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SEL-451 | Schweitzer Engineering Multifunction Protection And Control Relay With Advanced Communications
- Regular price
- $1,699.00
- Sale price
- $1,699.00
- Regular price
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Product Description P/N: SEL-451
Description
The Schweitzer Engineering SEL-451 is a multifunction protection and control relay designed to combine bay control, breaker protection, and system monitoring in a single device. This part number offers high-speed fault detection, precise measurement inputs, and extensive communication protocol support for integration into modern substations.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Schweitzer Engineering |
| Category | Transmission Distribut. Relays |
| Part Number | SEL-451 |
| Subcategory | Phase/Voltage Loss Relay |
| AC Current Inputs | 5 A nominal / 1 A nominal |
| AC Voltage Inputs | 0–300 V L-N operational |
| LEA Voltage Inputs | 0–8 V L-N operational |
| Sampling Rate | 8,000 samples per second |
| Protection Processing Rate | 8× per power system cycle |
| Communications Ports | One front and three rear EIA-232 serial ports |
| Serial Port Speeds | 300–57,600 bps |
| Ethernet Options | 2-, 4-, or 5-port cards (copper or fiber) |
| TiDL Ports | 8 fiber-optic ports, 100 Mbps, ~2 km range |
| SV Ports | Up to 7 data streams, IEC 61850-9-2 |
| Supported Protocols | FTP, HTTP, Telnet, DNP3, SEL ASCII, synchrophasors, PRP, PTPv2, IEC 61850 Ed. 2 (optional) |
| Power Supply Options | 24–48 Vdc; 48–125 Vdc / 110–120 Vac; 125–250 Vdc / 110–240 Vac |
| Operating Temperature | –40° to +85°C (–40° to +185°F) |
| Time Synchronization | IRIG-B (demodulated) and PTPv2 |
| TiDL Protocol | SEL T-Protocol |
Information About SEL-451
The SEL-451 is part of Schweitzer Engineering Laboratories’ family of digital protection relays built for substation automation, high-speed control, and comprehensive system monitoring. Its architecture includes six voltage and six current inputs, advanced processing at 8,000 samples per second, and configurable logic for complex protection schemes. The device integrates easily into SCADA, automation, and Ethernet-based systems via multiple serial interfaces and selectable Ethernet cards supporting copper or fiber networks. Typical deployment includes feeder protection, bay control schemes, breaker wear monitoring, pad-mounted switchgear applications, and installations requiring precise synchronization through IRIG-B or PTPv2 time sources.
Key Features:
- Multifunction Relay Platform: Combines protection, bay control, automation, and monitoring in a single unit.
- High-Speed Protection Processing: Voltage and current inputs sampled at 8,000 samples per second for dynamic response.
- Flexible Communications: Supports DNP3, IEC 61850 Edition 2 (optional), synchrophasors, FTP, HTTP, Telnet, and SEL protocols.
- Multiple Ethernet Options: Selectable two-, four-, or five-port cards with copper or fiber network interfaces.
- Breaker Wear Tracking: Evaluates interruption times, accumulated duty, and operation counts for maintenance planning.
- LEA Voltage Input Capability: Enables direct connection to low-energy sensors for simplified switchgear protection.
- Precise Time Synchronization: Supports IRIG-B and PTPv2, including IEEE C37.238 and IEC 61850-9-3 profiles.
- Extreme Temperature Operation: Rated from –40°C to +85°C for demanding substations and field environments.
The SEL-451 delivers the reliability and precision required for advanced substation protection and bay control systems.
Description
The Schweitzer Engineering SEL-451 is a multifunction protection and control relay designed to combine bay control, breaker protection, and system monitoring in a single device. This part number offers high-speed fault detection, precise measurement inputs, and extensive communication protocol support for integration into modern substations.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Schweitzer Engineering |
| Category | Transmission Distribut. Relays |
| Part Number | SEL-451 |
| Subcategory | Phase/Voltage Loss Relay |
| AC Current Inputs | 5 A nominal / 1 A nominal |
| AC Voltage Inputs | 0–300 V L-N operational |
| LEA Voltage Inputs | 0–8 V L-N operational |
| Sampling Rate | 8,000 samples per second |
| Protection Processing Rate | 8× per power system cycle |
| Communications Ports | One front and three rear EIA-232 serial ports |
| Serial Port Speeds | 300–57,600 bps |
| Ethernet Options | 2-, 4-, or 5-port cards (copper or fiber) |
| TiDL Ports | 8 fiber-optic ports, 100 Mbps, ~2 km range |
| SV Ports | Up to 7 data streams, IEC 61850-9-2 |
| Supported Protocols | FTP, HTTP, Telnet, DNP3, SEL ASCII, synchrophasors, PRP, PTPv2, IEC 61850 Ed. 2 (optional) |
| Power Supply Options | 24–48 Vdc; 48–125 Vdc / 110–120 Vac; 125–250 Vdc / 110–240 Vac |
| Operating Temperature | –40° to +85°C (–40° to +185°F) |
| Time Synchronization | IRIG-B (demodulated) and PTPv2 |
| TiDL Protocol | SEL T-Protocol |
Information About SEL-451
The SEL-451 is part of Schweitzer Engineering Laboratories’ family of digital protection relays built for substation automation, high-speed control, and comprehensive system monitoring. Its architecture includes six voltage and six current inputs, advanced processing at 8,000 samples per second, and configurable logic for complex protection schemes. The device integrates easily into SCADA, automation, and Ethernet-based systems via multiple serial interfaces and selectable Ethernet cards supporting copper or fiber networks. Typical deployment includes feeder protection, bay control schemes, breaker wear monitoring, pad-mounted switchgear applications, and installations requiring precise synchronization through IRIG-B or PTPv2 time sources.
Key Features:
- Multifunction Relay Platform: Combines protection, bay control, automation, and monitoring in a single unit.
- High-Speed Protection Processing: Voltage and current inputs sampled at 8,000 samples per second for dynamic response.
- Flexible Communications: Supports DNP3, IEC 61850 Edition 2 (optional), synchrophasors, FTP, HTTP, Telnet, and SEL protocols.
- Multiple Ethernet Options: Selectable two-, four-, or five-port cards with copper or fiber network interfaces.
- Breaker Wear Tracking: Evaluates interruption times, accumulated duty, and operation counts for maintenance planning.
- LEA Voltage Input Capability: Enables direct connection to low-energy sensors for simplified switchgear protection.
- Precise Time Synchronization: Supports IRIG-B and PTPv2, including IEEE C37.238 and IEC 61850-9-3 profiles.
- Extreme Temperature Operation: Rated from –40°C to +85°C for demanding substations and field environments.
The SEL-451 delivers the reliability and precision required for advanced substation protection and bay control systems.