TUNKIA's Testing and Calibration Solutions Across the Power Industry

The reliable operation of power systems depends on accurate measurement, testing, and verification across a wide range of electrical equipment. Beyond electrical energy metering, applications such as transformer testing, primary equipment verification, power measurement, digital substation testing, and relay protection require specialized testing technologies and calibration solutions.

With expertise in electrical signal generation, precision measurement, signal analysis, and automated testing, TUNKIA provides technical solutions for diverse testing and calibration requirements across the power industry.

1. Transformer Testing and Calibration

Transformers are essential components of power transmission and distribution systems. Their performance and operating conditions need to be evaluated through various tests and measurements, while the instruments used for these tests also require regular verification and calibration.

Key testing and calibration applications include:

• Winding Temperature Indicator Testing: Simulating transformer winding temperature signals and verifying the measurement performance of winding temperature indicators.

• Transformer Loss and Capacity Measurement: Testing and calibrating instruments used to measure transformer no-load loss, load loss, and rated capacity.

• Short-Circuit Impedance Measurement: Verifying instruments used to measure transformer short-circuit impedance and related electrical parameters.

These applications involve precision current and voltage signal generation, electrical parameter measurement, and instrument calibration

2. Primary Equipment Testing

Primary electrical equipment, including switches, circuit breakers, and surge arresters, plays a critical role in power system operation. Testing instruments used to assess their electrical characteristics must also maintain reliable measurement performance.

Key testing applications include:

• Surge Arrester Tester Calibration: Verifying the measurement accuracy of instruments used to test zinc oxide surge arresters, including total current, resistive current, capacitive current, reference voltage, and active power measurements.

• Circuit Resistance Measurement: Measuring the circuit and contact resistance of switches, circuit breakers, and copper or aluminum busbars.

• Measurement Performance Verification: Evaluating the accuracy and performance of electrical testing instruments used in primary equipment testing.

These applications require accurate low-resistance measurement, electrical signal simulation, and calibration technologies.

3. Power Measurement and Field Verification

Accurate electrical measurement is essential for monitoring power system operation and verifying the performance of measurement devices. In addition to laboratory calibration, on-site verification under actual operating conditions is important for ensuring measurement reliability.

Key applications include:

• AC Sampling Device Verification: Verifying the measurement performance of AC sampling devices used in power systems.

• Transducer Testing: Evaluating the measurement accuracy and performance of electrical transducers.

• On-Site Electrical Measurement: Performing field verification of measurement devices under actual operating conditions.

• Harmonic Analysis and Signal Evaluation: Analyzing harmonic components, waveforms, and phase relationships to assess electrical signal characteristics.

These applications involve precision AC/DC measurement, three-phase power measurement, low-level DC signal measurement, harmonic analysis, and waveform analysis.

4. Digital Substation and Automation Testing

With the development of digital substations and intelligent power systems, the acquisition, transmission, and processing of electrical signals increasingly rely on integrated digital measurement and automation technologies.

Testing these systems requires the simulation and verification of both analog and digital signals, as well as the evaluation of communication functions.

Key testing applications include:

• Merging Unit Testing: Simulating multiple analog and digital signals to verify the functional performance of merging units.

• Metering Merging Unit Testing: Evaluating the measurement and signal processing performance of merging units used in metering applications.

• Analog and Digital Signal Simulation: Generating multiple signal channels to support functional testing of secondary equipment.

• Power Automation System Testing: Verifying the measurement, output, and operational functions of integrated power automation systems.

• Communication Testing: Evaluating communication functions and interfaces of electrical measurement and automation devices.

These applications rely on multi-channel signal generation, analog and digital signal simulation, synchronized measurement, and automated testing technologies.

5. Relay Protection Testing and Verification

Relay protection systems are essential for detecting faults and maintaining the safe and stable operation of power systems. The performance of relay protection test equipment must be regularly verified to ensure the accuracy and reliability of protection testing.

Key verification applications include:

• Relay Protection Tester Verification: Evaluating the technical performance and measurement accuracy of relay protection testers.

• Electrical Signal Generation: Providing multiple voltage and current channels for testing different functions of relay protection test equipment.

• Low-Level Signal Measurement: Verifying the output performance of low-level signal channels.

• Digital Input/Output Testing: Evaluating the performance of digital input and output interfaces.

• Time Measurement: Verifying timing functions and measurement accuracy.

These applications require multi-channel electrical signal generation, precision measurement, digital input/output testing, and time measurement capabilities.

Supporting Diverse Testing Needs Across the Power Industry

From transformer testing and primary equipment measurement to power system automation, digital substation testing, and relay protection verification, the power industry involves a broad range of testing and calibration requirements.

Through continuous development in electrical signal generation, precision measurement, signal analysis, and automated testing, TUNKIA supports diverse applications across the power industry, helping customers improve testing efficiency, measurement reliability, and the accuracy of electrical instrument calibration.