Aug 5 2010
Schweitzer Engineering Laboratories (SEL) has launched a new fiber-optic adapter, the SEL-9220, for the SEL-300 Series Relays. The fiber-optic adapter can be mounted on the EIA-485 port present in the relay connector.
The adapter changes the EIA-485 port to a fiber-optic link. This optic link is compatible with fiber-optic interfaces, IRIG-B and SEL-2812 transceivers on various SEL devices. The SEL-2812 and the SEL-9220 utilize a single pair of optical fibers for serial data communication and transmits an IRIG-B time signal to synchronize the device clocks.
SEL 9220 fiber optic adapter
The SEL-300 Series Relays have a single EIA-485 port and two EIA-232 ports on the back to facilitate permanent connections. The SEL-2812 transceivers transform the EIA-232 ports into fiber-optic links, while the SEL-9220 fiber-optic adapter offers the third link.
The SEL-300 Series Relays are used in electrical Substations, which utilize one port for remote engineering access, another for communicating with a SCADA, and the third for relay-to-relay communications for remote teleprotection schemes, rapid restoration, distribution automation, main-tie-main-schemes and distributed bus protection.
Senior Engineer of SEL, Gary Scheer, stated that the SEL-300G Generator Relay protects and monitors every single generator in a generating plant. The SEL-9220 fiber-optic adapter offers the third optical link so that the SEL-300G Generator Relay can check the temperatures with a SEL-2600 RTD module.