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Siemens 4NC5117-2CC20 Window-Type Current Transformer — 100 A/5 A, 2.5 VA

Siemens 4NC5117-2CC20 window-type current transformer.

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ManufacturerSiemens

Part number4NC5117-2CC20

Primary Current 100 A

Secondary Current 5 A

VA Rating 2.5 VA

Accuracy Class 1

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Veteran-owned

CAGE: 9NK75

Window-Type Design Easy Installation 100 A/5 A Ratio 2.5 VA Burden Class 1 Accuracy For Measurement & Protection

Product description

The Siemens 4NC5117-2CC20 is a window-type current transformer designed for easy installation by passing a conductor through its central aperture. It offers a primary to secondary current ratio of 100 A/5 A and a burden capacity of 2.5 VA. This transformer is built to Class 1 accuracy standards, making it suitable for precise current monitoring and protection applications in industrial settings.

This window-type CT is ideal for retrofitting into existing electrical systems without the need to break conductor connections. It is widely used in switchgear, motor control centers, and distribution panels for measuring current to power meters, energy monitors, and protective relays across various industries.

Stanlo Automation, a veteran-owned surplus parts distributor, is your reliable source for the Siemens 4NC5117-2CC20. We provide high-quality industrial components and exceptional customer service to support your automation and electrical projects.

Technical specifications

Primary Current	100 A
Secondary Current	5 A
VA Rating	2.5 VA
Accuracy Class	1
Type	Window-Type Current Transformer

Common applications

Switchgear

Motor Control Centers

Distribution Panels

Building Management

Industrial Monitoring

Compatible systems

Energy meters Protection relays Data loggers

Also known as

Siemens 100A/5A CT Siemens Window CT

Replaces / compatible with

This current transformer is suitable for applications requiring a 100A primary measurement with a 5A secondary output, often replacing older or less accurate CTs.

Technical note

Expert tip

The window diameter is suitable for standard busbars or cable sizes typically found in 100A circuits.

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Frequently asked questions

What are the primary and secondary current ratings for the Siemens 4NC5117-2CC20 current transformer?

The Siemens 4NC5117-2CC20 window-type current transformer has a primary current rating of 100 Amps and a secondary current rating of 5 Amps. It also has a burden capacity of 2.5 VA and is rated to Class 1 accuracy.