GE Reason RT430 Technical Manual

A clock referenced to gps and glonass satellites
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© ALSTOM 2014. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is
complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject
to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.
Reason RT430

Technical Manual

GPS Grandmaster Clock
Platform Hardware Version: A
Platform Software Version: 05
Publication Reference: RT430-TM-EN-5


Table of Contents

Summary of Contents for GE Reason RT430

  • Page 1: Technical Manual

    Reason RT430 Technical Manual GPS Grandmaster Clock Platform Hardware Version: A Platform Software Version: 05 Publication Reference: RT430-TM-EN-5 © ALSTOM 2014. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project.
  • Page 2: Table Of Contents

    GPS Grandmaster Clock Contents TECHNICAL MANUAL PREFACE ACRONYMS AND ABBREVIATIONS SAFETY SECTION Chapter Overview Health and Safety Symbols Installation, Commissioning and Servicing 4.1 Lifting Hazards 4.2 Electrical Hazards 4.3 Fusing Requirements 4.4 Equipment Connections 4.5 Pre-energisation Checklist 4.6 Peripheral Circuitry 4.7 Upgrading/Servicing Decommissioning and Disposal Standards Compliance...
  • Page 7: Preface

    RT430 PREFACE © 2014 Alstom Tecnologia S.A. All rights reserved. Products developed by Alstom are continuously improved. The information this document contains reflects this improvement, and for this Alstom it is subject to change without notice. Please make sure that this is latest version of this document before proceeding.
  • Page 8: Acronyms And Abbreviations

    GPS Grandmaster Clock ACRONYMS AND ABBREVIATIONS AC - Alternating Current; ACEB NEMEA - Acronyms and Abbreviations; ASCII - American Standard Code for Information Interchange; BMC - Best Master Clock; BNC - Bayonet Neil Concelman connector; Bps – Bytes per second; bps - Bits per second;...
  • Page 9 RT430 IP - Internet Protocol; IP40 - Degree of protection 40; IRIG-B - Time synchronism protocol Inter Range Instrumentation Group (Rate Designation B); LCD - Liquid Crystal Display; MAC - Media Access Control; NTP - Network Time Protocol; OUT - Abbreviation of the term Output; P2P - Peer-to-peer;...
  • Page 10: Safety Section

    GPS Grandmaster Clock SAFETY SECTION 1 Chapter Overview This chapter provides information about the safe handling of the equipment. The equipment must be properly installed and handled in order to maintain it in a safe condition and to keep personnel safe at all times. You must be familiar with information contained in this chapter before unpacking, installing, commissioning, or servicing the equipment.
  • Page 11: Installation, Commissioning And Servicing

    RT430 Risk of electric shock Ground terminal. Note: This symbol may also be used for a protective conductor (ground) terminal if that terminal is part of a terminal block or sub-assembly. Protective conductor (ground) terminal Both direct and alternating current Instructions on disposal requirements The term 'Ground' used in this manual is the direct equivalent of the European term 'Earth'.
  • Page 12 GPS Grandmaster Clock Always use the equipment as specified. Failure to do so will jeopardise the protection provided by the equipment. Removal of equipment panels or covers may expose hazardous live parts. Do not touch until the electrical power is removed. Take care when there is unlocked access to the rear of the equipment.
  • Page 13: Fusing Requirements

    RT430 The equipment shall have all their rear connectors attached even if they are not being used, in order to keep their levels of ingress protection as high as possible Never manipulate liquid containers near the equipment even when it is powered off. Avoid modification to the wiring of panel when the system is running.
  • Page 14: Pre-Energisation Checklist

    GPS Grandmaster Clock Watchdog (self-monitoring) contacts are provided to indicate the health of the device on some products. We strongly recommend that the user hard wire these contacts into the substation's automation system, for alarm purposes. Earth the equipment with the supplied PCT (Protective Conductor Terminal). Do not remove the PCT.
  • Page 15: Upgrading/Servicing

    RT430 Where external components such as resistors or voltage dependent resistors (VDRs) are used, these may present a risk of electric shock or burns if touched. Operation of computers and equipment connected to RT430 under environmental conditions such as temperature and humidity that exceed the conditions specified in their respective manuals can cause malfunctioning or even irreversible damage to them or the nearby installation.
  • Page 16: Emc Compliance

    GPS Grandmaster Clock 6.1 EMC Compliance Compliance with IEC 60255-26:2013 was used to establish conformity. 6.2 Product Safety Compliance with IEC 61010-1:2010 was used to establish conformity. 6.3 Installation Category Compliance with IEC 61010-1:2010 Overvoltage Category II. 6.4 Protective Class Protective Class I.
  • Page 17: Description

