Microcomputer protection device (miniaturization)
WXH-8G(L) series of microcomputer protection device is my company in order to adapt to the power system of power plants, substations, distribution stations and other requirements for relay protection and specially developed a new generation of microcomputer type relay protection equipment. For 35KV and below voltage level overhead lines, cable lines, transformers, motors, capacitors, PT and other primary equipment to provide perfect protection function. The appearance of the product has been carefully designed, small and exquisite, and can be directly installed on the ring network switch cabinet and various circuit breaker cabinets, and can also be installed on the centralized screen.
- Product Description
- Technical features
- Main technical parameters
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- Commodity name: Microcomputer protection device (miniaturization)
WXH-8G(L) series of microcomputer protection device is my company in order to adapt to the power system of power plants, substations, distribution stations and other requirements for relay protection and specially developed a new generation of microcomputer type relay protection equipment. For 35KV and below voltage level overhead lines, cable lines, transformers, motors, capacitors, PT and other primary equipment to provide perfect protection function. The appearance of the product has been carefully designed, small and exquisite, and can be directly installed on the ring network switch cabinet and various circuit breaker cabinets, and can also be installed on the centralized screen.
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- Using the latest high-integration microcontroller development platform, the bus is not a chip, and the anti-interference performance is good.
- Using a unified hardware framework, software platform, product consistency is good.
- The device adopts fully sealed aluminum alloy structure, with strong anti-electromagnetic interference ability, small appearance and easy installation.
- The protection function configuration is flexible and complete, and all kinds of protection functions can be cast and retreated through the control word.
- Analog input, switch input, power input and communication interface part of the transformer isolation, photoelectric isolation, TVS protection anti-interference measures, making the device particularly strong anti-interference ability.
- The device has a perfect self-checking function. When the device is found to be working abnormally, the protection outlet is reliably locked to ensure that the device does not malfunction. Using a dedicated clock chip, supported by a separate crystal oscillator, with a backup battery, the clock can run correctly even after the device is powered off, so that the device can accurately record various fault information.
- The device has three-level watchdog, external hardware watchdog, CPU hardware timer watchdog and software watchdog to ensure that the device will not crash under any circumstances.
- With high-speed photoelectric isolation RS485 communication interface, communication is stable and reliable, and provides users with open communication protocols to facilitate the realization of integrated automation.
- The software in the device adopts modular design, has a variety of redundant measures, and has been tested for a long time on-site operation, and the program runs stably and reliably.
- It adopts full Chinese LCD display interface, multi-layer menu display, rich display information, friendly man-machine interface, and can complete debugging work without complicated training.
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Technical terms Technical parameters Working environment Ambient temperature:-20 ~ +60 7; relative humidity: 5 ~ 95%; atmospheric pressure: 86-106KPa; Main electrical technical parameters Operating power supply: AC/DC85-265V, allowable deviation ± 20%, ripple coefficient no more than 5%; AC current: rated 5A or IA (indicated when ordering); AC voltage: 10OV (line voltage); Rated frequency: 50Hz; Power consumption DC circuit is not more than 5W, AC circuit is not more than 0.5VA; Accurate measurement range: phase current 0.1 ln-20ln, zero sequence current 0.1 A- 6.25A, voltage 5V-160V; Measurement accuracy: current 0.5 level; voltage 0.5 level; Protection action time: the inherent action time of all protections under 1.5 times of the fixed value is not more than 35ms; Open loop: DC 24V, 5mA (provided inside the device); Contact opening: continuous connection of AC/DC220V, 5A current (pure resistive load); Insulation resistance: 250MQ; Dielectric strength: 2kV, 50Hz, 1min; Impulse voltage: 5kV, (1.2/50)μs; vibration shock Comply with the relevant provisions of IEC60255-21-1 3.2.1 and 3.2.2; Comply with the relevant provisions of GB/T14537-1993 4.2.1 and 4.2.2; Collision Comply with relevant provisions 4.3 in GB/T14537-1993; Anti-electromagnetic interference performance Able to withstand the attenuation shock wave pulse interference test with frequency of IMHZ and IoOKHz, voltage amplitude of common mode 250OV, and differential mode IOOoV; Can withstand the IECIOoo-4-2 standard IV, test voltage 8kV electrostatic discharge test; Can withstand the IECIOOO-4-3 standard Ill level, interference field intensity of 10 V/m radiation electromagnetic interference test; Can withstand IECIOoO-4-4 standard class IV fast transient interference test; Can withstand the surge immunity test with severity level of Ill specified in GB/T 14598.18-2007; Overload capacity 2 times rated current: continuous operation; 10 times rated current: 16s; 20 times rated current: 1s;
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