Precise Time Features

Standard Feature Model Option/Accessory
Precise TimingSEL-2401SEL-2407SEL-3400SEL-3401SEL ICONSEL-2488
Applications
Time Source for Substation and Industrial Applications
Time Source for Land Mobile Radio (LMR) systems and Public Safety Answering Points (PSAPs)
Digital Secondary Systems (Sampled Values)
Time Source for Phasor Measurement Unit (IEEE C37.118.1-2011 Synchrophasors)
Time Source for Recloser
Time Source for Line Current Differential Protection, Traveling-Wave Fault Locating, and Time-Synchronized Event Reporting
Network Time Synchronization Applications Using the Network Time Protocol (NTP)
Time Sources and Time Distribution
Demodulated IRIG-B Outputs (Quantity)16124+49
Modulated IRIG-B Outputs (Quantity)1Up to 4
Optional 10 MHz Frequency Outputs (Quantity)6
GPS Satellite Tracking
GLONASS Satellite Tracking (Verification Only)
Demodulated IRIG-B Input
Synchronized Pulse Output
NTP Server
IEEE 1588-2008 Precision Time Protocol (PTP) Input (With ITU-T G.8275.1 Telecom Profile)
IEEE 1588-2008 PTP Output (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)
Parallel Redundancy Protocol (PRP) and Ethernet Failover Support
Secure Web Interface for Configuration
Serial Ports for Configuration
User-Based Accounts
TCXO Holdover
OCXO, DOCXO, or Rubidium High-Stability Holdover
Cable Delay Compensation1
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.