SEL-2407

Satellite-Synchronized Clock

The SEL-2407 is a satellite-synchronized clock that provides accurate time synchronization and time display even in harsh substation environments. It synchronizes protective relays, phasor measurement units (PMUs), automation controllers, and other intelligent electronic devices (IEDs) with an average timing accuracy of $\pm100$ ns, enhancing event analysis and operational reliability of power systems.

Key Features

High Reliability and Standards Compliance

Features a rugged design that exceeds IEEE C37.90 and IEC 60255 protective relay standards, ensuring stable performance in harsh environments.
Wide Operating Environment

Operates in a broad temperature range from -40°C ~ +80°C and features a universal power supply (10–300 Vdc or 85–264 Vac) for high installation flexibility.
Multiple Time Output Ports

Supports simultaneous synchronization of multiple devices through one modulated IRIG-B output and six demodulated IRIG-B outputs.
Programmable Outputs

Three of the six demodulated outputs can be user-configured as IRIG-B, 1 PPS (pulse per second), or 1 kPPS (pulse per millisecond).
Precise Timekeeping

Supports correlation analysis of relay event records and accurate timestamp generation through high-precision timing technology.

Intuitive Time Display

Features a large, bright LED time display on the front of the device for immediate on-site time verification.
Status LED Indicators

LEDs for Enabled, Satellite Lock, and Holdover allow for at-a-glance monitoring of the system's operational status.
Easy Connectivity

Equipped with a standard TNC antenna connector and an EIA-232 serial port (DB-9), with an option for ST fiber-optic ports to enhance long-distance signal transmission and noise immunity.
Alarm and Timer Contacts

Offers flexibility with a Form C alarm contact for system failure notification or a Form A pulse output for precise time intervals.
Diagnostic Function

Includes a front-panel Lamp Test button to easily check the status of all LEDs.

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