详情
Power system level by measuring
current transformers, precision measuring instruments (such as
the meter) with a transformer.
According to level of measurement
accuracy requirements of transformer can be used as a core of
soft magnetic materials of different materials. The higher
permeability core, the smaller the measurement error of CT, the
higher the precision.
Currently the largest amount of core
material is cold-rolled silicon steel sheet, followed by the
amorphous alloy and permalloy. In recent years, high-precision
level (such as the 0.2, 0.2S class, 0.5S level) of the
transformer demand is increasing rapidly. When asked to change
than smaller, low-ampere turns, or the requirements of the core
dimensions due to volume restrictions on the circumstances, the
use of cold-rolled silicon steel sheet is often not reach the
measurement accuracy.
Although the use of high
permeability permalloy core meet the required precision, but the
price is high. The use of amorphous alloy core can not only
achieve the required accuracy but also the price is lower than
the permalloy. Therefore, amorphous alloy core current
transformer measured level of domestic demand increased
rapidly.
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China |
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Electric current transformer
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（面議）
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