Ground Mat Resistance Test Report Form

6 2 test electrodes 6 3 stray direct currents 6 4 stray alternating currents 6 5 reactive component of impedance of a large grounding system 6 6 coupling between test leads 6 7 buried metallic objects 7.

Ground mat resistance test report form.

Together to form a common grounding electrode. Provide maximum resistance of ground rod to earth less then twenty five 25 ohms. Microsoft word cs 4225 a 11 05 doc. In areas where driving ground rods may be impractical the two point method can be used.

The objective of the test and analysis was to evaluate the plant grounding system with respect to safety. Station name weather and soil conditions type and serial number of the earth tester current c2 and potential p2 probe distances to be used see section 4 5 a sketch of the test area including special terrain features along the probe directions. Therefore the meter reading on a. Current and ground testers use alternating current for testing.

Take ground rod readings at each pole or structure ohms date pole no. The induced frequency test can test grounding systems that are in use and does not require the interruption of service to take measurements. 2 point dead earth method. Recorded on the ground mat resistance test report form shown in appendix c.

Other markings are used on test sets originally designed outside. A typical test set has four terminals two current terminals marked c1 and c2 and two potential terminals marked p1 and p2. Executive summary this report describes the ground tests and analysis of the springfield power station. Test equipment three typical test sets are shown in fig.

This can result in a continuity test being performed rather than a ground resistance test. However at power line frequencies the resistive component of the earth impedance is usually much bigger than the reactive component so you will see the terms impedance and resistance used almost interchangeably. Ground rod test sign lighting. The current generated by a test instrument will be split among all the paths.

So you d think we would talk about impedance not resistance. One topic which needs to be stressed is that the resistance of a ground bed as shown in figure 1 cannot be accurately measured unless it is isolated from other parallel ground paths. The procedures for earth resistance testing are referenced in ieee standard no. Understanding the proper field application of this test is vital to obtaining accurate results.

Ground loop impedance testing is used to determine the total alternating current resistance of the circuit that would be involved under fault conditions. Ground impedance 8 1 general 8 2 methods of measuring ground impedance 8 3 testing the integrity of the ground grid. Since the ground bed resistance testing was covered previously the last two components to be tested according to 12 28 are the grounding electrode conductor and the frame grounding conductor. Sample smart ground report doc 3 of 39 4 2 2008 grounding system testing and analysis of the springfield power station 1.