    RT430 1. DESCRIPTION Introduction RT430 - GPS Grandmaster Clock is a clock referenced to GPS satellites, whose main application is to be a source of temporal synchronization signals in different formats and protocols to synchronize internal clocks of equipment and systems based on digital processing. It has high accuracy (100 ns) and signal stability, even in situations where there is loss of GPS satellites.
  • Page 18: Foreword

    GPS Grandmaster Clock Appendix D presents the considerations used by RT430 to compensate delays inserted by the cable length of the GPS antenna. Appendix E gives some architectures implementing the RT430 as a source of timing for different electronic devices. Foreword This technical manual provides a functional and technical description of Alstom Grid's RT430, as well as a comprehensive set of instructions for using the device.
  • Page 19: Available Models

    RT430  2 open collector outputs for voltages up to 400 V, normal or reversed polarity, and singly programmable output signal;  1 output in modulation amplitude for IRIG-B124 signal;  2 optical outputs with ST connector and multimode fiber; ...
  • Page 20: Front And Rear Views

    GPS Grandmaster Clock It is also possible to obtain equipment with one or two power supply sources option, the second used for redundancy. Each power supply source can have the configuration shown in the table below: TABLE 2: Possible configuration of the power supply source. POWER SUPPLY 1 POWER SUPPLY 2 Not applicable...
  • Page 21: Technical Specifications

    RT430 Figure 2: Rear view of the RT430 The rear panel of the RT430 comprises two feeding inputs, AC or DC; two BNC connector electrical outputs for synchronization, one of them insulated; two TTL level screw connector electrical outputs for synchronization, one of them insulated;...
  • Page 22: Gps Antenna

    GPS Grandmaster Clock Antenna type Active Antenna’s supply 3,3 V, max 100 mA 50 Ω Impedance antenna 25m (Standard) Cable 40m, 75m e 100m (optionals) Connector BNC (female) 1.6.3 GPS Antenna TABLE 5: GPS Antenna specifications 3.3V TNC Female active GPS antenna (100mA Type max) Frequency...
  • Page 23: Internal Oscillator

    RT430 TABLE 6: Antenna Cable specifications Length Delay (ns) Description TNC Male to BNC Male RGC-58 antenna 15 m (50 ft) cable TNC Male to BNC Male RGC-58 antenna 102,6 25 m (82 ft) cable TNC Male to BNC Male RGC-58 antenna 163,60 40 m (131 ft) cable...
  • Page 24: Open Collector Electrical Outputs

    GPS Grandmaster Clock 1.6.7 Open Collector Electrical Outputs TABLE 9: Open callector outputs specifications. Maximum collector emetter voltage 400 V Maximum current 200 mA 1.6.8 Optical Outputs TABLE 10: Optical outputs specifications. Connector Weve-length 820 nm Multimodo 50 / 125 µm, 100 / 140 µm ou 200 µm HCS Fiber Type - 17.8 dBm (50 / 125 µm) - 14.0 dBm (62.5 / 125 µm)
  • Page 25: Serial Port (Rs232, Rs422/485)

    RT430 15 Ω Outputs Impedance Maximum Current 80 mA It is recommended that the length of cables not to exceed 100m. 1.6.10 Serial Port (RS232, RS422/485) TABLE 12: RS232 or RS422/485 serial port specifications. Signal Level RS232 ou RS422/485 Bitrate 1200, 2400, 4800, 9600, 19200 ou 38400 bps Databits 7 ou 8...
  • Page 26: Precision Time Protocol Ptp (Ieee 1588)

    GPS Grandmaster Clock 1.6.13 Precision Time Protocol PTP (IEEE 1588) TABLE 15: PTP time synchhronization protocol specifications. UDP/IPv4 (Leyer 3) (Multicast/Unicast) Protocols IEEE 802.3 (Leyer 2) (Multicast) End-to-End (Multicast/Unicast) Delay Compensation Peer-to-Peer (Multicast) Profiles Standard, Power System 1.6.14 Ethernet Ports TABLE 16: Ethernet ports specification.
  • Page 27 RT430 5 … 95 %, noncondensing Relative humidity -40°C As tested per 60068-2-1 +85°C As tested per 60068-2-2 TABLE 18: Enclosure Protection IEC 60529 Front flush mounted with panel IP54 Rear and sides IP20 Product safety protection IP20 (for the rear due to live Connections on the terminal block) RT430-TM-EN-5...
  • Page 28: Dimensions, Weight

