Subscribe to Our Youtube Channel
Summary of Contents for KEHUI T-GPS3000
- Page 1 T-GPS3000 Time Synchroniser User Manual V1.2 Kehui International Ltd. 2 Centrus, Mead Lane, Hertford Hertfordshire, SG13 7GX United Kingdom Phone: (+44) 1920 358990 Fax: (+44) 1920 358991 Website: http://kehui.com...
- Page 2 Legal Notices The copyright of this material belongs to Kehui International Ltd. No company or individual may extract, copy or translate in any way without the written permission of the copyright owner. Copyright infringement will be investigated. This product complies with the design requirements for environmental protection and personal safety.
-
Page 3: Table Of Contents
Table of Contents SAFETY INSTRUCTIONS ......................5 PRODUCT OVERVIEW ........................6 Application ..........................6 Master Slave Designation ......................6 Product Features ........................6 Technical Data Sheet ........................7 LAYOUT ............................8 Front Panel ..........................8 Rear Panel ..........................9 Module Configuration ........................ 9 Outputs............................. - Page 4 Troubleshooting ........................40 Alarms ............................ 41 TRANSPORTATION ........................41 Transportation considerations ....................41 Storage conditions, storage period and precautions ..............41 UNPACKING AND INSPECTION ....................42 APPENDIX A: T-GPS3000 PACKING LIST ..................42 T-GPS User Manual Version 1.2 | 4...
-
Page 5: Safety Instructions
Indicates that this is a useful guideline based on field practice. Use of Please be sure to use Kehui’s spare parts to ensure the safe and reliable use accessories: of this instrument. Using accessories made by other companies will make any warranty null and void. -
Page 6: Product Overview
Relay protection experimentation. Master Slave Designation A T-GPS3000 can be designated as a Master or slave device. It is necessary to have a slave unit when a single GPS device does not have sufficient outputs to synchronise all the equipment in the substation, and there is a restriction in the number of antennas that can be set up. -
Page 7: Technical Data Sheet
Technical Data Sheet − DC 190-260V Power Supply − AC 190-260V, 47Hz-63Hz Power Consumption: 5W maximum − 90s maximum typical Data Acquisition Time During Start-Up − 90s maximum with location changes − 45s maximum without location change − 20s maximum after power supply interruption Time Accuracy 1 µs... -
Page 8: Layout
Layout Front Panel The front panel is shown below in Figure 1. Figure 3.1: Front Panel ⚫ Power The light indicates that the power is on. ⚫ Synch. Lost When the equipment is initially powered-up, this indicator will blink, showing that the GPS3000A is not synchronised;... -
Page 9: Rear Panel
Rear Panel Figure 3.2 shows the detailed layout of a fully configured rear panel. Figure 3.2: Rear Panel Module Configuration The rear panel shows the module configuration, which has 10 blank module positions. The modules include Power, Outputs and Signal Input (Antenna). The Power Module and Signal Input (Antenna) Module are mandatory. -
Page 10: Customisation
• DCF77 Code: since this code is used rarely, it only is output from a Dry Contact. T-GPS has 7 blank modular spaces for the various optional modules. However, for power consumption reasons, the maximum number of TTL modules is limited to three, the maximum number of 422/485 is also three and IRIG-B has a maximum of four modules. -
Page 11: Module Descriptions
Module Descriptions Power Module The Power Module provides the power supply for the T-GPS3000, the layout is as the diagram below shows. A) ON/OFF: to power on or off the GPS. B) Fuse: 5A fuse is inside (Note: The unit should be powered off when replacing the fuse). -
Page 12: Irig-B Signal Input I Module
IRIG-B Signal Input I Module Each IRIG-B signal input module accepts two TTL and 422 switchable level signals. They can indicate whether they are connected and running normally. Both level signals are accessed through a DB9 socket. Pins 1 - 4 of the socket are connected to the first 422 level signal, 1 and 4 are connected to "+"... -
Page 13: Irig-B Signal Input Module
IRIG-B Signal Input Module Each IRIG-B signal input module accepts two TTL and 422 switchable level signals. They can indicate whether they are connected and running normally. Both level signals are accessed through a DB9 socket. Pins 1 - 4 of the socket are connected to the first 422 level signal, 1 and 4 are connected to "+"... -
Page 14: Dry Contact Pulse Output
Dry Contact Pulse Output Maximum twelve inputs. Two connectors make a pair and are marked with ‘c’ and ‘e’ from the top. The left column comprises numbers. 1, 3, 5, 7, 9, 11 and the right one is 2, 4, 6, 8, 10, 12 from top to bottom. Each output can be set as an A, B, C or D pulse via the jumper on the PCB. -
