2CSG221150R1101 ABB CT4/400 Current Transformer

2CSG221150R1101 corresponds to the ABB CT4/400 current transformer, a measuring component intended to reproduce the primary current as a standardized secondary current for connected metering or monitoring equipment.

Unlike switching devices or protective breakers, this component is identified primarily by its transformation ratio and measurement characteristics. For maintenance records, the complete ABB ordering reference is normally retained together with the associated distribution assembly to avoid confusion with transformers of similar physical dimensions.

Ratio Identification

Current transformers are generally distinguished by their transformation ratio rather than by external appearance.

 

Marking	Meaning
CT	Current Transformer family
4/400	400A primary current version

 

Selecting the correct ratio is one of the main identification steps during replacement because transformers with identical housings may provide different measurement outputs.

The secondary output is intended for compatible measuring or monitoring equipment and should be matched according to the installed system requirements.

In distribution equipment, the CT4/400 is typically recorded together with the monitored circuit rather than as an independent device.

Typical inventory records include:

This approach helps distinguish transformers that are mechanically similar but electrically different.

Selection Checklist

 

When comparing an installed transformer with a replacement unit, maintenance personnel normally confirm:

 

Verification Point	Purpose
ABB Ordering Number	Exact product identification
Current Ratio	Match measuring circuit
Secondary Rating	Maintain instrument compatibility
Mounting Dimensions	Fit existing installation
Frequency Rating	Match system requirements

 

Replacing a current transformer solely by appearance is generally not recommended because ratio differences directly affect measurement accuracy.

The 2CSG221150R1101 reference is commonly maintained in:

• electrical distribution spare inventories;
• switchboard maintenance records;
• metering equipment documentation;
• industrial inspection inventories.

Using the complete ABB ordering number provides the most reliable method of identifying this transformer configuration.

Hot Tags: 2csg221150r1101 abb ct4/400 current transformer, China 2csg221150r1101 abb ct4/400 current transformer suppliers