T I M ES Y N C H R O N I S E R

Telefault GPS

A simple and inexpensive substationclock time synchroniserTelefault GPSThe Telefault GPS provides output signal formats to match the requirements of all available Disturbance Recorders, Sequence ofEvent Recorders and SCADA systems.

This high accuracy synchroniser features:

System options:

Multiple time code output formats

Programmable sequence of event control

Front panel display of local time and position

Manufactured to BS EN ISO 9001

IRIG-B format output

Parallel BCD output

Multi pulse output capability

N.G.T.S. 3.9.7 format output

The Telefault GPS provides timing accurate to ±1µs usingthe international satellite Global Positioning System (GPS).Inexpensive and easy to install, it can be used with all makes ofequipment.

The ability to provide time synchronisation to 1µsaccuracy over a wide area, as covered by apower system network, has openedup new possibilities for the secureand reliable operation of electricalpower systems. Precise time-tagging of fault data is invaluablefor post-fault analysis and willultimately lead to improved efficiencyand greater reliability in system operation.

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Programmable clock rate generation

Simple installation

With over 30 years experience,

Hathaway is a market leader in the

development of instrumentation to

address the specific needs of power

utilities throughout the world.

Our areas of expertise include:

Fault / Event Recording

Power Quality Recording

Fault Locating

Circuit Breaker Testing

Circuit Breaker Condition

Monitoring

Remote Terminal Units,

Distribution Automation and

SCADA Systems

The Manufacturing Division has

been accredited to ISO 9001 which

underlines the company's

commitment to produce quality

products for a global market.

Our expertise, experience and

versatility allow us to introduce a

high degree of systems flexibility.

This has resulted in the development

of the Telefault GPS Time

Synchroniser.

The Telefault GPS - an inexpensive

method for accurately synchronising

the operation of Disturbance

Recorders, Sequence of Event

Recorders and SCADA systems.

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All trademarks and registered trademarks are properties of their respective companies and arehereby acknowledged.

C O M PA N Y OV E R V I E W

Compact and accurate . . . an ideal low cost receiver

With over 30 years experience,

Hathaway is a market leader in the

development of instrumentation to

address the specific needs of power

utilities throughout the world.

Our areas of expertise include:

Fault / Event Recording

Power Quality Recording

Fault Locating

Circuit Breaker Testing

Circuit Breaker Condition

Monitoring

Remote Terminal Units,

Distribution Automation and

SCADA Systems

The Manufacturing Division has

been accredited to ISO 9001 which

underlines the company's

commitment to produce quality

products for a global market.

Our expertise, experience and

versatility allow us to introduce a

high degree of systems flexibility.

This has resulted in the development

of the Telefault GPS Time

Synchroniser.

The Telefault GPS - an inexpensive

method for accurately synchronising

the operation of Disturbance

Recorders, Sequence of Event

Recorders and SCADA systems.

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�

�

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All trademarks and registered trademarks are properties of their respective companies and arehereby acknowledged.

Compact and accurate . . . an ideal tool to maximise the value of data to power utilities

C O M PA N Y OV E R V I E W T E C H N I C A L D E S C R I P T I O N S P E C I F I C AT I O N

The Telefault GPS offers electrical power systems operatorsan inexpensive means of significantly improving both thevalue of their investment in equipment and the usefulnessof the acquired data. Using time signals transmitted by theNAVSTAR constellation of GPS satellites, the Telefault GPScan provide output signal formats to accurately synchronisethe operation of all currently available DisturbanceRecorders, Sequence of Event Recorders and SCADAsystems.

The GPS signals from NAVSTAR provide all-weather, 24hours per day coverage. The information generated iscrucial for modern navigation and also has many uses inthe electricity industry.

However GPS signals, as they are generated, are not in aform which is convenient for use with existing dataacquisition equipment on power systems. The timesynchronisation requirements of the real time clocks withinsuch equipment varies widely. Some use strobe pulses ofvarious amplitudes, durations and frequencies. Others usetime code signals, usually as a serial message to astandard such as IRIG-B or MSF; yet others use a proprie-tary standard. Moreover, in most cases, operators prefer touse their local time standard.

The Telefault GPS meets all the needs of all differingequipment types and manufactures. Local time offset fromUTC can be set by the operator or at the factory.

