Stepped alarm system for ring main unit

Abstract

The utility model proposes a stepped alarm system for a ring main unit, and the system is characterized in that a first temperature sensor is disposed in an outgoing line unit, a second temperature sensor is disposed in a main circuit breaker unit, a third temperature sensor is disposed in a rectification unit, and a fourth temperature sensor is disposed in the outgoing line unit; the stepped temperature alarm device comprises a low-decibel whistling device, a medium-decibel whistling device, a high-decibel whistling device and a remote alarm sending device, and further comprises a partial discharge signal sensor arranged in the ring main unit. The partial discharge signal sensor is sequentially connected with the low-decibel whistling device, the medium-decibel whistling device, the high-decibel whistling device and the remote alarm sending device, temperature sensors are arranged on the outgoing line unit, the main circuit breaker unit, the rectification unit and the outgoing line unit, feedback is carried out through the stepped temperature alarm device, the accident condition can be conveniently estimated in advance, and the safety of the system is improved. And targeted treatment is carried out.

Description

Technical Field

[0001] The utility model particularly relates to a stepped alarm system for a ring network cabinet. Background Art

[0002] Ring main units (RMUs) are electrical equipment used to connect and distribute power, and are commonly found in urban power grids. However, during normal operation, abnormalities may occur within the RMUs, such as overtemperature, abnormal pressure, and gas leaks. If these conditions are not detected and addressed promptly, they can lead to equipment failure or even serious safety incidents.

[0003] In order to ensure the safe operation of ring network cabinets, some temperature sensors and alarm devices have appeared on the market. However, most of these devices can only detect a single parameter and cannot comprehensively monitor the operating status of the equipment. In addition, there are problems such as fixed alarm volume and short alarm distance when alarming. Abnormal situations cannot be effectively and promptly notified to monitoring personnel, and the safety management requirements of ring network cabinets cannot be met. After the external power supply is cut off, the power supply of the temperature sensor cannot be maintained.

[0004] The technical problem to be solved by the present invention is how to use a stepped alarm system to provide a stepped alarm for the temperature when a fire occurs in a ring network cabinet, so as to help personnel understand the urgency of the situation and carry out targeted treatment. Utility Model Content

[0005] In order to solve the above problems, this utility model proposes a stepped alarm system for ring network cabinets. By setting temperature sensors in the outgoing line unit, main circuit breaker unit, rectifier unit and outgoing line unit, and providing feedback through a stepped temperature alarm device, it is convenient to make early estimates of accident situations and carry out targeted treatment. The following is a specific solution:

[0006] A stepped alarm system for a ring network cabinet, comprising an outgoing line unit, a main circuit breaker unit, a rectifier unit and an incoming line unit, and further comprising a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor, wherein the first temperature sensor is arranged in the outgoing line unit, the second temperature sensor is arranged in the main circuit breaker unit, the third temperature sensor is arranged in the rectifier unit, and the fourth temperature sensor is arranged in the incoming line unit, the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all connected to a power line, and the power line provides an external power supply for the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor, The first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all connected to the backup power line, and the backup power line is connected to the internal backup battery. The first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all connected to the step temperature alarm device, and the step temperature alarm device includes a low-decibel whistle device, a medium-decibel whistle device, a high-decibel whistle device and a remote alarm sending device, and also includes a partial discharge signal sensor arranged inside the ring network cabinet. The partial discharge signal sensor is used to detect the partial discharge signal inside the ring network cabinet. The partial discharge signal sensor is connected to the low-decibel whistle device, the medium-decibel whistle device, the high-decibel whistle device and the remote alarm sending device in sequence.

[0007] In order to monitor various parameters inside the ring main unit, a pressure sensor is provided on one side of the first temperature sensor, and a power line of the pressure sensor is connected in parallel with a power line connected to the first temperature sensor.

[0008] In order to monitor various parameters inside the ring main unit, a gas sensor is provided on one side of the second temperature sensor, and a power line of the gas sensor is connected in parallel with a power line connected to the second temperature sensor.

[0009] In order to prevent the step temperature alarm device from being damaged by an accident first, the step temperature alarm device is arranged on the side of the ring network cabinet. The step temperature alarm device and the ring network cabinet are separated and there is a distance of at least 30 cm between the step temperature alarm device and the ring network cabinet.

[0010] In order to spread the alarm information further, the remote alarm sending device is connected to the central control room and is used to send the temperature data signals measured by the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor to the central control room.

