Gossen Metrawatt SC40-C Current Transformer 250/5 A, Class 1, 5 VA, Window Type (U528A)

The SC40-C from Gossen Metrawatt converts high primary currents into a standard 5 A secondary signal for measuring instruments and protection relays. Its 40 x 10 mm busbar opening and 30 mm cable diameter accept common conductor sizes without interrupting the circuit.

Highlights

• Primary current 250 A, secondary current 5 A
• Accuracy class 1 and rated burden 5 VA
• Window-type design for busbar, DIN rail (with adapter), or screw mounting
• Self-extinguishing polycarbonate housing, operating range -25 °C to +50 °C

In daily use

The transformer connects via screw terminals and suits 50/60 Hz networks up to 0.72 kV. Its thermal rated short-time current is 300 A, dynamic rated short-time current 750 A, giving headroom for overloads and inrush conditions.

Full specifications

• Transformation ratio: 250/5 A
• Accuracy class: 1
• Rated power (burden): 5 VA
• Frequency: 50/60 Hz
• Max. operating voltage (Ui): 0.72 kV
• Rated impulse withstand voltage (Uimp): 3 kV
• Thermal rated short-time current (Ith): 300 A
• Dynamic rated short-time current (Idyn): 750 A
• Busbar opening: 40 x 10 mm, cable diameter: 30 mm
• Housing material: self-extinguishing polycarbonate
• Protection degree: IP20
• Standards compliance: IEC 61869-2

Final note

A compact window-type current transformer for reliable 250 A measurement in industrial and building installations.