System for detecting tripping signal of circuit breaker

Abstract

The utility model discloses a system for detecting tripping signals of a circuit breaker. The system comprises a Hall relay; the power supply is connected with the Hall relay and adopts a direct-current power supply; a tripping signal line penetrates through a jaw of the Hall relay, and the Hall relay closes the normally open passive point by detecting a direct current pulse signal and records an interlocking tripping signal by receiving the normally open point. The non-contact circuit breaker tripping signal detection system adopts a non-contact circuit breaker tripping signal detection method, realizes the detection of the circuit breaker tripping signal by using the non-contact detection method under the condition of ensuring the reliability and the safety of a circuit breaker tripping loop, removes the intermediate link of shutdown in the traditional process, and improves the reliability and the safety of the circuit breaker tripping loop. And the hidden danger of failure of a process interlocking shutdown command caused by relay damage or protection crash is eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical equipment technical field especially relates to a system of detecting circuit breaker tripping signal. BACKGROUND

[0002] The prior art detects circuit breaker process tripping signal and generally adopts the following design scheme:

[0003] Scheme one: instrument control system outputs a signal, the signal is accessed to the comprehensive protection, realizes process tripping and tripping command record through the comprehensive protection output. Figure 1 As shown in the figure;

[0004] Scheme two: instrument control system outputs a signal, the signal is connected with current type signal relay, process tripping signal and signal relay coil are connected in series and accessed to circuit breaker tripping loop, signal relay output signal to the comprehensive protection, realizes process tripping and tripping command record. Figure 2 As shown in the figure;

[0005] Scheme three: instrument control system outputs a signal, adopts intermediate relay extension, and the extension signal is accessed to circuit breaker tripping loop and comprehensive protection input side respectively, realizes process tripping and tripping command record.

[0006] The above three schemes can realize the detection of circuit breaker tripping loop when the comprehensive protection or intermediate (signal) relay works normally, do not affect the correct action of circuit breaker during process tripping, realize the safe operation of process device.But when the comprehensive protection or intermediate (signal) relay fails, circuit breaker tripping loop will not be connected, process interlock tripping cannot be realized, which increases the risk and hidden danger of on-site process device operation.

[0007] Therefore, based on the above technical problems, the technical personnel in the art need to develop a system for detecting circuit breaker tripping signal. UTILITY MODEL CONTENT

[0008] The utility model aims at providing a system for detecting circuit breaker tripping signal, which adopts a non-contact circuit breaker tripping signal detection method, realizes the detection of circuit breaker signal tripping signal under the condition of ensuring the reliability and safety of circuit breaker tripping loop, removes the intermediate link of traditional process shutdown, and eliminates the hidden danger of process interlock shutdown command failure caused by relay damage or protection crash.

[0009] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0010] The utility model relates to a system for detecting circuit breaker tripping signal, which comprises:

[0011] Hall relay;

[0012] A power supply connected with the Hall relay, and the power supply adopts a direct current power supply;

[0013] The process interlock tripping signal line passes through the jaw of the Hall relay, the Hall relay closes the normally open passive point by detecting the direct current pulse signal, and records the interlock tripping signal by receiving the normally open point.

[0014] Further, the direct current power supply of the Hall relay is a direct current screen of a substation.

[0015] Further, the first wiring terminal and the second wiring terminal of the Hall relay are connected with the direct current power supply.

[0016] The third wiring terminal and the fourth wiring terminal of the Hall relay are connected with a relay protection device input interface, and the third wiring terminal and the fourth wiring terminal are passive points.

[0017] Further, when the relay protection device input interface receives a pulse signal of not less than 30 ms, the interlock can receive the signal.

[0018] Further, the process interlock tripping signal line is wound 3 times around the jaw of the Hall relay.

[0019] Further, the sampling threshold of the single-chip software program integrated in the Hall relay is 0.3 A to improve the output holding time to 50 ms.

[0020] In the above technical solution, the system for detecting the tripping signal of the circuit breaker has the following beneficial effects:

[0021] The system of the utility model adopts the non-contact circuit breaker tripping signal detection method, realizes the detection of the circuit breaker signal tripping signal under the condition of guaranteeing the reliability and safety of the circuit breaker tripping loop, removes the intermediate link of the traditional process shutdown, and eliminates the hidden danger of invalid process interlock shutdown command caused by the damage of the relay or the protection dead machine. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0023] Figure 1 It is the circuit principle diagram of the prior art scheme one;

[0024] Figure 2Circuit schematic diagram of the prior art scheme two;

[0025] Figure 3 Circuit schematic diagram of the prior art scheme three;

[0026] Figure 4 Circuit schematic diagram of a system for detecting circuit breaker tripping signal disclosed by the embodiment of the application.