[0011] Beneficial effects: Each sensor is connected to an external power cord and an internal backup battery. When the external power supply fails to work properly, the internal backup battery can start immediately to ensure the normal operation of the sensor and improve the reliability of the system;

[0012] According to the monitored parameter threshold, different levels of alarm devices can be triggered, such as low-decibel whistle devices, medium-decibel whistle devices, and high-decibel whistle devices. When personnel are not in the central control room, the whistle devices will issue warnings at different loudness levels, which can clearly let personnel know the severity of the accident;

[0013] Through the coordinated work of multiple sensors, real-time monitoring and alarm of various parameters inside the ring network cabinet are achieved, with higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of a stepped alarm system for a ring main unit;

[0015] In the figure: 1. Outgoing line unit, 2. Main circuit breaker unit, 3. Rectifier unit, 4. Incoming line unit, 1-1. First temperature sensor, 2-1. Second temperature sensor, 3-1. Third temperature sensor, 4-1. Fourth temperature sensor, 6. Backup power cord, 7. Backup battery, 8. Step temperature alarm device, 8-1. Low-decibel whistle device, 8-2. Medium-decibel whistle device, 8-3. High-decibel whistle device, 8-4. Remote alarm sending device. DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0017] In this embodiment:

[0018] Please see Figure 1A step-type alarm system for a ring network cabinet includes an outgoing line unit 1, a main circuit breaker unit 2, a rectifier unit 3 and an incoming line unit 4, and also includes a first temperature sensor 1-1, a second temperature sensor 2-1, a third temperature sensor 3-1 and a fourth temperature sensor 4-1, wherein the first temperature sensor 1-1 is arranged in the outgoing line unit 1, the second temperature sensor 2-1 is arranged in the main circuit breaker unit 2, the third temperature sensor 3-1 is arranged in the rectifier unit 3, and the fourth temperature sensor 4-1 is arranged in the incoming line unit 4, and the first temperature sensor 1-1, the second temperature sensor 2-1, the third temperature sensor 3-1 and the fourth temperature sensor 4-1 are all connected to a power line, and the power line is the first temperature sensor 1-1, the second temperature sensor 2-1, the third temperature sensor 3-1 and the fourth temperature sensor 4-1. 4-1 provides an external power supply, the first temperature sensor 1-1, the second temperature sensor 2-1, the third temperature sensor 3-1 and the fourth temperature sensor 4-1 are also connected to the backup power line 6, the backup power line 6 is connected to the internal backup battery 7, the first temperature sensor 1-1, the second temperature sensor 2-1, the third temperature sensor 3-1 and the fourth temperature sensor 4-1 are all connected to the step temperature alarm device 8, the step temperature alarm device 8 includes a low-decibel whistle device 8-1, a medium-decibel whistle device 8-2, a high-decibel whistle device 8-3 and a remote alarm sending device 8-4, and also includes a partial discharge signal sensor arranged inside the ring network cabinet, the partial discharge signal sensor is connected to the low-decibel whistle device 8-1, the medium-decibel whistle device 8-2, the high-decibel whistle device 8-3 and the remote alarm sending device 8-4 in sequence.

[0019] In order to monitor various parameters inside the ring main unit, a pressure sensor is provided on one side of the first temperature sensor 1 - 1 , and the power line of the pressure sensor is connected in parallel with the power line connected to the first temperature sensor 1 - 1 .

[0020] In order to monitor various parameters inside the ring main unit, a gas sensor is provided on one side of the second temperature sensor 2-1, and the power line of the gas sensor is connected in parallel with the power line connected to the second temperature sensor 2-1.

[0021] In order to prevent the step temperature alarm device 8 from being damaged by an accident first, the step temperature alarm device 8 is arranged on the side of the ring network cabinet. The step temperature alarm device 8 is separated from the ring network cabinet and is at least 30 cm away from the ring network cabinet.

[0022] In order to spread the alarm information further, the remote alarm sending device 8-4 is connected to the central control room and is used to send the temperature data signals measured by the first temperature sensor 1-1, the second temperature sensor 2-1, the third temperature sensor 3-1 and the fourth temperature sensor 4-1 to the central control room.

[0023] When the local discharge signal sensor receives an abnormal local discharge signal inside the sensor, it will send data to the central control room, warn the personnel in the central control room, and provide data reference when the accident occurs.

[0024] The following is the specific operating principle:

[0025] The partial discharge signal sensor is installed inside the ring main unit. Its function in the stepped alarm system is to monitor partial discharge activities inside the ring main unit to prevent electrical equipment failures and accidents. The partial discharge signal sensor can detect tiny discharge phenomena caused by local defects or aging in the insulating medium of electrical equipment, and convert these signals into electrical signals for system analysis and processing.

[0026] When the local discharge signal sensor detects a partial discharge signal, the system will analyze the signal strength and characteristics to determine whether there is a potential failure risk. If the detected signal exceeds the preset threshold, the system will activate the alarm mechanism and trigger the low-decibel whistle device in the stepped alarm device to issue a preliminary warning. If the discharge phenomenon persists or intensifies, the system will activate the medium-decibel whistle device and the high-decibel whistle device in sequence to increase the alert level.

