Product Overview
The Voltage Transformer Field Tester is a field testing instrument designed by Goldhome to reduce the workload associated with on-site calibration of electromagnetic voltage transformers. The instrument is capable of determining the actual error of a voltage transformer under high-voltage operating conditions while performing calibration at low voltage. It supports the measurement of electromagnetic voltage transformers with the following voltage ratios: 10kV/100V, 10kV//100V, 35kV/100V, 35kV//100V, 110kV/100V, and 110kV//100V. The instrument incorporates innovative design concepts and new technologies, such as platform technology, voltage simulation loads, an internal high-accuracy voltage transformer, and a self-boosting power supply. These features make the instrument more convenient, faster, and more efficient for users.
Products Features
-
1) This instrument features a new testing function for dual-winding PT transformers, eliminating the need for an external load bank during testing.
2) The instrument incorporates a built-in multi-ratio self-boosting voltage transformer standard with an accuracy class of 0.02, enabling accurate verification of power voltage transformer errors at voltages of 1200 V and 2400 V.
3) When measuring electromagnetic voltage transformers, the instrument employs simulated load technology. This technology calculates the load error of the voltage transformer under both rated and minimum load conditions, thereby eliminating the need for a voltage load box during calibration of electromagnetic voltage transformers.
4) The accuracy class of the instrument's internal voltage transformer calibration unit is Class 2.
5) The instrument features automatic sampling of calibration points, making it convenient and efficient for users to perform calibration measurements.
6) The instrument incorporates an internal power source output with automatic voltage ramping and superior protection capabilities.
7) This instrument utilizes our company's newly developed universal platform technology. Within this platform, users can conveniently access useful information such as historical measurement data and wiring diagrams for various measurement objects. It directly provides measurement values, rounded values, and error curves for each point, and automatically evaluates measurement results, further enhancing the instrument's level of intelligence.
8) This instrument can measure temperature and humidity, allowing users to monitor the on-site working environment at any time.
Products parameters
1) Environmental Conditions
Temperature: (5–40) °C Relative Humidity: <80% (at 25 °C)
Altitude: <2500 m Power Frequency: 50 Hz ±0.5 Hz
2) Total Instrument Error: 0.05%
3) Accuracy Class Range of the Voltage Transformer Under Test: 0.2, 0.5, 1
4) Type of Voltage Transformer Under Test: Electromagnetic Voltage Transformer
5) Internal Standard Voltage Transformer Section:
a. Turns Ratio Range:
10 kV/100 V, 10 kV//100 V/
35 kV/100 V, 35 kV//100 V/
110 kV/100 V, 110kV //100V/
b. Accuracy class: 0.02%
c. Operating voltage: 0V~2400V
d. Output capacity: 50VA
6) Internal transformer calibrator section
a. Conventional measurement range:
In-phase component (%): 0.0001~3.0 Resolution: 0.0001
Quadrature component (min): 0.001–99.9 Resolution: 0.001
b. Low-to-High Calibration Measurement Range:
In-phase component (%): 0.0001–200.0 Resolution: 0.0001
Quadrature component (min): 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 digits)
Quadrature component: Y = (X × 2% + Y × 2% × 5 digits)
"X" and "Y" - Instrument display values
"5 digits" - Instrument quantization error
Percentage meter: Class 1
d. Operating range:
Voltage: (5%–149%) Un (Un = 100 V, 150 V, 100 V/ )
e. Operating Load:
Voltage: a to x < 0.25VA (100V)
f. Polarity Indication
First, perform the measurement using the "low-to-high" calibration method with an operating voltage of 2V or higher. During the test, short-circuit the test voltage transformer a to the tester x, and short-circuit the test voltage transformer x to the tester a. At this point, the error should be 200%, and a polarity indication should appear;
Note: During testing, if no polarity error indication occurs even when the voltage exceeds 10V, this indicates a fault in the instrument itself. Please stop the test to avoid damaging the instrument.
7) Internal Voltage Load Box Section:
Capacity Range: 0.0VA~500VA
Power Factor: 0.1~1.0
Accuracy Class: 3.0%
Operating voltage range: 0.5V–40.0V
8) Withstand voltage test and instructions:
Terminals A and X are connected to the ( ) terminal.
Terminals K, D, a, and x are not connected to the ( ) terminal.
9) Instrument power consumption: 100VA
10) Instrument output power: 500VA
panel Diagram
1-Power outlets and switches 2-Terminal blocks
3-Large LCD display with Chinese characters 4-Keyboard
5-Printer 6-Computer interface port
Hot Tags: voltage transformer field calibrator, China voltage transformer field calibrator manufacturers, factory
