HZJD-2Z - TRANSFORMER OIL TAN DELTA TESTER

IEC-ASTM COMPLIANT DIELECTRIC LOSS AND RESISTIVITY MEASUREMENT DEVICE FOR TRANSFORMER OIL

In high-voltage power systems, the quality of insulating oil directly affects the safety and lifespan of transformers.

The HZJD-2Z Transformer Oil Tan Delta Tester is a specialized device used to measure:

• Dielectric loss coefficient (Tan Delta)

• Relative Permittivity

• DC resistivity of insulating oil

The device is designed according to GB/T5654-2007 standards, conforming to IEC 60247 and ASTM D924, meeting the testing requirements in power plants, substations, and testing centers.

PRACTICAL APPLICATIONS

• Transformer oil quality testing

• Insulation oil aging assessment

• Oil quality control before commissioning

• Electrical and energy industry laboratories

• High-voltage power system maintenance and repair units

HIGHLIGHTS OF HZJD-2Z

1. Integrated Structure – Fully Automatic Operation

The device is integrated into a single system:

• 3-electrode test chamber

• PID temperature controller

• Dielectric loss bridge

• AC test power supply

• High-voltage DC power supply

• SF6 internal reference capacitor

• High resistance meter

The entire measurement process is fully automated – the operator only needs to follow the instructions on the LCD screen.

2. GB/T5654-2007 Standard 3-Electrode Test Chamber

• Electrode spacing: 2mm

• Reduces parasitic capacitance and leakage

• Features an automatic oil drain system using a solenoid valve

• Allows sample rinsing without removing the cell

Increases accuracy and saves operating time.

3. Medium Frequency + PID Induction Heating

• Non-contact heating

• Uniform and rapid heating

• Temperature control error: ±0.5℃

• Temperature setting range: 0 – 125℃

Includes a temperature limit relay that automatically shuts off when exceeding 120℃ – ensuring safety.

4. High Accuracy – Long-Term Stability

• SF6 internal pressure-sensitive capacitors – independent of ambient temperature and humidity

• AC power supply using AC-DC-AC technology, eliminating the influence of grid voltage fluctuations

• Stable operation even when using a generator

5. Complete Safety Protection System

Automatic shutdown in case of:

• Overvoltage

• Overcurrent

• High-voltage short circuit

• Temperature sensor failure

Warnings are displayed directly on the screen.

MAIN TECHNICAL SPECIFICATIONS

Tan Delta

• Measurement range: 0.00001 – 100

• Accuracy: ±(1% of measured value + 0.0001)

Dielectric constant

• Measurement range: 1 – 30

• Accuracy: ±1%

Resistivity

• Measurement range: 2.5MΩ·m – 20TΩ·m

• Resolution: ±10%

Test voltage

• AC: 0 – 2000V

• DC: 0 – 500V

Power supply

• AC 220V ±22V (50/60Hz)

Dimensions – Weight

• 500 × 360 × 420 mm

• 22 kg

BENEFITS OF IMPLEMENTATION IN ENTERPRISES

✔ Inspection Accurate transformer oil quality control

✔ Reduces the risk of power system failures

✔ Meets international inspection standards

✔ Increases the reliability of substation operation

✔ Saves inspection time

LEDANCO – POWER INDUSTRY TESTING EQUIPMENT SOLUTIONS

Le Dan Trading and Service Co., Ltd. (LEDANCO) provides:

• In-depth technical consulting

• Operation guidance & technology transfer

• Maintenance and calibration support

• Supply of genuine equipment