Teleprotection
Protective relays communicate with each other to clear faults faster, increase fault sensitivity, and restore power quicker. Select SEL products and technology to implement reliable teleprotection.
- SEL ICON™—Integrated Communications Optical Network
SEL is changing the face of utility communications with the SEL ICON. The ICON combines SONET multiplexer and Ethernet switch capabilities in a single scalable platform, and it provides IEEE C37.94 interface support via optional dedicated access modules. Other data formats are also supported, including EIA-232, EIA-422, EIA-485, EIA-530, and EIA-449.
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- SEL-2595 Teleprotection Terminal
SEL-2595 Teleprotection Terminal provides secure, high-speed contact transfer through communications multiplexers, using an IEEE C37.94 standard fiber-optic interface.
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- SEL-2594 Contact Transfer Module
The SEL-2594 Contact Transfer Module provides secure, high-speed contact transfer through communications multiplexers, using an
IEEE C37.94 standard fiber-optic interface.
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- SEL-2100 Logic Processor
Low cost, high speed bus protection, automated bus sectionalizing, breaker failure protection, and multiple terminal line protection. Interconnect up to 15 devices using Mirrored Bits® communications.
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- SEL-2506 Rack-Mount Remote I/O Module
Rack-Mount Remote I/O Module with 8 digital inputs and 8 digital outputs using SEL Mirrored Bits® communications.
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- SEL-2505 Remote I/O Module
Apply SEL-2505 Remote I/O Modules to use two optical fibers instead of 32 wires to reduce costs, improve safety, and boost reliability.
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- SEL-3094 Interface Converter
Convert electrical teleprotection interfaces to the IEEE C37.94 optical standard. Connect an SEL-3094 to an ITU-T G.703, EIA-422, EIA-485, or EIA-232 device, and use up to 2 km of optical fiber to link to an IEEE C37.94 multiplexer. Similarly, connect an SEL-3094 to a noncompliant multiplexer, and use fiber to connect to a new teleprotection device and another SEL-3094 at the multiplexer to replace a G.703, EIA-422, EIA-485, or EIA-232 wire link with optical fiber.
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- SEL-2894 Interface Converter
Convert asynchronous EIA-232 serial communications interfaces to the IEEE C37.94 optical standard.
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- IEEE C37.94 Optical Interface Standard
The safest and most reliable protection communications schemes in the industry use IEEE C37.94 fiber-optic links between protective relays and telecommunications multiplexers. Optical fibers do not have ground paths and are immune to electrical interference.
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- Mirrored Bits Communications
SEL developed Mirrored Bits communications to provide high-speed, secure, point-to-point communication of real or virtual contact-status bits. Protection applications include directional element-based bus protection and replacement of tone-channel equipment for communications-assisted blocking, unblocking, permissive, and transfer trip schemes. Automation applications include high-speed sectionalizing, restoration, and interlock schemes as well as replacement of large bundles of field wiring with several small optical fibers, lowering costs and improving reliability.
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