CN204556765U - A kind of leakage current detect system - Google Patents

Abstract

The utility model provides a leakage monitoring system, comprising: a monitoring host that can be connected to an upper computer and a zero-flux leakage detection transformer arranged on an electrical device; the zero-flux leakage detection transformer and the monitoring host are connected through a serial bus connection; the monitoring host can be connected electrically and/or wirelessly with the upper electromechanical; the monitoring host is provided with a current detection alarm processing device. The zero-flux leakage detection transformer is connected to the monitoring host through a serial bus, which improves the sensitivity of the transformer. The current detection and alarm processing device provided by the monitoring host can give an alarm according to the leakage current rating, and determine the degree of leakage fault and Determine when to overhaul, and at the same time, the current detection and alarm processing device can indicate the trip action time and trip setting value to prevent large-scale power outages caused by overstepping trips, so as to realize the monitoring of the leakage degree of the power supply system and provide shutdown maintenance instruction information to ensure The reliable power consumption of users such as industrial and mining enterprises cannot be shut down at any time.

Description

A Leakage Monitoring System

technical field

The utility model relates to the technical field of electricity system leakage monitoring, in particular to a leakage monitoring system.

Background technique

With the rapid development of the national economy, the number of industrial and mining enterprises has gradually increased. Due to the frequent occurrence of hazards caused by electrical equipment leakage, the reliability and accuracy of the leakage monitoring system have become the basic guarantee for safe production.

In the existing leakage monitoring system, the leakage relay is often set up to prevent equipment accidents or electrical fires caused by the ground fault current when the leakage occurs. However, the existing leakage processing mechanism is for users who cannot shut down at any time Such as industrial and mining enterprises) after the leakage relay completes the protection, it causes economic losses caused by shutdown and production stoppage.

Therefore, there is an urgent need for a leakage monitoring system to monitor the degree of leakage and provide shutdown maintenance instructions to ensure reliable electricity consumption for users such as industrial and mining enterprises that cannot be shut down at any time.

Utility model content

In view of this, the utility model provides a leakage monitoring system to realize the monitoring of the leakage degree of the power supply system and provide shutdown maintenance indication information to ensure reliable power consumption of users such as industrial and mining enterprises that cannot be shut down at any time.

A leakage monitoring system, comprising: a monitoring host that can be connected to a host computer and a zero-flux leakage detection transformer arranged on an electrical device;

The zero-flux leakage transformer is connected to the monitoring host through a serial bus;

The monitoring host can be electrically and/or wirelessly connected to the upper machine;

The monitoring host is provided with a current detection alarm processing device.

Preferably, the zero-flux leakage transformer is equipped with a microcrystalline iron core.

Preferably, the serial bus is an RS485 data bus.

Preferably, the monitoring host is provided with a storage module.

It can be seen from the above-mentioned technical scheme that the zero-flux leakage detection transformer in the embodiment of the utility model is connected with the monitoring host through a serial bus, which improves the sensitivity of the transformer. The current detection alarm processing device set by the monitoring host According to the grading and alarming of the leakage current, the degree of the leakage fault can be judged and when to repair it. At the same time, the current detection and alarm processing device can indicate the trip action time and the trip setting value, so as to prevent the large-area power failure caused by the overstepping trip, so as to realize the maintenance of the power supply system. Monitor the degree of leakage and provide shutdown maintenance instructions to ensure reliable power consumption for users who cannot shut down at any time, such as industrial and mining enterprises.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of an electric leakage monitoring system disclosed in an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The embodiment of the utility model discloses a leakage monitoring system, which realizes the monitoring of the leakage degree of the power supply system, and provides shutdown maintenance indication information, so as to ensure reliable power consumption of users such as industrial and mining enterprises who cannot shut down at any time.

