Intelligent Arc Protection Device
The intelligent arc light protection device is specially designed according to the protection characteristics of the medium and low voltage busbar system, which can effectively prevent and reduce the harm of arc light. There are no special requirements for primary equipment, and it can be used in electric power, petrochemical, metallurgy and other industries. The intelligent arc protection device developed by KAICH breaks through the problems of selectivity, sensitivity, etc. in conventional protection. It is easy to use, has a wide range of protection, and has no special requirements for primary equipment.
Feature
★Using high-performance 32-bit high-speed DSP microcontroller digital signal processing controller as the main control unit,
★Using the principle of arc light and fault current double criterion, reliable action, fast speed, and a 7m. action time. Greatly reduce the loss of switchgear in accidents
bad degree.
★Continuous system self-inspection, when the arc sensor is disconnected and other faults, it can send out an alarm signal.
★Fault point location, the control part can display the location of the arc light occurrence point, which is convenient to quickly deal with the fault and restore the power supply.
★Adopt full AC digital sampling, no adjustable components for sampling and setting, which completely eliminates the influence of zero drift of hardware circuit. using software digital filter
Wave, high-speed floating-point number operation, greatly improve the measurement accuracy. The channel error is less than ±1%.
★The device has a complete self-checking function: Watchdog7 and power monitoring function to ensure the reliable operation of the device.
★The display module has a friendly man-machine interface, all interfaces and menus are displayed in Chinese, which is easy to operate: all measured and parameters can be displayed through the display
The module is displayed in real time.
★Adopt RS485 communication port, support the international popular MODBUS communication protocol, realize the uploading and sending of information.
★All key data (system parameters, etc.) can be saved for more than ten years in case of power failure.
★Perfect accident record and self-check function, friendly man-machine interface]
★The zero-sequence channel can be synthesized or externally connected to zero-sequence CT.
★The device adopts a fully sealed embedded structure, software and hardware redundant design, perfect software and hardware self-checking, and strong anti-interference performance.
★The definition of relay output is flexible, and a variety of protection action logic can be provided according to user requirements.
KCFB-306 arc protection system consists of main control unit, arc expansion unit, current unit and arc sensor.
Main Components
The main control unit is used to manage and control the entire arc protection system. It detects fault current and arc signals, and performs
Processing and judgment, when the tripping conditions are met, a tripping command is issued to remove the fault. The main control unit has flexible parameter configuration function. master control sheet
It can meet the protection of two busbars at the same time, and each arc input unit and current signal can be pulled into the busbar or busbar according to user settings.
★10-channel arc light input (expandable to 10+10-channel arc light input, optional)
★ 2-way three-phase current acquisition and zero-sequence current acquisition (each input IA, IB.IC, IO, rated current 5A or 1A optional).
★Adopt the current abrupt amount of air supply and steady-state overcurrent criterion.
★ 5-way switch input (input voltage DC 110V or 220V, optional).
★8-channel large-capacity relay output (programmable output).
★ circuit breaker failure protection.
★The action of air supply is that the current and arc light occur at the same time or only the arc light occurs. The current signal collects the analog signal for the main control unit or accesses it externally
The open input signal of the stream module.
★1 channel S485 network communication (optical isolation)
★1-way CAN network communication (photoelectric isolation)
★5-7ms action time (including relay output) adopts high-performance 32-bit high-speed DSP single-chip digital signal processing controller as the main control unit
★Continuous system self-inspection, when the arc sensor is disconnected and other faults, it can send out an alarm signal.
The arc main control unit can input 20 arc signals at most. When the number of detection points exceeds 20, the arc expansion unit can be used.
★16-channel solitary light input,
★2-way RS485 network communication (optical isolation)
★Continuous system self-inspection, when the arc sensor is disconnected and other faults, it can send out an alarm signal.
★1-way CAN network communication (photoelectric isolation).
The current unit is used as an auxiliary unit for the arc protection system to judge whether there is a short circuit. When the number of current channels of the main control unit is not enough or an external power supply is used
When the current module judges whether there is an overcurrent, the switch output of the current unit can be selected as the basis for judging whether there is an overcurrent. In addition, the current unit can be combined with the arc protection system (KCFB-306A) to form a protection system based on the principle of arc and current double criteria.
★ 1-way three-phase current acquisition and zero-sequence current acquisition (input 1A, B, 1C.1O, rated current 5A or 1A optional).
★ 2-way large-capacity relay output.
★1 channel S485 network communication (optical isolation)
★1-way CAN network communication (photoelectric isolation)
Use environment
KCFB-306 products can work normally for a long time in the following environments:
Relative humidity: <95%
Working temperature: -5C~+45C
Atmospheric pressure: 86~106kpa
Exceeding the specified environmental requirements, the operating life of the instrument may be affected