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㓪ࠊ䇈ᯢ ѻક䗝⫼᠟ݠ

accuracy class + P + accuracy limit factor, such as
10P15ˊ
3.3.1 ޚ⹂㑻 3.3.1 Accuracy class
ҹ䆹ޚ⹂㑻೼乱ᅮޚ⹂䰤ؐϔ⃵⬉⌕ϟⱘ᳔໻ It is designated by the highest permissible
ܕ䆌໡ড়䇃Ꮒⱘⱒߚ᭄ᷛ⿄ˈᷛޚޚ⹂㑻Ў˖5 ੠ 10DŽ percentage composite error for the accuracy class
concerned at rated accuracy limit primary current. The

standard accuracy classes are 5 and 10.
3.3.2 ޚ⹂䰤ؐ㋏᭄ 3.3.2 Accuracy Limit Factor

ᰃޚ⹂䰤ؐϔ⃵⬉⌕Ϣ乱ᅮϔ⃵⬉⌕П↨DŽᷛޚ It is the ratio of accuracy limit primary current
ޚ⹂䰤ؐ㋏᭄Ў˖5ǃ10ǃ15ǃ20 ੠ 30DŽ՟བ 5P15 and rated primary current. The standard ALF is 5, 10,
㸼⼎乱ᅮޚ⹂䰤ؐϔ⃵⬉⌕ؐЎ乱ᅮϔ⃵⬉⌕ؐⱘ 15, 20 and 30ˊ
15 סᯊˈ⬉⌕Ѧᛳ఼ֱᡸ㑻ⱘ໡ড়䇃Ꮒİ5%DŽ For example,5P15 means the composite error for
protective class of current transformer is equal to or less

than 5% while rated accuracy limit primary current
equals to 15 times rated primary current.
3.4 ֱᡸ⫼⬉य़Ѧᛳ఼ޚ⹂㑻ⱘᷛ⿄ 3.4 The designation for accuracy class of voltage
ᣝ GB1207-2006 㾘ᅮ˖᠔ֱ᳝ᡸ⫼⬉य़Ѧᛳ఼ˈ transformer for protection
䰸࠽ԭ⬉य़㒩㒘໪ˈᑨ㒭ߎⳌᑨⱘ⌟䞣ޚ⹂㑻੠ֱᡸ According to the stipulation in GB1207-2006,
ޚ⹂㑻DŽ both measuring accuracy class and protective accuracy
class have respectively to be given for all protective
voltage transformers,except the residual voltage
windingˊ

3.4.1 ֱᡸޚ⹂㑻 3.4.1 Protective accuracy class
ҹ䆹ޚ⹂㑻೼ 5%乱ᅮ⬉य़ࠄ乱ᅮ⬉य़಴᭄Ⳍᑨ It is designated by the highest permissible
ⱘ⬉य़㣗ೈݙ᳔໻ܕ䆌⬉य़䇃Ꮒⱘⱒߚ᭄ᷛ⿄,݊ৢ percentage voltage error at the voltage range from 5%
ᷛҹᄫ↡ PDŽᷛޚֱᡸޚ⹂㑻Ў˖3P ੠ 6PDŽ݊Ё 3 rated voltage to the voltage correspondent to the rated
㸼⼎⬉य़䇃Ꮒ䰤ؐ 3%ˈ6 㸼⼎⬉य़䇃Ꮒ䰤ؐ 6%DŽ voltage factor for the accuracy class concerned. "P"
follows the accuracy class. The standard protective
accuracy class is 3P or 6P, 3 means the limit voltage

error is 3% and 6 is 6%ˊ
3.4.2 ࠽ԭ⬉य़㒩㒘াᷛ⿄ֱᡸޚ⹂㑻 3.4.2 To the residual voltage winding, protective
accuracy class only is designated
3.5 ⬉य़Ѧᛳ఼ⱘ乱ᅮ䕧ߎϢޚ⹂㑻 3.5 The rated output and accuracy class for voltage
↣ৄ⬉य़Ѧᛳ఼↣Ͼ㒩㒘া⒵䎇Ā乱ᅮ䕧ߎāᷣ transformer
ݙⳌᑨⱘϔϾޚ⹂㑻㽕∖DŽབৠᯊ䳔⒵䎇޴Ͼޚ⹂㑻 Every winding for a voltage transformer can only
㽕∖ˈ䅶䋻ᯊ乏ࡴҹ䇈ᯢDŽ satisfy a accuracy class requirement in the “rated
output” column correspondently. If customers want to
satisfy more than one accuracy class requirement

simultaneously, you have to declare while orderingˊ
3.6 ⬉⌕Ѧᛳ఼Ѡ⃵乱ᅮ⬉⌕Ў 5A ៪ 1A ៪ᣝ乒ᅶ 3.6 The rated secondary current of a current
㽕∖⫳ѻ transformer is 5A or 1A or customer’s requirement

ᑓϰಯӮѦᛳ఼ॖ᳝䰤݀ৌ ഄഔ˖ᑓϰⳕಯӮᏖϰජ㸫䘧 ௕ۜġ

Ԩܥġ c ď໇೒Đc ďޏ೬Đ Ҏყġ c ㄀ 3 义