position of the first selector switch.

[0016] Optionally, the portable time relay calibration circuit further includes an emergency stop button, which is connected in series with the output terminal of the power switch.

[0017] In addition, to achieve the above objectives, the present invention also proposes a portable time relay calibration device, which includes the portable time relay calibration circuit described above.

[0018] Furthermore, to achieve the above objectives, this invention also proposes a portable time relay verification method. This portable time relay verification method is based on the aforementioned portable time relay verification circuit and includes several operating modes, namely: Verifying an AC energized delay relay with normally closed slow-release contacts: After correctly connecting the time relay to be tested, set the first selector switch to the AC position, the second selector switch to the energized delay position, and the third selector switch to the normally closed contact position; turn on the power switch to connect the power supply, the power indicator light illuminates, the second intermediate relay coil is energized, the normally open contact of the second intermediate relay closes, and the timer enters the ready state; press the start button, the first intermediate relay is energized, the three sets of normally open contacts of the first intermediate relay close, the coil of the time relay to be tested is energized, the timer's timing signal is connected, and the timer starts timing; when the time relay to be tested completes its delay action, the normally closed slow-release contact opens, the second intermediate relay coil is de-energized, the normally open contact of the second intermediate relay opens, the timer's timing signal is interrupted, timing stops, and the action time of the time relay to be tested is displayed; press the reset button to complete the verification.

[0019] To verify the AC energized time-delay relay with normally open slow-pull contacts: After correctly connecting the time relay to be tested, set the first selector switch to the AC position, the second selector switch to the energized time-delay position, and the third selector switch to the normally open contact position; turn on the power switch to connect the power supply, the power indicator light will illuminate, the second intermediate relay coil will be de-energized, the normally closed contact of the second intermediate relay will close, and the timer will enter the ready state; press the start button, the first intermediate relay will be energized, the three sets of normally open contacts of the first intermediate relay will close, the coil of the time relay to be tested will be energized, the timer's timing signal will be connected, and the timer will start timing; when the time relay to be tested completes its delay action, the normally open slow-pull contact will close, the second intermediate relay coil will be energized, the normally closed contact of the second intermediate relay will open, the timer's timing signal will be interrupted, the timing will stop, and the action time of the time relay to be tested will be displayed; press the reset button to complete the verification.

[0020] To verify the AC power-off delay relay with normally closed slow-closing contacts: Set the first selector switch to the AC position, the second selector switch to the power-off delay position, and the third selector switch to the normally closed contact position; turn on the power switch to connect the power supply, the power indicator light will illuminate, the coil of the time relay to be tested will be energized, the coil of the second intermediate relay will be de-energized, the normally closed contact of the second intermediate relay will close, and the timer will enter the preparation state; press the start button, the normally open contact of the first intermediate relay will close, the timer's timing signal will be connected, and the timer will start timing; when the time relay to be tested completes its delay action, the normally closed slow-closing contact will close, the coil of the second intermediate relay will be energized, the normally closed contact of the second intermediate relay will open, the timer's timing signal will be interrupted, the timing will stop, and the action time of the time relay to be tested will be displayed; press the reset button to complete the verification. To verify the AC power-off delay relay with normally open slow-release contacts: After correctly connecting the time relay to be tested, set the first selector switch to the AC position, the second selector switch to the power-off delay position, and the third selector switch to the normally open contact position; turn on the power switch to connect the power supply, the power indicator light will illuminate, the coil of the time relay to be tested will be energized, the coil of the second intermediate relay will be energized, the normally open contact of the second intermediate relay will close, and the timer will enter the ready state; press the start button, the normally open contact of the first intermediate relay will close, the timer's timing signal will be connected, and the timer will start timing; the normally closed contact of the first intermediate relay will open, the coil of the time relay to be tested will be de-energized, and the timer will enter the delay action process; when the time relay to be tested completes the delay action, the normally open slow-release contact will open, the coil of the second intermediate relay will be de-energized, the normally open contact of the second intermediate relay will open, the timer's timing signal will be interrupted, the timing will stop, and the action time of the time relay to be tested will be displayed; press the reset button to complete the verification.

