YCH-281F Intelligent Arc Light Protection System

The arc light generated by short circuit faults in medium and low voltage busbars can cause great harm to equipment and personnel, and some may even trigger chain accidents. However, according to the current relay protection design standards in China, medium and low voltage bus systems are generally not equipped with dedicated fast bus protection, but rely on the backup overcurrent protection of the upper level component (transformer) to cut off bus short-circuit faults, resulting in prolonged fault removal time and increased equipment damage. This issue has attracted high attention from professionals in the industry.

The YCH-281F intelligent arc light protection system is specially designed based on the protection characteristics of medium and low voltage busbar systems. The YCH-281F arc light protection system consists of a main control unit and an arc light sensor, which can effectively prevent and reduce the harm of arc light. The system adopts the dual criteria principle of arc light detection and overcurrent detection, with fast action and high reliability. There are no special requirements for primary equipment, and it can be applied to industries such as power, petrochemical, metallurgy, etc. YCH-281F breaks through the problems of selectivity, sensitivity, and differential coordination in conventional protection, with simple use, wide protection range, and no special requirements for primary equipment, making it economically practical.

The action time of YCH-281F arc light busbar protection system is 7-10ms, which is much faster than traditional busbar protection. The short-circuit fault removal time in the switchgear can be controlled within 100ms. Therefore, this protection system can reduce fault losses to Low, creating conditions for quick handling of accidents and restoration of power supply.

The YCH-281F arc light busbar protection system has 6 arc light input channels, 1 incoming current, and 5 relay outputs, specifically designed for busbar arc light protection in situations where the busbar output scale is small (no more than 6 channels are present).

System features:
Adopting a high-performance 32-bit high-speed DSP single-chip digital signal processing controller as the main control unit.

Adopting the dual criteria principle of arc light and fault current, the action is reliable, fast, and the action time is 7-10ms, greatly reducing the degree of damage to the switchgear in accidents.

Continuous system self-test, capable of issuing alarm signals when faults such as wire breakage occur in the arc light sensor.

Fault location, the control part can display the location of the arc light occurrence point, making it convenient to quickly handle faults and restore power supply.

Adopting full AC digital sampling, with no adjustable components for sampling and tuning, the impact of hardware circuit zero drift is completely eliminated. By using software digital filtering and high-speed floating-point operations, the measurement accuracy is greatly improved. The channel error is less than ± 1%.

The device has a complete self checking function; The three-level Watchdog and power monitoring function ensure the reliable operation of the device.

The display module has a user-friendly human-machine interface, with all interfaces and menus displayed in Chinese for easy operation; All measured and parameters can be displayed in real-time through the display module.

Adopting RS485 communication port, supporting the internationally popular MODBUS communication protocol, to achieve information upload and distribution;

All key data (system parameters, etc.) can be saved for more than ten years in the event of power failure;

Complete accident recording and self checking functions, friendly human-machine interface.

Sampling technology indicators:

Display module:

Communication:

Switch input:

Relay output:

power supply