SEL-2488 Satellite-Synchronized Network Clock

The SEL-2488 receives Global Navigation Satellite System (GNSS) time signals and distributes precise time via multiple output protocols, including IRIG-B and the Network Time Protocol (NTP). With an optional upgrade, the SEL-2488 can serve as a Precision Time Protocol (PTP) grandmaster clock, as defined by IEEE 1588. The advanced capabilities of the SEL-2488 make it well-suited for demanding applications, like synchrophasors, and for substations with multiple time synchronization requirements.

Front- and Rear-Panel Diagrams

Front		Rear

Advanced Technology for Demanding/Critical Time Synchronization

The SEL-2488 Satellite-Synchronized Network Clock receives Global Navigation Satellite System (GNSS) time signals and distributes precise time via multiple output protocols, including IRIG-B, PTP grandmaster as defined by IEEE 1588, and NTP. The SEL-2488 raises the bar for satellite-synchronized clocks by providing higher levels of accuracy, flexibility, dependability, and ease of use. The advanced capabilities of the SEL-2488 make it well-suited for demanding applications, like synchrophasors, sampled values, traveling wave fault location, and substations with multiple time synchronization requirements.

Accurate

Synchronize with precise time accuracy to within ±40 ns for power utility applications. If GNSS time signals become unavailable, the clock switches to the internal TCXO holdover, with 36 μs/day accuracy, or to the optional OCXO holdover, with 5 μs/day accuracy. Both of these holdover accuracy specifications are based on a constant operating temperature.

Flexible

Distribute time from eight time outputs that are configurable for IRIG-B or time pulse outputs. The SEL-2488 also includes four independent Ethernet ports, which distribute time via NTPv4. With purchase of the PTP (IEEE 1588 v2) option, the SEL-2488 can act as a PTP grandmaster clock with default and power system profiles (IEEE C37.238-2011) and can distribute time to four independent networks.

Dependable

The SEL-2488 provides an option for a second, redundant, hot-swappable power supply; operates from –40° to +85°C (–40° to +185°F); is certified to IEEE 1613 Class 1, IEC 61850-3, and IEC 60255; and is backed by our ten-year worldwide product warranty.

Secure and Simple

The SEL-2488 supports DHCP with a captive portal, LDAP, an HTTPS web interface, and acSELerat QuickSet®SEL-5030 Software for easy and secure configuration.