1SDA055055R1 ABB TA EXT NEUTRAL 320A T4 320

Why Choose the ABB TA EXT NEUTRAL 320A T4 320?

The ABB TA EXT NEUTRAL 320A T4 320, order code 1SDA055055R1, is a 320 A external neutral current transformer designed for compatible ABB SACE Tmax T4 320 circuit breaker protection systems. It provides current sensing on an external neutral conductor where neutral-current measurement is required by the associated electronic protection arrangement.

Designed specifically for the ABB SACE Tmax T4 320 platform, the current transformer allows the protection system to monitor current flowing through a neutral conductor located outside the circuit breaker's main poles. This supports suitable three-phase distribution configurations where neutral-current information is required for the selected protection functions.

With a rated current of 320 A, the 1SDA055055R1 is matched to compatible T4 320 protection configurations. As a genuine ABB accessory, it is intended to operate as part of the appropriate Tmax electronic protection system rather than as a standalone protection device.

Key Advantages

• Genuine ABB SACE Tmax T4 protection accessory.
• 320 A external neutral current transformer.
• Designed specifically for compatible Tmax T4 320 configurations.
• Provides external neutral conductor current sensing.
• Supports compatible electronic protection arrangements requiring neutral-current measurement.
• Allows neutral sensing without routing the neutral through an additional main circuit breaker pole.
• Purpose-designed for integration with ABB Tmax protection architecture.

Key Features

• ABB SACE Tmax T4 accessory.
• TA external neutral current transformer.
• 320 A rated current.
• Designed for the T4 320 configuration.
• External neutral conductor current measurement.
• Compatible with appropriate ABB Tmax T4 electronic protection arrangements.
• Dedicated current-sensing accessory.
• Accessory component rather than a standalone circuit breaker or trip unit.
• Country of origin: Italy.
• Weight: approximately 0.7 kg.
• EAN: 8015644562052.

External Neutral Current Measurement

In compatible three-phase distribution systems, the protection arrangement may need to measure current flowing through an external neutral conductor. The ABB 1SDA055055R1 provides this sensing function for the Tmax T4 320, enabling the associated electronic protection system to receive neutral-current information while the neutral remains external to the circuit breaker's main poles.

The transformer is rated at 320 A and should be coordinated with the appropriate ABB Tmax T4 electronic protection configuration. Correct matching of the circuit breaker, trip unit and external neutral current transformer is important to achieve the intended neutral-current sensing and associated protection functions.

Typical Applications

• ABB SACE Tmax T4 320 circuit breaker protection systems.
• Three-phase electrical distribution systems with external neutral conductors.
• Industrial low-voltage distribution switchboards.
• Commercial building electrical distribution panels.
• Manufacturing and process plant electrical systems.
• Main and sub-distribution assemblies.
• Systems requiring external neutral-current measurement.
• Compatible electronic protection arrangements requiring a 320 A neutral current transformer.