Fluke 1625Earth/Ground Manual do Utilizador descarregar pdf (Página 71)

Stakeless Earth/Ground Resistance Testing

Care and Maintenance

Appendix A

Stakeless Earth/Ground Resistance

Testing

Introduction

Stakeless testing provides the ground tester with the unique capability to meas-

ure individual ground resistances in multi-grounded systems using two clamp-

on current transformers.

The use of ground stakes is not necessary.

Before this method was available, users were required to disconnect an indi-

vidual ground path to be tested from other grounds to eliminate the influence

of parallel ground paths.

This was time consuming at the minimum and in many cases dangerous.

Once disconnected, the standard 3-pole/terminal ground testing method was

used which requires auxiliary earth stakes. In addition to consuming additional

time, finding suitable locations for the ground stakes can be difficult and in

some cases, impossible. The "stakeless" method of ground resistance testing

eliminates these problems and ideally complements the ground testers' stan-

dard testing methods.

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Fluke 1625Earth/Ground Manual do Utilizador Página 71