Portable Transformer Capacity and Loss Characteristic Tester,
At rated frequency and reference temperature, the equivalent series impedance Z=R+jX(Ω) between the terminals of one winding of a pair of windings. When determining this value, the terminals of the other winding are short-circuited, and other windings (if any) are open-circuited. For three-phase transformers, it is expressed as the impedance per phase (equivalent star connection).
Note 1: For transformers with tapping windings, the short-circuit impedance refers to the specified tap. Unless otherwise specified, it refers to the main tap.
Note 2: This parameter can be expressed as a dimensionless relative value, i.e., as a fraction z of the reference impedance Zref of the same winding in the pair. Expressed as a percentage:
Functional Features
l Can measure the capacity of various distribution transformers and power transformers on-site, without the need for an additional power supply, making testing more convenient and faster
l Combined with external power supply, voltage regulation, boost and current boost equipment, can measure characteristic data such as no-load current, no-load loss, impedance voltage, and load loss of various transformers
l All test results are automatically corrected accordingly. You only need to input relevant parameters (such as temperature, no-load correction coefficient, etc.), and the instrument will automatically perform various corrections such as waveform distortion correction, temperature correction, non-rated voltage correction, non-rated current correction, etc., making the test results more accurate
l In transformer characteristic measurement, the maximum voltage range can reach 750V, and the maximum current range can reach 100A, with built-in protection circuits. Measurement accuracy is ensured without switching gears, and there is no need to worry about burning the instrument due to incorrect gear selection
l During transformer characteristic testing, the voltage and current ranges can be extended very flexibly and conveniently, simply by connecting external voltage transformers and current transformers, greatly widening the instrument's testing range
l Large screen, high-brightness liquid crystal display, full Chinese menu and operation prompts, achieving a very friendly human-machine interface; wide temperature, adjustable brightness LCD screen, adaptable to different ambient temperatures
l Based on the no-load and load losses in the test results, the performance level of three-phase oil-immersed distribution transformers and power transformers can be automatically estimated for on-site reference by staff (this instrument currently can only estimate the performance level code for three-phase oil-immersed distribution and power transformers. For other types of transformers, the inferred results are invalid)
Technical Parameters
1. Built-in power supply output range
Voltage: 0～10V
Current: 0～10A
2. Characteristic test power input range
Voltage: 0～750V
Current: 0～100A
3. Test accuracy
Portable Transformer Capacity and Loss Characteristic Tester, voltage, current: ±0.2%
Power: ±0.5% (CosΦ>0.1), ±1.0% (0.02Φ<0.1)
4. Operating temperature
-20℃～+60℃
5. Charger power requirements
Mains AC160V～265V
6. Insulation resistance
(1) Insulation resistance between capacity test, voltage, current input points and the housing ≥100MΩ
(2) The charging power input withstands power frequency 2KV (effective value) against the housing, test duration 1 minute
7. Volume: 32cm×25cm×12cm
8. Weight: 2.5kg
