ABB 2CSF204005R1250 Residual Current Circuit Breaker

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1. Product Overview

ABB 2CSF204005R1250 is a Residual Current Circuit Breaker (RCCB) from the ABB F200 series, designed to provide reliable earth leakage protection in low-voltage electrical systems. It quickly disconnects the power supply when residual current is detected, reducing the risk of electric shock and fire hazards in industrial, commercial, and residential installations.

2. Main Technical Specifications

• Manufacturer: ABB

• Model: 2CSF204005R1250

• Series: F200 Series

• Product Type: Residual Current Circuit Breaker (RCCB)

• Number of Poles:

  • 4 poles

• Rated Current (In):

  • 125 A

• Rated Residual Operating Current (IΔn):

  • 500 mA

• Residual Current Type:

  • Type A (sensitive to AC and pulsating DC residual currents)

• Rated Operational Voltage (Ue):

  • 400 V AC

• Rated Frequency:

  • 50 / 60 Hz

• Rated Insulation Voltage (Ui):

  • 500 V

• Rated Impulse Withstand Voltage (Uimp):

  • 4 kV

• Short-Circuit Protection:

  • To be used in combination with suitable upstream protective devices

• Mounting:

  • DIN rail mounting

• Ambient Temperature Range:

  • -25 °C to +55 °C

• Standards:

  • IEC / EN 61008-1

3. Advantages and Features

1. Reliable Earth Leakage Protection
   Fast response to residual currents enhances personal safety and fire prevention.

2. Suitable for High Current Applications
   Rated current up to 125 A makes it suitable for main and high-load distribution circuits.

3. Type A Sensitivity
   Detects both AC and pulsating DC leakage currents, expanding application flexibility.

4. Compact and Easy Installation
   Modular DIN rail design simplifies integration into distribution boards.

5. High Quality and Long Service Life
   Built with ABB’s proven components to ensure stable and durable performance.

4. Typical Applications

• Industrial low-voltage distribution systems

• Commercial building electrical installations

• Public buildings and infrastructure

• Main distribution circuits and large equipment

• Fire protection leakage circuits

5. Installation and Operation Notes

1. This RCCB does not provide overload or short-circuit protection and must be used with upstream circuit breakers or fuses.

2. Verify rated current and residual operating current according to system requirements before installation.

3. Ensure correct connection of phase and neutral conductors.

4. Test the device using the test button before commissioning.

5. Periodic testing is recommended to ensure long-term reliable operation.

The structure and details of the product：

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