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Gaodian Electric Power Co., Ltd

Power Testing Instruments

BY2571 Digital Ground Resistance Tester

Digital earth resistance meter using DC/AC conversion instead of hand-cranked generation. Combines 3-terminal and 4-terminal measurement in one instrument with a low-frequency constant current source, avoiding the effort and instability of a hand-cranked generator.

BY2571 Digital Ground Resistance Tester
Standards
IEC 61557-5 · GB/T 18216
Applications
Grounding system test · Substation earthing · Lightning protection check

Overview

Digital earth resistance meter using DC/AC conversion instead of hand-cranked generation. Combines 3-terminal and 4-terminal measurement in one instrument with a low-frequency constant current source, avoiding the effort and instability of a hand-cranked generator.

Applicable Standards

  • IEC 61557-5
  • GB/T 18216

Application Scenarios

Grounding system testSubstation earthingLightning protection check

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Frequently Asked Questions

What is the difference between 3-terminal and 4-terminal measurement?
The 3-terminal method is the standard fall-of-potential earth resistance measurement. The 4-terminal method adds separate current and potential leads to cancel out lead resistance, which matters when measuring very low earth resistance values.
Does this tester need hand-cranking?
No. It uses a DC/AC conversion circuit and a low-frequency constant current source instead of a hand-cranked generator, which removes the physical effort and the reading instability of manual generation.
What is it used for?
Substation earthing grid verification, grounding system testing, and lightning protection system checks, per IEC 61557-5 and GB/T 18216.

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