Secondary winding is the output coil in a current transformer that produces a reduced current proportional to the primary current for measurement and protection.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Burden | 2.5-30 VA | |
| Frequency | 50/60 Hz | |
| Turns Ratio | Typically 100:1 to 5000:1 | |
| Accuracy Class | 0.2, 0.5, 1, 3, 5 | |
| Thermal Rating | 1.2 x rated current continuous | |
| Insulation Class | Class F (155°C) minimum | |
| Rated Secondary Current | 1A or 5A |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
A device that transforms high primary current into a lower, proportional secondary current for measurement and protection purposes.
Electrical component that steps up input voltage to high voltage levels required for dielectric strength testing
An electromagnetic device that transfers electrical energy between circuits through electromagnetic induction, typically used to change voltage levels.
A practical evidence checklist for RFQ preparation and supplier evaluation.
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Manufacturer profiles associated with Secondary Winding.
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Open-circuiting the secondary winding creates dangerously high voltages that can damage insulation, cause arcing, and pose serious safety hazards. Current transformers must never operate with an open secondary circuit.
1A secondary windings have more turns and are used for long-distance transmission with lower power loss, while 5A secondary windings have fewer turns and are common for local measurement with standard instruments.
Accuracy class (0.2, 0.5, 1, etc.) indicates the maximum percentage error at rated current. Class 0.2 has ±0.2% error for metering, while Class 5 has ±5% error for protection applications.
Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.