In the distributed photovoltaic grid-connected, due to external reasons or other reasons caused the power grid power outage, it is likely to cause a distributed power plant system Island operation, which for the field of power generation equipment and system damage is very large, the general inverter power generation system comes with anti-island function, but in order to safe and reliable, External and Dot can also install anti-island protection device, in the event of islanding, as backup protection can quickly cut out the distributed Island power supply, ZF868 can fully meet this function. ZF868 PV Grid-connected anti-islanding protection device, set protection, control, communication, monitoring and other functions and integration, the use of component programmable design ideas to reduce the maintenance workload and spare parts.
Features
- High-performance 32-bit digital signal processor (DSP), providing powerful computing processing capability, reliable circuit design, equipped with industrial-grade components, ensure the stable and reliable operation of the device.
- Unique component level-engineering level-User level Three-level programming mode, the component type can be set on-site. Programmable switching input and relay output.
- High-speed, high-precision AC signal measurement, sampling frequency up to 6400Hz. The FFT calculation of multiple AC signals is done in the millisecond level. Digital correction of sampled values and effective suppression of noise and offsets.
- Powerful vectorization calculation method, which can obtain a variety of derivative AC signal characteristics, including phase-to-line transformation, angle, impedance, power, four-image rationing energy metering, etc.
- Capable of recording 30 consecutive events, with time, type, peak protection action full event record.
- Graphical LCD display (128×64), graphics, icons and all English displays.
- The main signal circuit is equipped with electromagnetic interference absorbing elements, whichcan meet the working environment in the harsh electromagnetic environment.
- Enhanced Mod bus Communication interface, in addition to normal data, can also transmit real-time waveform, vector data, etc.
- Perfect self-test function, including setting parameters, recording, Operation Circuit, current,voltage circuit and other abnormal monitoring.
- Fully enclosed thin metal chassis, waterproof, dust-proof, and has a strong anti-static,electromagnetic interference ability.
- Surface-mount process, important devices (such as power modules, transformers, relays, LCD monitors, terminal blocks, etc.)Both domestic and foreign well-known enterprises mature products, to ensure that the average failure time of the device is more than 100,000 hours.