ABB 1TNA900241R0145 Current Transformer KORC 4SL 145/4

ABB 1TNA900241R0145 Current Transformer KORC 4SL 145/4

Let's break down the part number ABB 1TNA900241R0145 and the description Current Transformer KORC 4SL 145/4.

This is a standard format for ABB component identification. Here’s what each part of the code means:

Part Number Breakdown: 1TNA900241R0145

• 1TNA: This is a common prefix for ABB's low-voltage instrument transformers (like current transformers and voltage transformers) within their product catalogs.

• 900241: This is the unique Article Number or Item Number for this specific current transformer model. This is the key identifier you would use when searching in a catalog or ordering a replacement.

• R0145: This is typically a revision or version code (e.g., Revision 0145), indicating a specific manufacturing batch or a minor design update.

Description Breakdown: KORC 4SL 145/4

This part of the description gives you the technical specifications of the transformer.

• KORC: This is the Product Series or Type Designation. "KORC" is a specific family of ring-core (toroidal) current transformers from ABB, known for their accuracy and compact design.

• 4SL: This indicates the Accuracy Class.

◦ 4 means the transformer has a composite error of ≤ 4%. This is a common accuracy class for measurement in energy meters (kWh) under a wide range of loads.

◦ SL stands for "Low Power," meaning the burden (the load it can drive) is relatively small, which is typical for modern electronic meters.

• 145/4: This specifies the Rated Primary Current and the Rated Secondary Current.

◦ 145: The Rated Primary Current (Ipr) is 145 Amps. This is the current level the transformer is designed to measure in the main conductor.

◦ 4: The Rated Secondary Current (Isr) is 4 Amps. This is the standardized output current that will be delivered to the connected meter or relay when the primary current is at its rated value.

Summary of Specifications

Feature

Specification

Meaning

Manufacturer

ABB

A leading global technology company.

Product Type

Current Transformer (CT)

Used to step down high primary current to a safe, measurable secondary current.

Product Series

KORC

Ring-core (toroidal) type, compact design.

Rated Primary Current

145 A

Designed to measure a nominal current of 145 Amps.

Rated Secondary Current

4 A

Provides a 4 Amp output signal at full primary current.

Accuracy Class

4SL

Suitable for measurement (e.g., energy metering) with a composite error of ≤ 4% at a low burden.

Article Number

900241

The unique key for ordering and identification.