    GPS Grandmaster Clock 1.6.16 Dimensions, Weight TABLE 19: Dimensions and weight specification. Height Width (bory) 430 mm (16.9 in) Depth 180 mm (7.1 in) Weight 2.7 kg (5.9 lbs) RT430 dimensions are shown on Figure 3 Figure 3: RT430 Dimensions RT430-TM-EN-5...
  • Page 29: Installation

    RT430 2. INSTALLATION Unpacking Unpack the unit carefully and make sure all the accessories and cables are put aside so they will not be lost. Check the contents against the packing list that goes with the product. If any of the content listed are missing, please contact Alstom (see contact information at the beginning of this manual).
  • Page 30: Environment

    GPS Grandmaster Clock Environment Temperature and relative humidity should not exceed the limits stated in Chapter 1. We recommend you to provide appropriate heating or cooling measures to ensure that these limits are respected at all times. Mounting RT430 has been designed to be mounted in a standard 19-inch rack using four M6x15 screws to affix. Allow adequate clearance for all connections.
  • Page 31: Power Supply

    RT430 2 optical outputs for synchronism RS232 and RS422/485 serial port Communication ports via Ethernet network GPS antenna input Power Supply The unit can be powered from DC or AC power within the limits specified in Chapter 1. There are two power supplies allowing redundancy to ensure operation even if one of the power supplies is interrupted.
  • Page 32: Ac Power Connection

    GPS Grandmaster Clock 2.7.1 AC Power Connection Phase conductor should be applied to terminal 1, neutral conductor to terminal 2 in each of the supply terminals identified as Power 1 and Power 2 as shown in Figure 8 Figure 8: AC power connection For compliance with IEC 61010, install a suitable external switch or circuit breaker in each current-carrying conductor of RT430 power supply;...
  • Page 33: Earthing (Grounding)

    RT430 For compliance with IEC 61010, install a suitable external switch or circuit breaker in each current-carrying conductor of RT430 power supply; this device should interrupt both the hot (+/L) and neutral (-/N) power leads. An external 10 A, category C, bipolar circuit-breaker is recommended. The circuit breaker should have an interruption capacity of at least 25 kA and comply with IEC 60947-2.
  • Page 34: Gps Antenna Terminal

    GPS Grandmaster Clock GPS Antenna Terminal A 3.3-Volt active GPS antena (100mA max) must be connected to the antenna terminal if GPS satellites are used as time reference. See Chapter 1 for additional information. Figure 11: GPS antenna connector If the GPS antenna is already connected and it is possible to receive signal from at least 4 GPS satellites the indicator will start to blink after a couple of seconds, indicating that the internal time-base is being OCKED synchronized with the satellites.
  • Page 35 RT430 An antenna mast of roof-mounting-kit and any supporting structure must be properly grounded to provide protection against voltage surges and built-up static charges. We recommend the use of surge protector for the entire wiring where there is external antenna cable. The antenna has to be connected to the unit by using a coaxial cable with a 50Ω...
  • Page 36: Ttl Electrical Outputs

    GPS Grandmaster Clock 2.10 TTL Electrical Outputs RT430 has 4 electrical output, 2 screw connector, and 2 BNC connector. One output of each connector type is insulated, as Figure 14 shows. Figure 14: TTL level electrical outputs Chapter 1 for more description of signal levels and maximum charge. The type of signal at each output can be configured through a Web Interface to generate IRIG-B004, DCF77, 1PPS, 1PPM, 100PPS, or any custom-defined low frequency, from 1 pulse-every-two-seconds to 1 pulse- per-day.
  • Page 37: Optical Outputs

    RT430 The open-collector outputs require the use of an external resistor properly sized to limit current to a value below 300 mA, as shown in Figure 16 Figure 16: Connection diagram of the open-collector electrical outputs To scale the resistor use the relationship: Where V is the external voltage to be switched by the open-collector output.
  • Page 38: Amplitude Modulated Outputs

