EN
GDOT-3B Fully Automatic Insulating Oil Dielectric Strength Tester
GDOT-3B Digital Intelligent Fully Automatic Insulating Oil Dielectric Strength Tester with 100kV Adjustable Output, 3-Cup Integrated Structure, Microprocessor Control, Multi-Standard Test Programs, for Power Transformer Insulating Oil Insulation Performance Evaluation.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDOT-3B is a professional-grade, high-precision 100kV fully automatic insulating oil dielectric strength testerexclusively designed for insulation performance evaluation of transformer oil, switch oil, capacitor oil and other insulating oils in power systems and petrochemical industries. It fully complies with GB/T 507-2002, DL/T 846.7-2016 and IEC 60156:1995 standards, adopting an innovative 3-cup integrated structure that enables simultaneous testing of three different samples, greatly improving test efficiency.
The instrument features an advanced microprocessor control system that ensures fully automatic operation, completing the entire test process including voltage rise, stirring, standing, breakdown detection, voltage drop, average calculation and report printing without manual intervention. Its high-precision high-voltage sampling technology delivers 0.1kV voltage resolution and ±2% measurement accuracy, with a breakdown response time of less than 1ms, ensuring accurate and reliable test results.
Specifications
| Parameter | Specification |
|---|---|
| System Parameters | |
| Compliance Standard | GB/T 507-2002, DL/T 846.7-2016, IEC 60156:1995, ASTM D877-20 |
| Test Principle | Power frequency dielectric strength test (breakdown voltage method) |
| Test Cups | 3 independent test cups (2.5mm electrode gap) |
| Operation Mode | Fully automatic one-click test / Manual test |
| Display | 5-inch 800×480 color touch screen |
| Data Storage | 1000 groups test results |
| Data Export | USB 2.0, RS232 |
| Printer | High-speed thermal printer, 58mm paper width |
| Electrical Parameters | |
| Output Voltage Range | 0 ~ 100kV AC (50Hz) continuous adjustable |
| Voltage Resolution | 0.1kV |
| Measurement Accuracy | ±2% of reading |
| Waveform Distortion Rate | ≤3% |
| Breakdown Response Time | ≤1ms |
| Boost Rate | 0.5kV/s ~ 5kV/s adjustable (standard 2kV/s) |
| Maximum Output Current | 10mA |
| Transformer Capacity | 2.0kVA |
| Control Parameters | |
| Stirring Time | 0 ~ 99s adjustable |
| Standing Time | 0 ~ 999s adjustable |
| Test Times | 1 ~ 10 times adjustable (standard 6 times) |
| Boost Interval | 0 ~ 999s adjustable |
| Standard Programs | GB/T 507, IEC 60156, ASTM D877 |
| Custom Programs | Yes (user-defined parameters) |
| Safety Protection | |
| Over-voltage Protection | Yes (105kV automatic power off) |
| Over-current Protection | Yes (12mA automatic power off) |
| Door Interlock Protection | Yes (door open → high voltage cut off) |
| Automatic Discharge | Yes (after test completion) |
| Emergency Stop | Yes |
| Power Supply | |
| Input Power | AC 220V±10%, 50Hz±1Hz |
| Power Consumption | ≤200W (average), ≤2000W (peak) |
| Physical Parameters | |
| Dimensions | 550×400×350mm (L×W×H) |
| Weight | ~22kg (including all components) |
| Housing | Cold-rolled steel with electrostatic spraying |
| Protection Grade | IP40 |
| Operating Temperature | 0℃ ~ +45℃ |
| Storage Temperature | -20℃ ~ +60℃ |
| Humidity | ≤85% RH (non-condensing) |
| Altitude | ≤1500m (customizable for higher altitudes) |
Applications
Core Test Objects
- Power industry oils: Transformer oil, switch oil, capacitor oil, cable oil, turbine oil
- Oil-filled equipment: Power transformers, instrument transformers, capacitors, circuit breakers, reactors
Typical Usage Scenarios
- Power companies: Substation preventive maintenance, insulating oil regular testing, insulation performance assessment
- Transformer manufacturers: Factory quality control, type tests, after-sales service
- Oil treatment companies: Insulating oil regeneration quality inspection, vacuum oil filtration process control
- Third-party testing institutions: Oil quality testing, performance assessment, quality arbitration
- Industrial enterprises: Internal power equipment oil testing and maintenance
Advantages
Compliance with Latest International Standards
Fully meets GB/T 507-2002 Chinese national standard, DL/T 846.7-2016 industry standard and IEC 60156 international standard → test results are recognized worldwide
Industry-Leading 3-Cup Simultaneous Test
Can test three samples simultaneously, improving test efficiency by 300% → saves time and labor costs for high-volume testing
High-Precision Measurement & Fast Response
0.1kV voltage resolution, ±2% measurement accuracy, ≤1ms breakdown response time → ensures accurate and reliable test results
Built-In Multi-Standard Test Programs
Pre-installed multiple international standard procedures, supports custom parameter settings → meets different test requirements and standards
Comprehensive Safety Protection System
Multiple safety protections including door interlock and automatic discharge → ensures operator safety during high-voltage testing
FAQ
Q: What is the principle of insulating oil dielectric strength testing?
A: The principle is based on measuring the maximum voltage that an insulating oil sample can withstand before electrical breakdown. A certain volume of oil sample is placed in a standard test cup with two spherical electrodes separated by a 2.5mm gap. A power frequency AC voltage is applied across the electrodes and increased at a uniform rate until the oil breaks down. The breakdown voltage is recorded, and the test is repeated multiple times. The average value of the breakdown voltages is taken as the dielectric strength of the oil sample.
Q: What is the advantage of 3-cup design compared to single-cup testers?
A:
- Efficiency: Can test three samples simultaneously, improving test efficiency by 300%
- Accuracy: Reduces cross-contamination between samples as each sample uses a dedicated cup
- Convenience: Eliminates the need for frequent cleaning and preparation of the test cup between samples
- Reliability: Allows parallel testing of the same sample to verify result repeatability
Q: How long does a typical test take?
A: A complete test for one sample including 6 breakdown tests, stirring and standing takes approximately 15~20 minutes. For three samples tested simultaneously, the total test time is the same as for one sample, greatly improving work efficiency.
Q: What safety measures are in place to protect operators?
A: GDOT-3B is equipped with a comprehensive safety protection system:
- Door interlock: Automatically cuts off high-voltage output when the test chamber door is opened
- Automatic discharge: Automatically discharges residual voltage after test completion
- Multiple electrical protections: Over-voltage, over-current, over-load and short-circuit protection
- Emergency stop button: One-button emergency stop for any abnormal situation
- Fully enclosed high-voltage chamber: Prevents accidental contact with high-voltage parts
