Load Tap Changer Analyzer QLTCA-10
The QLTCA-10 is Amperis’ transformer winding resistance meter and load tap changer contact analyzer. The QLTCA-10 is designed to accurately measure the winding resistance of highly inductive power transformers. The unit’s triple resistance-reading input channels can measure three winding resistances simultaneously. Two-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 or voltage regulator contact during operation.
One resistance input channel is dedicated to this feature. The QLTCA-10 provides stable resistance readings of very large transformers by utilizing a 60 Vdc power supply capable of outputting at test current up to 10 Amperes.
General Specifications
- Transformer Load Tap Changer Control
- Resistance Reading Features
- USB Flash Drive and Computer Interface
- AC Motor Current Monitoring
- Built-in Safety Features
- User Interface
- Dynamic Resistance Test Features
- Built-in Thermal Printer
- Internal Test Record Storage
QLTCA-10 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; |
|
Test current |
1 ampere, 5 amperes, 10 amperes |
|
Test voltage |
60 Vdc max |
|
Resistance channels |
Three static resistance reading channels, One dynamic resistance channel |
|
Ac current input |
Clamp-on current sensor, 1 – 20 Amperes |
|
Display |
Back-lit LCD Screen (128 x 64 pixels); viewable in bright sunlight and low-light levels |
|
Printer |
Built-in 4.5-inch wide thermal printer |
|
Internal data storage |
Stores up to 128 static resistance test records (48 tests per record) and 11 dynamic resistance test records |
|
External data storage |
One USB Flash drive interface port; stores up to 999 test records on a USB Flash drive (not included) |
|
Computer interface |
One RS-232C port, one USB port |
|
Load tap changer contact |
Designed to meet IEC 61010 (1995), UL 61010-a, and CAS-C22.2 standards |
|
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) |
|
Humidity |
90% RH @ 40°C (104°F) non-condensing |
|
Altitude |
2,000 m (6,562 ft) to full safety specifications |
|
Cables |
One 50-foot current cable set, three 50-foot resistance cable sets, ground cable, USB cable, RS-232C cable, LTC cable, power cord, cable bag |
|
Optional accessories |
Transportation case |
|
Warranty |
1 year on parts and labor |
NOTE: the above specifications are valid at nominal voltage and ambient temperature of +25°C (+77°F). Specifications are subject to change without notice
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