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Ground Audits  
Ground Audits
Electromation Uses State Of The Art Testing Equipment To Perform Reliable Ground Audits For Your Facility.
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Ground Testing |
- Ground Verification of:
- Individual Machines Within a Facility
- Main Grounding Electrode
- Grounding Grid
- Total Effective Ground
- Testing Methods
- Stakeless (Ground Loop Resistance)
- 2-Point (Ground Impedance)
- 3-Point (Fall-of-Potential)
- 3-Point (Selective Testing)
- 4-Point (Soil Resistivity)
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Recommended Tests For A Complete Ground Audit |
- Stakeless Measurement
- First, perform a Stakeless measurement on:
- The individual legs of the tower and
the four corners of the building
(cell sites/towers)
- All grounding connections
(electrical substations)
- The lines running to the remote site
(remote switching)
- The ground stakes of the building
(lightning protection)
- For all applications, this is not a true ground
resistance measurement because of the network
ground. This is mainly a continuity test to verify
that the site is grounded, that we have an electrical
connection, and that the system can pass
current.
- 3-Pole Fall-Of-Potential Measurement
- Second, we measure the resistance of the entire
system via the 3-pole Fall-of-Potential method.
Keep in mind the rules for stake setting. This
measurement should be recorded and measurements
should take place at least twice per year.
This measurement is the resistance value for the
entire site.
- Selective Measurement
- Lastly, we measure the individual grounds with
the Selective test. This will verify the integrity
of the individual grounds, their connections, and
determine whether the grounding potential is
fairly uniform throughout. If any of the measurements
show a greater degree of variability than
the other ones, the reason for this should be
determined.
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