[0021] To verify the DC energized time-delay relay with normally closed slow-release contacts: After correctly connecting the time relay to be tested, set the first selector switch to the DC position, the second selector switch to the energized time-delay position, and the third selector switch to the normally closed contact position; turn on the power switch to connect the power supply, the power indicator light will illuminate, adjust the output voltage of the power module to the required value, and then correctly connect the time relay to be tested; the coil of the second intermediate relay will be energized, the normally open contact of the second intermediate relay will close, and the timer will enter the ready state; press the start button, the first intermediate relay will be energized, the three sets of normally open contacts of the first intermediate relay will close, the coil of the time relay to be tested will be energized, the timer's timing signal will be connected, and the timer will start timing; when the time relay to be tested completes its delay action, the normally closed slow-release contact will open, the coil of the second intermediate relay will be de-energized, the normally open contact of the second intermediate relay will open, the timer's timing signal will be interrupted, the timing will stop, and the action time of the time relay to be tested will be displayed; press the reset button to complete the verification.

[0022] To verify the DC energized time-delay relay with normally open soft-close contacts: Set the first selector switch to the DC position, the second selector switch to the energized time-delay position, and the third selector switch to the normally open contact position; turn on the power switch to connect the power supply, the power indicator light will illuminate, adjust the output voltage of the power module to the required value, and then correctly connect the time relay to be tested; the coil of the second intermediate relay is de-energized, the normally closed contact of the second intermediate relay closes, and the timer enters the ready state; press the start button, the first intermediate relay is energized, the three sets of normally open contacts of the first intermediate relay close, the coil of the time relay to be tested is energized, the timer's timing signal is connected, and the timer starts timing; when the time relay to be tested completes its delay action, the normally open soft-close contact closes, the coil of the second intermediate relay is energized, the normally closed contact of the second intermediate relay opens, the timer's timing signal is interrupted, the timing stops, and the action time of the time relay to be tested is displayed; press the reset button to complete the verification.

[0023] To verify the DC power-off delay relay with normally closed soft-close contact: Set the first selector switch to DC mode, the second selector switch to power-off delay mode, and the third selector switch to normally closed contact mode; turn on the power, the power indicator light will illuminate, adjust the output voltage of the power module to the required value, and then correctly connect the time relay to be tested; the coil of the time relay to be tested is energized, the coil of the second intermediate relay is de-energized, the normally closed contact of the second intermediate relay closes, and the timer enters the preparation state; press the start button, the normally open contact of the first intermediate relay closes, the timer's timing signal is activated, and the timer starts timing; when the time relay to be tested completes its delay action, the normally closed soft-close contact closes, the coil of the second intermediate relay is energized, the normally closed contact of the second intermediate relay opens, the timer's timing signal is interrupted, the timing stops, and the action time of the time relay to be tested is displayed; press the reset button to complete the verification.

[0024] The following steps are performed to verify a DC power-off delay relay with a normally open, slow-release contact: Set the first selector switch to the DC position, the second selector switch to the power-off delay position, and the third selector switch to the normally open contact position. Turn on the power; the power indicator light illuminates. Adjust the output voltage of the power module to the required value, and then correctly connect the time relay to be tested. The coil of the time relay to be tested is energized, the coil of the second intermediate relay is energized, and the normally open contact of the second intermediate relay closes, putting the timer into a ready state. Press the start button; the normally open contact of the first intermediate relay closes, the timer's timing signal is activated, and the timer begins timing. The normally closed contact of the first intermediate relay opens, the coil of the time relay to be tested is de-energized, and the timer enters the delay operation process. When the time relay to be tested completes its delay operation, the normally open, slow-release contact opens, the coil of the second intermediate relay is de-energized, the normally open contact of the second intermediate relay opens, the timer's timing signal is interrupted, timing stops, and the action time of the time relay to be tested is displayed. Press the reset button to complete the verification. Compared with the prior art, the beneficial effects of this invention are:

[0025] The portable time relay verification circuit in this embodiment of the invention verifies eight different types of time relays by using two intermediate relays through different combinations of three selector switches. It has a simple structure, good integration, and low cost, thus improving the verification capability of time relays during ship navigation. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 This is a circuit diagram of a specific example of a portable time relay verification circuit in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of a specific example of a portable time relay verification circuit in an embodiment of the present invention.

