WOODWARD BU1AC110 AC Voltage Relay

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WOODWARD BU1AC110 AC Voltage Relay

• Rated Parameters
  • Rated Voltage: 110 V AC.
  • Rated Frequency: 45-66 Hz.
• Functional Characteristics
  • Over/Undervoltage Supervision: Capable of separately adjusting pickup values for overvoltage and undervoltage protection. During three-phase monitoring, overvoltage detection evaluates the highest phase voltage, while undervoltage detection focuses on the lowest one. When the voltage drops below 60% of the rated voltage, the trip occurs without delay.
  • Hysteresis Setting: The hysteresis can be set to 2%, 4%, 6%, 8%, or 10% as needed.
  • Trip Delay: It has a common trip delay setting for overvoltage and undervoltage protection, a dropout time of 300 ms, and a minimum operating delay of 300 ms.
  • Output Relay: Features two output relays to execute protection commands or send alarm signals.
• Other Features
  • Self-Powered: The device uses the measured voltage for power supply, eliminating the need for an additional auxiliary voltage.
  • LED Indication: LEDs are used to display the overvoltage, undervoltage, and trip statuses. For example, the overvoltage LED stays steadily lit when tripping due to overvoltage, and the undervoltage LED goes out when tripping because of undervoltage.
  • DIN Rail Mounting: Can be installed on a DIN rail according to the DIN EN 50022 standard. Its front cover is equipped with a sealable transparent cover, reaching an IP40 protection level.
  • Operating Temperature: Ranging from -25°C to 70°C.
• Other Specifications
  • Power Consumption: 3.5 VA.
  • Thermal Load Capacity: The thermal load carrying capacity of the voltage circuit is constantly 1.3 times the rated voltage.
  • Weight: Approximately 0.5 kg.

The structure and details of the product：

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