ABB 0T25ET3 Non-fused disconnect switch

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1. Product Overview

The ABB 0T25ET3 is a high-performance Non-fused Disconnect Switch designed for industrial and commercial power systems to safely isolate and switch circuits. It is intended for three-phase systems and can be operated manually, ensuring complete disconnection of circuits during maintenance or inspection to protect equipment and personnel. The 0T25ET3 features a compact design and easy operation, suitable for distribution boards, switch cabinets, and industrial equipment.

2. Technical Specifications

• Model: 0T25ET3

• Product Type: Non-fused Disconnect Switch

• Rated Current: 25 A

• Rated Voltage: 690 V AC

• Poles: 3P (three-pole)

• Short-circuit Breaking Capacity: 10 kA (according to specification)

• Operation: Manual lever or knob

• Mounting: Panel or rail mounting

• Degree of Protection: IP20

• Operating Temperature: -25 ℃ to +60 ℃

• Dimensions (Approx.): H 120 mm × W 75 mm × D 80 mm

• Standards Compliance: IEC/EN 60947-3

• Functional Features: Provides safe circuit isolation without fuse protection

3. Advantages & Features

1. High Safety
   Fully disconnects the circuit, ensuring personnel safety during maintenance and inspection.

2. Compact Design
   Saves space, suitable for installation in distribution and control cabinets.

3. Easy Operation
   Manual lever or knob allows simple switching and isolation.

4. Durable
   Industrial-grade construction suitable for long-term use, resistant to mechanical wear.

5. Reliable Circuit Isolation
   Provides reliable three-pole disconnection for complete circuit isolation during maintenance.

6. Standard Compatibility
   Compliant with IEC/EN 60947-3, suitable for global industrial applications.

4. Application Areas

The ABB 0T25ET3 non-fused disconnect switch is widely used in:

• Industrial power distribution systems

• Machinery control cabinets

• Power control and monitoring systems

• Motor start/stop control

• Factory and commercial building electrical systems

• Internal isolation in switchboards and distribution cabinets

5. Notes & Precautions

1. Ensure the power supply is disconnected before installation, maintenance, or operation.

2. Only qualified personnel should install and operate the disconnect switch.

3. Equipment rated current and voltage must comply with switch specifications.

4. Avoid long-term use in high humidity, dusty, or strong electromagnetic interference environments.

5. Regularly inspect the switch’s mechanical and electrical connections to ensure reliability.

6. Follow standard wiring and grounding requirements during installation to ensure safety.