Oil Tan Delta Tester

HUAYI: Professional Oil Tan Delta Tester Manufacturer

Wuhan HUAYI Electric Power Technology Co.,Ltd. (HUAYI for short) is a professional manufacturer in China, researching and manufacturing electric testing equipment. HUAYI insist developing and marketing independently, and make efforts to improve the products quality, reduce cost, and improve efficiency.

Transformer Oil Tan delta resistivity Tester

Why Choose Us

Rich Experience

The company was established in 2005 and has more than ten years of professional experience. It is one of the earliest manufacturers of high-voltage testers in China.

Professional Technology Support

Specialize in testing and solutions for more than 18 years. Own experienced engineers. Professional on delivery, installation, debugging, and training.

ISO Certification

We have a professional R&D technical team and strict quality control to ensure safety, accuracy and efficiency. Passed ISO9001 certification and obtained relevant patent certificates.

24 hours After-sales

Professional after-sales service, paying attention to customers' feedback about products; Providing solutions within 24 hours, if the customers have any problem; Act quickly and efficiently.

Product Parameter

Working temperature	0℃～40℃
Relative humidity	<75%
Power supply voltage	AC 220V±10%
Power frequency	50Hz/60Hz ±1%
Test range	Capacitance	5pF～200pF
	Relative capacitive	1.000～30.000
	Dielectric loss factor	0.00001～100
	DC resistivity	2.5 MΩm～20 TΩm
Accuracy	Relative capacitive	±(1～10)%read
	Dielectric loss factor	±(5%read±0.0002)
	DC resistivity	±10% reading
Resolution	Capacitance	0.01pF
	Relative capacitive	0.001
	Dielectric loss factor	0.00001
Temperature measurement range	40～120℃
Temperature measurement error	±0.5℃
AC test voltage	200～2200V continuously adjustable, frequency 50Hz
DC test voltage	0～500V continuously adjustable
Power consumption	500W
Size	460mm× 370mm×330mm
Weight	25Kg

Key Functions of an Oil Tan Delta Tester

01/

Diagnostic Tool for Insulation Condition
One of the primary functions of an oil tan delta tester is to assess the condition of the insulating oil in electrical equipment. By measuring the tan delta, the tester can detect early signs of insulation degradation, such as moisture ingress, oxidation, and contamination.

02/

Quality Control of Newly Installed Equipment
An oil tan delta tester can be used to perform initial tests on the oil to verify its dielectric properties. This helps to identify any potential issues with the oil or the equipment during the commissioning phase and ensures that the system operates safely and efficiently from the start.

03/

Monitoring of Equipment Performance
In addition to diagnostic and quality control functions, an oil tan delta tester can also be used for continuous monitoring of equipment performance. By regularly measuring the tan delta of the insulating oil, operators can track changes in the insulation condition over time and detect any trends or anomalies.

04/

Compliance with Industry Standards
Many industries have specific standards and regulations regarding the quality and performance of electrical insulation. An oil tan delta tester helps equipment owners and operators to comply with these standards by providing accurate and reliable measurements of the tan delta.

Material of Oil Tan Delta Tester

Rugged Housing: Impact-resistant aluminum enclosures protect internal circuitry from shocks, vibrations, and rough handling during fieldwork.

Moisture and Dust Resistance: Units with IP54 or higher ratings resist water splashes and dust ingress, allowing safe operation in rainy conditions or dusty substations.

Precision Electrode System: Electrodes are typically constructed from stainless steel or brass with a mirror-polished surface to provide stable contact and reduce measurement error.

Advantages of Oil Tan Delta Tester

Accurate Insulation Assessment

Provides precise measurement of dielectric loss (tan δ), allowing for reliable evaluation of oil insulation quality.

Early Fault Detection

Helps identify moisture, contamination, and aging in transformer oil before serious breakdowns occur.

High Measurement Stability

Advanced circuitry and temperature compensation ensure consistent and repeatable test results.

User-friendly interface

These testers feature a simple, user-friendly interface, allowing operators to easily configure, monitor, and interpret results.

Portable and Reliable Design

Compact, rugged construction makes it suitable for both laboratory and on-site testing conditions.

Application of Oil Tan Delta Tester

Generation Power Industry: Commonly used by power generation plants for routine inspection of insulating oils in transformers, bushings, and switchgear.

Refineries: Applied in refineries, heavy industry, and production plants where insulating oils are used in motors, generators, and high-voltage equipment for ongoing condition monitoring.

