ABB SPAU 330 C Voltage Relay

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1. Product Overview

The ABB SPAU 330 C Voltage Relay is a voltage monitoring and protection relay designed for industrial and utility power distribution systems. It continuously supervises overvoltage, undervoltage, and residual voltage conditions on three-phase busbars. The relay enhances substation and distribution network reliability by providing early detection, alarm outputs, and control signals in case of voltage abnormalities. It is part of ABB’s SPACOM relay family for automation and protection applications.library.e.abb.com+1

2. Main Technical Specifications

• Manufacturer: ABB

• Model: SPAU 330 C

• Product Type: Voltage Monitoring & Protection Relay

• Functions: Overvoltage, Undervoltage, Residual Voltage Supervision

• Input Measurement: Three-phase phase-to-phase and residual voltage

• Output Contacts: Multiple relay outputs for alarms, trip control, etc.

• Auxiliary Supply: Configurable AC/DC auxiliary voltage range

• Display & Operation: Local numeric display for settings and measured values

• Self-Supervision: Continuous internal hardware/software self-check

• Protection Level: Rugged housing with IP54 degree of protection

• Communication: Optional serial/fiber-optic communication interfaces supported

• Installation: Panel or substation relay rack mounting

• Standards: Designed per applicable protective relay standardslibrary.e.abb.com

3. Advantages and Features

1. Comprehensive Voltage Protection
   Monitors overvoltage, undervoltage, and residual voltage to protect equipment and systems.library.e.abb.com

2. High Reliability with Self-Diagnostics
   Continuous internal supervision and auto-diagnosis enhance reliability and availability.library.e.abb.com

3. Flexible Configuration
   Programmable settings and output configuration allow adaptation to various system requirements.library.e.abb.com

4. Clear Local Display
   Front panel shows real-time voltage values, setpoints, and event records for easy site verification.library.e.abb.com

5. Robust and Interference-Resistant
   Designed to operate reliably in harsh electrical and electromagnetic environments.library.e.abb.com

4. Typical Applications

• Substation busbar voltage supervision and protection

• Protection of transformers, motors, capacitor banks

• Integration with SCADA/DCS for voltage monitoring

• Distribution network fault recording and event analysis

• Industrial power distribution control and automationlibrary.e.abb.com

5. Installation and Operation Notes

1. Match Voltage Ranges: Ensure relay settings match the measured voltage levels in the application.

2. Correct Wiring: Follow wiring diagrams and tighten connections to avoid measurement errors.

3. Auxiliary Power Supply: Provide stable auxiliary supply within specified range to ensure accurate operation.

4. Environmental Considerations: Install in dry, clean environments to avoid dust or moisture ingress.

5. Routine Testing: Verify relay outputs and alarm/trip responses during periodic maintenance.

The structure and details of the product：

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