    GPS Grandmaster Clock Figure 17: Optical outputs The length of fiber-optic cables shall not exceed 2km. See Chapter 1 for optical outputs technical information. The type of signal at each output can be configured through a Web Interface to generate IRIG- B004, DCF77, 1PPS, 1PPM, 100PPS, or any custom-defined low frequency, from 1 pulse-every-two- seconds to 1 pulse-per-day.
  • Page 39 RT430 Figure 19: Serial port RS232 e RS422/485 The serial port is compatible with RS232 and RS422/485 standard, and it has the following pinout: TABLE 21: Serial port pinout DB9 male Sinal OUT (RS232 level output with user-programmable signal) V+ (RS232 level voltage reference of the internal converter) 422/485 TX+ 422/485 TX- The bitrate, format (number of data bits, party, number of stop bits) and datagram type can be configured...
  • Page 40: Dry-Contact Relay (Locked)

    GPS Grandmaster Clock 2.15 Dry-contact relay (L OCKED RT430 has 1 dry-contact used for remotely signaling the synchronism state of the unity, shown in Figure 20 Length of cables connected to these terminals should not exceed 5m (16ft). See Chapter 1 for information on switching capacity limitations.
  • Page 41: Type Test

    RT430 See details about log files access in Chapter Figure 22: Connection diagram of event input, used to verify synchronism signal 2.17 Type Test TABLE 22: EMC tests were performed according to IEC 60255-26 referring to the following standards IEC 61000-4-2:2008 6kV contact / 8KV air IEC 61000-4-3:2006 10 V/m...
  • Page 42 GPS Grandmaster Clock A.C. and d.c. voltage dips Test level: 0% residual voltage Duration time a.c.: 1 cycle d.c.: 16,6ms Test level: 40% residual voltage Duration time a.c.: 12 cycles d.c.: 200ms IEC 61000-4-11:2004 IEC 61000-4-29:2000 Test level: 70% residual voltage Duration time a.c.: 30 cycles d.c.:500ms...
  • Page 43 RT430 Test level: 15 % of rated d.c. value IEC 61000-4-17:1999 Test frequency: 120Hz, sinusoidal waveform. Voltage oscillation frequency: 1MHz IEC 61000-4-18:2006 Differential mode: 1kV peak voltage; Common mode 2,5kV peak voltage Shut-down ramp: 60s Gradual Startup Power off: 5m Start-up ramp: 60s Radiated emission Limits:...
  • Page 44 GPS Grandmaster Clock TABLE 24: Environmental tests -40°C, 16 hours (Cold) IEC 60068-2-1 ‘IEC 60068-2-2 +85°C, 16 hours (Dry heat) 95% no condensation, 55°C (Damp heat) IEC 60068-2-30 -40°C to 85ºC / 9 hours / 2 cycles (Change of temperature) IEC 60068-2-14 Class 2 (Vibration) IEC 60255-21-1...
  • Page 45: Communication

    RT430 3. COMMUNICATION Communication RT430 has 2 Ethernet 10/100BaseT communication interfaces with RJ45 connector E 1 and THERNET 2 enabling redundancy. shows one of the electrical communication interfaces. Figure 23 THERNET Connect a CAT5 cable with a RJ45 connector in each port. The L led indicates that the cable is transmitting signal, and the A led blinks when there is data exchange.
  • Page 46: Network Port And Communication Protocols

    GPS Grandmaster Clock TABLE 26: Ethernet 2 port are listed below IP Address Netmask Broadcast Factory’s default port to connect to the Gateway is the Ethernet 1. The factory default setting of Gateway and DNS Server are: TABLE 27: Gateway and DNS Server.
  • Page 47 RT430 For direct communication using the electrical E port, connect a 10/100 BaseT cross-over network THERNET cable between the computer and the unit, as shown in Figure 24 . The network cable should have the following pinout: TABLE 29: Cross-over network cable pinout. 568 A 568 B Striped white/green...
  • Page 48: Communication Via Ethernet Network

    GPS Grandmaster Clock IP Address Network mask Configure manually the computer local network connection to: TABLE 31: Computer IP address, broadcast, and network mask. IP Address Network mask If the unit is not using factory default settings, see Chapter 5 for instructions to visualize the current IP address via local interface.
  • Page 49: Equipment Access

    RT430 After connecting the unit to a network, see Section 3.6 for details on accessing the unit. To check if the unit is accessible, it is possible connect a cross-over network cable to the computer from a terminal using command line, and run a ping command to the IP address of the unit. Equipment access A Web Interface allows configuring and monitoring the unit through a web browser, as the unit it is connected to a local network.
  • Page 50: Configuration

    GPS Grandmaster Clock 4. CONFIGURATION Web Interface RT430 has a Web Interface that allows configuring network parameters, time synchronism, output synchronism and PTP standard, updating firmware, changing key, controlling access and manipulating configurations. To connect to the Web Interface, enter the unit E port IP address into the address field of a web THERNET browser.
  • Page 51: Ethernet 1/2

