The CITAS 2771 is a digital current instrument transformer (CT) measuring bridge. It incorporates more than 70 years of knowledge in this field and state-of-the-art technologies to exceed industry requirements.
The CITAS 2771 measures ratio error, phase error, and current excitation according to the latest IEC and ANSI standards.
Test objects and nominal transformers with large ratio differences can be measured with full accuracy, reducing the number of reconnections during testing.
The CITAS 2771 specified accuracy is independent of excitation or environmental conditions (temperature or humidity) and guarantees highly accurate results under any circumstance.
Datasheet:
CITAS 2771 Current Instrument Transformer Features
High accuracy results independent of temperature or excitation current
Extremely large k-factor (difference between nominal transformer and test object ratios)
Computer controlled with Windows-based Haefely CaMS user interface
Automatic error limits according to IEC and ANSI/IEEE standards
Fast stabilization time
Controls Haefely 3691 electronic current burden
Optically decoupled from computer by fiber optic data connection
Scope function – waveshapes of the measured signals shown in real-time
Datalogger – readings can be collected and represented graphically to see deviations
Compact, reliable, and EMC-hardened design, IP50
Technical Data
Accuracy Limits
|
Input Current In & Ix | Ratio Error | Phase Error | Amplitude Error | |
|---|---|---|---|---|
| Reference Condition | 0.01 A – 10A | ± 100 ppm | ± 0.1 min | ± 0.1% |
| Full Operating Range | 0.001 A – 16 A | ± 0.1% | ± 1 min | ± 0.1% |
| Input Impedance | Less than 35 mΩ |
Conditions
| Reference Conditions | Full Operating Condition | |
|---|---|---|
| Temperature | 10 °C – + 40 °C | 10 °C – + 50 °C |
| Ratio of Secondary IN / IX | 0.1 – 10 | 0.01 – 100 |
| Fundamental Frequency | 45 – 65 Hz | |
