1SAJ929501R0500 ABB CT5L500R/4 3-Phase Current Transformer 500 A / 4 A

Why Choose the ABB CT5L500R/4 3-Phase Current Transformer?

The ABB CT5L500R/4 is a dedicated three-phase current transformer designed for use with ABB Universal Motor Controller systems in higher-current motor applications. Supplied under ABB order code 1SAJ929501R0500, it forms part of the ABB 311531-FieldBusPlug product group and enables compatible motor controllers to measure motor currents beyond their direct current measurement range.

Designed for motor currents up to 500 A AC, the CT5L500R/4 has a 500 A rated primary current and a 4 A rated secondary current. The secondary side connects to the ABB UMC100.3 Universal Motor Controller, allowing the controller to measure the corresponding primary current and apply its motor monitoring, protection and diagnostic functions to higher-current feeders.

The CT5L500R/4 uses a linear three-phase current transformer design with integrated copper rails and screw-terminal secondary connections. Its robust construction and FS 10 over-current limiting factor make it particularly suitable for intelligent motor control centres, industrial switchgear and process automation systems incorporating large three-phase motors.

Key Advantages

• Extends compatible ABB UMC motor current measurement to applications up to 500 A.
• Integrated three-phase current transformer monitors all three motor phases.
• 500 A primary / 4 A secondary current transformation.
• Designed specifically for connection to the ABB UMC100.3.
• Linear current transformer characteristics support accurate motor-current monitoring.
• Integrated copper rails provide a purpose-designed primary current path.
• Suitable for industrial motors with nominal currents above the direct measurement capability of the UMC100.3.

Key Features

• ABB CT5L500R/4 three-phase current transformer.
• Designed for compatible ABB UMC100.3 Universal Motor Controller systems.
• 500 A rated primary current.
• 4 A rated secondary current.
• Suitable for motor current measurement up to 500 A AC.
• Three-phase linear current converter set.
• FS 10 over-current limiting factor.
• Integrated copper rails.
• Screw-terminal secondary connections.
• Secondary terminal capacity of 1 × 1.5–6 mm².
• 7 mm wire stripping length.
• Fixed installation with no snap mounting.

High-Current Motor Measurement with the UMC100.3

The ABB UMC100.3 provides sophisticated motor protection, monitoring and diagnostic functions, while external current transformers allow these capabilities to be applied to motors operating at substantially higher currents. The CT5L500R/4 transforms primary motor current of up to 500 A into a proportional 4 A secondary current for measurement by the UMC100.3.

Its integrated three-phase construction provides a coordinated measurement solution for all three motor phases, while the linear transformer characteristics support dependable current measurement across the operating range. This makes the CT5L500R/4 particularly useful for large pumps, compressors, fans, conveyors and other higher-power motors controlled through intelligent ABB motor management systems.

Typical Applications

• ABB UMC100.3 Universal Motor Controller installations.
• Three-phase motors with operating currents above the UMC100.3 direct measurement range.
• Higher-current motor feeders up to 500 A.
• Intelligent motor control centres and MCC systems.
• Large industrial pumps, fans and compressors.
• Conveyor and material handling systems.
• Industrial switchgear and motor protection assemblies.
• Manufacturing, utilities and process automation systems.