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UT279 Transformer Grounding Current Tester

The UT279 Transformer Grounding Current Tester is a device designed for on-site online tests of grounding and leakage currents in transformer iron cores.


It features a current clamp, monitoring software, and a communication cable. This tester helps identify potential faults in transformers, ensuring safe operation and facilitating routine maintenance. It is versatile and suitable for various sectors including electric power, communications, meteorology, railways, oil fields, architecture, metrology, academic institutions, and industrial enterprises.

This product is currently out of stock and unavailable.


  • Leakage current measurement
  • Large Jaw size: inner dia. Up to 80mm
  • 3.5-inch color
  • Online none-contact measurement
  • Strong anti-interference
  • Alarm function
  • Data storage: 200 set
  • PC software analysis
AC Current (ACA)0.00mA~100A ±(0.5%+5dgt)
AC Voltage AC 0~600V ±(0.5%+5dgt)
Frequency 10HZ~1000HZ ±2Hz
Function 1, Transformer core ground current test;
2, AC leakage current, current online test
Test method Clamp CT
Jaw size 1, Max measureable dis.: φ80mm wire;
2, Flat steel ground wire: 96 x 4mm
Screen 3.5 inch color touch LCD (320 ×240);
Size: 71 x 53mm
Sampling rate 1 time/second
Data storage 200 set
Automatic shut-down
USB interface Data transmission via USB cable
Alarm Settings 10mA~99.99A
Alarm indication Audiable & Visual alarm
Line voltage <AC 600V
Over range display The “OL” symbol display
Low battery indication
Lead length Current clamp lead length: 2m
Working environment -10℃~40℃; below 80%rh
Storage environment -10℃~60℃; below 70%rh
Dielectric strength AC 2kV/rms (between screw and case)
Pollution degree 2
Suitable for safety regulations CAT III 600V; IEC1010-1; IEC1010-2-032; IEC61326
General Characteristics
Power supply DC 9V alkaline dry battery LR6 1.5V×6
Product Color Red+Black
Product weight Host: 450g (including battery);
Current clamp: 780g
Product dimension Host size: 198 × 100 × 45mm;
Current Clamp Size: 194 × 145 × 40mm
Accessories Meter (including current clamp) 1pcs, USB cable 1pcs, tester box 1pcs, AAA battery 6pcs, user manual 1pcs
SPQ 2pcs
Package dimension 430x280x260mm

Applications of UT279 Transformer Grounding Current Tester

applications of UT279-1
applications of UT279-2
applications of UT279-3
applications of UT279-4
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