    RT430 Figure 26: Section to configure network parameters of the unit 4.2.1 Ethernet 1/2 The E ports allow communication via TCP/IP or UDP/IP networks. For details on network interfaces, THERNET Chapter 3.  MAC Address: informs the MAC address of the network port. ...
  • Page 52: Dns Server

    GPS Grandmaster Clock 4.2.3 DNS Server The DNS server configuration allows the RT430 to communicate with the DNS server from a local subnet.  The IP Address field allows entering the IP Address of the network's name server (only decimal numbers).
  • Page 53: Time Features

    RT430 MAC Adress 00:00:00:00:00:00 Not configurable IP Adress Only decimal numbers Network Mask Only decimal numbers Broadcast Only decimal numbers THERNET MAC Adress 00:00:00:00:00:00 Not configurable IP Adress Only decimal numbers Network Mask Only decimal numbers Broadcast Only decimal numbers...
  • Page 54: Time Settings

    GPS Grandmaster Clock Figure 28: Section to configure time parameters 4.3.1 Time Settings  The field Timezone allows configuring the time zone of the unit, and converting UTC time to local time. Half hour time zones are supported.  The field DST, when enabled, allows configuring the beginning and the end of Daylight Saving Time. 4.3.2 Sending configuration The <A...
  • Page 55: Configuration Summary

    RT430 In case the new configuration is not transmitted to the unit, the changes will not be saved and will be discarded once the Web Interface is closed. 4.3.3 Configuration summary The table below presents all configurable time parameters and its possible values and variables. TABLE 34: Summary of configurable time parameters.
  • Page 56: Outputs

    GPS Grandmaster Clock Figure 30: Section to configure signals applied to synchronism outputs 4.4.1 Outputs  Output, Signal, Polarity: allow individually configuring synchronism signal and its polarity of synchronism outputs;  TTL 1/2: allows configuring the TTL-level electrical outputs 1 and 2. Each output has two terminals, one screw, and other BNC.
  • Page 57: Serial Datagram

    RT430 100PPS-Output with 100 pulses-per-second; PPX - Output with programmable frequency pulses; PPM - Output with 1 pulse-per-minute; item TMARK - Output with programmable time; IRIG-B - Output with IRIG-B004 signal; DCF77 - Output with DCF77 signal. It is also possible to choose normal or inverted polarity for each output individually. ...
  • Page 58 GPS Grandmaster Clock  %H %M %S %d %m %y %x correspond to 2 characters;  %j : correspond to 3 characters (length(str) + 1 for each event);  %Y correspond to 4 characters (length(str) + 2 for each event) ...
  • Page 59: Sending Configuration

    RT430 <LF> Line feed (ASCII 10) <CR> Carriage returns (ASCII 13) checksum type 1 ‘%’ Caractere ‘%’ (ASCII 37) ‘_’ is the character ‘blank (ASCII 32). Checksum type 1 consists of two hexadecimal digits, which represent the result of a XOR from all characters comprised between `\$' and `*' (`\$' e `*' not included).
  • Page 60 GPS Grandmaster Clock The table below presents all configurable parameters of the synchronism outputs, and its possible values and variables. TABLE 36: Summary of configurable parameters of synchronism outputs. Outputs signal: OFF, PPS, 100PPS, PPX, PPM, TMARK, IRIG-B e DCF77 Output TTL 1/2 polarity: normal ou inverted signal: OFF, PPS, 100PPS, PPX, PPM, TMARK, IRIG-B e DCF77...
  • Page 61 RT430 signal: OFF, PPS, 100PPS, PPX, PPM, TMARK, IRIG-B e DCF77 (sinais) RS232 polarity: normal ou inverted h: 00 até 23 (hours) TMARK m: 00 até 60 (minutes) s: 00 até 60 (seconds) 60 seconds até 24 hours Cable delay compensation 0 até...
  • Page 62: Ptp Configuration

    GPS Grandmaster Clock PTP Configuration The PTP section of the Web Interface, shown in , allows the user to configure synchronism Figure 32 parameters using PTP protocol. This setting is possible only for port ethernet 1. Figure 32: Section to configure PTP parameters 4.5.1 Profile RT430 has a set of features attributed to the application of PTP protocol, which the IEEE1588 standard...
  • Page 63: Domain Number

    RT430 3 seconds waiting time for receiving Announce messages.  Custom Profile: profile with all features freely configurable by a user.  Default Profile: profile partly configurable, with some predetermined features, which cannot be modified. The non-editable characteristics are shown in its respective fields. The non-editable characteristics are.
  • Page 64: Master And Slave Clocks

