Arc light protection system

HG-ARC is a modular system, which consists of the general control unit of the communication management machine, the arc light protection unit, the arc expansion unit and the arc light unit. The arc unit consists of a arc probe, a special optical fiber, a photoelectric converter, and the arc probe is connected through the optical fiber in the optical fiber and the protection device (for example, increasing the number of probes, It can be realized by arc expander. The arc sensor, arc expander and arc probe are connected by special optical cable.

Because of the configuration modularization, the system is suitable for various applications of arc light protection in various situations. It can form a simple system with only one bus arc light protection unit, which can be used as a complex system that contains multiple units and can be used for selective arc protection.

Through communication between the communication management unit and the station monitoring system, the bus arc protection unit and the feeder arc protection unit can be equipped with 2 Road Ethernet, 1 road 485 and 1 CAN ports, and the communication protocol support department gives IEC60870-5-101, 104 and ModBus, IEC61850 and other common communication specifications.

2.HG-ARC arc light protection device

Brief introduction of 2.1 arc light protection device

The arc light protection device is the core component of the arc light protection system. It is responsible for the acquisition, measurement, calculation and logical judgment of the input quantity, and realizes the protection logic of the system, the communication with the monitoring system in the station, the self inspection and other auxiliary functions.

The device chassis adopts the original "pre-plug and post-plug" structure, that is, the LCD display panel is pre-plugged, other plug-ins are post-plugged, easy to maintain.

Working principle of 2.2 arc light protection device

Arc light protection is grouped on the basis of current units. Arc light probe can be tuned and correlated to any group of current signals. When the arc unit transfers the light signal from the arc sensor to the main control unit, and at the same time the current starts the element action and the arc light protection action; the device can choose the arc signal action single criterion as the action logic judgment.

Technical features of 2.5 device

HG-ARC electric arc light protection device is based on the micro computer application technology developed with excellent performance of high and new power automation products, its characteristics are as follows:

(1) HG-ARC arc light protection device has a variety of data acquisition and processing capabilities;

(2) The overall design is digital, complete and modular, which is convenient for production debugging and on-site operation and maintenance.

(3) complete circuit breaker control circuit;

(4) friendly man-machine interface, navigation menu operation, simple, convenient and intuitive;

(5) adopting the dual criteria of overcurrent and arc, high reliability and conforming to electromagnetic compatibility standard;

(6) new optical fiber connection and transmission, photoelectric conversion completed in the device, strong electromagnetic interference resistance;

(7) the new ultraviolet light sensor and visible light sensor with filtered interfering light have the function of filtering interference light and avoiding the error of the visible light sensor caused by the influence of ambient light.

(8) the outlet trip time is less than 20ms, much faster than the traditional busbar protection, and the total removal time of internal arc fault of switchgear can be controlled within 100ms.

(9) logic programmable gate exit;

(10) each functional module is relatively independent and improves the reliability of the system. The device integrates various functions such as measurement, control, communication and so on, and can control operation locally and far away.

(11) measuring the data of multi analog arc sensor, the data of the arc sensor can be quantified, the accuracy of the light intensity is not more than 10%, and the multi-channel nonlinear arc sensor can be accessed. The arc light criterion can make the difference between the dry light source and the arc light according to the 2 key indexes of the light intensity and the spectral composition, and achieve 1. 00% accurate action;

(12) the wiring is convenient, and is suitable for three phase, three wire or three phase four wire systems of all kinds of high voltage and low voltage systems.