TK30N-250/5 CURRENT TRANSFORMER
The TK30N-250/5 (TK 30N Series) is a precision low-voltage measuring current transformer engineered for accurate current transformation in sub-metering, energy management systems, and panel instrumentation. Featuring a 250/5A ratio, it steps down primary AC currents up to 250 Amps to a standard 5 Amp secondary output with high Class 0.5 accuracy and a 2.5VA rated burden capacity. Housed in a flame-retardant polycarbonate enclosure with a 30mm internal aperture (designed for $30 \times 10\text{ mm}$ busbars or round insulated conductors), it delivers reliable insulation, high thermal stability, and vibration resistance for industrial switchboards and distribution cabinets.
Specification | Technical Value |
|---|---|
Model / Part Number | TK30N-250/5 (TK 30N Series) |
Product Type | Low Voltage Busbar / Ring Current Transformer |
Primary Rated Current ($I_{pn}$) | 250A AC |
Secondary Rated Current ($I_{sn}$) | 5A AC |
Current Transformation Ratio | 250/5 A |
Accuracy Class | Class 0.5 (Cl. 0.5 High Precision Metering) |
Rated Burden Power Capacity | 2.5 VA |
Internal Aperture Dimensions | $30 \text{ mm}$ Diameter / $30 \times 10 \text{ mm}$ Busbar Window |
Operating Frequency | 50 / 60 Hz |
Max System Operating Voltage ($U_m$) | 0.72 kV (720V Maximum Operating Voltage) |
Test / Isolation Voltage | 3 kV AC for 1 minute |
Rated Short-Time Thermal Current ($I_{th}$) | $60 \times I_{pn}$ for 1 second |
Continuous Overload Capacity | $1.2 \times I_{pn}$ |
Housing Material | Self-Extinguishing Polycarbonate / ABS Plastic |
Flammability Rating | UL94 V-0 |
Secondary Connection | Screw Clamp Terminals with Integrated Sealable Cover |
Mounting Options | Busbar Clamping / Base Mounting Feet / DIN Rail Adapter Clip |
Operating Temperature | -25°C to +55°C |
Compliance & Standards | IEC 61869-2, IEC 60044-1, CE |
Ssaoco Dammam
- Started from: Jul 10, 2025
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