12/3/2020 4:17 PM | |
Posts: 3 Rating: (0) |
Hello I was wondering if someone could help me understand the differences if any between high resistance ground systems and TN, TT and IT networks. the attached document would like the Y cap removed on a HRG system. the manufacture of the equipment the drive is installed on talks about a network. can someone help me understand the differences and how to check with a multimeter TT Network In aTT(Terra-Terra) earthing system, the protective earth connection for the consumer is provided by a local earth electrode, (sometimes referred to as the Terra-Firma connection) and there is another independently installed at the generator. There is no 'earth wire' between the two. The fault loop impedance is higher, and unless the electrode impedance is very low indeed, a TT installation should always have an RCD (GFCI) as its first isolator. The big advantage of the TT earthing system is the reduced conducted interference from other users' connected equipment. TT has always been preferable for special applications like telecommunication sites that benefit from the interference-free earthing. Also, TT networks do not pose any serious risks in the case of a broken neutral. In addition, in locations where power is distributed overhead, earth conductors are not at risk of becoming live should any overhead distribution conductor be fractured by, say, a fallen tree or branch. IT network AttachmentY Capacitor - When to Remove11.pdf (241 Downloads) |
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