    GPS Grandmaster Clock 4.5.6 Master and slave clocks RT430 is pre-configured to act as master of the synchronism network. The selection of the field force operation as slave, allows the unit to be used as slave. When RT430 is used as master, BMC algorithm tie breaking criteria priorities should be attributed. The fields Grandmaster priority $\#$1 and $\#$2 allow configuring the priorities of both Ethernet ports, in which $\#$1 is the first and $\#$2 is the last tie breaking criterion.
  • Page 65: Configuration Summary

    RT430 go momentarily out of operation. Once the transmission is concluded, a message appears on the screen informing the PTP parameters change. Figure 33 shows the username and password window and the message after transmission. In case the new configuration is not transmitted to the unit, the changes will not be saved and will be discarded once the Web Interface is closed.
  • Page 66 GPS Grandmaster Clock Delay P2P or E2E Clock Slave: enables de use as slave Priority # 1 of 0 a 255 # 2 of 0 a 255 Intervals between sent messages Delay request 1/16 up to 32 seconds Announce 1/16 up to 32 seconds Sync 1/16 up to 32 seconds Response time of messages...
  • Page 67: Configurations Control

    RT430 Configurations control The S section of the Web Interface, shown in , allows updating the firmware, manipulating Figure 34 ETUP configurations, changing key, and changing configuration username and password. Firmware and key updates will be described in Chapter Figure 34: Section to update firmware, manipulate configurations, change key and change configuration username and password 4.6.1 Configuration management...
  • Page 68: Password Configuration

    GPS Grandmaster Clock Restore: allows transmitting the selected configuration file to the unit. By clicking <R > a window will ESTORE open requiring configuration username and password, according to Figure 35 . Enter the username and password and click <L >.
  • Page 69: Operation

    RT430 5. OPERATION Local access (IHM) RT430 local interface comprises a LCD display, two indicators and navigation buttons. Figure 37 shows the front panel of the unit. Figure 37: RT430 Front view 5.1.1 State indicators The L indicator indicates that unit is synchronized with time reference from at least 4 GPS satellites. OCKED This indicator blinks when the unit is searching for orbit data from GPS satellites, which is a common situation if the unit has been moved over long distances or has been out of operation for a long period of...
  • Page 70: Remote Access (Interface Web)

    GPS Grandmaster Clock Figure 38: Navigating the unit's local monitoring display Remote Access (Interface Web) RT430 has a Web Interface that allows monitoring the unit status in real time and checking general system information. To connect to the Web Interface, enter the unit E port IP address into the address field of a web THERNET browser.
  • Page 71: General Information

    RT430 Figure 39: Section to monitor the status of the unit in the Web Interface The unit status information is grouped into areas, as follows:  Equipment: shows operational information of the unit.  Locked: indicates if the unit is receiving information from at least 4 GPS satellites. If yes, the number of monitored satellites is indicated.
  • Page 72: Events Input

    GPS Grandmaster Clock Figure 40: Section to visualize general information of the system The system information is presented as follows:  Firmware Version: presents the current firmware version of the unit.  Serial Number: presents the serial number of the unit. ...
  • Page 73 RT430 Figure 41: Section of Web Interface to monitor timestamps of event input  Last Events: In the Timestamp area it is possible to visualize the last ten timestamps from signal received through the event input. The update of timestamps is not automatic. To visualize them, the button <U >...
  • Page 74: Maintenance

    GPS Grandmaster Clock 6. MAINTENANCE Synchronism failure (Locked Signaling) When the unit is operating without synchronism reference in the GPS antenna, the failure is signaled in different ways: Local interface, Web Interface, signaling relay, and data packets from IRIG-B, NTP, PTP e SNMP protocols.
  • Page 75: Irig-B Signal

    RT430 6.1.4 IRIG-B Signal When the bits are all in 0, the unit is in L state, i.e., there is synchronism reference in the GPS antenna OCKED input. In case the synchronism reference is disconnected or the signal is weak, the bits combination will differ from zero.
  • Page 76: Equipment Key Change

    GPS Grandmaster Clock Figure 42: Section to update firmware, manipulate configurations, change key and change configuration username and password To update the unit firmware, access the S section of the Web Interface by typing the unit IP address in a ETUP default browser and follow the steps below: 1.
  • Page 77 RT430 The S section of the Web Interface, shown in Figure 44 , allows updating the firmware, manipulating ETUP configurations, changing key, and changing configuration username and password. Firmware and key updates will be described in Chapter 4. Figure 44: Section to update firmware, manipulate configurations, change key and change configuration username and password.
  • Page 78: Cleaning Instructions

