Rittal Current Transformer 400/5A Class 1 5VA for DIN Rail or Screw Mounting 9677875

The Rittal 9677875 current transformer converts a 400 A primary current to a standard 5 A secondary signal, making it compatible with a wide range of measuring instruments and protection relays. Unlike many transformers that require busbar mounting, this unit supports both DIN rail and screw fixing, offering flexibility in panel installations.

Highlights

• Transformation ratio: 400 A to 5 A
• Accuracy class 1 with 5 VA rated burden
• Mounts on 35 mm DIN rail or with screws
• Accepts busbars up to 30 x 10 mm or cables up to 21 mm diameter
• Self-extinguishing polyamide housing

In daily use

Install the transformer on a DIN rail or screw it directly to the panel. Route the primary conductor through the window opening—either a busbar up to 30 x 10 mm or a cable up to 21 mm in diameter. The secondary terminals deliver a 5 A current proportional to the primary current, ready for connection to ammeters, energy meters, or protection devices. The compact design and IP20 protection suit indoor control cabinets.

Full specifications

• Primary current: 400 A
• Secondary current: 5 A
• Accuracy class: 1
• Rated power: 5 VA
• Max. operating voltage: 0.72 kV
• Frequency: 50/60 Hz
• Insulation class: E
• Overcurrent limiting factor: FS 5
• Mounting: DIN rail 35 mm, screw mounting
• Max. busbar dimensions: 30 x 10 mm
• Max. cable diameter: 21 mm
• Housing material: self-extinguishing polyamide
• Operating temperature: -20 °C to +50 °C
• Protection category: IP20
• Standards: IEC 61869-2

Final note

With its dual mounting options and Class 1 accuracy, this transformer is a practical choice for retrofitting or new installations requiring reliable current measurement.