Siemens Sentron Window current transformer, 75A:5A Part number 4NC5115-2CC21

Product Overview

The Siemens SIRIUS bushing-type current transformer (SKU: 4NC5115-2CC21) is designed for measurement and protection applications. It offers a 75 A primary and 5 A secondary ratio with 2.5 VA rated output and accuracy class 1.0, suitable for monitoring bus-bar systems and current measurement on compact installations.

Key Features

• Primary/secondary current ratio: 75 A / 5 A
• Rated apparent power: 2.5 VA
• Accuracy class: 1.0
• Bushing-type through conductor for compact bus-bar or conductor integration
• Touch-protected terminals (IP≥20)
• Mounting via screw fixation or DIN rail adapter

Technical Specifications

• Product Type: Bushing-type Current Transformer
• Article Number: 4NC5115-2CC21
• Primary Rated Current (Iₙ): 75 A
• Secondary Rated Current: 5 A
• Rated Output (Sₙ): 2.5 VA
• Accuracy Class: 1.0
• Connection Type: Screw-type terminals
• Maximum bus-bar opening / conductor diameter: 20 mm × 20 mm or Ø 19 mm
• Dimensions (approx.): Width 60 mm × Height 75.3 mm × Depth 55 mm
• Weight (approx.): 0.451 kg

Compliance & Certifications

• Complies with Siemens SIRIUS product standards
• Touch-protected according to IEC/EN standards (IP20 rated)

Applications

Ideal for use in electrical distribution boards, bus-bar systems and switchgear where precise current measurement or monitoring is required. Suitable for integration with Siemens measurement & protection equipment and bushing-type systems in industrial and commercial installations.