Siemens 3WA9111-0AE07 380-415 V AC Under Voltage Release

The Siemens 3WA9111-0AE07 380-415 V AC Under Voltage Release is a protective device commonly used in electrical systems to ensure the safe and controlled operation of electrical equipment. It is typically associated with circuit breakers or motor control devices.

The primary function of an under voltage release is to monitor the voltage level of the electrical system and prevent the automatic re-energization of the equipment when the voltage drops below a predetermined threshold. When the voltage falls below this threshold, the under voltage release de-energizes the equipment and prevents it from automatically restarting when the voltage is restored.

Here are some key points about under voltage releases:

1. Voltage Monitoring: The under voltage release continuously monitors the voltage level of the electrical system. It typically measures the voltage across the main power supply lines or is connected to an auxiliary power supply.

2. Threshold Setting: The under voltage release is set to a specific voltage threshold or range. When the voltage drops below this threshold, it triggers the release mechanism, causing the equipment to de-energize.

3. Release Mechanism: The under voltage release is connected to the tripping mechanism of the circuit breaker or motor control device. When the release is activated due to a low voltage condition, it causes the tripping mechanism to operate, opening the circuit and disconnecting the power supply to the equipment.

The under voltage release plays a crucial role in preventing uncontrolled re-energization of the equipment. In situations such as power outages or voltage drops, it ensures that the equipment remains de-energized until the voltage is restored to a safe and stable level.

Under voltage releases are commonly used in applications such as motor control centers, industrial machinery, and critical electrical systems where uncontrolled equipment re-energization can pose safety hazards or damage equipment. They provide an additional layer of protection and help maintain the integrity of the electrical system.

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