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Earth Resistance Tester

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HUAYI: Professional Earth Resistance 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.

 

 
 
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 condition

-15℃∽40℃

RH＜80%

Principle of anti-interference

Frequency conversion method

 

Power supply

AC 220V±10%

Allowable generator

Measured output current

1A～5A adjustable

Measuring output voltage

0V～420V

Test power frequency

5,50,55,60,65HZ

Single frequency

45/55,55/65 47.5/52.5HZ

Automatic dual-frequency

Rated output power

2100W

Resolution

Impedance ground

0.0001

Impedance angle

0.0001°

Accuracy

Impedance ground

±(1%*reading+0.002)

Impedance angle

±(1%*reading+0.02°)

Resistance measuring range

0.001Ω～5Ｋ

Size

370(L)×295(W)×358(H)

Memory

100 group support U disk

Weight

Host 22 Kg

Earthing sticks 7 Kg

 

Construction of Earth Resistance Testers
1

Current Source

Generates a controlled current to be injected into the ground.

2

Voltage Measurement Circuit

Measures the potential difference between the ground electrodes.

3

Display Unit

Shows the ground resistance value in ohms or other relevant units.

4

Controls and Settings

Allow users to configure test parameters and select measurement modes.

 

Material of Earth Resistance Tester

Outer Casing Material

Made of durable ABS plastic or reinforced polycarbonate to provide insulation, impact resistance, and weather protection.

Electrodes

Constructed from stainless steel or copper-clad steel for high conductivity and corrosion resistance.

Circuit Components

Includes precision resistors, capacitors, and microprocessors for accurate resistance measurement and signal processing.

 

Ground Grid Earth Resistance Tester

 

Advantages of Earth Resistance Tester

Accurate and Reliable Test Results: The tester provides accurate and reliable test results, effectively assessing the quality and safety performance of grounding systems.

 

Simple Operation of the Instrument: The operation of the testing instrument is straightforward, user-friendly, and does not require specialized skills.

 

Compact Size: The instrument has a small size, making it convenient to carry and use.

 

Affordable Price: The price of the instrument is relatively low, making it suitable for enterprises and organizations of various scales.

 

 
Application of Earth Resistance Tester
 
01/

Household Appliances Testing: A earth resistance tester ensures that the ground resistance is within acceptable limits, confirming that the appliance is safe to use.

02/

Lighting and Electronic Equipment Testing: A earth resistance tester verifies that these devices have a secure, low-resistance grounding system, reducing the risk of electrical faults or fire.

03/

Industrial Equipment Testing: A earth resistance tester plays a vital role in ensuring the safety of this equipment, especially for high-power equipment that requires a robust grounding system to handle potential fault currents.

04/

Medical Equipment Testing: A earth resistance tester helps confirm that these devices are properly grounded, reducing the risk of electrical hazards in medical environments.

 

 

Difference Between Earth Resistance Testers and Meggers

The earth resistance tester is primarily used to measure the resistance of earthing systems. It assesses how well the ground connection operates, which is vital for protecting electrical systems and preventing electrical shock hazards. In contrast, a megger, short for megohmmeter, is designed to measure insulation resistance. It is an invaluable tool for ensuring that electrical installations are safe and reliable, preventing potential breakdowns or failures.

Three Phase 200A Contact Resistance Tester

 

Usage Requirements
 

Safety Operations

Earth resistance testing involves high voltage and current, making strict adherence to relevant safety regulations and operating procedures essential.

Compliance with Safety Regulations

Before use, inspect the electrical connections of the tester, such as the power source and plugs, ensuring there are no issues such as burrs or fractures.

Appropriate Selection of Testing Conditions

Reasonable parameter selection enhances the accuracy and reliability of the test.

Prevention of High Voltage Breakdown

During testing, insulation between the tester's electrodes and the device to be tested is necessary to avoid high-voltage breakdown incidents.

Maintenance Attention

Regular maintenance and timely replacement of parts, along with circuit inspections, are necessary to extend the tester's lifespan.

Environmental Considerations

During usage, consider the environmental factors such as humidity, temperature, and atmospheric pollution, as these can impact the accuracy of test results.

 

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 earth resistance tester?

A: An earth resistance tester is a crucial instrument used by engineers and technicians to measure soil resistance to electrical discharges. This measurement evaluates the efficiency of grounding systems, ensuring they function properly and provide safety for equipment and people.

Q: How does an earth resistance tester work?

A: Grounding is essential in electrical installations to prevent power surges or overloads from damaging equipment. When analyzing a grounding system, the impedance values of electrodes are assessed according to electrical codes and engineering standards.
The earth resistance tester measures this impedance: the lower the impedance, the better the grounding performance. Ideally, grounding resistance should be below 10 Ohms, while values above 30 Ohms may pose risks.

Q: How to choose a suitable earth resistance tester?

A: When selecting an earth resistance tester, consider the following factors to make an informed decision:
Accuracy and resolution: Choose a tester with an accuracy and resolution suitable for your application.
Test method compatibility: Ensure that the tester supports the desired test method, such as the three-point, clamp-on, or stakeless method, as each method has its own advantages and limitations.
Measurement range: Select a tester with a measurement range that covers the expected earth ground resistance values for the systems being tested.
Portability and ease of use: Consider the tester’s size, weight, and user interface when selecting a model.
Additional features: Some testers offer features such as data logging, GPS integration, and report generation, which can be beneficial for tracking test results and improving documentation.

Q: Is the earth resistance tester AC or DC?

A: The earth resistance tester works only on DC (Direct Current) The construction of the earth resistance tester is similar to the Megger with small modifications adding additional features. It consists of a dc generator, a rotating current reverser, a rectifier, and a PMMC instrument to measure resistance.

Q: Why are E1 and P1 short in earth resistance tester?

A: Terminals P1 and E1 are shorted to form a common point which is connected to the earth electrode under test. The other two terminals E2 and P2 are connected to the auxiliary electrode A and B respectively. The value of earth resistance is indicated directly on the scale when the test button is pressed.

Q: What is the 3-point method in earth resistance testing?

A: The 3-point (or fall-of-potential) method uses three electrodes:
One connected to the earth electrode under test,
One current electrode, and
One potential electrode.
The tester measures the potential drop and calculates resistance.

Q: How do temperature and soil moisture affect readings?

A: High soil moisture and lower temperature generally reduce resistance, while dry or sandy soil increases resistance. Measurements should ideally be taken in moderate moisture conditions for accuracy.

Q: Can an earth resistance tester be used for soil resistivity testing?

A: Yes. Using the Wenner four-point method, the tester can measure soil resistivity, which helps in designing grounding systems.

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

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