[0029] Figure 3 This is a front panel view of a specific example of a portable time relay calibration device in an embodiment of the present invention.

[0030] Figure label:

[0031] 21-First selector switch SA2, 22-Second selector switch SA3, 23-Third selector switch SA4, 31-First intermediate relay K1, 32-Second intermediate relay K2, 40-Power module TB, 41-Start button SB1, 42-Reset button SB2, 43-Emergency stop button SB3, 44-Power indicator HL1, 45-DC power indicator HL2, 46-DC voltmeter, 50-Timer. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application. It should be noted that in the description of the present application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In this application's embodiments, "multiple" refers to two or more. In this application's embodiments, "connection" refers to various connection methods, such as direct or indirect connection, to achieve communication between devices; this application's embodiments do not impose any limitations on this.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] The embodiments of this application will now be described with reference to the accompanying drawings.

[0036] Please see Figure 1 and Figure 2 , Figure 1 This is a circuit schematic diagram of a specific example of a portable time relay verification circuit provided in this application. Figure 2This application provides a schematic block diagram of a specific example of a portable time relay calibration circuit. The calibration circuit includes a timer (50), a first intermediate relay K1 (31), a second intermediate relay K2 (32), a first selector switch SA2 (21), a second selector switch SA3 (22), a third selector switch SA4 (23), a DC voltmeter (46), a power switch SA1 (20), a start button SB1 (41), a reset button SB2 (42), and a power module TB (40).

[0037] The signal line of the timer (50) is connected to the normally open contact of the first intermediate relay K1 (31) and the third selector switch SA4 (23), and the power supply line of the timer (50) is connected to the power input terminal.

[0038] The contact terminals of the first intermediate relay K1 (31) are connected to the first selector switch SA2 (21), the second selector switch SA3 (22), and the third selector switch SA4 (23). The two ends of the coil of the first intermediate relay K1 (31) are connected to the power input terminal through the start button SB1 (41) and the reset button, respectively. The normally open contact terminal of the first intermediate relay K1 (31) is connected in parallel with the start button SB1 (41). The contact terminals of the second intermediate relay K2 (32) are connected to the second selector switch SA3 (22) and the third selector switch SA4 (23). The two ends of the coil of the second intermediate relay K2 (32) are connected to the coil of the time relay to be tested and the power supply.

[0039] The first selection switch SA2 (21) includes an AC range and a DC range; when the first selection switch SA2 (21) selects the AC range, the coil of the time relay to be tested is connected to the power input terminal; when the first selection switch SA2 (21) selects the DC range, the coil of the time relay to be tested is connected to the output terminal of the power module TB (40).

[0040] The second selector switch SA3(22) includes a power-on delay setting and a power-off delay setting.

[0041] The third selector switch SA4(23) includes a normally closed contact position and a normally open contact position.

[0042] When the second selector switch SA3 (22) selects the power-on delay setting, the coil of the time relay to be tested is connected to the normally open contact terminal of the first intermediate relay K1 (31), the normally open contact terminal of the second intermediate relay K2 (32) is connected to the normally closed contact setting of the third selector switch SA4 (23), and the normally closed contact terminal of the second intermediate relay K2 (32) is connected to the normally open contact setting of the third selector switch SA4 (23). When the second selector switch SA3 (22) selects the power-off delay setting, the coil of the time relay to be tested is connected to the normally closed contact terminal of the first intermediate relay K1 (31), the normally closed contact terminal of the second intermediate relay K2 (32) is connected to the normally closed contact setting of the third selector switch SA4 (23), and the normally open contact terminal of the second intermediate relay K2 (32) is connected to the normally open contact setting of the third selector switch SA4 (23). The input terminal of the power module TB (40) is connected to the power input terminal, and the output terminal of the power module TB (40) is connected to the DC position of the first selection switch SA2 (21) to supply DC power to the coil of the time relay to be tested.

[0043] The input terminal of the DC voltmeter (46) is connected to the power input terminal, and the voltage signal line of the DC voltmeter (46) is connected to the DC range of the first selection switch SA2 (21) for measuring the voltage across the coil of the time relay to be calibrated.

[0044] The power indicator HL1(44) is connected to the power input terminal and is used to indicate the on / off status of the power input.