Page 15: Serial Port Output Module
Serial Port Output Module The module has up to four serial signals, each routed to a DB9 interface. Each output can be configured as an RS-232 level or RS-422 level output. The four-position DIP switch on the board is used to set the baud rate of the serial port output. -
Page 16: Serial Port Output Module Ii
Serial Port Output Module II The module has up to four serial signals, each routed to a DB9 interface. Each output can be configured as an RS-232 level or RS-422 level output. 20S1 to 20S4 on the printed board are used to control the outputs of COM1 to COM4 respectively. -
Page 17: Ttl Output Module
TTL Output Module A maximum of twelve TTL outputs are provided in each module, each output can be set to be either a Pulse or an IRIG-B output. The terminals are in pairs with the upper one being + and lower one -. The left column is marked 1, 2, 3, 4, 5 and 6;... -
Page 18: Rs485 Output Module
RS485 Output Module A maximum of twelve RS485 outputs are provided in each module, each output can be set to be either a Pulse or an IRIG-B DC output. The terminals are in pairs with the upper one being + and lower one -. The left column is marked 1, 2, 3, 4, 5 and 6;... -
Page 19: Dcf77 Signal Output Module
4.11 DCF77 Signal Output Module A maximum of twelve DCF77 outputs are provided in each module. The output format is as follows: 4.12 Alarm Output Module Each Alarm Output Module provides 4 outputs. They are; Power Lost Alarm, Wrong Alarm, Sync. Lost Alarm and IRIG-B Lost Alarm. If this T- GPS3000 unit is used for slave device, the Sync. -
Page 20: Irig-B Optical Input Module I
4.14 IRIG-B Optical Input Module I Each module has inputs for two IRIG-B optical signals (used for GPS extension time synchronisation) and can indicate whether the optical signals are connected and operating normally. There are four indicators on the panel, from top to bottom: IRIG-B1, RUN1, IRIG-B2 and RUN2. -
Page 21: Optical Output Module
4.16 Optical Output Module Each optical signal output I module provides 8 optical signals. Each signal can be set to IRIG-B DC; Pulse A, B, C, D; TXD; IRIG-B DC’, pulse A’, B’, C’, D’; and TXD’ optical signal outputs. Jumpers 20S1 to 20S8 control the outputs, as follows: 20S1 20S1... -
Page 22: Host Interconnect Interface Module
4.17 Host Interconnect Interface Module Each host interconnect interface board can output two optical signals, two TTL level signals and two RS422 level signals. The optical signals are output through the optical ports and the TTL and RS422 level signals are output through the DB9 interface socket. Pins 1 - 4 of the DB9 output two RS422 level signals;... -
Page 23: Beidou Signal Input Module
When 19S1 is as shown in (a) Optical output 1 is providing an IRIG-B DC optical signal When 1951 is as shown in (b) Optical output 1 is controlled by Pulse A When 2S01 is as shown in (c) Optical output 1 is controlled by Pulse B When 2S01 is as shown in (d) Optical output 1 is controlled by Pulse C When 2S01 is as shown in (e) Optical output 1 is controlled by Pulse D When 2S01 is as shown in (f) Optical output 1 is providing a TXD optical signal... -
Page 24: Ptp Signal Output Module
4.19 PTP Signal Output Module Each PTP output can provide up to four PTP optical signals. Each signal requires two physical interfaces, one transmitting (TX) and one receiving (RX). The output interface is a multi-mode ST interface with a maximum transmission distance of 2Km. The PTP output signal can be connected directly to the PTP client or through a dedicated PTP switch. - Page 25 The delay compensation of the "Delay Compensation Input Board" and "Delay Compensation Output Board" is set by Kehui’s "GPSDelayTimePanel.exe" software. The software sends the delay compensation value by sending a serial message to the delay compensation module. “Serial port settings" is shown below:...
- Page 26 Click "Serial Port Configuration"-> "Open Serial Port", click "Advance Time" to enter the delay compensation value. The basic compensation unit is 100ns. For example, when the protection cell to be synchronised, is 500 meters away from the main control building, the "delay compensation input board"...
-
Page 27: Delay Compensation Output Module
4.21 Delay Compensation Output Module Each delay compensation output modules provides 8 optical IRIG-B signals. The S2 code jump switch labelled "No Time Delay" on the printed board is used to set whether the output is compensated. When the S2 code jump switch is short- circuited (plug in a short-circuit), the output signal is not compensated. - Page 28 The "Delay Compensation Output Board" is also set through the "GPSDelayTimePanel.exe" software, but the serial port connection is a little more complicated. The serial line needs to be connected to the 19XS8 single-row pin on the printed board through the transfer line to set. The wiring diagram is shown in the figure below.
