Method for detecting accuracy of optical current transformer for measuring
A technology of current transformers and detection methods, applied in the direction of measuring electric variables, voltage/current isolation, measuring devices, etc.
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[0046] Example
[0047] 1 Technical requirements for photoelectric transformers
[0048] The photoelectric current transformer must meet all the technical requirements specified in the corresponding technical standards or technical conditions. The specific technical requirements are as follows:
[0049] 1.1 Error limit of photoelectric transformer
[0050] 1.1.1 Current transformer for measurement
[0051] At any value under the rated power and rated power factor, the current error (ratio difference and phase difference) of the photoelectric CT should not exceed the limits listed in Table 11.
[0052] Table 1 Error limits for measuring CT
[0053]
[0054] 2 Verification equipment and conditions
[0055] 2.1 Main equipment
[0056] 2.1.1 Current transformer for measurement
[0057] 2.1.1.1 Standard current transformer or other proportional standard device (hereinafter referred to as current standard device). The accuracy level and technical performance of the current standard sho...
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