How to build an Earth (Ground) Resistance Continuous Monitoring Device?

What is your application?

Cabe

Hi,

I am looking for an Earth Resistance Continuous Monitor Device operating on 230VAC 50HZ to verity the Earth/Ground (TT system) every second. In case the resistance drops below the parameter (25~100 ohms), a visual (LED) is lighted plus an audible alarm is heard.

Refer to link below:

http://www.transorbelectrical.com/pq/technical/HomeShield.pdf

Hope this link will be self explanatory.

Thanks.

Regards,

Hi all,

In a place which has more than 200 earthing pits for power and lightning arrestor. Weekly checks are required to be done which is a herculean tasks moreso that manpower cannot be consistent and may also sham on doing the same. I am looking for a solution where in the system can be installed for automatic checking and monitoring so that the values can be read on a daily/ weekly basis with one monitor and print of the output can be put up for validation. Does anyone know of such a system and the firm/vendor which supplies and installs the same. Finance is not a constarint

Hi Mamade,

Can you confirm that you want to test the resistance between a piece of equipment and the Earth Ground. Your second post indicated that you wanted a visual and sound alert if the resistance to ground gets below 100 ohms. For clarification is the piece of equipment grounded or isolated from ground. Your specification for the alarm would indicate that you do not want there to be a ground circuit and want an alarm if there is a connection to Earth Ground.

John

Hi This is resistance between equipment and earth. Further audio and visual warning are desired if  reading of  resistance value goes above 08 ohm.

I think the problem is that they need to check the quality of the connection of an earth spike (for want of better description) to actual Earth.

It's not easy - in an installation with multiple earth spikes, like Ashish has, you could measure the resistance from one spike to all the other spikes but that is actually very difficult to do (since I assume that the installation must work without interruptions).

MK

I think the problem is that they need to check the quality of the connection of an earth spike (for want of better description) to actual Earth.

It's not easy - in an installation with multiple earth spikes, like Ashish has, you could measure the resistance from one spike to all the other spikes but that is actually very difficult to do (since I assume that the installation must work without interruptions).

MK