Product Overview
The SPAU 140C is a specialized voltage and synchronization relay protector designed for sophisticated power distribution and generation systems. As a critical component in the ABB SPACOM product family, the SPAU 140C executes high-precision monitoring of phase-to-phase voltages and frequency synchronization between independent power networks. It is primarily utilized in automatic or manual synchronization of generators to a grid or for the interconnection of two separate busbar sections. By providing precise check-synchronization (25) and overvoltage/undervoltage protection functions, this relay ensures that breakers are only closed when voltage, frequency, and phase angle differences are within safe operational limits, preventing catastrophic mechanical stress on rotating machinery and electrical transients.
Detailed Technical Specifications
| Feature | Specification |
| Manufacturer | ABB |
| Model Number | SPAU 140C |
| Order Code | SPAU-140-C |
| Product Type | Combined Overvoltage, Undervoltage & Synchro-check Relay |
| Rated Frequency | 50/60 Hz (Configurable) |
| Rated Voltage Un | 100 V, 110 V, 115 V, or 200 V (Dependent on input terminals) |
| Measuring Range | 0.0 to 1.6 x Un |
| Synchronization | Check-synch with adjustable phase angle and voltage difference |
| Communication | SPA bus serial interface (RS-485) |
| Isolation | 2.0 kV, 50 Hz, 1 min (Inputs, outputs, and power supply) |
| Operating Temp | -10 °C to +55 °C |
| Dimensions | 175 mm x 150 mm x 220 mm (Panel mount) |
| Product Weight | 5.44 kg (11.99 lbs) |
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Guide
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