manual transformer error tester

The transformer calibration set is an important equipment for the error verification of current transformers. This device consists of a voltage regulator, a transformer load box, a standard transformer, and a transformer calibration instrument, serving as the basis for the error verification work of transformers.

The following equipment must be provided according to actual requirements: voltage regulators, load boxes for current transformers, standard current transformers, and current transformer calibration instruments.

The Transformer Calibration Device is a next-generation automatic testing platform for voltage regulators developed by our company. Utilizing cutting-edge virtual instrument design principles, users can perform fully automated testing of current transformers and voltage transformers through computer interfaces using mouse and keyboard operations. The system enables comprehensive analysis, data processing, and database management of test results, with customizable printing of test reports and certification documents tailored to user requirements. This equipment serves as an ideal solution for transformer calibration in power systems and related industries. Compared to domestic calibration platforms, its key features include: 1. True virtual instrument architecture with fully automated control – users simply input parameters such as transformer type, measurement range, accuracy class, capacity, and power factor via computer interfaces to complete the entire workflow from measurement to certificate generation.
2. Powered by a variable frequency source, it achieves precise, rapid, and stable positioning, completely resolving the 1% positioning challenge for S-class current transformers.
3. The voltage and current load box automatically switches gear positions through programmed control, eliminating the need for manual calculations or gear shifts to prevent incorrect gear selection.
4. Equipped with comprehensive alarm and overcurrent protection functions.
5. The included transformer calibration instrument features a built-in touch screen, greatly facilitating debugging, verification, and field operations.

Key Technical Specifications of the Device
1.1 Main Technical Specifications for Programmable Source Calibration Bench:
1.1.1 To achieve stable and rapid 0-250V output voltage, the calibration bench must utilize a fully automated programmable source equipped with integrated display and protection features.
Power input for the transformer: Voltage: AC 220V±10%;
Frequency: 50Hz±0.5 Hz.
1.1.2 Operating environment: Temperature: -10℃ to 40℃; Humidity: <80% (at 25℃).
1.1.3 Output power: 10kVA.
1.1.4 Accuracy of percentage meter: 1%, Display range: 1% to 199%.
1.1.5 Secondary measurement range: Voltage: 100V,100V/; Current: 1.5 A

1.1.6Automatic stability point:

Voltage (%): 20,50,80,100,120

Current (%): 1.5, 20,100,120

1.1.7Overcurrent protection setting: Automatic

1.1.8 Minimum adjustment: <0.04%

1.1.9 Weight: <120 kg

1.2 Transformer calibration instrument parameters

1.2.1 Measurement range:

Same Phase component (%): 0.0001–200.0 Resolution: 0.0001

Orthogonal component (°): 0.001–999.9 Resolution: 0.001

Impedance (Ω): 0.0001–10.0 Resolution: 0.0001

Conductance (S·s): 0.0001–10.0 Resolution: 0.0001

1.2.2 Fundamental error:

Same Phase component: (X = (X × 2% + Y × 2%)(D)

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

"X" and "Y" – Instrument display values

"D" – Instrument quantification error 0.5 class

1.2.3 Operating range:

Current: (1%–149% In) (In = 5A) (5%–149% In) (In = 1A)

Voltage: (5%–149% Un) (Un = 100V) 100V/) (5%–199%) Un (Un=100V/)

1.2.4 Operating load: Current: To For Tx<0.12 (cosφ=1 Voltage: a For x<0.25VA (100V)

1.2.5 Polarization error indication When the rated operating current (voltage) deviation exceeds 5% and the error exceeds 180%, polarity indication must be provided.
1.2.6 Transformer ratio error indication shall be triggered when the error exceeds 5% of the rated working current (voltage), with the error range between 30% and 180%.
1.2.7 Insulation and Voltage Withstand Test Specifications: Terminal Tx is connected to terminal (), while terminals K and D are isolated from terminal (). The power socket withstands 1.5kV voltage for 1 minute.

1.3 Automatic Current-Voltage Transformer Load Box Parameters: Both current and voltage ranges can be automatically switched.

1.3.1 Rated Capacity:

Voltage: 1.25VA～158.75VA (COSΦ=0.8, COSΦ=1.0);

Current: 2.5VA～60VA (COSΦ=0.8, 2.5VA～5VA COSΦ=1.0).

1.3.2 Measurement Range:

Voltage: 20%～120%; Current: 1%～120%.

1.3.3 Secondary Voltage: 100V,110V,100/√3V,110V/√3V;

Secondary Current: 5A,1A.

1.3.4 Power Factor: 0.8.

1.3.5 Accuracy: ±3%.

5.4 High-Current Precision Standard Current Transformer:

The standard current transformer equipped with a current booster serves dual functions as a measurement device and reference standard transformer. Technical specifications:

Primary current: 5A～5000A;

Secondary current: 5A,1A;

Frequency: 50Hz;

Accuracy class: Class 0.05S--0.002S;

Booster voltage: 250V;

Booster capacity: 20kVA;

Rated load: 5VA. 1VA

lower limit load: 2.5VA

Power factor: 1.0

Rated voltage: 500V

5.4:Standard voltage transformer

Key features:

The voltage transformer is a high-voltage, high-accuracy device capable of calibration for transformers with accuracy below 0.1 class. It can handle a secondary load of 0.25VA at 100V, fully meeting the calibration requirements for voltage transformers.
Technical specifications: Rated voltage ratio 10kV/100V--220kV/100V,

rated secondary capacity 0-0.20VA,

power factor (Cosφ) = 1.0,

accuracy class 0.05--0.002,

rated frequency 50Hz.

The company's products are divided into four major series: indoor and on-site calibration equipment for transformers, power preventive test equipment, power online monitoring systems, and electrical measurement equipment. Since its establishment, the company has adhered to the business philosophy of "Technology Creates Value, Integrity Forges Brand", implemented a modern enterprise management system, and strictly complied with the ISO 9000 quality system standards. We will repay users' trust and support with high-quality products and star-level services.