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ISO 9001 Certified


Vanguard Instruments Company, Inc., Electronic Testing Equipment, Ontario, CA
       

LTCA-10

Load Tap Changer Analyzer

 
       

[ View Interactive Demo ]
9033-UC

The LTCA-10 Analyzer is a second generation load tap changer analyzer. The LTCA-10 accurately measures winding resistance of highly inductive power transformers. Triple resistance-reading channels allow the measurement of three winding resistances simultaneously. Four-wire (Kelvin) connections provide high accuracy and require no lead compensation. A special feature of this device is its ability to measure and graph the resistance trace of a transformer LTC during operation. Using a 60Vdc power supply, the LTCA-10 is capable of outputting 10 amperes.

  • Auto discharge circuit for operator safety
  • 3 resistance reading channels including one dynamic channel
  • Digital resistance reading from 1 micro-ohm to 500 ohms
  • Calculate equivalent resistance value at reference temperature
  • Stores 50 static records and 20 dynamic records
  • Built-in 4.5-inch thermal printer
  • Weighs less than 44 lbs.
       

LTCA-10

Cables

 
       
       

LTCA-10

Technical Specifications

 
       
TYPE Load tap changer analyzer
PHYSICAL SPECIFICATIONS 21”W x 17”H x 9” D (53 cm x 43 cm x 24 cm); Weight: 33 lbs (15.4 kg)
OPERATING VOLTAGE 100 – 240 Vac, 50/60 Hz
RESISTANCE READING RANGE 1 micro-ohm – 500 ohms
ACCURACY 1 – 19,999 micro-ohms: ±0.5% reading, ±1 count;
20 – 999 milli-ohms: ±1% reading, ±1 count;
1 – 500 ohms: ±1.5% reading, ±1 count
RESISTANCE CHANNELS Three static resistance reading channels, One dynamic resistance channel
TEST VOLTAGE 60 Vdc max
TEST CURRENTS 1 ampere, 5 amperes, 10 amperes
AC CURRENT INPUT Clamp-on current sensor, 1 – 20 Amperes
DISPLAY Back-lit LCD Screen (64 x 128 dot graphic ); viewable in bright sunlight and low-light levels
PRINTER 4.5-inch wide thermal printer
EXTERNAL DATA STORAGE One USB Flash drive interface port; stores up to 999 test records on a USB Flash drive (not included)
COMPUTER INTERFACES One RS-232C port, One USB port
INTERNAL TEST RECORD STORAGE Stores up to 128 static resistance test records (48 tests per record) and 11 dynamic resistance test records
LOAD TAP CHANGER CONTACT 240 Vac, 1A
SAFETY Designed to meet UL 61010A-1 and CAN/CSA C22.2 No. 1010.1-92 standards
ENVIRONMENT Operating: -10˚C to 50˚ C (15˚F to +122˚ F); Storage: -30˚ C to 70˚ C (-22˚F to +158˚ F)
CABLES One 50-foot current cable set, Three 50-foot resistance cable sets, One ground cable, One USB cable, One RS-232C cable, One LTC cable, power cord, cable bag
OPTIONS Transportation Case
WARRANTY One year on parts and labor
Specifications are valid at nominal voltage and ambient temperature of +25˚C (+77˚F).
Last updated on February 13, 2009
       

Field Pictures

   
       
LTCA Testing at Eskom, South Africa
LTCA Testing at Power Tech, South Africa
Tri-Phase and LTCA Testing at Rotex Engineering, South Africa
LTCA-40 at BSES Substation in New Delhi, India
DMOM-600 and LTCA-10 at Inducor Ingenieria SA, Argentina