Description
The ABB SPAU130C-AA is a secondary numerical, microprocessor-based protection relay designed for overvoltage and undervoltage monitoring in electrical power distribution networks, generators, and large motors. Operating within the SPACOM system family, this unit continuously measures the phase-to-phase or phase-to-neutral voltages of the protected system. The “AA” suffix indicates a specific combination of auxiliary power supply rating, nominal input configuration, and discrete output relay contact layouts.
Commercial Availability & Procurement
- Condition: New Surplus (Factory Sealed) / Refurbished (Fully injection-bench tested and certified)
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- Warranty: 12-Month Mechanical and Electrical Performance Warranty
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- Availability: In Stock (Ready for global diagnostic dispatch within 24–48 hours)
- Pricing Note: Catalog prices are indicative only. Rates vary based on current global inventory pools and custom programming/calibration requirements. Contact our technical distribution desk for a firm, written quote.
Technical Specifications
| Parameter | Value / Specification |
|---|---|
| Brand / Manufacturer | ABB Power Automation |
| Model Code | SPAU 130 C-AA (Utilizing module plug-in unit type SPTU 243 51 B) |
| Nominal Voltage (Un) | 100 V, 110 V, or 120 V AC internal settings (Software selectable) |
| Nominal Frequency (fn) | 50 Hz / 60 Hz system adaptive |
| Auxiliary Supply (Uaux) | AA Variant: 80 to 265 V AC / V DC power section range |
| Overvoltage Stages | Definite-time low-set (U>) and high-set (U>>) elements |
| Undervoltage Stages | Definite-time low-set (U<) and high-set (U<<) elements |
| Dielectric Test Voltage | 2.0 kV RMS, 50 Hz for 1 minute (IEC 255-5 compliance) |
| Impulse Test Voltage | 5 kV, 1.2/50 µs, 0.5 J (IEC 255-5 compliance) |
| Serial Bus Protocol | SPA bus interface (Plastic or glass fiber optic variant adapters) |
| Operating Temperature | −10 to +55°C (+14 to +131°F) |
Protection Mechanics & Logic
The SPAU130C-AA utilizes standard internal programming blocks to execute protective tripping matrix paths based on continuous true RMS sampling of inputs:
- Low-Set Overvoltage Stage (U>): Tracks sustained overvoltages. Features a programmable start value ranging from 0.8 to 1.6 × Un and an adjustable operation delay time of 0.05 to 300 seconds.
- High-Set Overvoltage Stage (U>>): Tracks severe transient overvoltage faults. Features a programmable start value ranging from 1.0 to 2.0 × Un and an operating time of 0.05 to 30 seconds.
- Undervoltage Stages (U</U<<): Tracks supply drops, drop-outs, and utility grid faults. The low-set element (U<) is adjustable down to 0.2 × Un. It features a definite-time delay loop or an inverse time-delay characteristic profile to coordinate downstream load shedding.
Field Configuration & Maintenance Constraints
When applying the SPAU130C-AA inside an engineering modification project or legacy retrofit panel, engineers must address specific operational constraints:
- DIP Switch Parameter Tuning: Before deploying the relay into an active circuit, configure the internal DIP switches located on the front edge of the plug-in module card. These control critical system defaults, including the enabling/disabling of the automatic undervoltage trip suppression feature when all phases drop under 0.15 × Un (which prevents nuisance tripping during standard system shutdowns).
- Fiber Optic SPA Bus Link: When integrating this relay into a central SCADA network via the SPA protocol, use a matching SPA-ZC 17 or SPA-ZC 21 bus connection module. Ensure the plastic or glass fiber core diameter parameters exactly match the transceivers to prevent packet transmission errors.
- Hot-Swapping Precaution: The SPAU130C-AA features a drawing handle mechanism that automatically shorts internal VT transformer secondary circuits when pulled. However, do not hot-swap the internal processing module while the system auxiliary control power network (Uaux) is energized. This prevents internal inductive spikes from damaging the non-volatile memory chips.> Field Engineering Note: During routine testing with a secondary injection test set, check that the measurement inputs are configured for either delta connection or star connection. Feeding line-to-line voltages into an entry channel configured for line-to-neutral values will cause incorrect measurement calculations, resulting in immediate overvoltage tripping.
