ZF300 digital microcomputer protection device is suitable for low current/small resistance grounding system of 35kV and below, which integrates functions of protection, control, communication and monitoring. The device uses component programmable design ideas to reduce maintenance workload and spare parts. It can flexibly meet the needs of a variety of applications, and is the ideal replacement for traditional electromagnetic relay protection.
ZF300 integrated microcomputer protection device:
■ Feed (feed) line protection
■ Maternal protection
■ Transformer protection
■ Motor protection
■ Capacitor protection
■ Single PT protection
■ Incoming line automatic switching protection
■ Maternal automatic switching protection
Main features
- High-performance 32-bit digital signal processor (DSP) provides powerful computing processing, clean circuit design, and industrial-grade components to ensure stable and reliable operation.
- Unique component level – engineering level – user level three level programming mode, component type can be set on site. The digital input and relay output are programmable.
- High-speed, high-precision AC signal measurement with sampling frequency up to 1600Hz. Multiple AC signal FFT calculations are done in milliseconds. The sampled values are digitally corrected and effectively suppress noise and offset.
- Powerful vectorization calculation method, can obtain a variety of derived AC signal characteristics, including positive, negative, zero sequence, phase-to-line transformation, angle, impedance, power and so on.
- It is able to continuously record 64 events, with full event record of protection action with fault time, type and peak value.
- Graphical LCD display (128×64), graphics, icons and full English display.
- The main signal circuit is equipped with an electromagnetic interference absorbing element to meet the working environment in a harsh electromagnetic environment.
- Enhanced MODBUS communication interface, in addition to normal data, can also transmit real-time waveforms, vector data, and so on.
- Complete self-test function, including tuning parameters, recording, operation loop, current, voltage loop and other abnormal monitoring.
- Fully enclosed thin metal case, waterproof, dust-proof, and has strong anti-static and electromagnetic interference capability; it can be installed on the switch cabinet in a distributed way, or it can be concentrated on the group screen.
- Surface mount technology, important components (such as power modules, transformers, relays, LCDs, terminals, etc.)
- Adopt mature products from well-known enterprises at home and abroad to ensure that the average time between failures of the devices is more than 100,000 hours.