How to charging and closing the circuit breaker.

To safely close a circuit breaker, the operating mechanism's springs must be charged. These springs store the energy required to close the main contacts.

🔋 Charging the Springs

There are two methods to charge the springs:

1. Manual Charging
Use the charging handle and pull it down six times until you hear a distinct “clack” sound.

This indicates the springs are fully charged.

2. Motor Charging (Optional)
If equipped, the MCH gear motor automatically charges the springs.

🔍 Charge Status Indicator
The breaker will display one of the following:

• Charged OK – Springs are fully charged and ready.
• Half Charged / Not OK – May indicate phase protection is active or auxiliary circuits are not yet ready.

✅ Conditions Required to Close the Breaker

The circuit breaker can only be closed when it is “ready to close.” This means:

• The breaker is in the OFF position.
• The springs are fully charged.
• There is no active opening command.

If the breaker is not ready when a closing command is issued: ➤ Cancel the command and retry once the breaker shows “ready to close.”

⚙️ Closing the Circuit Breaker

Local Mechanical Closing
➤ Press the mechanical ON pushbutton located on the breaker.

📊 Recommended Visuals

To improve clarity, consider adding:

• Spring Charging Diagram – Manual vs. motor charging.
• Status Indicator Visuals – Showing “Charged OK” and “Not OK.”
• Flowchart – Steps from charging to closing the breaker.

Released for: Schneider Electric Thailand