Product Description

The SPAU330 C1-AA (Model: SPAU330 C1-AA) is a high-performance microprocessor-based numerical relay from the legacy SPACOM family. This versatile unit is engineered for the protection of feeders, power transformers, and busbars within 6–36 kV medium-voltage distribution networks. The SPAU330 C1-AA (Order Number: SPAU330 C1-AA) integrates multiple protective functions, including directional and non-directional earth-fault detection and overcurrent protection, ensuring deterministic stability in complex electrical grids.

Equipped with the "AA" hardware configuration, this specific version is optimized for 50Hz systems and features a wide-range auxiliary power supply (80–265 V DC/AC). The SPAU330 C1-AA maintains signal integrity through continuous self-diagnostics and integrated disturbance logging, capturing critical fault data for post-event analysis. Its compact panel-mount design facilitates easy integration into existing relay cabinets, supporting the SPA bus protocol for seamless communication with SCADA and DCS environments.

Technical Specifications

• Manufacturer: ABB Group

• Model Number: SPAU330 C1-AA

• ABB Type Designation: Voltage / Earth-Fault Relay

• Series Platform: SPACOM Family

• System Frequency: 50 Hz (AA configuration)

• Auxiliary Supply Voltage: 80–265 V DC/AC

• Primary Functions: Directional/Non-directional Earth-fault, Overcurrent, and Voltage monitoring

• System Voltage Compatibility: 6–36 kV Distribution networks

• Inputs: High-precision Current Transformer (CT) and Voltage Transformer (VT) inputs

• Outputs: Heavy-duty relay contacts for trip and alarm signaling

• Communication Interface: RS-485 via SPA bus protocol

• Operating Temperature: -10°C to +55°C

• Protection Rating: IP20 (Cabinet mounted)

• Dimensions: 220 mm x 150 mm x 60 mm

• Net Weight: 2 kg (Note: Shipping weight varies by packaging)

• Country of Origin: Finland / Sweden