[0045] Optionally, the portable time relay calibration circuit further includes a DC power indicator HL2 (45), which is connected to the DC position of the first selection switch SA2 (21).

[0046] Optionally, the portable time relay calibration circuit further includes an emergency stop button SB3 (43), which is connected in series with the output terminal of the power switch SA1 (20).

[0047] like Figure 3 As shown, to achieve the above objectives, the present invention also proposes a portable time relay calibration device, which includes the portable time relay calibration circuit described above. This device arranges various switches, indicator lights, and instruments in a manner conducive to operation, and is equipped with corresponding indicator lights and warning lights.

[0048] To achieve the above objectives, the present invention also proposes a portable time relay verification method. This portable time relay verification method is based on the aforementioned portable time relay verification circuit. The method has several operating modes depending on the type of time relay, namely:

[0049] Verify the AC energized delay relay with normally closed slow-release contacts: After correctly connecting the time relay to be tested, set the first selector switch SA2 (21) to the AC position, the second selector switch SA3 (22) to the energized delay position, and the third selector switch SA4 (23) to the normally closed contact position; turn on the power switch SA1 (20) to connect the power supply, the power indicator HL1 (44) lights up, the coil of the second intermediate relay K2 (32) is energized, the normally open contact of the second intermediate relay K2 (32) closes, and the timer (50) enters the preparation state; press the start button SB1 (41), the first intermediate relay K1 (31) is energized, and the three sets of normally open contacts of the first intermediate relay K1 (31) close. First, it realizes the self-protection of the start button SB1 (41); second, it realizes the power supply of the coil of the time relay to be tested, and the time relay to be tested enters the delay action process; third, it connects the timing signal of the timer (50), and the timer (50) starts timing. When the coil of the time relay to be tested is energized, the timing signal of the timer (50) is turned on, and the timer (50) starts timing; when the time relay to be tested completes the delay action, the normally closed slow release contact opens, the coil of the second intermediate relay K2 (32) is de-energized, the normally open contact of the second intermediate relay K2 (32) opens, the timing signal of the timer (50) is interrupted, the timing stops and the action time of the time relay to be tested is displayed; press the reset button SB2 (42) to complete the test.

[0050] Verify the AC energized delay relay with normally open slow-draw contacts: After correctly connecting the time relay to be tested, set the first selector switch SA2 (21) to the AC position, the second selector switch SA3 (22) to the energized delay position, and the third selector switch SA4 (23) to the normally open contact position; turn on the power switch SA1 (20) to connect the power supply, the power indicator HL1 (44) lights up, the coil of the second intermediate relay K2 (32) is de-energized, the normally closed contact of the second intermediate relay K2 (32) closes, and the timer (50) enters the preparation state; press the start button SB1 (41), the first intermediate relay K1 (31) is energized, and the three sets of normally open contacts of the first intermediate relay K1 (31) close. First, it realizes the self-protection of the start button SB1 (41); second, it realizes the power supply of the coil of the time relay to be tested, and the time relay to be tested enters the delay action process; third, it connects the timing signal of the timer (50), and the timer (50) starts timing. When the coil of the time relay to be tested is energized, the timing signal of the timer (50) is turned on, and the timer (50) starts timing; when the time relay to be tested completes the delay action, after the normally open slow-closing contact is closed, the coil of the second intermediate relay K2 (32) is energized, the normally closed contact of the second intermediate relay K2 (32) is opened, the timing signal of the timer (50) is interrupted, the timing stops and the action time of the time relay to be tested is displayed; press the reset button SB2 (42) to complete the verification.

[0051] Verify the AC power-off delay relay with normally closed slow-draw contact: Set the first selector switch SA2 (21) to the AC position, the second selector switch SA3 (22) to the power-off delay position, and the third selector switch SA4 (23) to the normally closed contact position; turn on the power, the power indicator HL1 (44) lights up, the coil of the time relay to be tested is energized, the coil of the second intermediate relay K2 (32) is de-energized, the normally closed contact of the second intermediate relay K2 (32) closes, and the timer (50) enters the ready state; press start. Press button SB1(41), the normally open contact of the first intermediate relay K1(31) closes, the timing signal of the timer (50) is turned on, and the timer (50) starts timing; when the time relay to be tested completes the delay action, the normally closed slow-closing contact closes, the coil of the second intermediate relay K2(32) is energized, the normally closed contact of the second intermediate relay K2(32) opens, the timing signal of the timer (50) is interrupted, the timing stops and the action time of the time relay to be tested is displayed; press reset button SB2(42) to complete the verification.

