CN205429692U - Arc light ground protection controller device - Google Patents

Abstract

The utility model discloses an arc light grounding protection controller device, comprising: an arc light monitoring unit, an overcurrent detection unit, an arc light protection module, an action unit and an alarm unit. The arc light monitoring unit includes an arc light sensor to collect and send arc light signals to the arc light protection module , the overcurrent detection unit sends the overcurrent signal to the arc protection module, and the microcontroller of the arc protection module will compare and analyze the signal, and then output the signal to the electromagnetic relay of the action unit to control the electromagnetic relay to make corresponding protection actions, and The buzzer alarm that triggers the alarm unit emits a sound alarm, and the arc protection module is connected to the adjacent arc protection module through the bus output port to realize data sharing, and has the function of early prevention for fault prediction on the adjacent side. The utility model has the advantages of simple design, stable signal transmission, strong anti-interference ability and rapid arc protection response during the whole use process of the device.

Description

An arc light grounding protection controller device

technical field

The utility model belongs to the electrical field, in particular to an arc light grounding protection controller device.

Background technique

Arc discharge is a very common phenomenon in switchgear and it will cause different degrees of damage to equipment with different arc occurrence times. Air is a good insulator under normal conditions, but when its chemical and physical properties change due to temperature rise or other external factors, it may become a conductive conductor. When the air is broken down, it is easy to form arc. If the arc light is not cut off in time, it can be said to be a devastating blow to the equipment, because the arc light can not only cause the burning of insulating materials, but also melt copper bars, damage transformers, burn switch cabinets, and even spread to adjacent switch cabinets, thus cause immeasurable losses.

The existing arc light grounding protection device generally adopts the transformer backup overcurrent protection scheme. Since the action time limit of the main transformer backup protection must cooperate with the overcurrent protection of the outgoing line and the section switch to provide selectivity according to the ladder principle, this protection scheme is adopted. The removal time of the bus fault is relatively long, and the protection trip time is generally set at 1.5-2.0 seconds, and some even as long as 2.0-2.6 seconds. When breakdown discharge and arc discharge faults occur in large-capacity electrical equipment, cutting off the arc quickly can reduce or avoid the damage caused by the arc to electrical equipment and personnel.

Utility model content

The purpose of this utility model is to provide an arc light grounding protection controller device, which not only ensures the sensitivity, selectivity and instantaneity of arc light protection, but also reduces investment and operation costs.

The specific scheme is as follows: an arc light grounding protection controller device, including: an arc light monitoring unit, an overcurrent detection unit, an arc light protection module, an action unit and an alarm unit, and the arc light detection unit includes an arc light sensor for detecting arc light and Send an arc detection signal; the overcurrent detection unit compares the output current with the set current and sends an overcurrent comparison signal; the arc protection module includes a micro-controller and its control circuit; the arc detection The output end of the unit and the output end of the overcurrent detection unit are connected to the input end of the arc protection module; the output ends of the arc protection module are respectively connected to the action unit and the alarm unit; the action unit includes an electromagnetic relay, receiving After receiving the electrical signal output by the arc protection module, the power is cut off; the alarm unit includes a buzzer sensor, which emits a sound after receiving the electrical signal output by the arc protection module.

Further, the arc protection module further includes a button and a button control circuit connected to the microcontroller, and the output of the arc protection module is cut off by pressing the button.

Further, the arc protection module further includes a bus port and a bus port control circuit connected to the microprocessor, through which signals are input or output.

Further, the arc protection module is connected to the adjacent arc protection module through the bus port.

Compared with the prior art, the utility model has the following advantages:

1. The arc protection module is connected to the adjacent arc protection module through the bus output port to realize data sharing, and has the function of preventing faults occurring on the adjacent side in advance;

2. The design is simple, the device has stable signal transmission, strong anti-interference ability, and quick arc protection response during the whole use process.

Description of drawings

Fig. 1 is a structural block diagram of an embodiment of the present invention.

Fig. 2 is a basic structural diagram of the arc protection module of the embodiment of the present invention.

detailed description

In order to further illustrate various embodiments, the utility model provides accompanying drawings. These drawings are part of the disclosure content of the present invention, which are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementations and advantages of the present utility model. The utility model is further described now in conjunction with accompanying drawing and specific embodiment.

