Gossen Metrawatt SC40-B Split-Core Current Transformer, Primary 150 A, Secondary 5 A, Class 1, 2.5 VA, 40 mm Opening (U518A)

Electrical installers and panel builders use the Gossen Metrawatt SC40-B to measure high AC currents safely and accurately in distribution boards and industrial control systems. This split-core current transformer converts a 150 A primary current into a standard 5 A secondary signal, compatible with common measuring instruments and energy meters. The openable core allows installation without disconnecting the primary conductor, saving time during retrofits.

Key specifications

• Primary current: 150 A
• Secondary current: 5 A
• Accuracy class: 1
• Rated burden: 2.5 VA
• Maximum operating voltage: 0.72 kV
• Frequency: 50/60 Hz
• Transformer type: split-core (openable)
• Maximum conductor diameter: 40 mm
• Maximum busbar dimensions: 40 x 10 mm
• Insulation voltage: 3 kV
• Housing material: self-extinguishing polycarbonate
• Protection rating: IP20
• Operating temperature: -20°C to +50°C
• Mounting: cable tie, base plate, DIN rail (with adapter)
• Connection: screw terminals
• Overcurrent limiting factor: FS5
• Standard compliance: IEC/EN 61869-2

Why choose it

The split-core design simplifies installation in existing installations, and the Class 1 accuracy ensures reliable measurements for billing or monitoring. The robust polycarbonate housing withstands typical industrial environments.

Ideal use cases

• Retrofitting energy meters in distribution panels
• Monitoring current in motor control centers
• Connecting to power analyzers or transducers

Good to know

The transformer is intended for indoor use (IP20) and must be installed in an enclosure. A DIN rail adapter is available separately for panel mounting.