[0052] Verify the AC power-off delay relay with normally open slow-release contacts: After correctly connecting the time relay to be tested, set the first selector switch SA2 (21) to the AC position, the second selector switch SA3 (22) to the power-off delay position, and the third selector switch SA4 (23) to the normally open contact position; turn on the power switch SA1 (20) to connect the power supply, the power indicator HL1 (44) lights up, the coil of the time relay to be tested is energized, the coil of the second intermediate relay K2 (32) is energized, the normally open contact of the second intermediate relay K2 (32) closes, and the timer (50) enters the preparation state; press the start button SB1 (4 1) When the normally open contact of the first intermediate relay K1 (31) closes, the timing signal of the timer (50) is turned on, and the timer (50) starts timing; when the normally closed contact of the first intermediate relay K1 (31) opens, the coil of the time relay to be tested is de-energized and enters the delay operation process; when the time relay to be tested completes the delay operation, the normally open release contact opens, the coil of the second intermediate relay K2 (32) is de-energized, the normally open contact of the second intermediate relay K2 (32) opens, the timing signal of the timer (50) is interrupted, the timing stops and the action time of the time relay to be tested is displayed; press the reset button SB2 (42) to complete the verification. Verification of the DC energized delay relay with normally closed slow-release contacts: After correctly connecting the time relay to be tested, set the first selector switch SA2 (21) to the DC position, the second selector switch SA3 (22) to the energized delay position, and the third selector switch SA4 (23) to the normally closed contact position; turn on the power switch SA1 (20) to connect the power supply, and the power indicator HL1 (44) will light up. After adjusting the output voltage of the power module TB (40) to the required value, correctly connect the time relay to be tested; the coil of the second intermediate relay K2 (32) is energized, the normally open contact of the second intermediate relay K2 (32) closes, and the timer (50) starts. Enter the preparation state; press the start button SB1 (41), the first intermediate relay K1 (31) is energized, the three normally open contacts of the first intermediate relay K1 (31) are closed, the coil of the time relay to be tested is energized, the timing signal of the timer (50) is turned on, and the timer (50) starts timing; when the time relay to be tested completes the delay action, the normally closed slow release contact is opened, the coil of the second intermediate relay K2 (32) is de-energized, the normally open contact of the second intermediate relay K2 (32) is opened, the timing signal of the timer (50) is interrupted, the timing stops and the action time of the time relay to be tested is displayed; press the reset button SB2 (42) to complete the verification.

[0053] Verify the DC energized delay relay with normally open soft-pull contact: Set the first selector switch SA2 (21) to the DC position, the second selector switch SA3 (22) to the energized delay position, and the third selector switch SA4 (23) to the normally open contact position; turn on the power switch SA1 (20) to connect the power supply, the power indicator HL1 (44) lights up, adjust the output voltage of the power module TB (40) to the required value, and then correctly connect the time relay to be tested; the coil of the second intermediate relay K2 (32) is de-energized, the normally closed contact of the second intermediate relay K2 (32) closes, and the timer (50) enters the ready state; press Press the start button SB1 (41), the first intermediate relay K1 (31) is energized, the three normally open contacts of the first intermediate relay K1 (31) are closed, the coil of the time relay to be tested is energized, the timing signal of the timer (50) is turned on, and the timer (50) starts timing; when the time relay to be tested completes the delay action, after the normally open slow-closing contact is closed, the coil of the second intermediate relay K2 (32) is energized, the normally closed contact of the second intermediate relay K2 (32) is opened, the timing signal of the timer (50) is interrupted, the timing stops and the action time of the time relay to be tested is displayed; press the reset button SB2 (42) to complete the verification.

