ABB CM-CT 100/5 virtamuuntaja 100/5A 2,5VA luokka 1 1SVR450116R5200

In electrical distribution panels, the ABB CM-CT 100/5 current transformer converts high primary currents into a standardized 5 A secondary signal for metering and protection devices. It is suited for single-phase systems where a 100 A primary current must be monitored safely and accurately.

Key specifications

• Primary rated current: 100 A
• Secondary rated current: 5 A
• Rated apparent power: 2.5 VA
• Accuracy class: Class 1
• Rated frequency: 50/60 Hz
• Rated insulation voltage: 600 V AC
• Overcurrent limiting factor: FS5
• Mounting: DIN rail or screw mounting
• Connection: Screw terminals, 0.5–4 mm²

Why choose it

The transformer meets IEC/EN 61869-2, ensuring consistent performance in industrial and commercial metering circuits. Its compact thermoplastic housing is self-extinguishing, and screw terminals provide secure wiring.

Ideal use cases

• Energy monitoring in main distribution boards
• Feeding ammeters, wattmeters, or protection relays
• Retrofitting existing panels where a 100/5 A ratio is required

Good to know

The CM-CT 100/5 operates from -25 °C to +50 °C and can be stored from -40 °C to +80 °C. Terminals are protected to IP20, and the housing to IP30.