-
Page 29: Working Principle
Working Principle Antenna Receiver Control/Setup and Watchdog Pulse A Programmable Pulse B Pulse Pulse C LED& Pulse D Keyboard RS232 RS422 IRIG-B Coder IRIG-B DC IRIG-B AC DCF77 Figure 5.1: Schematic of T-GPS3000A GPS Receiver This receiver is the module used to receive Satellite signals, it outputs a pulse at 1 PPS to an accuracy of 1 µS, and provide UTC time, date and the precise location. -
Page 30: Installation And Adjustment
• Check that the labelling of the T-GPS3000 corresponds with the order. If there are any of the above issues at the point of delivery ensure Kehui is notified without delay. Installation T-GPS3000 is designed for installation in a standard 19-inch rack. It can be mounted alone or with other devices as shown here. -
Page 31: Master Slave Schemes
There is access for up to fourteen modules to provide various functionality within the device. Modules must be chosen when ordering, as the module positions will change depending on which modules are included. It should be noted that the inputs read from right to left on the rear of the unit (i.e., Input 1 is at the extreme right position). -
Page 32: Antenna
6.3.3 Redundant Master and Slave Figure 6.5 Redundant Master and slave system Where the system requires a higher level of security, this scheme protects against the loss of the GPS signal at one of the antennae, or a hardware failure in a master unit. Connections are as in 6.3.2. - Page 33 Another important consideration is safety; a lightning protection device (not supplied) should be mounted in close proximity to, and above, the antenna to prevent damage being caused by a lightning strike. As further protection, a surge protective device (SPD) is connected in series with the antenna cable is provided (see below): Figure 6.7 Surge protective device The SPD should be mounted directly on to the copper ground bar of the cabinet.
-
Page 34: Antenna Installation
Antenna installation The following are some suggestions for the correct installation of the antenna. Figure 6.8 shows the correct and incorrect method of mounting. Figure 6.8: Antenna Mounting Location The T-GPS3000A should be mounted in a location where the signal is strongest and the antenna cable length is minimised. -
Page 35: Settings
Brightness Adjustment The third LED segment from the left is the Brightness Indicator, ‘0’ is the minimum and ‘F’ is the maximum brightness. When the T-GPS3000 is in working mode, pressing ‘‘and ‘+’ will adjust the brightness of the LED. -
Page 36: Menu Set-Up
In running mode, pressing ‘ITEM’ and ‘ENTER’ together allows access to the set-up menu. The First LED position from the left gives the Menu option when the T-GPS3000 is under setting mode. Pressing the ‘Item’ button once will increase the value by one. The meaning of each menu option number is given in the following sections. - Page 37 7.3.3 Setting the Daylight Saving Time Start Date Menu option 8: The fourth digit from the left represents the tens of the number of the month in which DST starts; Press to enter and press ‘+’ to set it as 0 or 1; the fifth digit from the left is the unit value of this month;...
- Page 38 7.3.6 Setting the Daylight Saving Time End Date Menu option 11: The fourth digit from the left represents the tens of the number of the month when DST finishes; Press to enter and press ‘+’ to set it as 0 or 1; the fifth digit from the left is the units;...
-
Page 39: Output Ports
7.3.9 Setting of the Output Time Interval of TXD1 In certain applications there is a requirement for an additional serial port output TXD1, which may require a delayed output time. This is provided by menu option 14, which can be set as follows: Set the output time interval of the second TXD1. -
Page 40: Maintenance And Troubleshooting
If the Synchronisation Indication light blinks during running, this indicates that the T-GPS3000A is not synchronised, check the connection and the antenna as above. If the problem persists after completing the above, please contact Kehui (via info@kehui.com or your normal local contact) -
Page 41: Alarms
8.3.1 Wrong Alarm This indicates that the T-GPS3000 has mal-operated. When the Wrong Alarm is activated, the operator should check whether the power indicator is on and if not, power on the instrument using the on-off switch at the rear of the power module. If this is unsuccessful, check the fuse and replace it if necessary. -
Page 42: Unpacking And Inspection
Antenna Mounting Kit Surge Protection Device (SPD) Earth cable for SPD Connection cable for SPD (To T-GPS unit) User Manual Kehui International Ltd is a company registered in England and Wales with Company Number 10283200 T-GPS User Manual Version 1.2 | 42...
Need help?
Do you have a question about the T-GPS3000 and is the answer not in the manual?
Questions and answers