[0054] Verify the DC power-off delay relay with normally closed slow-draw contact: Set the first selector switch SA2 (21) to the DC position, the second selector switch SA3 (22) to the power-off delay position, and the third selector switch SA4 (23) to the normally closed contact position; turn on the power switch SA1 (20) to connect the power supply, and the power indicator HL1 (44) will light up. Adjust the output voltage of the power module TB (40) to the required value, and then correctly connect the time relay to be tested; the coil of the time relay to be tested is energized, the coil of the second intermediate relay K2 (32) is de-energized, the normally closed contact of the second intermediate relay K2 (32) is closed, and the timer (50) enters the preparation state; press the start button SB1 (41), and the normally open contact of the first intermediate relay K1 (31) is closed. This serves three purposes: first, to achieve self-protection of the start button SB1 (41); second, to provide power to the coil of the time relay to be tested, and the time relay to be tested enters the delay operation process; and third, to connect the timing signal of the timer (50), and the timer (50) starts timing. When the time relay to be tested completes its delay action and the normally closed slow-closing contact closes, the coil of the second intermediate relay K2 (32) is energized, the normally closed contact of the second intermediate relay K2 (32) opens, the timing signal of the timer (50) is interrupted, the timing stops and the action time of the time relay to be tested is displayed; press the reset button SB2 (42) to complete the verification.

[0055] Verify the DC power-off delay relay with normally open slow-release contacts: Set the first selector switch SA2 (21) to the DC position, the second selector switch SA3 (22) to the power-off delay position, and the third selector switch SA4 (23) to the normally open contact position; turn on the power switch SA1 (20) to connect the power supply, and the power indicator HL1 (44) will light up. Adjust the output voltage of the power module TB (40) to the required value, and then correctly connect the time relay to be tested; the coil of the time relay to be tested is energized, the coil of the second intermediate relay K2 (32) is energized, the normally open contact of the second intermediate relay K2 (32) is closed, and the timer (50) enters the preparation state; press the start button SB1 (41), and the normally open contact of the first intermediate relay K1 (31) is closed. This serves three purposes: first, to achieve self-protection of the start button SB1 (41); second, to provide power to the coil of the time relay to be tested, and the time relay to be tested enters the delay action process; and third, to connect the timing signal of the timer (50), and the timer (50) starts timing. When the normally closed contact of the first intermediate relay K1 (31) is opened, the coil of the time relay to be tested is de-energized and enters the delay operation process; when the time relay to be tested completes the delay operation, the normally open release contact is opened, the coil of the second intermediate relay K2 (32) is de-energized, the normally open contact of the second intermediate relay K2 (32) is opened, the timing signal of the timer (50) is interrupted, the timing stops and the operation time of the time relay to be tested is displayed; press the reset button SB2 (42) to complete the verification.

[0056] When a remeasurement is required, press the timer reset button (50) and the reset button SB2 (42) to reset the system. Repeat the above steps as needed to verify the function of the time relay.

[0057] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A portable time relay calibration circuit, characterized in that, include: Timer, first intermediate relay, second intermediate relay, first selector switch, second selector switch, third selector switch, DC voltmeter, power switch, start button, reset button, power indicator light and power module; The signal line of the timer is connected to the normally open contact of the first intermediate relay and the third selector switch, and the power supply line of the timer is connected to the power input terminal. The contact terminals of the first intermediate relay are connected to the first selector switch, the second selector switch, and the third selector switch. The two ends of the coil of the first intermediate relay are connected to the power input terminal through the start button and the reset button, respectively. The normally open contact terminal of the first intermediate relay is connected in parallel with the start button. The contact terminals of the second intermediate relay are connected to the second selector switch and the third selector switch; the coil terminals of the second intermediate relay are connected to the coil of the time relay to be tested and the power supply. The first selection switch includes an AC range and a DC range; when the first selection switch is selected in the AC range, the coil of the time relay to be tested is connected to the power input terminal; when the first selection switch is selected in the DC range, the coil of the time relay to be tested is connected to the output terminal of the power module. The second selector switch includes a power-on delay setting and a power-off delay setting; The third selector switch includes a normally closed contact position and a normally open contact position; When the second selector switch selects the power-on delay position, the coil of the time relay to be tested is connected to the normally open contact terminal of the first intermediate relay, the normally open contact terminal of the second intermediate relay is connected to the normally closed contact position of the third selector switch, and the normally closed contact terminal of the second intermediate relay is connected to the normally open contact position of the third selector switch. When the second selector switch selects the power-off delay position, the coil of the time relay to be tested is connected to the normally closed contact terminal of the first intermediate relay, the normally closed contact terminal of the second intermediate relay is connected to the normally closed contact position of the third selector switch, and the normally open contact terminal of the second intermediate relay is connected to the normally open contact position of the third selector switch. The power module input terminal is connected to the power input terminal, and the power module output terminal is connected to the DC range of the first selection switch, for supplying DC power to the coil of the time relay to be tested; The input terminal of the DC voltmeter is connected to the power input terminal, and the voltage signal line of the DC voltmeter is connected to the DC range of the first selector switch, for measuring the voltage across the coil of the time relay to be calibrated. The power indicator light is connected to the power input terminal and is used to indicate the on / off status of the power input.

