Precise Time
Satellite Clocks
SEL satellite clocks provide microsecond-accurate synchronization for critical infrastructure like electric utilities, data centers, and public safety. They meet the stringent requirements of applications like Land Mobile Radio (LMR) systems, synchrophasors, and Digital Secondary Systems (DSS).
Satellite Clocks
These products process signals from satellites and send time data to devices in critical applications using IRIG-B, the Precision Time Protocol (PTP), the Network Time Protocol (NTP), and 10 MHz frequency for high-precision synchronization and event reporting.
Antennas
These products receive signals from Global Navigation Satellite Systems for output to satellite-synchronized clocks.
Clock Accessories
These auxiliary products support the display and precise transmission of satellite-synchronized time.
Precise Time Features
Standard Feature
Model Option/Accessory
Precise Timing | ||||||
|---|---|---|---|---|---|---|
Applications | ||||||
Time Source for Substation | ||||||
Time Source for Industrial Applications | ||||||
Time Source for Land Mobile Radio (LMR) systems and Public Safety Answering Points (PSAPs) | ||||||
Digital Secondary Systems (Sampled Values) | ||||||
Time Source for PMU (Synchrophasors IEEE C37.118.1-2011) | ||||||
Time Source for Recloser | ||||||
Time Source for Line Current Differential Protection | ||||||
Time Source for Traveling-Wave Fault Location | ||||||
Time-Synchronized Event Reporting | ||||||
Network Time Synchronization Applications Using the Network Time Protocol (NTP) | ||||||
Time Sources and Time Distribution | ||||||
Demodulated IRIG-B Outputs (Quantity) | 1 | 6 | 12 | 4+ | 4 | 9 |
Modulated IRIG-B Outputs (Quantity) | 1 | Up to 4 | ||||
10 MHz Frequency Outputs (Quantity) | 6+ | |||||
GPS Satellite Tracking | ||||||
GLONASS Satellite Tracking (Verification Only) | ||||||
Satellite Signal Verification | ||||||
Demodulated IRIG-B Input | ||||||
Synchronized Pulse Output | ||||||
Network Time Protocol (NTP) Server | ||||||
IEEE 1588-2008 Precision Time Protocol (PTP) Input (With ITU-T G.8275.1 Telecom Profile) | ||||||
IEEE 1588-2008 PTP (With IEEE C37.238-2011/2017 Power System and IEC/IEEE 61850-9-3:2016 Power Utility Automation Profiles) | ||||||
Features | ||||||
Large, 76.2 mm (3.0 in) Tall LED Display for Long-Distance Viewing (61 m [200 ft]) | ||||||
14 mm (0.56 in) Tall Display | ||||||
Rack-Mount Hardware | ||||||
Panel-Mount or Wall-Mount Hardware | ||||||
Universal Power Supply | ||||||
Dual, Redundant, Hot-Swappable Power Supplies (High Voltage or Low Voltage) | ||||||
Power Over Ethernet (PoE) Power Sourcing Equipment (PSE) | ||||||
Parallel Redundancy Protocol (PRP) and Ethernet Failover Support | ||||||
Secure Web Interface for Configuration | ||||||
Serial Ports for Configuration | ||||||
User-Based Accounts | ||||||
TCXO Holdover | ||||||
OCXO or DOCXO, High Stability Holdover | ||||||
Cable Delay Compensation | 1 | |||||
IEEE C37.90 and IEC 60255 Surge and Environmental Standards Compliance | ||||||
Accuracy | ||||||
Average Accuracy (ns) | ±100 | ±100 | ±40 | |||
Peak Accuracy (ns) | ±500 | ±500 | ±1,000 | ±100 | ||
1 SEL-2488 includes antenna cable delay compensation.