K-ELECTRIC 223013-250/5A Three-Phase Current Transformer, Primary 250 A, Secondary 5 A, Class 1, 5 VA

Accurate current measurement in three-phase installations requires a transformer that reliably converts high primary currents into standardized secondary signals. The K-ELECTRIC 223013-250/5A three-phase current transformer meets this need with a 250 A primary rating, a 5 A secondary output, and Class 1 accuracy for energy metering and power monitoring.

Who is it for

Electricians, panel builders, and facility managers who install or maintain three-phase power distribution systems and need dependable current transformers for metering circuits, energy management, or protective relaying.

Main features

• Three-phase current transformer with 250 A primary current and 5 A secondary current
• Accuracy Class 1 and rated burden 5 VA for precise measurement
• Rated frequency 50/60 Hz, insulation voltage 0.72 kV
• Overcurrent limit factor FS 5, short-time thermal current 15 kA (1s), dynamic current 37.5 kA (peak)
• Busbar mounting with window dimensions 20 x 30 mm
• Self-extinguishing polycarbonate housing, IP20 protection
• Operating temperature -5°C to +40°C, storage -25°C to +70°C

Specifications

• Transformer type: Three-phase current transformer
• Primary current: 250 A
• Secondary current: 5 A
• Accuracy class: Class 1
• Rated power: 5 VA
• Rated frequency: 50/60 Hz
• Rated insulation voltage: 0.72 kV
• Overcurrent limit factor: FS 5
• Short-time thermal current: 15 kA (1s)
• Dynamic current: 37.5 kA (peak)
• Mounting type: Busbar / screw mounting
• Busbar window dimensions: 20 x 30 mm
• Housing material: Self-extinguishing polycarbonate
• Protection degree: IP20
• Operating temperature: -5°C to +40°C
• Storage temperature: -25°C to +70°C

Tips

Ensure the primary conductor fits through the 20 x 30 mm window and that the secondary circuit is never left open while primary current flows. Verify the burden of connected instruments does not exceed 5 VA to maintain Class 1 accuracy.