Product Introduction
Wuhan UHV Power Technology Co.,Ltd., is a professional manufacturer and supplier of high-voltage power testing equipment in China.The UHV-905 Automatic CT/PT Transformer Calibrator is an intelligent testing device specifically designed for error calibration, impedance, and admittance testing of current transformers (CT) and voltage transformers (PT). The instrument employs advanced digital signal processing (DSP) technology combined with a unique test circuit design, effectively overcoming the stability issues found in traditional resistance-capacitance phase-shifting circuits, and providing a stable, accurate, and efficient testing solution for transformer metering performance verification.
This equipment is suitable for power metering, substations, power supply enterprises, metrology testing institutions, and transformer manufacturing companies. It can be used for factory inspection, on-site calibration, periodic verification, and performance evaluation of CTs and PTs.
Product functions
1. Automatic CT/PT error testing
The UHV-905 is specifically designed for error testing of current transformers (CT) and voltage transformers (PT). It can measure key parameters such as ratio error and phase error, providing accurate data for transformer metering performance evaluation and calibration.
2. Impedance and admittance testing
The instrument integrates impedance and admittance testing functions, allowing measurement of relevant transformer parameters. This integration meets the comprehensive performance testing requirements of transformers.
3. Automatic polarity and ratio error judgment
The instrument can automatically determine polarity errors and ratio errors based on test results, providing corresponding prompts to help test personnel quickly identify wiring or performance anomalies in transformers.
4. Automatic sampling and auto-ranging
The device supports automatic sampling and auto-ranging, automatically selecting the appropriate measurement range based on the actual test signal. This reduces manual intervention, improves test efficiency, and ensures consistency in the testing process.
5. DSP digital signal processing
Adopts advanced DSP digital signal processing technology combined with a unique test circuit design, effectively improving the stability issues found in traditional resistance-capacitance phase-shifting circuits, and enhancing the stability and reliability of the testing process.
6. Host computer and virtual instrument functions
Supports host computer software and virtual instrument functions, enabling test operation and data processing via computer, facilitating the management and application of test results.
Product Characteristics
1、Intelligent transformer calibrator adopts 320 240 lattice liquid crystal, with large visual range and long life backlight, convenient to use
2、Chinese operation interface, beautiful interface
3、The percentage difference Angle difference is displayed in large font, which is convenient for users to observe
4、The intelligent transformer calibrator produced by our company fully meets the requirements of jjg314-1993 and jjg314-1994, and it can be sampled automatically
5、Automatically judge polarity error, change ratio error
6、The upper computer software has the open function of virtual instrument
7、Completely solve the s-level measurement problem
8、Automatic range switching
9、The perfect combination of advanced and unique circuit and DSP technology can completely remove the problem of the circuit instability
10、power dissipation：＜15VA(No micro printer)；＜25VA(microprinter)
11、Harmonic suppression ratio：＞40db
12、boundary dimension(Band dimensions)：260×350×150mm3
13、weight：6kg
technische Parameter
| Betriebsumgebung der Ausrüstung | temperature：5℃～40℃ | relative humidity：<80%(25℃) |
| altitude：<2500m | ||
| mains frequency：50Hz±0.5Hz | mains input：220V±5V | |
| Messbereich | cophase component(%)：0.0001～200.0 | distinguishability：0.0001 |
| orthogonal component(part)：0.001～700.0 | distinguishability：0.001 | |
| impedance(Ω)：0.0001～20.0 | distinguishability：0.0001 | |
| admittance(ms)：0.0001～20.0 | distinguishability：0.0001 | |
| intrinsischer Fehler | Cophase-Komponente | ΔX=±(X×2%＋Y×2%)±Dx(Level 1 is optional) |
