Description
The ABB SPAD346C3 is a sophisticated numerical feeder protection relay designed for the protection of distribution networks. It integrates multi-stage overcurrent and earth-fault protection functions into a single, compact unit to ensure high-speed fault clearance and system stability.
Technical Parameters
- Model Number: SPAD346C3
- Rated Frequency: 50/60 Hz
- Auxiliary Voltage: 80–265 V AC/DC (Standard C3 variant)
- Current Input (In): 1A / 5A (Selectable)
- Trip Stages: Low-set and high-set stages for both phase and earth-faults
- Communication: SPA bus protocol interface
Product Specifications
- Mounting: Flush-mount or semi-flush panel mounting
- Enclosure: IP54 (Front panel) / IP20 (Rear terminals)
- Response Time: < 40 ms (High-set stage)
- Display: 4-digit LED display for settings and fault values
- Dimensions: 144mm x 144mm (Standard square cutout)
- Weight: 3.2 kg
Application Fields
- Medium Voltage (MV) Distribution Substations
- Industrial Plant Power Distribution Protection
- Backup Protection for High-Voltage Feeders
- Transformer and Motor Feeder Guarding
Product Q&A
- Q: What does the “C3” suffix signify in the part number?
- A: It typically indicates the specific auxiliary supply voltage range, specifically the wide-range 80–265 V AC/DC version.
- Q: Can the relay record fault data?
- A: Yes, it stores the latest fault current values and indicators to assist technicians in post-fault analysis.
- Q: Is it possible to test the relay without primary current?
- A: Yes, the unit includes a built-in “Trip Test” function to verify the integrity of the output relays and wiring.
