The SMS260 series of intelligent protection devices are specially developed for ring network cabinet system applications and can be integrated into circuit breaker cabinets. The device can simultaneously supply external power supply or can directly extract working and tripping energy from the current transformer. It can also achieve complete protection without auxiliary power supply. Overcurrent protection with multiple operating characteristic curves, zero sequence overcurrent Protection and external node direct trip function, it is very suitable for work and outdoor harsh environment, unattended transformer substation.
Technical features:
The high-integration, bus-free microprocessor handles the signal from the current transformer, and the output of the digital logic operation control device is compact. The sealed chassis is maintenance-free and has good anti-interference performance. It is suitable for the operating environment. Rigid, limited installation ring network cabinet system.
Product Features:
1) The whole machine adopts extremely low power design technology to ensure reliable and fast start of protection under any conditions.
2) The device structure is simple and compact, and the installation is convenient and flexible, which is suitable for the compact installation condition of the ring network cabinet.
The self-powered function (powered by the current transformer) can be selected to eliminate the additional burden of installing a DC screen or UPS.
3) The protection configuration is flexible and complete, and various protection functions can be freely invested through control.
4) A variety of IEC standard inverse time curve selection, with high current blocking protection function, suitable for use with a variety of circuit breakers, to solve the problem of power distribution system 扈 protection dead zone.
5) It adopts full Chinese LCD display interface, multi-layer menu display, and human-machine interface is extremely friendly.
6) The large-capacity memory of the device ensures that 200 historical event records are recorded, the recorded content is detailed, and data is not lost when power is lost.
7) The device has a complete dynamic and static self-checking function, and the working condition of each part of the online monitoring device ensures the reliability of the device.
8) High precision originals and processes ensure the accuracy, reliability and long service life of the device.
9) The device provides the RS-485 communication bus interface of the rear terminal, and provides an open communication protocol to the user to facilitate the implementation of the SCADA function.