Table 4.

Results of ground electrode impedance measurements using the impact method.

No	Month	Ground electrode impedance ZE (Ω)
		ZE1 (Ω)	ZE2 (Ω)	ZE3 (Ω)	ZEAVG,2p (Ω)
1	July	0.173	0.173	0.174	0.173
2	August	0.101	0.100	0.105	0.102
3	September	0.126	0.123	0.121	0.123
4	October	0.650	0.651	0.653	0.651
5	November	0.661	0.658	0.649	0.656
6	December	0.321	0.321	0.320	0.321
7	January	0.330	0.323	0.321	0.325
8	February	0.285	0.286	0.289	0.287
9	March	0.655	0.651	0.647	0.651
10	April	0.961	0.949	0.954	0.955
11	May	0.211	0.213	0.214	0.213
12	June	0.116	0.115	0.114	0.115