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1 Introduction
1.1
Product Description
Kronos Series 3 Satellite Clocks are specifically developed for applications in protection, automation, and
control of power systems.
These clocks provide GNSS-derived synchronization signals in different formats and protocols for use by,
among others, protection relays, phasor-measurement units, revenue meters, fault recorders, and fault
locators.
Signals can be distributed over a dedicated wiring (coax, twisted pair, fiber optic), PTP, and NTP.
The standard oscillator is TCXO. OCXO is available as an option for better holdover in case of loss of
satellites.
A bright dot matrix display on the front of the Kronos clock provides feedback to substation personnel and
allows for easy checking of correct configuration of time zone and daylight saving time.
The Kronos clock can be monitored and configured remotely using a web browser.
1.2
Key Features
The Kronos clocks offer the following key features:
▪ Accuracy 20ns (99%, clear sky)
▪ TCXO (standard) or OCXO (optional)
▪ RJ45 port for configuration and monitoring (port A)
▪ Four SFP slots, of which two slots PRP/HSR
▪ Timing signal generators for IRIG-B, PPS, and PPM signals
▪ Up to two output cards (unmodulated, modulated, optical fiber)
▪ PTP and NTP
▪ Supported PTP profiles
o Default - UDPv4
o Default - 802.3
o IEEE C37.238-2011 (Power Profile)
o IEEE C37.238-2017 (Power Profile)
o IEC 61850-9-3:2016 (Utility Profile)
o Custom
▪ Built-in SNMP agent, with trap generation
▪ Syslog
▪ Form C alarm dry contact
▪ Antenna cable delay compensation
▪ User-configurable rules for daylight saving time (DST)
▪ Leap second announcement
▪ Redundant power supply option
▪ 19" rack mount
1.3
Firmware Versions
The firmware revision is displayed on the unit's dot matrix display for a few seconds immediately after power
up.
9
Kronos Series 3
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