2CSG280425R1000 ABB CT1M-6 300 300/5A Current Transformer

Why Choose the ABB CT1M-6 300 Current Transformer?

The ABB CT1M-6 300 is a through-primary 300/5 A current transformer designed for indirect measurement of electrical network parameters. Supplied under ABB order code 2CSG280425R1000, it transforms a rated primary current of 300 A into a proportional 5 A secondary current for compatible ammeters, multifunction meters, energy meters and monitoring equipment.

Part of ABB's CT1M current-transformer range, the CT1M-6 300 is designed in accordance with IEC 61869-2. It provides a best accuracy class of 0.5, with rated burdens of 2.5 VA at class 0.5, 7.5 VA at class 1 and 7.5 VA at class 3, supporting dependable current and energy measurement in commercial and industrial installations.

The CT1M-6 frame provides a generous through-primary opening, accommodating cables up to 65 mm diameter and busbars up to 80 × 10 mm, 60 × 30 mm or 50 × 50 mm. With 126 × 104 × 45 mm dimensions, IP20 protection and a rated frequency of 50–60 Hz, it is well suited to switchboards and metering assemblies requiring flexible conductor accommodation.

Key Advantages

• 300/5 A transformation ratio for indirect AC current measurement.
• Best measurement accuracy of class 0.5.
• 2.5 VA rated burden at class 0.5.
• 7.5 VA rated burden at class 1.
• 7.5 VA rated burden at class 3.
• Standard 5 A secondary output for compatible electrical measuring instruments.
• Large through-primary opening accommodates substantial cables and busbars.
• FS 10 instrument security factor.
• Busbar and mounting-foot fixings are supplied as standard for the CT1M-6 series.
• Optional DIN rail mounting adapter provides additional installation flexibility.

Key Features

• ABB CT1M-6 series current transformer.
• 300 A rated primary current.
• 5 A rated secondary current.
• 300/5 A transformation ratio.
• Accuracy class 0.5.
• 50–60 Hz rated frequency.
• IP20 protection rating.
• FS 10 overcurrent limiting factor.
• Through-primary, closed-core current-transformer construction.
• Maximum cable diameter of 65 mm.
• Suitable for busbars up to 80 × 10 mm, 60 × 30 mm or 50 × 50 mm.

Reliable Indirect Current Measurement for Metering Systems

Current transformers enable electrical meters and measuring instruments to monitor circuits carrying currents beyond their direct-input capability. The ABB CT1M-6 300 converts a rated 300 A primary current into a proportional 5 A secondary current, providing a standardised signal for compatible energy meters, ammeters and multifunction measuring equipment.

With class 0.5 accuracy available at a 2.5 VA burden, the CT1M-6 300 supports dependable current and energy measurement. Its large through-primary opening provides flexibility for substantial cables and busbars, making it particularly useful in commercial and industrial distribution panels where conductor dimensions demand a larger CT aperture.

Typical Applications

• Indirect electrical current measurement up to 300 A.
• Energy meters with 5 A current-transformer inputs.
• Ammeters and multifunction electrical measuring instruments.
• Commercial and industrial switchboards.
• Electrical distribution and metering panels.
• Large-cable and busbar metering installations.
• Energy monitoring and load-analysis systems.