Laboratories: Used in laboratories for studying the electrical and chemical behavior of insulating oils under different environmental and electrical stresses.

Usage Requirements

Always follow the manufacturer’s instructions when using these testers.
Make sure that the testers are properly calibrated before using them.
Ensure all connections are secure and tight to avoid testing errors or safety incidents.
Keep a record of the test results so that you can track the condition of the insulation over time.
Store the tester in a dry, temperature-controlled environment away from direct sunlight, chemicals, and electromagnetic interference.

Accessory

Serial Number	Name	Amount
1	Host	One
2	Oil cup	One
3	Test temperature line connector	One
4	Data acquisition line	One
5	High voltage test line for inspection	One
6	Test line for inspection	One
7	Power line	One
8	Measuring cup (50ml)	One
9	Printing paper	One
10	Specification	One
11	Inspection Report	One

How To Cooperate With Us

Inquiry: You can contact us online or sending us an inquiry. Please provide the details of your requirements as clear as possible. So we can send you the offer at the first time.
Phone Number: (+86)-18062012971/whatsapp:+8618064115448
E-mail: sales@sinohipot.com/ tina@sinohipot.com

Custom Plan Development: During the consultation, we’ll evaluate your specific requirements and together, craft a custom quality assurance plan tailored to your needs.

Agreement and Setup: Once you’re satisfied with the plan, we’ll finalize the details and set up everything needed to get started.

Quality Assurance Implementation: Our team will then implement the quality assurance protocols on your selected products or processes.

Delivery: Deliver cargos by sea or by air according to requirement.

Packaging and Delivery

Packing detail:	Packing with wooden cases, provide different solutions of shipping way.
Payment:	We accept many payment term, such as T/T, Western Union, L/C.
Warranty period:	One-year warranty, Installation, and commissioning of specific products.
Delivery time:	Most of our products are in stock and can be delivered upon payment. The delivery time usually does not exceed 15 days.

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Our Certificates

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FAQ

Q: When can I get the price?

A: Usually we quote within 24 hours after we get your inquiry.

Q: What is your minimum order quantity, can you send me samples?

A: Our minimum order quantity is 1 set, and the sample shipping fee needs to be provided by you.

Q: Do you have the products in stock

A: Most Of our tester has stock.You can contact us to make sure

Q: Is there the products tested before shipping?

A: Our products undergo factory testing and are accompanied by reports.

Q: Would you have a discount?

A: Yes we could offer different discount according to your order quantity. We also hold regular promotional activities every year.

Q: Have your products been exported?

A: We have more than 10 years of export experience. Please contact us to confirm if there is a local partner.

Q: What about the transportation?

A: Usually we take door to door express delivery ,cause it's more convenient and fast.

Q: What is an oil tan delta tester and why is it important?

A: An oil tan delta tester measures the dielectric dissipation factor (tan delta) of insulating oil, reflecting its insulation properties and quality. This test identifies oil degradation, moisture, and contaminants, essential for maintaining transformer performance and preventing failures. High tan delta values signal insulation deterioration, alerting manufacturers and maintenance engineers to timely interventions.

Q: How does an oil tan delta tester work?

A: Oil tan delta testers apply an AC voltage to an oil sample and measure the phase difference between the applied voltage and resulting current. The tan delta value represents insulation losses caused by impurities and degradation within the oil. The device calculates this as the ratio of resistive to capacitive current, providing a quantitative measure of oil quality.

Q: Which factors influence the accuracy of oil tan delta testing?

A: The accuracy of tan delta testing depends on:
Oil sample cleanliness and preparation.
Temperature stability during tests.
Proper calibration of the tester.
Electrical noise and environmental conditions.
Test frequency and voltage applied.

Q: Can oil tan delta testers detect early transformer failures?

A: Yes, these testers detect slight increases in dielectric losses caused by moisture or aging oil, indicating insulation weakness before catastrophic failures. Early detection allows for timely maintenance or oil replacement, reducing unplanned outages and repair costs.

Q: Has technology improved oil tan delta testing equipment?

A: Modern oil tan delta testers, like those from Wrindu, include digital interfaces, automated calibration, and data logging. Integration with software analysis tools supports remote monitoring and predictive maintenance, enhancing factory and wholesale operational efficiencies. Innovations also include portable and user-friendly designs suited for on-site diagnostics.

Q: Can an oil tan delta tester be used on other insulating materials?

A: Primarily designed for liquids like transformer oil, but some advanced models test solid insulation components indirectly.

As one of the most professional oil tan delta tester manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy cheap oil tan delta tester made in China here from our factory.