● Ambient temperature:

● Working: -25 ℃ ~ + 55 ℃

● Storage: -25 ℃-+ 70 ℃ relative humidity is not more than 80%, the surrounding air does not contain acid, alkali or other corrosive and explosive gas in the rainproof and snowproof room; no excitation is applied under the limit value There is no irreversible change in the device. After the temperature is restored, the device should be able to work normally.

● Relative Humidity: The average monthly maximum relative humidity of the wettest month is 90%, meanwhile, the average monthly minimum temperature of the month is 25 ℃ and the surface is non-condensing

● When the maximum temperature is + 40 ℃, the average maximum humidity does not exceed 50%.

● Atmospheric pressure: 80kPa ~ 110kPa (relative altitude below 2km).

main feature

● The device has high stability and reliability, and can work in harsh environments such as high-voltage switchgear;

● Strong anti-interference performance, a variety of isolation and shielding measures are adopted in the device hardware design, software design uses digital filtering technology and good protection algorithms and other anti-interference measures, which greatly improves the anti-interference performance of the device;

● The hardware and software design is standardized and modular, which is convenient for on-site maintenance;

● The man-machine interface of the device is powerful, meets the requirements of ergonomic design, menu design, full Chinese display, easy operation and debugging, and the general operating personnel can be proficient in operation by referring to this manual;

● 10 sets of protection fixed values can be independently set, and the switching of fixed value areas is safe and convenient;

● It can save the last 20 fault reports with action parameters, and keep it when power off, which is convenient for accident analysis;

● Industrial-grade RS-485 bus network, economical and convenient networking, can directly communicate with microcomputer monitoring or protection management machine;

● The device uploads fault information, real-time status quantity, real-time analog quantity through communication, and can perform real-time time correction, fixed value calling and modification, fixed value area switching, remote control closing, remote control tripping and other operations.

technical parameter

Device rated data

● Rated auxiliary voltage: 220V or 110V AC / DC universal);

● Rated AC data: AC current: 5A AC voltage: 100 / 3V, l00V

                  Zero sequence current: 1A; Rated frequency: 50Hz;

● Thermal stability: AC current loop: long-term operation 21n; 10s 10ln; 1s 401n;

                 AC voltage circuit: long-term operation 1.2Un; 10s 1.4Un;

● Dynamic stability: Half cycle: 100In

Power consumption Power consumption ((w at rated state)

● Auxiliary voltage circuit: no more than 10W in normal operation, no more than I5W in operation;

● AC current loop: when In = 5A, each phase is not greater than 1VA; when In = 1A, each phase is not greater than 0.5VA;

● AC voltage circuit: each phase is not greater than 0.5VA