[0027] Explanation of reference signs:

[0028] 10, Hall relay; 20, process interlock tripping signal line;

[0029] 1, first wiring terminal; 2, second wiring terminal; 3, third wiring terminal; 4, fourth wiring terminal. DETAILED DESCRIPTION

[0030] In order to make the skilled in the art better understand the technical scheme of the utility model, the utility model will be further described in detail below in combination with the drawings.

[0031] Referring to Figure 4 as shown;

[0032] The embodiment discloses a system for detecting circuit breaker tripping signal, which comprises:

[0033] Hall relay 10;

[0034] The power supply connected with the Hall relay 10, and the power supply adopts a direct current power supply;

[0035] The process interlock tripping signal line 20 passes through the jaw of the Hall relay 10, the Hall relay 10 closes the normally open passive point by detecting the direct current pulse signal, and records the interlock tripping signal by receiving the normally open point.

[0036] Specifically, the embodiment discloses a system for detecting circuit breaker tripping signal, which adopts a high-sensitivity Hall relay 10 to realize the detection of the circuit breaker tripping signal by using a non-contact detection method under the condition of guaranteeing the reliability and safety of the circuit breaker tripping circuit. Wherein, the high-sensitivity Hall relay 10 of the embodiment adopts a direct current (DC) power supply, and the power supply is taken from the direct current screen of a substation, which greatly guarantees the reliability of the relay power supply. The process interlock tripping signal line 20 passes through the jaw of the high-sensitivity Hall relay 10, when the manual emergency parking or the process interlock tripping signal is connected, the high-sensitivity Hall relay 10 closes the normally open passive point after detecting the direct current pulse signal, and records the interlock tripping signal by receiving the normally open point, so that the accurate recording of the process interlock tripping command is realized without increasing intermediate links.

[0037] Specific circuit, seeFigure 4 The circuit connection mode is that the first connecting terminal 1 and the second connecting terminal 2 of the Hall relay 10 are connected with a direct current power supply; the third connecting terminal 3 and the fourth connecting terminal 4 of the Hall relay 10 are connected with a relay protection device input interface, and the third connecting terminal 3 and the fourth connecting terminal 4 are passive contact points.

[0038] In the embodiment, when the relay protection device input interface receives a pulse signal of not less than 30 ms, the relay protection device can receive the signal.

[0039] The process interlock tripping signal line 20 is wound around the jaw of the Hall relay 10 for 3 turns.

[0040] The sampling threshold of the single-chip software program integrated in the Hall relay 10 is 0.3 A to increase the output holding time to 50 ms.

[0041] The first connecting terminal 1 and the second connecting terminal 2 of the high-sensitivity Hall relay 10 are connected with a direct current power supply, and the third connecting terminal 3 and the fourth connecting terminal 4 are connected with a relay protection device input interface.

[0042] In the above technical solution, the system for detecting the tripping signal of the circuit breaker has the following beneficial effects:

[0043] The system of the utility model adopts the non-contact circuit breaker tripping signal detection method, realizes the detection of the circuit breaker signal tripping signal under the condition of guaranteeing the reliability and safety of the circuit breaker tripping loop, removes the intermediate link of the traditional process shutdown, and eliminates the hidden danger of invalid process interlock shutdown command caused by the damage of the relay or the protection dead machine.

[0044] The above has only described certain exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature, and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A system for detecting a circuit breaker trip signal, the system comprising: The system comprises: a Hall relay (10); a power supply connected to the Hall relay (10), and the power supply adopts a direct current power supply; a process interlock tripping signal line (20) passes through the jaw of the Hall relay (10), and the Hall relay (10) closes a normally open passive point by detecting a direct current pulse signal and receives the normally open point to realize recording of the interlock tripping signal.

2. The system for detecting a circuit breaker trip signal of claim 1, wherein, The direct current power supply of the Hall relay (10) is a substation direct current screen.

3. The system for detecting a circuit breaker trip signal of claim 1, wherein, The first wiring terminal (1) and the second wiring terminal (2) of the Hall relay (10) are connected to the direct current power supply. The third wiring terminal (3) and the fourth wiring terminal (4) of the Hall relay (10) are connected to a relay protection device input interface, and the third wiring terminal (3) and the fourth wiring terminal (4) are passive points.

4. The system for detecting a circuit breaker trip signal of claim 3, wherein, When the relay protection device input interface receives a pulse signal not less than 30 ms, the relay protection device can receive the signal.

5. A system for detecting a circuit breaker trip signal according to claim 3 or 4, characterized in that, The process interlock tripping signal line (20) is wound 3 times on the jaw of the Hall relay (10).

6. The system for detecting a circuit breaker trip signal of claim 5, wherein, The sampling threshold of the single-chip software program integrated in the Hall relay (10) is 0.3 A to improve the output holding time to 50 ms.

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