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TRANSFIXOn-Line DGA andMoisture for Transformers
The TRANSFIX is a new generation of on-line DGAequipment giving essential insight into the condition oftransformers.
Extensive use proves that TRANSFIX providesreliable information and represents an invaluable tool forAsset Management:
DGA & A Water8 gases plus moisture and nitrogen.
No ConsumablesNo carrier gases or calibration gases required.
Minimal MaintenanceReduces expense and inconvenience for user.
Comms OptionsExtensive local and remote communications options.
Alarm SettingsSophisticated programmable alarm system.
Easy InstallationSimple, straightforward procedures.
Local DisplayLCD Display provides up to date information on site.
Hourly SamplingSampling rates settable down to once per hour.
Kelman PerceptionPC software allows downloading, graphical display,trending and analysis of results 3). Analysis ofresults using gas levels, Duval’s Triangle, ratios andrates of change. Optional automatic downloading of
Load MonitoringAllows results to be analysed with the loading of thetransformer.
External SensorsAdditional inputs are available for transformer loadsensor and up to 5 other sensors.
Reliable Gas ExtractionNo use of membranes or vacuum extraction.
TRANSFIX
Fig 1 - TRANSFIX.
Accurate knowledge of thecondition of transformersis essential for all electricalnetworks and on-line monitoring of critical transformers isincreasingly vital. Thisinformation allows valuableassets to be maximised andexpensive failures to beavoided.
Dissolved Gas Analysis (DGA)and moisture measurement ofthe insulation oil are recognisedas the most important testsfor condition assessment oftransformers.
AvoidAA costly unplannedoutages.
Transformer faults detected intheir infancy.
Transformer output optimizedsafely, maximising asset.
Transformer ageing can becalculated.
TypeTT of fault can befrom results.
TECHNICAL FEATURESAA
Uses photo-acoustic spectroscopy to give highlyreliable results.
8 target gases plus moisture measured.
Estimation of nitrogen and total gas content for freebreathing transformers.
Full embedded processor – over 2 years of data at adefault sampling rate of 4-hourly, stored internally.
Non-volatile memory storage to prevent loss of data.
Discrete sampling gives more rapid response to gasrises. No ‘averaging’ of DGA results.A
ALARMS
TwoTT Sunlight Visible front panel LED Arrays (Redand Yellow)YY and three Alarm Relay contacts, each
All alarms can be set or changed locally or remotelyusing Kelman Perception PC Software.
Six alarm setting screens or scenarios are availablethat can set alarms based on the level of eightgasses, TDCG, and moisture, and rates of changefor each gas.
Each screen can activate one of three alarm relays,the red or yellow front panel indicator or send a SMSmessage if equipped with the optional cellular GSMor CDMA modem.A
Four dryNO and NC provided; 5A 250A VAC, 5VV A 30VDC.A
Caution mode and alarm mode can be used toincrease sampling frequency.
The alarm results of each screen are independent of the other screens.
COMMUNICATIONSAA
TwoTT separate channels for remote communications,plus local USB connection and Ethernet connection.
Communications protocols supported includeMODBUS, MODBUS/TCP, DNP3.0 and IEC61850.PP
Modules available for connection via RS232, RS485,Ethernet, PSTN modem and GSM or CDMA wirelessmodems.
ON-LINE DGA AND MOISTURE
Fig 2 - TRANSFIX installations
FOR TRANSFORMERS
Fig 3 - Perception PC Software
Transformer load sensor included.
Up to 5 other analogue sensor inputsavailable, including 4-20mA input andPT100.
Three 12 to 30VDC digital inputs.
TECHNICALSPECIFICATIONPARAMETER VALUE/MEETS
GAS MEASURED MEASUREMENT RANGE (ppm)
HYDROGEN (H2) 5 - 5,000
METHANE (CH4) 2 - 50,000
ETHANE (C2H6) 2 - 50,000
ETHYLENE (C2H4) 2 - 50,000
ACETYLENE (C2H2) 0.5 - 50,000
CARBON MONOXIDE (CO) 2 - 50,000
CARBON DIOXIDE (CO2) 20 - 50,000
OXYGEN (O2) 100 - 50,000
ACCURACY ± 5% or ± LDL (whichever is greater)
WATER 0-100% RS (given at 25oC, or at measured oil temp, or ppm)
NITROGEN (N2) 10 – 150,000 ppm, accuracy ±15%
ENVIRONMENTAL
EXTERNAL TEMP RANGE -40 to 55oC
OIL TEMPERATURE RANGE -40 to 120oC
OPERATING HUMIDITY 10 - 95% RH non-condensing
ENCLOSURE IP55
WEIGHT Less than 70 Kg (155 lbs)
POWER REQUIREMENTS 90 - 250 Vac; 47 - 63Hz; 150W; 8A max
Single phase Alarm Relays: NO and NC provided, 5A 250VAC, 5A 30VDC.
MEASUREMENT FREQUENCY Variable - 1 per hour to 1 per day
(free breathing transformer)
While every effort has been made to ensure that the information given is accurate, Kelman Ltd
reserve the right to change any of the details or specifications in this document without prior notice .
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v1.6 intelligent power
Head OfficeKelman Ltd.Lissue Industrial Estate EastLissue RoadLisburn BT28 2RBUnited Kingdom
Tel: +44 (0) 28 9262 2915Fax: +44 (0) 28 9262 2202E-mail: [email protected]: kelman.co.uk
Company Reg. No. NI 27892