Figure 1 shows a leakage monitoring system, including:

A zero-flux leakage detection transformer 1 arranged on the electrical equipment;

And, the monitoring host 2 that can be connected with the host computer 3;

The zero-flux leakage transformer 1 is connected to the monitoring host 2 through a serial bus;

The zero-flux leakage transformer 1 is arranged on the electrical equipment to be detected, and the position of the electrical equipment to be detected can be accurately positioned through the zero-flux leakage transformer 1;

The zero-flux leakage transformer 1 is equipped with a microcrystalline iron core, and the microcrystalline iron core has zero-flux working characteristics, and has a very high initial magnetic permeability; it has a high insertion loss in the line, and has a good frequency characteristics and temperature stability, and effectively suppress common mode noise. The sensitivity of the transformer is improved. The zero-flux leakage current transformer 1 sends leakage current data to the monitoring host 2 through a serial bus.

The monitoring host 2 can be provided with a display unit to display the leakage information of a certain zero-flux leakage transformer, and form a real-time trend curve, which is helpful for maintenance personnel to accurately judge the insulation status of the system and plan maintenance.

The monitoring host 2 can be electrically and/or wirelessly connected to the host computer 3;

The monitoring host 2 can exchange data with the upper computer 3 through the TCP/IP protocol to realize communication networking. The upper computer 3 displays leakage data in real time and can retrieve historical alarm data to realize remote monitoring and management.

The monitoring host 2 is provided with a current detection alarm processing device;

The monitoring host 2 is based on the current detection and alarm processing device. The current detection and alarm processing device may include an acquisition unit and a microprocessor, but is not limited to the above configuration. The current detection and alarm processing device collects the zero magnetic flux leakage mutual inductance According to the leakage current value of device 1, and alarm, according to the leakage current value is divided into 80mA, 150mA, 300mA, 500mA. When the monitoring host 2 detects that the leakage current value exceeds a certain alarm setting value, it sends out an alarm, and adjusts to the next level of setting value after an automatic delay; judges the leakage fault level according to the time between alarms to prompt maintenance information; The corresponding tripping action time and tripping setting value can be set according to the working conditions of the site to prevent large-scale power outages caused by overstepping trips and users who cannot stop at any time.

The monitoring host 2 and the zero-flux leakage current transformer 1 adopt RS485 data bus for transmission, and can monitor up to 128 lines, which are anti-interference, low in cost, and easy to install.

Preferably, the monitoring host 2 is provided with a storage module.

The monitoring host 2 can use the storage module to automatically archive alarm and trip records, and support query and upper computer 3 query and printing, providing reference data for maintenance personnel to formulate maintenance plans.

It should be noted that the leakage monitoring system is suitable for residential areas with relatively dense electrical equipment, and for users who cannot stop at any time, such as: mining, coal, chemical, steel, textile and other industries and large-scale commercial power supply systems. Leakage monitoring alarm; low-voltage high-current system power supply terminal line insulation deterioration monitoring alarm, motor turn-to-turn short-circuit fault alarm; low-voltage small current system electrical leakage classification alarm; single-phase grounding line selection alarm, etc.

However, it is not limited to the range of applications listed above.

In summary;

The zero-flux leakage detection transformer in the embodiment of the utility model is connected to the monitoring host through a serial bus, which improves the sensitivity of the transformer. The current detection and alarm processing device set by the monitoring host can give an alarm according to the leakage current rating and judge The degree of leakage fault and the determination of when to repair it. At the same time, the current detection and alarm processing device can indicate the trip action time and trip setting value to prevent large-scale power outages caused by overstepping trips, thereby realizing the monitoring of the leakage degree of the power supply system and providing shutdown. Maintenance instruction information to ensure reliable power consumption of users such as industrial and mining enterprises that cannot be shut down at any time.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. A leakage monitoring system, characterized in that it includes: a monitoring host that can be connected to an upper computer and a zero-flux leakage detection transformer that is arranged on an electrical device; The zero-flux leakage transformer is connected to the monitoring host through a serial bus; The monitoring host can be electrically and/or wirelessly connected to the upper machine; The monitoring host is provided with a current detection alarm processing device. 2. The leakage monitoring system according to claim 1, characterized in that said zero-flux leakage transformer is equipped with a microcrystalline iron core. 3. The electric leakage monitoring system according to claim 1, wherein the serial bus is an RS485 data bus. 4. The electric leakage monitoring system according to claim 1, wherein the monitoring host is provided with a storage module.