Outline for Type Evaluation of Measuring Transformers - Part 1: Standard Current Transformers - Scope - This outline is applicable to type evaluation tests of standard current transformers with rated frequencies of 50 Hz or 60 Hz, operating voltages of 500 V and below, and accuracy levels of 0.001 to 0.1. This outline cites the following documents: JJG 313 Current Transformers for Measurement GB/T 4857.3 Packaging - Basic Tests for Transport Packaging - Part 3: Static Load Stacking Test Methods GB/T 4857.10 Packaging - Basic Tests for Transport Packaging - Part 10: Sine Frequency Conversion Vibration Test Method SJ3213 General Electronic Products - Basic Test Methods for Transport Packaging - Automotive Transport Testing Note: For dated references, Only dated versions are applicable to this specification; For undated references, the latest version (including all modification orders) applies to this specification. The terms and definitions used in the referenced documents of this outline, as well as the following terms and definitions, are applicable to this outline. 3.1 Double stage current transformer A precision current transformer composed of two stage current transformers with double iron cores inside the coil. 3.2 Dual stage load capacity The secondary compensation winding of a dual stage current transformer can withstand the maximum load capacity
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