SEL-2401

Satellite-Synchronized Clock

The SEL-2401 is a compact satellite-synchronized clock designed to provide precise time synchronization in space-constrained and harsh environments, such as distribution control cabinets. By receiving GPS time, it supplies accurate time to recloser controls and other devices, enhancing event analysis and operational reliability. Its small size and low power consumption make it optimal for installation in outdoor control enclosures.

Key Features

Ultra-Precise Time Synchronization

Provides an average timing accuracy of $\pm100$ ns based on GPS, supporting high-precision data analysis for protective relays and phasor measurement units (PMUs).
Demodulated IRIG-B Output

Outputs demodulated IRIG-B time code via a BNC connector for synchronization with various intelligent electronic devices (IEDs).
Rugged Environmental Durability

Operates in extreme temperatures from -40°C ~ +80°C and exceeds IEEE C37.90 and IEC 60255 protective relay standards.
Low Power Design

Consumes less than 2W and supports 9–30 Vdc or rated 5 Vdc power inputs.
Contact Output

Provides an alarm and control contact (Form A) that can serve as a precision trigger for time-coordinated testing or event initiation.

Compact Form Factor

Designed with a very small footprint for easy installation inside distribution panels or control cabinets where space is limited.
Simple Configuration Management

Allows physical setting changes via configuration switches (DIP switches) on the bottom of the device without complex software procedures.
Automatic Time Adjustment

Automatically adjusts for daylight-saving time (DST) without manual intervention, minimizing maintenance efforts.
Various Interfaces

Equipped with a TNC connector for antenna connection and an EIA-232 serial port (DB-9) for device configuration and status monitoring.
Extensibility

When used with the SEL-9929 display kit, it can provide precise time to a large LED clock (SEL-3401) visible from up to 200 feet, improving on-site visibility.

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