NZR 42600100 Current Transformer 100/5 A, 1.5 VA, Class 1

Measuring high currents safely requires a reliable current transformer. The NZR 42600100 converts a primary current of 100 A into a secondary current of 5 A, enabling standard measuring instruments to monitor large electrical loads without direct connection to the power circuit.

Who is it for

Electricians, panel builders, and maintenance technicians who need accurate current measurement for energy monitoring, protection relays, or building automation systems. It suits installations where a cable or busbar passes through the transformer opening.

Main features

• Primary current: 100 A, secondary current: 5 A
• Rated apparent power: 1.5 VA, accuracy class 1
• Overcurrent limiting factor FS 5
• Max. operating voltage 0.72 kV, insulation voltage 3 kV
• Frequency 50/60 Hz
• Accepts cable up to 21 mm diameter or busbar up to 20 x 10 mm
• Mounting via snap-on, screw, or cable tie
• Housing made of self-extinguishing polycarbonate
• Connection via screw terminals
• Operating temperature -5 °C to +50 °C
• Protection class IP20

Specifications

• Primary current: 100 A
• Secondary current: 5 A
• Rated apparent power: 1.5 VA
• Accuracy class: 1
• Overcurrent limiting factor: FS 5
• Max. operating voltage: 0.72 kV
• Insulation voltage: 3 kV
• Frequency: 50/60 Hz
• Max. cable diameter: 21 mm
• Max. busbar dimensions: 20 x 10 mm
• Mounting type: snap-on, screw, cable tie
• Housing material: self-extinguishing polycarbonate
• Connection type: screw terminals
• Operating temperature range: -5 °C to +50 °C
• Storage temperature range: -25 °C to +70 °C
• Protection class: IP20

Tips

Ensure the primary conductor is centered in the opening for best accuracy. For busbar mounting, verify dimensions do not exceed 20 x 10 mm. Use appropriate torque on screw terminals to avoid damage.