ABB OT125A4 Switch Disconnector

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1. Product Overview

The ABB OT125A4 is an industrial-grade Switch Disconnector designed for electrical systems to provide safe isolation and overload protection. This switch disconnector supports high rated current and short-circuit withstand capability and is manually operated to ensure safe disconnection during maintenance or inspection. The OT125A4 features a modular design, compact structure, and easy installation, suitable for various industrial distribution systems and motor control cabinets.

2. Technical Specifications

• Model: OT125A4

• Product Type: Switch Disconnector

• Rated Current: 125 A

• Rated Insulation Voltage: 690 V AC

• Rated Operational Voltage: 400 V AC

• Short-Circuit Withstand: 10 kA

• Poles: 4

• Operation Method: Manual rotary operation

• Mechanical Life: ≥ 10,000 operations

• Operating Temperature: -25 ℃ to +60 ℃

• Degree of Protection: IP20

• Mounting: Panel or base mount

• Certifications: CE, UL, IEC 60947-3

• Dimensions (Approx.): H 200 mm × W 100 mm × D 90 mm

3. Advantages & Features

1. High Rated Current & Short-Circuit Capability
   Supports 125 A current and 10 kA short-circuit capacity for industrial power system safety.

2. Safe Isolation Function
   Manual operation disconnects the circuit for maintenance, enhancing personnel safety.

3. Modular Design
   Compact structure facilitates installation and replacement, improving system flexibility.

4. High Reliability
   Industrial-grade design, vibration-resistant, heat-tolerant, long-term stable operation.

5. Easy Operation
   Manual rotary lever for intuitive operation, allowing quick switching between ON and OFF.

6. Wide Application
   Suitable for industrial distribution panels, motor control systems, machinery, and municipal facility electrical isolation.

4. Application Areas

The ABB OT125A4 Switch Disconnector is widely used in:

• Industrial distribution systems

• Motor control cabinets and protection systems

• Machinery manufacturing and production line equipment

• Building and municipal facility electrical isolation

• Fans, pumping stations, and compressors

5. Notes & Precautions

1. Ensure power is disconnected before installation to avoid electrical hazards.

2. Switching operation should comply with rated current and voltage to prevent switch damage.

3. Maintain a dry, ventilated environment, avoiding dust, moisture, and corrosive gases.

4. Regularly inspect terminals and mechanical operation mechanism for long-term reliability.

5. Installation, commissioning, and maintenance should be performed by qualified electrical engineers.

6. Avoid long-term operation in strong electromagnetic interference environments; shielding may be required.