[0027] Specifically, when the intensity of the partial discharge signal detected by the local discharge signal sensor is weak but exceeds the preset threshold of the normal working range, the system will first activate the low-decibel whistle device 8-1 to issue a preliminary warning; the warning at this stage is intended to alert the operator or maintenance personnel that preliminary inspection and maintenance may be required; if the partial discharge phenomenon persists or the signal intensity increases, indicating that the risk of failure is increasing, the system will activate the medium-decibel whistle device 8-2; the warning level at this time is higher, intended to ensure that relevant personnel can quickly identify the severity of the problem and take appropriate measures; when the partial discharge phenomenon intensifies and the signal intensity significantly exceeds the preset threshold, the system will activate the high-decibel whistle device 8-3; this level of warning is urgent and requires immediate action, which may include immediate shutdown inspection or emergency maintenance. At the same time, the system will also send the alarm signal to the central control room or the maintenance personnel's mobile device through the remote alarm sending device. The remote alarm can provide real-time alarm information.

[0028] At the same time, according to the temperature detected by the temperature sensor, different levels of alarm devices are triggered. When the temperature exceeds the set threshold, a preliminary warning is issued. During the preliminary warning, the remote alarm sending device 8-4 sends an alarm signal to the central control room and triggers the low-decibel whistle device 8-1 at the same time;

[0029] If the temperature continues to rise, the medium-decibel whistle device 8-2 will be triggered to issue a second-level warning. During the second-level warning, the remote alarm sending device 8-4 will send an alarm signal to the central control room and simultaneously trigger the medium-decibel whistle device 8-2 to sound a buzzer. The medium-decibel whistle device 8-2 will also trigger a voice alarm to remind pedestrians to stay away.

[0030] When the temperature rises to a dangerous level, the high-decibel whistle device 8-3 will be triggered to issue a level 3 warning. When the level 3 warning is issued, the remote alarm sending device 8-4 will send an alarm signal to the central control room and simultaneously trigger the high-decibel whistle device 8-3 to sound a buzzer. The high-decibel whistle device 8-3 will also trigger a voice alarm to remind pedestrians to stay away.

[0031] As the temperature rises, a louder and wider alarm will be issued. When the temperature is 50 degrees to 70 degrees, the low-decibel whistle device 8-1 is triggered. When the temperature is 70 degrees to 90 degrees, the medium-decibel whistle device 8-2 is triggered. When the temperature is above 90 degrees, the medium-decibel whistle device 8-2 is triggered. When the equipment returns to normal operation, the low-decibel whistle device 8-1, the medium-decibel whistle device 8-2 and the high-decibel whistle device 8-3 stop running.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A step-by-step alarm system for a ring main unit, comprising an outgoing line unit, a main circuit breaker unit, a rectifier unit and an incoming line unit, characterized in that: The circuit breaker further comprises a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor, wherein the first temperature sensor is arranged in the outgoing line unit, the second temperature sensor is arranged in the main circuit breaker unit, the third temperature sensor is arranged in the rectifier unit, and the fourth temperature sensor is arranged in the incoming line unit. The first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all connected to a power line, which provides an external power supply for the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor. The first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are also connected to a backup power line, which is connected to an internal backup battery. The first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all connected to a step temperature alarm device, which comprises a low-decibel whistle device, a medium-decibel whistle device, a high-decibel whistle device and a remote alarm sending device. The circuit breaker further comprises a partial discharge signal sensor arranged inside the ring network cabinet, which is sequentially connected to the low-decibel whistle device, the medium-decibel whistle device, the high-decibel whistle device and the remote alarm sending device.

2. A stepped alarm system for a ring main unit according to claim 1, characterized in that: A pressure sensor is provided on one side of the first temperature sensor, and a power line of the pressure sensor is connected in parallel with a power line connected to the first temperature sensor.

3. A stepped alarm system for a ring main unit according to claim 1, characterized in that: A gas sensor is provided on one side of the second temperature sensor, and a power line of the gas sensor is connected in parallel with a power line connected to the second temperature sensor.

4. A stepped alarm system for a ring main unit according to claim 1, characterized in that: The step temperature alarm device is arranged on the side of the ring network cabinet. The step temperature alarm device and the ring network cabinet are separated and there is a distance of at least 30 cm between the step temperature alarm device and the ring network cabinet.

5. The step-by-step alarm system for a ring main unit according to claim 1, characterized in that: The remote alarm sending device is connected to the central control room and is used to send temperature data signals measured by the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor to the central control room.

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