    GPS Grandmaster Clock Figure 45: Username and Password Window and the message after the transmission of the new key 5. After the change is completed, check the main page of the Web Interface. See more details Chapter 5 to ensure the correct operation of the unit and the enabled features. Cleaning instructions Before cleaning the equipment, make sure that the primary voltage is removed.
  • Page 79 RT430 4) Position the device in place where there is free space to work and make sure to install proper working and safety warnings at the location, also keep available all tools and aids that is going to be used; 5) Wait a few minutes so the capacitors may discharge;...
  • Page 80: Appendix A - Cortec

    GPS Grandmaster Clock APPENDIX A – CORTEC Variants IED Order Number Optional 11-12 14 15 16 Model Type RT430 GPS Grandmaster Clock RT430 Power Supply 1 110-250 Vdc / 100-240 Vac Power Supply 2 110-250 Vdc / 100-240 Vac Not installed Ethernet Interface 1 RJ45 copper 100BASE-TX for configuration only RJ45 copper 100BASE-TX for NTP server and...
  • Page 81 RT430 Antenna Cable No cable 15 m (50 ft) TNC Male to BNC Male RGC-58 antenna cable 25 m (82 ft) TNC Male to BNC Male RGC-58 antenna cable 40 m (131 ft) TNC Male to BNC Male RGC-58 antenna cable 75 m (246 ft) TNC Male to BNC Male RGC-08 low attenuation antenna cable 100 m (328 ft) TNC Male to BNC Male RGC-08 low...
  • Page 82: Appendix B -Irig-B Standard Summary

    GPS Grandmaster Clock APPENDIX B -IRIG-B STANDARD SUMMARY IRIG-B004 and IRIG-B124 Content Table A.1: IRIG-B standard summary. reference bit ( ) + 10 ms seconds 1 seconds (0 ... 59 or 60) + 20 ms seconds 2 + 30 ms seconds 4 + 40 ms seconds 8...
  • Page 83 RT430 + 210 ms hours 2 + 220 ms hours 4 + 230 ms hours 8 + 240 ms index bit (0) + 250 ms hours 10 + 260 ms hours 20 + 270 ms index bit (0) + 280 ms index bit (0) + 290 ms position identifier 3 ( )
  • Page 84 GPS Grandmaster Clock + 460 ms index bit (0) + 470 ms index bit (0) + 480 ms index bit (0) + 490 ms position identifier 5 ( ) The last 2 digits of the year (00 ... + 500 ms year 1 + 510 ms year 2...
  • Page 85 RT430 + 680 ms Time Offset 8 + 690 ms position identifier 7 ( ) + 700 ms Time Offset /2 + 710 ms Time Quality 0000 (0) : locked + 720 ms Time Quality 1111 (F) : no-time + 730 ms Time Quality 1011 (B) : never locked + 740 ms...
  • Page 86 GPS Grandmaster Clock + 920 ms time-of-day 2048 + 930 ms time-of-day 4096 time-of-day 8192 + 940 ms + 950 ms time-of-day 16384 + 960 ms time-of-day 32768 time-of-day 65536 + 970 ms + 980 ms index bit (0) + 990 ms position identifier 0 ( ) RT430-TM-EN-5...
  • Page 87: Appendix C - Ptp Standard Concepts (Ieee1588)

    RT430 APPENDIX C - PTP STANDARD CONCEPTS (IEEE1588) Description The Precision Time Protocol (PTP) is an ultimate time synchronism accuracy protocol for Ethernet networks. On a local area network, it achieves clock accuracy in the sub-microsecond range, making it suitable for applications where synchronism is essential to the measurement system.
  • Page 88 GPS Grandmaster Clock The algorithm establishes an order of searching for the attributes and from the results, determines which will be used as time source.  Boundary Clock: According to IEEE1588 standard, a boundary clock has multiple PTP ports in a domain and maintains the timescale used in the domain.
  • Page 89 RT430 The first revision of the IEEE1588 standard specifies only multicast network where a PTP message sent by a network port can be received by all other ports connected to the same network. The great advantage of the multicast network is that the master clock sends only one packet of time synchronism to the network, and it is received by all slave devices connected to that network.
  • Page 90 GPS Grandmaster Clock ̃ ̃ Combining the above two equations, we find that: ̃ The clock now knows the offset õ during this transaction and can correct itself by this amount to bring it into agreement with their other master. Network protocols IEEE1588 standard defines the network layers where the PTP protocol will be applied.
  • Page 91 RT430 Delay measurement mechanism ccording to IEEE1588 a slave clock is capable of measuring the delay of message propagation that represents the time that a message takes to cross the master-slave path. The measurement of this delay is necessary to perform a time correction of the time of receipt of the message in relation to the time it was sent.
  • Page 92 GPS Grandmaster Clock sends only one packet containing synchronism information to the network and this packet is received by all slave devices connected to this network. Among the messages specified by IEEE1588 standard, the ones that stand out are related to synchronism information, timestamp and propagation delay.
  • Page 93: Appendix D - Serial Datagrams