OUTPUTSThe standard version of the Telefault GPS provides outputsof one pulse per second and a programmable eventoutput, each with its own indicator. All outputs areavailable simultaneously, with each locked to the samereference, i.e. the UTC time standard transmitted by thesatellites. The pulse outputs can be configured to providevoltage pulses of various levels and duration or “contactclosure” using either electromechanical or solid state relaysor optical isolators.

In addition to the pulse outputs, a serial message isgenerated for equipment needing serial time synchronisa-tion. The serial output baud rate is selectable and theformat can be customised. As options, other forms of “timeof day” message can be provided including IRIG-B(modulated and demodulated). Parallel output options,such as BCD, are also available.

A continuous pulse stream output, programmable forfrequencies up to 1MHz phase locked to UTC, is providedfor disturbance recorders that allow external samplingclocks. This enables synchronous sampling so that thephase differences between signals recorded at separatelocations can be determined.

The Telefault GPS can also be used as a programmableSequence of Event Generator to permit widely separatedequipment to be operated in a precisely timed sequence.This could involve protective relay test sets, circuit breakers,tap changers, etc.

Fault Recorder with GPS Time Tagging and Synchronous Sampling

Hathaway's policy of continuous product improvement may mean that equipment supplied differs slightly from this specification.

PROGRAMMING

INDICATORS

OUTPUTS

OPTIONAL OUTPUTS

Programmable by local PC connection via one ofthe serial ports, all major parameters may be al-tered.Automatic daylight saving correction.Time zone correction.Programmable single short or repetitive event gen-eration output via dry contact (optional).

Power.Event.Watchdog.GPS data.GPS locked.

2 row x 20 character backlit LCD showing localdate and time, instrument status and / or position.

One pulse per second, accuracy 1µs with GPSlocked.One event (default one pulse per minute).All isolated dry contacts to 220Vdc, 100mA maximum.

Isolated and period programmable, in 1µs steps, to inte-ger fractions of one second (default 55Hz).

Two isolated RS232 ports with programmable baud rate,start / stop and parity bits. Message format also pro-grammable (preferably specified at time of order).

Serial time code signal modulated and DC level stan-dards.

3:1 fixed.IEEE standard 959-1988.D8, I.0 - 10Vpp (unloaded), 0 - 3Vpp(50 load).150 .

TTL / CMOS.

LEDs indicate:

LCD:

Pulse:

Frequency:

Serial:

IRIG-B:

Modulated carrier (1kHz):

DC level:

Modulated ratio:-Compatibility:-Compliance:-Amplitude:-

Output impedance:-S

S

BCD output:

Dry contacts and isolated:

Power supply:

19” rack mountable:

Parallel 32 line time code output with 1ms resolution.

GPS sync lost.Watchdog.Power fail.

85 - 250Vac; 35 - 63Vdc or 90 -250Vdc (specified at time of order).10W.

Battery backup of all programmed parameters duringpower fail.

448.8mm (17.68”).255mm (10.04”).2U - 87mm (3.43”).5kg (11lbs).

Voltage range:-

Power:-

Width:-Depth:-Height:-Weight:-

ALARMS

PERFORMANCE

PHYSICAL DIMENSIONS

Schematic of GPS Protocol Translator

RS232

1pps

Strobed Outputs

Time-codeOutputs

Frequency Output

RS232

RS232 / 485etc.

GPSReceiver

Microprocessor

Protocol TranslatorLocal Time OffsetEvent Generator

etc.MSF

IRIG-B

BCD

Display

Oscillatorand

Dividers(Hardware)

GatingCircuits

Controland

Setup

Telefault GPS

POWER

TELEFAULT GPSEVENT 1 pps WATCHDOG

GPSDATA

GPSLOCKED

15 Wildflower WayBelfastBT12 6TANorthern IrelandTelephone: +44 28 90 225200Fax: +44 28 90 225225Internet: www.hathaway-systems.com

8228 Park Meadows DriveLittletonColorado 80124U.S.A.Telephone: +1 303 799 8200Fax: +1 303 799 8880e-mail: info@hathawaycorp.com

Brewery RoadHoddesdonHertfordshire EN11 8HFEnglandTelephone: +44 1992 463502Fax: +44 1992 463507