A Current Transformer (CT) is an instrument transformer designed to reduce high primary currents to a lower, measurable value for metering, protection, and control systems. It ensures accurate current scaling while isolating measuring instruments from high-voltage circuits.
| Feature | Details |
|---|---|
| Primary Current Rating | Ranges from 1A to 5000A (or higher for custom applications) |
| Secondary Current Output | Typically 1A or 5A for compatibility with standard devices |
| Accuracy Class | 0.2, 0.5, and 1.0 for metering; 5P, 10P for protection |
| Burden Capacity | Varies from 1 VA to 50 VA depending on application |
| Frequency Range | 50 Hz or 60 Hz based on system requirements |
| Insulation Medium | Resin-cast, oil-filled, or SF6 gas-insulated for enhanced durability |
| Core Material | CRGO (Cold Rolled Grain Oriented) steel for minimal core losses |
| Construction Type | Wound type, bar type, and window (ring) type models available |
| Protection Features | Equipped with short-circuit protection and overload tolerance |
| Operating Temperature | Suitable for extreme conditions (-40°C to +70°C) |
| Compliance Standards | Conforms to IEC 61869-2, ANSI C57.13, and IS standards for CTs |
| Applicable Standards | IEC, NEMA |
| Range | 72.5kV to 800kV |
| Frequency | 50/60HZ |
| Rated Current | Upto 5000A |
| Secondary Current | 0.577 or 1 or 5 |
| STR kA/ sec | 63/1 or 40/3 |
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