scope of application

The HL-500 microcomputer protection device is a digital protection unit with current protection as its basic configuration, suitable for small current grounding systems in factories, mines, enterprises, and civil buildings with voltage levels of 10kV and below. It serves as the main and backup protection for various electrical equipment and lines.

functional configuration

1. Current quick break protection

2. Time limited quick break protection

3. Overcurrent protection

4. Overload protection: optional inverse time action characteristic

5. Zero sequence overcurrent protection

6. CT wire breakage detection

7. Control circuit disconnection

8. Non electricity protection: high temperature alarm, over temperature trip, light gas alarm, heavy gas trip

9. 8-way remote signaling input

10. Remote measurement: Ia、Ib、Ic、I0

main features

1. Adopting advanced 32-bit embedded ARM processors.

2. LCD screen display, user-friendly human-machine interface, easy and intuitive operation, convenient for installation, wiring, and debugging.

3. Complete software and hardware self-test, with SOE and self-test report for power down maintenance, and automatic alarm for device abnormalities;

4. Equipped with self-protection function, it can effectively prevent permanent damage to the device caused by wiring errors and abnormal operation. The software and hardware redundancy design of the second level watchdog has strong anti-interference performance.

5. Fully sealed metal chassis with strong electrical resistance, electromagnetic interference resistance, and mechanical vibration resistance, suitable for distributed on-site installation on switchgear.

Technical Parameter

1. Rated data

DC power supply:

220V ± 20% or 110V ± 20%

AC power supply:

85V~265V

Frequency:

50Hz

2. Power consumption

DC circuit:

≤5W

AC current circuit: ＜ 0.5VA/phase (rated at 5A)

3. Working environment

Environmental temperature:

-Ensure normal operation from 10 ℃ to+55 ℃

Relative humidity:

5-95%

Atmospheric pressure:

86～106KPa

4. Thermal stability