Outline three conditions that must be met before a machine can be synchronized with the supply voltage.

1. The machine must be properly connected to the power supply, ensuring that all electrical connections are secure and in good condition.

2. The machine must be in good working order, with all components functioning correctly and no damage or malfunctions that could interfere with synchronization.

3. The machine must be properly configured and set up to match the voltage and frequency of the supply, ensuring that it can effectively and safely operate in sync with the power source.

1. The machine's terminal voltage must be equal to the supply voltage. This condition ensures that the machine is generating the same voltage as the supply, and that it is therefore in phase with the supply.
2. The machine's frequency must be equal to the supply frequency. This condition ensures that the machine is rotating at the same speed as the supply, and that it is therefore not slipping or lagging behind.
3. The machine's phase sequence must match the supply phase sequence. This condition ensures that the machine is connected to the supply in the correct order, and that the phases are not reversed.