AEMC 6474-6472 GroundFlex & Pacific Test Equipment HPRC kit PTE-045

Description

Exclusive to Pacific Test Equipment

AEMC’s GroundFlex® Field Kit includes the GroundFlex® Adapter Model 6474 and Ground Resistance Tester Model 6472. This is the ONLY system on the market capable of testing ground resistance of individual power transmission tower legs, as well as total resistance without disconnecting the overhead ground wire – this alone is a huge time and money saver, not to mention a major safety improvement. Key features include testing both ground resistance of tower legs (individually and total) and overhead ground wires. This system tests leakage current through the tower legs and tests at frequencies up to 5kHz to profile impedance, which is important to characterize for lightning strikes.

Standard 6472 earth tester with 6474 GroundFlex option for tower and structure testing
Measures earth resistance of towers and structures with up to 4 legs with independant earth connected
Supplied with 4 x 5 metre Rogowski coils accommodating structures up to 1.5m diameter
Supplied with Pacific Test 100/50m kit in two heavy duty HPRC resin cases

The 6472 distinguishes itself from other portable earth testers in that it has a test current of up to 250mA improving its ability to make accurate and repeatable measurements in poor soil conditions as frequently encountered in Australia.

The AEMC 6472 Earth Tester is several earth testers in one. It allows the user to perform all necessary earth measurements comprising:

Earth Resistance of an isolated electrode
Earth Resistance of a connected electrode without disconnection by the Selective method
Earth Resistance of a connected electrode without disconnection by the Stakeless method
Soil Resistivity directly in Ohm-m by either the Wenner or Schlumberger methods
Earth Bond Resistance (milli-ohmmeter)
External AC and DC voltage measurement

Ground measurement on towers with ground cable

High-voltage lines are usually equipped with a ground cable to allow lightning to discharge to ground via the tower. As all the towers are all connected to this conductor, all the tower’s resistances are in parallel. This means it is impossible to measure tower resistance using traditional 3-Point methods unless the ground cable is disconnected, which is a dangerous and time-consuming operation.