SACE°Tmax° XT "How to" Series

Convert from Fixed to Withdrawable Breaker

This guide explains the step-by-step procedure to convert a SACE°Tmax° XT fixed circuit breaker into a withdrawable version safely and efficiently.

Important Safety Notes

1. Always disconnect power before starting any maintenance or conversion.

2. Wear appropriate personal protective equipment (PPE).

3. Follow local electrical codes and safety standards.

4. Only trained personnel should perform this procedure.

Tools and Equipment Needed

• Screwdrivers (flathead and Phillips)

• Torque wrench

• Retaining pins and brackets (provided with withdrawable kit)

• Lifting device (if required for larger breakers)

Step 1: Prepare the Fixed Breaker

1. Turn off and isolate the panel supplying the breaker.

2. Verify the breaker is de-energized using a proper voltage tester.

3. Remove the breaker from the fixed mounting position by unscrewing the fastening screws.

Step 2: Inspect the Breaker

1. Check the breaker for any damage or wear.

2. Ensure the frame is compatible with the withdrawable conversion kit.

3. Clean all contact surfaces to ensure reliable electrical connections.

Step 3: Install the Withdrawable Conversion Kit

1. Attach the withdrawable frame brackets to the breaker according to the manufacturer’s instructions.

2. Insert the retaining pins to secure the breaker in the withdrawable frame.

3. Verify that the moving parts (handles, rails, latches) operate smoothly.

Step 4: Mount the Breaker in the Withdrawable Configuration

1. Align the withdrawable breaker assembly with the panel rails.

2. Slide the breaker fully into position until it locks in place.

3. Test the withdrawal mechanism to ensure the breaker can be removed safely without disturbing other components.

Step 5: Test and Commission

1. Perform insulation and continuity checks before energizing.

2. Operate the breaker manually to ensure smooth engagement and disengagement.

3. Re-energize the panel and perform functional tests to confirm proper operation.

Tips and Recommendations

• Label the breaker as “Withdrawable” for future maintenance clarity.

• Periodically inspect the withdrawal mechanism for wear and lubrication.

• Keep the conversion kit instructions and components accessible for future reference.