Voltage Transformer Calibrator

The voltage transformer calibrator is a field test instrument designed by our company in order to reduce the workload of field electromagnetic voltage transformer verification. The instrument has the ability to verify the actual error of the voltage transformer under high voltage working conditions under low voltage conditions. Can cover 10kV/100V, 10kV/√3

/100V/√3, 35kV/100V, 35kV/√3/100V/, 110kV/100V, 110kV/√3/100V/√3, Measurement of power electromagnetic voltage transformer. In the design of the instrument, some new ideas were introduced and some new technologies were adopted. For example: common platform technology, voltage simulation load, internal high-accuracy voltage transformer and self-boosting power supply, etc. It makes users feel more convenient, fast and efficient when using the instrument.

1) The instrument has a new dual-winding PT transformer test function, and there is no need for an external load box during the test.

2) The instrument has a self-boosting voltage transformer standard with multiple conversion ratios, and the accuracy level reaches 0.02. It can accurately verify the error of the power voltage transformer under the voltage of 1200V and 2400V.

3) The instrument uses simulation load technology when measuring electromagnetic voltage transformers. This technology can calculate the load error of the voltage transformer under the rated load and lower limit load. Therefore, the voltage can not be used when the electromagnetic voltage transformer is checked. Load box.

4) The accuracy level of the internal transformer calibrator part of the instrument is level 2.

5) The instrument has the function of automatic sampling of the procedure points, which makes it very convenient and quick for users to carry out the procedure measurement.

6) The instrument has a power source output, automatic boost, and superior protection performance.

7) This instrument adopts the universal platform technology recently developed by our company. In the universal platform, users can easily check some useful information such as: previous measurement data, wiring diagrams of various measurement objects, etc. Directly provide the measured value, rounded value, error curve, etc. of each point. Automatically judge the measurement results. The intelligence of the instrument has been further improved.

8) The instrument can measure temperature and humidity, so that users can know the working environment on site at any time.

Environmental conditions

1) Environmental conditions

Temperature: (5~40)C Relative humidity: <80% (25C)

Altitude above sea level: <2500m Power frequency: 50Hz 0.5Hz

The combined error of the instrument: 0.05%

Accuracy grade range of the measured voltage transformer: 0.2, 0.5, 1

Type of voltage transformer under test: electromagnetic voltage transformer

Internal standard voltage transformer part:

a. Range of transformation ratio:

10kV/100V, 10kV//100V/

35kV/100V, 35kV//100V/

110kV/100V, 110kV //100V/

b. Accuracy level: 0.02%

c. Working voltage: 0V~2400V

d. Output capacity: 50VA

Internal transformer calibrator part

a. Traditional measurement range:

In-phase component (%): 0.0001~3.0 Resolution: 0.0001

Orthogonal component (minutes): 0.001~99.9 Resolution: 0.001

b. Measuring range of low school height method:

In-phase component (%): 0.0001~200.0 Resolution: 0.0001

Orthogonal component (minutes): 0.001~999.9 Resolution: 0.001

Admittance (ms): 0.0001~59.9 Resolution: 0.0001

c. Basic error:

In-phase component: X=(X×2%+Y×2% 2 words)

Orthogonal component: Y=(X×2%+Y×2% 5 words)

"X", "Y"-the display value of the instrument

"5 words"-the quantization error of the instrument

Dial indicator: Level 1

d. Scope of work:

Voltage: (5%~149%) Un (Un=100V, 150V, 100V/)

e. Work load:

Voltage: a to x<0.25VA (100V)

f. Polarity indication

Use the low school height method to measure the first step. The working voltage is above 2V. During the test, short the tested voltage transformer a to the tester x, and the tested voltage transformer x short the tester a. At this time, the error is 200%. With polarity indication;

Note: During the test, if there is still no polarity error indication when the voltage exceeds 10V, it means that the instrument itself is faulty. Please stop the test to avoid damage to the instrument.

Internal voltage load box part:

Capacity range: 0.0VA~500VA

Power factor: 0.1~1.0

Accuracy level: 3.0%

Operating voltage range: 0.5V~40.0V

Withstａnd voltage test and description:

Terminal A, X and () terminal are connected.

K, D, a and x terminals are all blocked with () terminal.

Instrument power consumption: 100VA

Instrument output power: 500VA