2. The portable time relay verification circuit according to claim 1, characterized in that: It also includes a DC power indicator light, which is connected to the DC position of the first selector switch.

3. A portable time relay verification circuit according to any one of claims 1 to 2, characterized in that: It also includes an emergency stop button, which is connected in series with the output terminal of the power switch.

4. A portable time relay calibration device, characterized in that, Includes a portable time relay verification circuit as described in any one of claims 1-3.

5. A portable time relay calibration method, characterized in that: The portable time relay calibration circuit applied as described in any one of claims 1-3 includes several operating modes, namely: Verify the AC energized time-delay relay with normally closed slow-release contacts: After correctly connecting the time relay to be tested, set the first selector switch to the AC position, the second selector switch to the energized time-delay position, and the third selector switch to the normally closed contact position; turn on the power, the power indicator light illuminates, the coil of the second intermediate relay is energized, the normally open contact of the second intermediate relay closes, and the timer enters the ready state; press the start button, the first intermediate relay is energized, the three sets of normally open contacts of the first intermediate relay close, the coil of the time relay to be tested is energized, the timer's timing signal is connected, and the timer starts timing; when the time relay to be tested completes its delay action, the normally closed slow-release contact opens, the coil of the second intermediate relay is de-energized, the normally open contact of the second intermediate relay opens, the timer's timing signal is interrupted, the timing stops, and the action time of the time relay to be tested is displayed; Press the reset button to complete the verification; Verify the AC energized time-delay relay with normally open slow-pull contacts: After correctly connecting the time relay to be tested, set the first selector switch to the AC position, the second selector switch to the energized time-delay position, and the third selector switch to the normally open contact position; turn on the power, the power indicator light illuminates, the second intermediate relay coil is de-energized, the normally closed contact of the second intermediate relay closes, and the timer enters the ready state; press the start button, the first intermediate relay is energized, the three sets of normally open contacts of the first intermediate relay close, the coil of the time relay to be tested is energized, the timer's timing signal is connected, and the timer starts timing; when the time relay to be tested completes its delay action, the normally open slow-pull contact closes, the second intermediate relay coil is energized, the normally closed contact of the second intermediate relay opens, the timer's timing signal is interrupted, the timing stops, and the action time of the time relay to be tested is displayed; Press the reset button to complete the verification; To verify the AC power-off delay relay with normally closed slow-closing contact: Set the first selector switch to the AC position, the second selector switch to the power-off delay position, and the third selector switch to the normally closed contact position; turn on the power, the power indicator light illuminates, the coil of the time relay to be tested is energized, the coil of the second intermediate relay is de-energized, the normally closed contact of the second intermediate relay closes, and the timer enters the ready state; press the start button, the normally open contact of the first intermediate relay closes, the timer's timing signal is connected, and the timer starts timing; when the time relay to be tested completes its delay action, the normally closed slow-closing contact closes, the coil of the second intermediate relay is energized, the normally closed contact of the second intermediate relay opens, the timer's timing signal is interrupted, the timing stops, and the action time of the time relay to be tested is displayed; Press the reset button to complete the verification; Verify the AC power-off delay relay with normally open slow-release contacts: After correctly connecting the time relay to be tested, set the first selector switch to the AC position, the second selector switch to the power-off delay position, and the third selector switch to the normally open contact position; turn on the power, the power indicator light illuminates, the coil of the time relay to be tested is energized, the coil of the second intermediate relay is energized, the normally open contact of the second intermediate relay closes, and the timer enters the ready state; press the start button, the normally open contact of the first intermediate relay closes, the timer's timing signal is connected, and the timer starts timing; the normally closed contact of the first intermediate relay opens, the coil of the time relay to be tested is de-energized, and the timer enters the delay action process; when the time relay to be tested completes the delay action, the normally open slow-release contact opens, the coil of the second intermediate relay is de-energized, the normally open contact of the second intermediate relay opens, the timer's timing signal is interrupted, the timing stops, and the