Referring to Fig. 1, the embodiment of the utility model is provided with an arc monitoring unit, an overcurrent detection unit, an arc protection module, an action unit, and an alarm unit.

The arc light monitoring unit adopts an arc light sensor. The arc light sensor probe collects the arc light signal, converts the ultraviolet light of the arc light into a transmittable optical signal, and then transmits the arc light signal through the optical fiber, and transmits the obtained signal to the arc light protection module;

The overcurrent detection unit will detect the current connected to the incoming line (not shown in the figure) between the power supply and the busbar or the feeder (not shown in the figure) between the busbar and the switchgear After the output current of the transformer (not shown in the figure) is compared with the set current, an overcurrent comparison signal is sent to the arc protection module;

Arc protection module, the arc protection module includes a MCU (microcontroller) and the corresponding micro-control circuit, the arc protection module plays the role of arc protection, processes the signals sent by the arc sensor and the overcurrent detection unit, and separates the processed signals Transmit to the action unit and alarm unit, and share the processed data with other arc protection modules through bus transmission;

The action unit is an electromagnetic relay, and the arc protection module transmits the electrical signal to the relay, and the relay is energized to make corresponding protection actions;

The alarm unit is a buzzer sensor. After receiving the signal from the arc protection module, it indicates the corresponding fault by the length and number of sounds.

In conjunction with Figure 2, the basic structure of the arc protection module of this embodiment is shown. The terminals on the left side of the module are the overcurrent component input port, the arc signal input port and the BLOCK key; the right side of the module is the action output port, including alarm output, bus connection , Action signal output. As shown in Figure 2, the arc signal detected by the arc sensor is received through the arc signal input port. When an overcurrent is detected, it is transmitted to the arc protection module through the input port of the overcurrent component. This module contains the BLOCK key, which can be used to block output actions through the BLOCK function. When an arc fault is detected, a high level will be output at the "bus connection" port, and this port will be output to the adjacent arc protection module as the "bus connection" input of this device, through which multiple use arc protection Modules exchange information between devices. After the arc protection module processes the collected data, it controls the action of the buzzer alarm and the electromagnetic relay according to the judgment. There are several ways to trigger actions:

When the arc sensor detects the arc on the protected equipment, the arc protection module will work, and the action is only affected by the arc signal;

When an overcurrent occurs, the arc protection module will act, and the action is only affected by the overcurrent;

When the arc light and the overcurrent act at the same time, the arc light protection module will act, and the action will be affected by the overcurrent and the arc light at the same time.

Although the utility model has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that, without departing from the spirit and scope of the utility model defined by the appended claims, changes in form and details may be made. Making various changes to the utility model is within the protection scope of the utility model.

Claims (4)

1. an arc grounding protection control device; including: arc light monitoring unit, over-current detection unit, arc protection module, motor unit and alarm unit; described arc light detecting unit includes arc photosensor, is used for detecting arclight concurrent power transmission arc light detecting signal；Described over-current detection unit will export electric current and set current ratio relatively, be transmitted across flowing comparison signal；Described arc protection module includes a microcontroller and control circuit thereof；Described arc light detecting unit output and over-current detection unit output are all connected with described arc protection module input；Described arc protection module output is connected with motor unit, alarm unit respectively；Described motor unit includes an electromagnetic type relay, carries out power-off after receiving the signal of telecommunication of arc protection module output；Described alarm unit includes a buzzing sensor, sends sound after receiving the signal of telecommunication of arc protection module output.

Arc grounding the most according to claim 1 protection control device, it is characterised in that described arc protection module also includes a button and the key control circuit being connected with described microcontroller, by button operation to cut off the output of arc protection module.

Arc grounding the most according to claim 1 protection control device, it is characterised in that described arc protection module also includes a bus port and the bus port control circuit being connected with described microcontroller, is inputted by bus port or output signal.

Arc grounding the most according to claim 3 protection control device, it is characterised in that described arc protection module is connected with adjacent arc protection module by bus port.