UT278A+ Clamp Earth Ground Testers

UT278A+ Clamp Earth Ground Tester

The UT278A+ Clamp Earth Ground Tester is a professional instrument designed to measure grounding resistance and leakage current quickly and safely without disconnecting the grounding system. Electricians, engineers, and maintenance technicians rely on this tester when inspecting grounding systems in electrical installations. Because the device uses clamp-on measurement technology, technicians can measure ground resistance directly from the earth conductor while the electrical system continues operating.

Moreover, the UT278A+ Clamp Earth Ground Tester simplifies grounding system testing by eliminating the need for auxiliary ground rods. Technicians simply clamp the tester around the grounding conductor and obtain accurate measurements instantly. As a result, the device reduces testing time and increases efficiency in industrial and commercial electrical environments.

In addition, the tester measures earth resistance and leakage current simultaneously. This capability helps technicians detect grounding faults and identify potential safety risks in electrical installations. Proper grounding protects equipment and personnel from electrical hazards. Therefore, accurate ground resistance measurement plays a crucial role in electrical safety inspections.

Furthermore, the UT278A+ Clamp Earth Ground Tester delivers stable and reliable measurements even in complex grounding networks. Technicians frequently use it in power distribution systems, lightning protection systems, telecommunication infrastructure, and renewable energy installations. Because the clamp design allows testing without disconnecting ground conductors, technicians can perform inspections faster and more safely.

Another advantage of this tester is its large clamp jaw opening, which allows technicians to measure thick grounding conductors commonly used in industrial electrical systems. In addition, the device includes a large backlit LCD display that provides clear readings even in low-light environments such as electrical rooms or outdoor installations.

The tester also features practical functions such as data hold, alarm indication, memory storage, and automatic range selection. These functions allow technicians to record and analyze measurement results more efficiently during field inspections.

Because of its compact design and rugged construction, technicians can easily carry the UT278A+ Clamp Earth Ground Tester for on-site grounding inspections. Electrical maintenance teams widely use this instrument for routine grounding verification and safety testing.

Key Features

• Clamp-On Ground Resistance Measurement
  Measures earth resistance without disconnecting the grounding conductor.

• Leakage Current Measurement
  Detects leakage current flowing through grounding systems.

• High Accuracy Measurement
  Provides stable results in complex grounding networks.

• Large Clamp Jaw Design
  Allows testing of thick grounding cables.

• Backlit LCD Display
  Ensures clear readings in low-light environments.

• Data Hold and Memory Storage
  Allows technicians to record measurement values easily.

• Automatic Range Selection
  Improves measurement speed and accuracy.

• Portable and Durable Construction
  Suitable for industrial field inspections.

Applications

The UT278A+ Clamp Earth Ground Tester is widely used in many electrical safety applications, including:

• Grounding system inspection

• Lightning protection system testing

• Power distribution grounding measurement

• Telecommunications tower grounding tests

• Electrical safety inspections

• Industrial plant grounding maintenance

• Renewable energy grounding systems

Technical Specifications (Datasheet)

• Model: UNI-T UT278A+

• Product Type: Clamp Earth Ground Tester

• Earth Resistance Measurement Range: 0.01Ω – 1200Ω

• Leakage Current Measurement: 0.00mA – 30A

• Clamp Jaw Diameter: ≈32mm

• Display: LCD with backlight

• Measurement Method: Clamp-on ground loop measurement

• Data Hold: Supported

• Memory Storage: Supported

• Safety Rating: CAT III 300V

• Power Supply: Battery powered