Features of SEL Arc Flash Relay
- Rapid Detection and Response: Detects arc-flash hazards within 2 milliseconds and initiates a trip signal to the circuit breaker.
- Minimized Equipment Damage: Reduces equipment damage during arc-flash events, improving system availability.
- Coordinated Protection: Integrates with upstream protection systems using SEL Mirrored Bits or IEC 61850 GOOSE messaging to ensure coordinated fault clearing.
- Versatile Installation: Suitable for both new and existing installations, including retrofitting SEL-751 relays.
- Robust Communication: Supports multiple communication protocols, including Ethernet-based protocols like Modbus TCP, DNP3, and IEC 61850.
- Reliable and Durable: Designed to operate in harsh environments with a wide temperature range and backed by a 10-year warranty.
- Arc-Flash Mitigation: detect arc flash by the combined light and high-speed overcurrent detection
Specification of SEL Arc Flash Relay
| 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 |
