Fully Automatic Transformer Calibration Bench

Product Introduction

The instrument transformer calibration system is a new-generation device developed by our company to meet the demands of rapid and precise modern calibration. It consists of an instrument transformer calibrator, voltage/current load box, electronic source controller, and computer. Operators can use the transformer error calibration management software on the computer to set key parameters such as the type of transformer under test, measurement range, accuracy class, secondary load, power factor, and the position of the transformer being tested. Through RS485 transmission and control, the entire test process takes only 30 to 60 seconds, achieving truly rapid calibration and significantly improving work efficiency.

Product Parameter (specification)

3.1 Environmental Conditions for Device Operation	Temperature;5°C to 40°C Relative Humidity;<80% (at 25°C) Altitude;<2500m Power Frequency;50Hz ±0.5Hz Power Voltage;220V ±5V
3.2 Technical Parameters Related to the Device
3.2.1 Operating Range	Current;Primary Current;5~5000A Secondary Current;5A, 1A Class;0.02 (S)
Voltage	Primary Voltage;35kV, 35kV()
Secondary Voltage	100V, 100/
Class	0.02
3.2.2 Measurement Range
ClassIn-phase Component (%)	0.0001~200.0 Resolution;0.0001
Orthogonal Component (minutes)	0.001~999.9 Resolution;0.001
Impedance ()	0.0001~60.0 Resolution;0.0001
Admittance (ms)	0.0001~60.0 Resolution;0.0001
3.2.3 Basic Error
In-phase component	X = (X × 2% + Y × 2%) (2 digits)
Orthogonal component	Y = (X × 2% + Y × 2%) (5 digits) "X", "Y" - Instrument display values "Digits" - Instrument quantization error
Percentage meter	Class 1.5
Output current, output voltage	Class 2.0
3.2.4 Polarity error indication	When the error exceeds 180% at 5% or more of the rated operating current (voltage), a polarity error indication is provided.
3.2.5 Turns ratio error indication
When the error exceeds 30% but is less than 180% at 5% or more of the rated operating current (voltage), a turns ratio error indication is provided.
3.2.6 Verification Basis
JJG313-2010 Verification Regulations for Current Transformers for Measurement JJG314-2010 Verification Regulations for Voltage Transformers for Measurement

Product feature and application

1. This device features three testing modes: online automatic, standalone automatic, and standalone manual.

2. Equipped with an RS485 communication port, it delivers stable signals with strong anti-interference capabilities.

3. The device employs the latest integrated programmable electronic voltage regulation, delivering rapid voltage increases with high accuracy. This overcomes the drawbacks of traditional electromechanical voltage regulators, such as high noise levels and mechanical wear.

4. The integrated programmable electronic source synchronously displays output working voltage, current, frequency, and power factor, and is equipped with a reset button.

5. Voltage and current load box settings are switched via programmable control, eliminating the need for manual gear changes.

6. Equipped with LED indicators for intuitive identification of tested transformer types (CT/PT).

7. Features comprehensive protection functions including overcurrent/overvoltage protection, polarity error detection, and signal fault indication.

8. The device boasts an aesthetically pleasing exterior design, user-friendly functionality, and automated display features, significantly enhancing the working environment.

Prodection details

1. Power Systems:

Regular calibration of measuring instruments at power plants and substations; batch verification by grid metering centers.

2. Manufacturing:

Factory acceptance testing by measuring instrument manufacturers; performance testing during R&D phases.

3. Third-Party Testing:

Compliance verification of submitted measuring instruments by metrology testing institutions.

Company Qualifications

FAQ

1)What are the core components of the MEHT-W fully automatic instrument transformer calibration bench?

Answer: The core components include the instrument transformer calibrator, voltage/current transformer load box, electronic source controller, and computer (equipped with instrument transformer calibration management software). These components work together to achieve precise and rapid calibration of instrument transformers.

2)What test modes does the MEHT-W fully automatic instrument transformer calibration bench support?

Answer: It supports three test modes: online automatic mode, standalone automatic mode, and standalone manual mode. Users can flexibly select modes based on actual scenarios (e.g., batch verification, field testing).

3)What requirements must be followed when transporting the MEHT-W Fully Automatic Instrument Transformer Calibration Bench?

Answer: Prior to transport, the unit must be packed in a wooden crate with foam padding for shock absorption. During transit, it must not be placed in open-air cargo compartments or inverted. Measures to prevent rain, dust, and mechanical damage must be implemented. For routine movement, anti-vibration and anti-impact protection must be applied.

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