| orthogonale Komponente | ΔY=±(X×2%＋Y×2%)±Dy(Level 1 is optional) | |
| "X"、"Y"——Display value of instrument | ||
| "Dx,Dy"——Display value of instrument | ||
| Dx=2，Dy=5 | ||
| Messuhr | HAUSTIERE2 (Stufe 1 ist optional) | |
| Arbeitsbereich | Elektrizität | (1%～149%)In (In =5A) |
| (5%～149%)In (In =1A) | ||
| Stromspannung | (5%～149%)Un (Un =100V，150V，100V/) | |
| (5%～149%)Un (Un =100V/3) | ||
| Arbeitsbelastung | Elektrizität | TO to TX＜0.12Ω cosΦ=1 |
| Stromspannung | a to x＜0.25VA (100V) | |
| Anzeige von Polaritätsfehlern | Wenn der Betriebsstrom (Spannung) mehr als 5 % des Nennstroms (Spannung) erreicht und der Fehler 180 % überschreitet, sollte eine Polaritätsanzeige erfolgen. | |
| Hinweis: Wenn er mehr als 10 % des Nennbetriebsstroms (Spannung) beträgt, gibt es immer noch keine korrekte Polaritätsanzeige, was auf einen Fehler hinweist. Bitte erhöhen Sie den Strom (die Spannung) nicht, um ein Durchbrennen des Instruments zu vermeiden. | ||
| Fehleranzeige bei variablem Übersetzungsverhältnis | Wenn der Betriebsstrom (Spannung) mehr als 5 % des Nennstroms (Spannung) erreicht und der Fehler 30 % überschreitet, aber weniger als 180 % beträgt, sollte die Fehleranzeige des variablen Verhältnisses erfolgen. | |
| Isolations- und Spannungsprüfung und Anweisungen | terminalTX( )Terminal ist gleich | |
| The power socket can withstand the housing1.5kV，1minwithstand voltage | ||
Application Scenarios
1. Substation on-site testing
Used for on-site error, ratio error, phase error, polarity, and ratio testing of CTs and PTs in substations, helping operation and maintenance personnel quickly assess transformer operating condition.
2. Power metering and calibration
Applied in power metering departments and metrology verification institutions for periodic verification, metrological calibration, and performance testing of current transformers and voltage transformers, ensuring metering equipment is accurate and reliable.
3. Transformer manufacturing and factory inspection
Used in CT/PT manufacturing enterprises for production process testing and factory inspection, verifying key performance parameters such as error, ratio, and polarity, improving product quality control levels.
4. Laboratory performance testing
Suitable for power laboratories, testing centers, and research institutions for conducting accuracy, impedance, admittance, and comprehensive performance testing of CTs and PTs, providing test data for product development and performance analysis.
5. Power equipment operation, maintenance, and fault diagnosis
During power equipment maintenance, key parameters of CTs and PTs can be tested to quickly identify issues such as polarity anomalies, ratio anomalies, and excessive errors, providing a basis for equipment fault diagnosis and maintenance.
6. On-site metering equipment calibration
With its portable design, the UHV-905 is suitable for mobile CT/PT calibration work at various power sites, reducing equipment transport and complex operations, and improving on-site testing efficiency.
Frequently Asked Questions
Q: What is the automatic CT/PT transformer calibrator mainly used for testing?
A: The automatic CT/PT transformer calibrator is mainly used for error testing of current transformers (CT) and voltage transformers (PT). It also supports testing of related parameters such as impedance, admittance, polarity, and ratio. It is suitable for transformer production, verification, laboratory testing, and on-site testing.
Q: What key parameters can the automatic CT/PT transformer calibrator test?
A: The device mainly supports testing of parameters such as ratio error, phase error, impedance, and admittance, and can automatically detect polarity errors and ratio errors in transformers.
Q: Can the device automatically detect polarity and ratio errors?
A: Yes. The automatic CT/PT transformer calibrator can automatically detect and indicate polarity errors and ratio errors based on test results, helping personnel quickly identify anomalies.
Q: Does the automatic CT/PT transformer calibrator support testing of high-precision transformers?
A: Yes. The device supports measurement of S-class transformers and features high measurement resolution, meeting the testing requirements of high-precision transformers.
