Transformer Turn Ratio & Phase Group Meter
Summary:
Automatic Transformer Ratio & Phase group meter, BBC-II is based on microprocessor, designed to measure the ratio of single-phase transformer, tri-phase transformer, tri-phase transformer with on-load tap-changer or off-line tap-changer, potential transformer, and so on. It automatically measure windings polarity and phase group. BBC-II can detect and measure ratio of any transformer type, also including interconnected star connection. BBC-II generates its own 3-phase transformer test output voltage from the single-phase AC power input. 3-phase test voltages allow to test single phase and tri-phase potential transformer, distribution transformer, and power transformer, while the magnetic circuit is same as it works, thus the measure results are precise.
The BBC-II outputs an excitation test voltage to the transformer’s primary windings, and the induced secondary voltage is samples and the transformer turns-ratio is calculated. The BBC-II can measure turns-ratios from 1.0 to 9999.9. The transformer turns-ratio, and phase-group readings are displayed on the large back-lit LCD.
The BBC-II can be used as a stand-alone unit or can be computer-controlled. It can be operated locally using its keypads. Information is displayed on a back-lit LCD screen (240 x 128 dot graphic) that is viewable in both bright sunlight and low-light levels. Test records can be transferred to and from a PC via the its built-in RS-232C communication interfaces.
backlight, Operator control inputs are entered via 6-key keypad, English menu
Technical specification
Ratio measurement range: 1.0000~9999.9
Ratio measurement accuracy: 0.1%
Phase group measurement: 1~12
Excitation voltage for ratio measurement: AC180V
Excitation current for ratio measurement: 0.25A (MAX)
Exciting voltage for phase group: AC8V, 3-phases
Power supply: AC 220V15%, 50Hz
Ambient temperature: 0C--50C
Ambient humidity: <90%
Dimensions: 375mm 280mm 230mm
Weight: 7kg
