Automatic Insulation Oil Dielectric Strength Tester

Automatic Insulation Oil Dielectric Strength Tester

The HM801 Insulating Oil Dielectric Strength Tester is a specialised device for rapidly determining the breakdown voltage of transformer insulating oil. Breakdown voltage serves as a fundamental indicator of an insulating oil's ability to withstand electric field strength, directly reflecting its insulating performance. The HM801 is an efficient and safe automated tester, serving as the primary safeguard for the insulation integrity of high-voltage electrical equipment such as power transformers. Through rapid and objective testing, it provides critical data for assessing the quality of insulating oil and informing equipment maintenance decisions.
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Description
Technical Parameters

Product Overview & Application Scenarios

 

Product Overview

The HM801 Insulating Oil Dielectric Strength Tester is a specialised device for rapidly determining the breakdown voltage of transformer insulating oil. Breakdown voltage serves as a fundamental indicator of an insulating oil's ability to withstand electric field strength, directly reflecting its insulating performance. The HM801 is an efficient and safe automated tester, serving as the primary safeguard for the insulation integrity of high-voltage electrical equipment such as power transformers. Through rapid and objective testing, it provides critical data for assessing the quality of insulating oil and informing equipment maintenance decisions.

 

Application Scenarios

1. New oil acceptance (quality control): Newly procured transformer insulating oil.

2. In-service oil monitoring (safety inspection): Insulating oil within transformers and instrument transformers during substation operation.

3. Post-maintenance verification (effectiveness assessment): Equipment oil following filtration or replacement procedures.

 

Key Features & Advantages

 

Product Features

1. With a microprocessor, automatically fulfill the withstand voltage test for oil circulation with a range of 0~80KV (including boosting, maintaining, mixing, standing, calculation, printing and other operations).

2. Display by large-screen LCD and prompt by Chinese menu.

3. Simple operation. The machine will automatically complete the withstand voltage test on one cup of sample oil after simple setting by the operator. Breakdown voltage value of 1 to 6 times and recurrent times will be automatically saved. After the test, the thermal printer will print each breakdown voltage value and average value.

4. Power-down preservation. It can save 100 tested results and displaying current ambient temperature and humidity.

5. Adopt a single-chip microcomputer to boost the voltage at an even speed. The voltage is accurate at 50HZ, ensuring the whole process easy for control.

6. Equipped with over-voltage, over-current and limit protections to ensure the safety of operators.

7. With the function of displaying the measured temperature and system clock.

8. Communicate with computer with a standard RS232 interface.

 

Product Advantages

1. Minimal operation, objective results

Fully automated one-touch testing eliminates subjective errors from manual pressure increases and endpoint judgements, delivering more reliable outcomes.

2. Rapid testing, exceptional efficiency

Fully automated process delivers precise results within 2-3 minutes, significantly faster than manual operation.

3. Safety-focused design, safeguarding personnel

Features high-voltage door interlock protection (power cut-off upon door opening) and overcurrent/overvoltage safeguards to ensure operational safety.

4. Precise Data, Standard-Compliant

High-precision sensors and stable voltage-increase control ensure excellent data repeatability and authoritative results.

5. Low-Maintenance, Cost-Effective

Simple construction requires only routine oil cup cleaning, resulting in minimal maintenance costs and high reliability.

 

 

Operating Conditions

 

Applicable temperature: 0℃~45℃

Applicable humidity: <75%RH

Environmental conditions:
Temperature: Room temperature (10-30 ° C).
Location: A clean experimental platform without wind, strong electromagnetic interference, or severe vibration.
Power and Safety
Power supply: A stable 220V AC power supply must be reliably grounded.
Safety: The operating area should be dry and tidy, and the instrument grounding wire should be firmly connected.
Sample preparation
Oil sample: must be transparent and free of suspended particles. If there are impurities, filter them with filter paper.
Oil cup: must be thoroughly cleaned and dried. The electrode surface should be smooth, without burn marks, and the spacing calibration should be accurate.
Rest: After injecting the oil sample into the oil cup, it needs to be left to stand for a period of time (such as 10-15 minutes) to eliminate bubbles.

 

Additional Information

 

Alternative NamesInsulating Oil Breakdown Voltage Tester;Insulating Oil Withstand Voltage Tester;Insulating Oil Dielectric Strength Tester;Insulating Oil Dielectric Strength Tester;IEC 60156 / ASTM D877 Test Set;Transformer Oil Withstand Voltage Tester;Insulating Oil Tester;insulation oil breakdown tester;dielectric strength test set for transformer oil;oil dielectric strength measurement equipment;ASTM D877/D1816 oil testers;portable insulation oil tester;HV dielectric strength test kit;transformer oil quality analyzer.

 

Our Service

We pledge to treat every client with integrity and equality, regardless of contract size or whether they are domestic or international, new or existing customers, providing professional consultation and advice. Goldhome provides professional installation, commissioning and training for users' workers, ensures that users can get familiar with operation methods and put machines into use as soon as possible.

Maintenance & FAQs

 

Q: What is the HM801 used for?

A: It tests the dielectric strength of insulation oil (e.g., transformer oil, capacitor oil) to check if the oil can resist high voltage without breakdown-critical for ensuring the safety of oil-filled electrical equipment (transformers, reactors).

Q: What oil types and voltage ranges does it support?

A:

Suitable for most industrial insulation oils (mineral oil, synthetic oil).​

Test voltage range: 0–80kV (meets global standards like IEC 60156, GB/T 507).

Q: How long does a single test take?

A:About 1–3 minutes per sample (depends on oil condition). The tester auto-runs the process: oil sample heating (if needed), voltage boosting, breakdown detection, and result display..

Q: Can it work in harsh on-site environments?

A:

Yes. It resists:​

Temperature: 5–40°C​

Humidity: ≤85% (no condensation)​

Electromagnetic interference (e.g., near substations)

Q: Why is my test result unstable?

A:

Check 3 common issues:​

Oil sample: Not filtered (contains impurities) or not dried (has moisture).​

Test cup: Dirty (clean with alcohol) or not grounded properly.​

Voltage supply: Unstable (use a voltage stabilizer).

Q: Does it store test data?

A: Yes. It saves up to 1,000 test records (including date, voltage, oil temperature) and can export data via USB to a computer for reports.

 

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Technical Specifications

 

Parameter Name

Parameter Value

Output voltage 0~80kV
Voltage distortion rate <3%
Voltage raising speed: 0.5~5 KV/S (adjustable)
Standing time: 15min (adjustable)
Boosting interval: 5 min (adjustable)
Boosting frequency 1~9 time(s) (optional)

Dimensions

465×385×425
Booster capacity 1.5KVA
Supply voltage

AC 220V ± 10%

Measuring accuracy ±3%
Power

200 W