SE-330AU-24-01

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Protection Relays & Systems provide a reliable, effective method of preventing electrical equipment from malfunctioning, damaging, or experiencing dangerous conditions. The SE-330AU-24-01 is a protection relay used for protection of motor overcurrent, backup overload, undervoltage and short-circuit protection. It is designed for use in three-phase AC power networks.

The SE-330AU-24-01 consists of a three-phase electromechanical relay and a galvanically isolated logic module. It is activated by measuring the current flowing in the load via primary CTs (current transformers). The Overcurrent protection mode is meant for motor overload and will immediately shut off the motor when the current exceeds the preset limit. Backup overload protection mode will also shut off the motor when the preset limit is exceeded, but with a shorter delay compared to the Overcurrent protection.

Undervoltage protection mode constantly monitors the voltage to ensure the motor does not receive too low of a voltage. When the undervoltage limit is exceeded, the relay will shut off the motor. Short-circuit protection mode is meant for protecting the electrical equipment from dangerous conditions which can occur when the load is short-circuited. The relay will immediately shut off the motor when it detects too high of a current, preventing the motor from suffering from excessive heat.

The SE-330AU-24-01 is designed for use in industrial machines, manufacturing plants, substations and other applications where three-phase AC protection is required. Its small size and ease of installation make it suitable for a wide range of applications, from small motor control to large substations. The protection modes provide the reliable protection needed to keep the equipment running safely and efficiently.

The SE-330AU-24-01 works on the principle of three-phase comparator circuit. This circuit continuously compares the phase currents and produces an output signal when the difference between any of the currents exceeds the preset limit. This signal triggers the logic module, which in turn shuts off the motor if the preset limit is exceeded. The relay also uses overcurrent detection, undervoltage detection, and open/closed circuit detection to provide the necessary protection.

The SE-330AU-24-01 is a reliable and efficient way to ensure the safety of electrical equipment in a variety of applications. It is designed to provide protection for motor overload, backup overload, undervoltage, and short-circuit protection, ensuring the motor is safe from dangerous conditions. With its small size and ease of installation, it is a useful tool for protecting equipment from potentially hazardous conditions that could lead to costly or even disastrous consequences.

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