action time of the time relay to be tested is displayed; Press the reset button to complete the verification; Verify the DC energized time-delay relay with normally closed slow-release contacts: After correctly connecting the time relay to be tested, set the first selector switch to the DC position, the second selector switch to the energized time-delay position, and the third selector switch to the normally closed contact position; turn on the power, the power indicator light will illuminate, adjust the output voltage of the power module to the required value, and then correctly connect the time relay to be tested; the coil of the second intermediate relay is energized, the normally open contact of the second intermediate relay closes, and the timer enters the preparation state; press the start button, the first intermediate relay is energized, the three sets of normally open contacts of the first intermediate relay close, the coil of the time relay to be tested is energized, the timer's timing signal is connected, and the timer starts timing; when the time relay to be tested completes the delay action, the normally closed slow-release contact opens, the coil of the second intermediate relay is de-energized, the normally open contact of the second intermediate relay opens, the timer's timing signal is interrupted, the timing stops, and the action time of the time relay to be tested is displayed; Press the reset button to complete the verification; To verify the DC energized time-delay relay with normally open soft-close contacts: Set the first selector switch to the DC position, the second selector switch to the energized time-delay position, and the third selector switch to the normally open contact position; turn on the power, the power indicator light will illuminate, adjust the output voltage of the power module to the required value, and then correctly connect the time relay to be tested; de-energize the coil of the second intermediate relay, the normally closed contact of the second intermediate relay will close, and the timer will enter the ready state; press the start button, the first intermediate relay will be energized, the three sets of normally open contacts of the first intermediate relay will close, the coil of the time relay to be tested will be energized, the timer's timing signal will be connected, and the timer will start timing; when the time relay to be tested completes its delay action, the normally open soft-close contact will close, the coil of the second intermediate relay will be energized, the normally closed contact of the second intermediate relay will open, the timer's timing signal will be interrupted, the timing will stop, and the action time of the time relay to be tested will be displayed; Press the reset button to complete the verification; To verify the DC power-off delay relay with normally closed soft-pull contact: Set the first selector switch to the DC position, the second selector switch to the power-off delay position, and the third selector switch to the normally closed contact position; turn on the power supply, the power indicator light will illuminate, adjust the output voltage of the power module to the required value, and then correctly connect the time relay to be tested. When the coil of the time relay to be tested is energized, the coil of the second intermediate relay is de-energized, the normally closed contact of the second intermediate relay closes, and the timer enters the preparation state; when the start button is pressed, the normally open contact of the first intermediate relay closes, the timer's timing signal is connected, and the timer starts timing; when the time relay to be tested completes its delay action, the normally closed slow-closing contact closes, the coil of the second intermediate relay is energized, the normally closed contact of the second intermediate relay opens, the timer's timing signal is interrupted, the timing stops, and the action time of the time relay to be tested is displayed; Press the reset button to complete the verification; To verify the DC power-off delay relay with normally open slow-release contacts: Set the first selector switch to the DC position, the second selector switch to the power-off delay position, and the third selector switch to the normally open contact position; turn on the power, the power indicator light will illuminate, adjust the output voltage of the power module to the required value, and then correctly connect the time relay to be tested; the coil of the time relay to be tested is energized, the coil of the second intermediate relay is energized, the normally open contact of the second intermediate relay closes, and the timer enters the preparation state; press the start button, the normally open contact of the first intermediate relay closes, the timer's timing signal is connected, and the timer starts timing; the normally closed contact of the first intermediate relay opens, the coil of the time relay to be tested is de-energized, and the timer enters the delay action process; when the time relay to be tested completes the delay action, the normally open slow-release contact opens, the coil of the second intermediate relay is de-energized, the normally open contact of the second intermediate relay opens, the timer's timing signal is interrupted, the timing stops, and the action time of the time relay to be tested is displayed; Press the reset button to complete the verification.

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