    RT430 APPENDIX D – SERIAL DATAGRAMS RT430 can be configured to send datagrams through serial ports. The datagrams defined for the unit are ACEB, NEMEA GPZDA, and Meinberg. ACEB Datagrams ACEB datagram comprises 13 bytes, sent once per minute in second 02. The datagram information is described below.
  • Page 94 GPS Grandmaster Clock $GPZDA,hhmmss.0,DD,MM,YYYY,,*CC CR TABLE C.2: GPZDA Datagram Time Information Paramter Possible values Description 00 ... 23 hours 00 ... 59 minutes 00 ... 59 seconds 001 ... 366 julian day 01 ... 31 day of the month 01 ... 12 month YYYY 2000 ...
  • Page 95 RT430 TABLE C.4: GPZDA Datagram Checksum Information. Paramter Description Comments checksum two hexadecimal digits representing the result of exclusive OR of all characters between ‘$’ and ‘*’ (‘$’ and ‘*’ are excluded) Meinberg datagram Meinberg datagram comprises 32 characters, sent once per second. The datagram information is described below: STX D:DD.MM.YY;T:w;;uv__ ETX TABLE C.5: Meinberg Datagram Time Information.
  • Page 96 GPS Grandmaster Clock Table C.6: Meinberg Datagram Beginning and End Information Caractere ASCII ASCII Description start-of-datagram end-of-datagram espaço Table C.7: Meinberg Datagram Unit's Synchronism Information Paramter Description Commets ‘_’ se “locked”, ‘#’ if not status ‘_’ se “locked”, ‘*’ if not status RT430-TM-EN-5...
  • Page 97 RT430 APPENDIX E - GPS ANTENNA DELAY COMPENSATION The antenna cable affects the unit's performance in two different ways: GPS signal attenuation and GPS signal propagation delay. GPS Signal Attenuation GPS signal attenuation is related to cable type and overall cable length. When using the active antenna supplied by Alstom, total attenuation should not exceed 32 dB.
  • Page 98 GPS Grandmaster Clock The antenna cable delays GPS signal. In applications in which the ultimate time accuracy is desired, this delay should be compensated inside the unit. Typically, the delay introduced by coaxial cables is in the magnitude of 4 ns/m (1.2 ns/ft) of cable length. The exact delay can be computed by using: Where C = m/s is the speed of light,...
  • Page 99 RT430 APPENDIX F –APPLICATION EXAMPLES Application Example 1 - Synchronism Outputs In Application Example 1, shown in , IRIG-B outputs, synchronization via Ethernet with NTP Figure 46 protocol and serial datagrams to synchronize relays and a disturbance recorder are used. Also a transceiver optical-electrical (RT412 - Optical Transceiver) to transform an electrical output in optics to synchronize a relay and a distributor of signals (RT411 - Timing Distributor) that, from an output of the RT430, synchronizes three relays.
  • Page 100 GPS Grandmaster Clock Application Example 2 - Signal Distribution In Application Example 2, shown in Figure 47 are employed IRIG-B outputs to synchronize some IEDs, a disturbance recorder and a signals distributor (RT411 - Timing Distributor) that from an output of the RT430, synchronizes other four equipment.
  • Page 101 RT430 Application Example 3 - Connecting the Serial Port The Application Example 3, shown in Figure 48 Figure , illustrates the serial port connections RS232 and RS485 levels, used to synchronize a PLC and two relays, respectively. Figure 48: Application Example 3 - Connecting the Serial Port at Level RS232 Figure 49: Application Example 3 - Connecting the Serial Port at Level RS485 RT430-TM-EN-5...
  • Page 102 GPS Grandmaster Clock Alstom Grid © ALSTOM 2014. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project.

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