SPAU140C ABB Protection Relay

ABB SPAU140C Concise Technical Specification
Basic Information
Brand: ABB
Model: SPAU140C
Product Name: Numerical Synchro-Check Protection Relay
Origin: Finland
HS Code: 85372090
Dimension: 145mm × 145mm × 100mm
Net Weight: 0.8kg

Electrical & Environmental Parameters
Auxiliary power supply: 18–80VDC / 80–265VAC dual-range input
Rated voltage sampling: 100V / 110V PT secondary voltage, burden less than 0.5VA
Frequency range: 45Hz to 65Hz, compatible with 50Hz and 60Hz power grids
Output relay contacts: 250VAC/DC rated, continuous carrying current 5A
Operating temperature: -20°C ~ +70°C; storage temperature: -40°C ~ +85°C
Humidity: 5%–95% non-condensing
Protection grade: Front IP52, rear IP20 for cabinet panel mounting
Certifications: CE, IEC 60255, UL industrial power system compliance
Core Product Characteristics
Dual independent measurement channels to control two separate circuit breakers simultaneously; fully adjustable thresholds for voltage deviation, phase angle offset and frequency slip with high resolution; built-in continuous hardware and software self-diagnosis to detect wire open-circuit, short-circuit and internal faults with front LED status indicators; conformal coated circuit board to resist dust, moisture and corrosive flue gas in power plant environments; compact square panel mounting design without extra rack accessories; two working modes including continuous supervision and momentary synchro check; standard RS485 communication interface for data upload to SCADA and DCS systems; fail-safe logic blocks breaker closing command once hardware failure or signal loss occurs.
Wiring Instruction
Embed the relay into standard cabinet cut-out and lock with mounting fasteners. Connect PT voltage sampling cables to front measurement terminals with shielded twisted wires, single-point ground all shielding layers on cabinet earth bar. Link auxiliary DC/AC power supply to dedicated power terminals, connect relay trip/alarm output contacts to circuit breaker control loops. Separate high-power primary wiring and weak signal sensing cables to eliminate electromagnetic crosstalk.