During the production process of semi-finished products and finished products of power transformers, before the newly installed transformers are put into operation and in accordance with the preventive test procedures of the National Electric Power Ministry, it is required that the transformers in operation be regularly tested for the turns ratio or voltage ratio. The traditional variable bridge operation is cumbersome, the reading is not intuitive, and the necessary conversion is performed. The test result is only a phase change ratio. The automatic ratio change tester overcomes the shortcomings of the traditional turn ratio test. The instrument completes the three-phase ratio test at a time, and the test speed is fast and the accuracy is high.
1). The test range is wide, up to 5000.
2).Test speed is fast, 7 seconds to complete the three-phase test
3) Y, △,Z-connected transformer test.
4). The clock and date display even power is off, data storage.
5). High and low voltage reverse connection protection function.
6). Transformer short circuit, inter-turn short circuit protection.
7). Thermal printer output function, fast, silent.
8). Equipped with RS232, USB interface, easy to connect to the computer to export data.
9). Small size and light weight.
10)Powerful function, which can be used for single-phase measurement and automatic testing of three-phase winding.
1). Range: 0.9 ~ 5000
2). Accuracy: 0.1% (<500)
0.2% 2 words (500~2000)
0.5% word (2000 or more)
3). Resolution: minimum 0.0001
4). Output voltage: 160V, 10V automatic shift
5). Working power: AC220V±10% 50HZ
6). Working temperature: -20 °C ~ 40 °C
7). Relative humidity: ≤ 85%, no condensation
XHBB128B Technical data
Range: 0.9~10000
Accuracy: ±0.1%+2wrods (0.9~500)
±0.2%+2words (501-2000)
±0.5%+2words (2001-10000)
Resolution: Minimum is 0.0001
Working power supply: AC220V±10% 50Hz
Applied temperature: -10ºC~40ºC
Contrary humidity: ≤85%, no dew.
Size: 400mmX320mmX150mm
XHBB128B Turn ratio tester Function features
(1) Instrument internal adopt precision three-phase inverter measurement power supply instead of the single-phase mains supply as measuring voltage, which eliminate the harmonic effect of the main voltage , more accuracy. If the working power supply is generator and its without any effect.
(2)Adopt 3 phase output voltage,3 phase input voltage and 3 phase measuring at the same time, can very easily automatic identification of transformer connection group 0 -11.
(3)Suitable for various of transformers, with the function of testing the Z type transformer.
(4)Using precision three-phase inverter power supply, has the high and low voltage reverse connect protection and transformer inter-turns short circuit protection, tap-changer protection and output short circuit protection functions, increase the stability of instrument.
(5)After inputting the rated parameters, can automatic measure transformer turns ratio, error and tap-changer points, especially for asymmetric tap-changer points, also can accurately test the position of the transformer tap-changer, can measure up to 99 points of tap-changer
(6)With 65K True Color Module LCD display, each operation step with English prompt, and the operation can be completed just by prompt and no need of manual.
(7)With Micro-printer ,USB and RS232 interface.
(8)With sealed water-proof and shock-proof sturdy hand-case, be suitable for field testing.
XHBB128C Technical data
Range: 0.9~10000
Accuracy: ±0.1%+2words (0.9~500)
±0.2%+2words (501-2000)
±0.5%+2words (2001-10000)
Resolution: Minimum is 0.0001
Working power supply: AC220V±10% 50Hz
Output voltage:Automatically adjust according to load
Applied temperature: -10ºC~40ºC
Contrary humidity: ≤85%, no dew.
Size: Length 360mm × width 280mm × height 160mm
XHBB128C Turn ratio tester Function features
The interface applies the intelligent type touch way, operation is simple and convenient.
The circuit applies the new generation of the complete digital scheme, which can ensure stability of the instrument for long term.
Testing speed is quick, transformation ratio testing of three phases can be compeleted only through one wiring, taking only 10 seconds.
Carry out testing of CT, PT, CVT and Z shape connected transformer.
Applicable to transformation ratio measurement of the power distribution tansformer to the 1000KV transformer, the current transformer (CT), the voltage transformer (PT) and the Z shape connected transformer.
Several short circuit measurement ways are set up in internal area, which faciliate fault judgment.
Non-power off clock and date display, the instrument can save 50 groups of data, data during powering-off will not be lost.
Large screen colourful liquid crystal display, data are clear and readable, print by the thermal printer. The RS485 communication interface and U disk memory interface.
The instrument has high voltage and low voltage reverse connection protection function, which has short circuit, turn to turn short circuit protection functions of the transformer and mis-connected 380V protection function of the power supply.
Optional external AC220V and internal battery AC / DC power supply, it is not necessary to connect the external AC power supply and carry out testing.
It can measure the angle between phases and automatically identify the transformer wiring group 0-11
All will be made in English for export products.
Audited Supplier 
){kind=link}
){kind=link}