Features
- Continuous system self-supervision
- Event logs, disturbance recording and real-time clock
- Three-phase current, Zero-sequence current
- Two change-over alarm contacts including IF
- Complete digital design, simple principle;
- Strong electrical performance;
- Comprehensive record of fault information;
- Double criterion of over-current and arc, high reliability;
- Optical fiber transmits, strong electromagnetic interference resistance;
- Programmable logic of trip exit;
- Fast exit tripping, short total fault clearing time.
Applications
- Reduce the harm of arc light to human body;
- Reduce damage to equipment caused by arc short-circuit faults;
- Avoid transformer damage caused by bus failure;
- Protect the dc system in the station;
- Ensure the stable operation of power substations;
- Thermal power plant electrical section switchgear;
- Wind farm and photovoltaic station switchgear;
- Large municipal engineering project;
Specification
| Basic parameters | |
| Rated working voltage | DC24V |
| AC current | 5A or 1A (specify when ordering) |
| Frequency | 50HZ |
| Working power consumption | Working normally, ≤ 3W
Protection operates, ≤ 6W |
| AC current loop consumption | < 1VA/phase (IN =5A);
< 0.5VA/phase (IN =1A); |
| Current working range | 0.08In~10In |
| Time working range | 0~99s |
| Setting accuracy | ≤±5%; |
| Time accuracy | <±1%*setting time+20ms |
| The whole group action time | Single criterion ≤ 7ms
Double criterion ≤ 20ms |
| Arc signal input | |
| Input type | Passive optical signal |
| Input quantity | 3 |
| Interface type: | Optical fiber |
| Output contact capacity | |
| A) Export relay: (3 routes) | |
| Contact rated current carrying capacity | 250Vac/220Vdc, 5A |
| Output type | Passive (NO/NC) |
| B) Signal relay: (1 way) | |
| Contact rated current carrying capacity | 250Vac/220Vdc, 5A |
| Output type | Passive (NO/NC) |
| Address | 1~99 |
| Communication interface | |
| Electrical characteristics | RS485 |
| Transmission method | Asynchronous |
| Communication protocol | Modbus RTU |
| Communication medium | Shielded twisted pair |
| Environment | |
| Working temperature | -30 ~ 70°C |
| Storage temperature | -40 ~ +85°C |
| Humidity | 5~95%RH |
| Electromagnetic compatibility | |
| Electrostatic discharge test | IEC 60255-22-2:2008. level-4 |
| Fast transient dry resistance test | IEC 60255-22-4:2008. level-A |
| 1mhz burst interference test | IEC 60255-22-1-2007. level-3 |
| Electrical disturbance test | IEC 60255-22-2:2008.level-3 |
| Surge immunity test | IEC 60255-22-5:2008 |
