ABB 1SDA058191R1 Current Transformer

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1. Product Overview

The ABB model 1SDA058191R1 is a current sensor / current transformer for external neutral conductor, designed as an accessory to the ABB SACE Emax series circuit breakers (such as E1, E2 and E4 series). Its primary purpose is to monitor the current in the neutral conductor, enabling advanced protection functions such as differential protection and residual current detection.

2. Technical Specifications (typical)

• Model: 1SDA058191R1.

• Description: CURR.S.EX.NEUTRAL N50-100% E1-2 / N50% E4new – meaning neutral current sensor with nominal current range 50-100% for E1/E2 series or 50% for E4 series.

• Application: Accessory for ABB SACE Emax circuit breakers (E1/E2/E4 series).

• EAN No.: 8015644604721.

• Product type: Low voltage circuit breaker accessory / current sensor.

• Approximate weight: ~1 kg.

• Standards: Compatible with ABB accessory specifications for low-voltage circuit breakers.

3. Advantages & Features

Advantages:

• Dedicated neutral conductor current detection allows accurate monitoring of neutral line current, enhancing system safety and protection.

• High compatibility with ABB SACE Emax series ensures seamless integration and ease of maintenance.

• Accessory format allows upgrade of protection capabilities without replacing the main breaker.

Features:

• Supports nominal neutral conductor current range of 50-100% (E1/E2 series) or 50% (E4 series) enabling flexible matching with system requirements.

• Compact design, easy to install inside the breaker or in the distribution cabinet.

• Clear product labeling simplifies part selection and stock management.

• Enhances system capability for residual or unbalanced current detection, useful for differential and ground fault protection.

4. Application Fields

• Low-voltage distribution systems using ABB SACE Emax series breakers, where neutral conductor current monitoring is required.

• Industrial factory power distribution boards, automation equipment power rooms, where neutral conductor current monitoring and anomaly alarms are needed.

• Building installations, data centers, and facilities requiring monitoring of neutral conductor current or residual current in distribution systems.

• Renewable energy systems, UPS distribution panels, busbar systems where neutral conductor condition monitoring is important.

5. Precautions

1. Before selection, ensure that the associated circuit breaker model (E1, E2, E4 series) is compatible and that the neutral conductor design matches the sensor’s rated range.

2. Ensure that installation is compatible with the breaker and that the neutral conductor size passes properly through the sensor aperture; mismatched conductor size may cause measurement errors.

3. Follow the ABB installation guide for wiring and mounting; ensure the neutral conductor is correctly routed and the sensor is securely fixed.

4. Avoid installation environments with heavy vibration, high temperature, humidity or corrosive gases to maintain sensor reliability.

5. During maintenance or breaker replacement, disconnect the main power and verify that the accessory is correctly re-installed and calibrated before re-energising.

6. For systems employing residual current devices, differential protection or neutral conductor monitoring modules, periodic functional testing is recommended to ensure proper operation.

7. Keep product documentation (installation manual, data sheet, wiring diagram) for future maintenance, replacement or fault investigation.

The structure and details of the product：

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