ABB XT4H250 LSI 250 4P FF

The ABB XT4H250 LSI 250 4P FF is a high-performance Air Circuit Breaker (ACB) from ABB's XT series. Designed for low-voltage distribution systems, it provides reliable protection against overload, short-circuit, and ground faults, making it suitable for industrial, commercial, and infrastructure applications.

**Key Features**

1. **Rated Current**:

   - The rated current is **250A**, suitable for medium-current distribution systems.

2. **Number of Poles**:

   - **4P** (4 poles), designed for three-phase four-wire systems (L1, L2, L3, N).

3. **Tripping Unit**:

   - **LSI** indicates the following protection functions:

     - **L** (Long-delay): Overload protection.

     - **S** (Short-delay): Short-circuit protection.

     - **I** (Instantaneous): Instantaneous short-circuit protection.

   - These functions ensure the breaker can quickly and accurately respond to different fault types.

4. **Breaking Capacity**:

   - **FF** indicates a breaking capacity of **36 kA** (at 415V AC), ensuring safe interruption of high fault currents.

5. **Installation Method**:

   - Suitable for fixed installation, typically mounted in distribution or switchgear panels.

6. **Operation Method**:

   - Supports manual operation, with optional motorized operation mechanisms (motorized closing/opening).

7. **Communication Functionality**:

   - Optional communication modules (e.g., Modbus, Profibus) for remote monitoring and control.

**Technical Specifications**

| Parameter               | Value                        |

| Rated Current (In)       | 250A                         |

| Number of Poles          | 4P (Three-phase four-wire)   |

| Rated Voltage (Ue)       | 690V AC                      |

| Rated Insulation Voltage (Ui) | 1000V AC               |

| Breaking Capacity (Icu)  | 36 kA (415V AC)              |

| Tripping Unit Type       | LSI (Overload, Short-circuit, Instantaneous Protection) |

| Installation Method      | Fixed                        |

| Operation Method         | Manual (Optional Motorized Operation) |

| Standard                 | IEC 60947-2                  |

 **Application Scenarios**

1. **Industrial Distribution**:

   - Used in factories, workshops, and other industrial settings to protect motors, transformers, and other equipment.

2. **Commercial Buildings**:

   - Installed in main or sub-distribution panels in offices, shopping malls, and other commercial spaces.

3. **Infrastructure**:

   - Suitable for critical facilities such as hospitals, airports, and data centers.

**Advantages**

1. **High Reliability**:

   - Advanced tripping technology ensures fast and accurate fault protection.

2. **Modular Design**:

   - Easy to install and maintain, with optional accessories (e.g., communication modules, motorized operation mechanisms).

3. **High Safety**:

   - High breaking capacity ensures safe interruption of fault currents.

4. **Smart Functionality**:

   - Supports remote monitoring and control, ideal for modern smart distribution systems.

**Installation and Maintenance**

1. **Installation**:

   - Should be installed by professional electricians following ABB's installation guidelines to ensure correct and secure wiring.

2. **Maintenance**:

   - Regularly inspect the mechanical and electrical performance of the breaker to ensure proper operation.

   - Clean the surface of the breaker to avoid dust and moisture affecting its performance.

 **Summary**

The ABB XT4H250 LSI 250 4P FF is a high-performance air circuit breaker designed for medium-current low-voltage distribution systems. Its reliable protection functions, high breaking capacity, and modular design make it an ideal choice for industrial, commercial, and infrastructure applications. If you need this product, feel free to contact us!