Description
ABB SPAJ110C
Technical Specifications:
- Model: SPAJ110C.
- Protection Functions: Phase and earth overcurrent, thermal overload.
- System: ABB SPACOM Relay Series.
Functional Features:
- Definite and Inverse Time Curves: Programmable protection characteristics for optimal coordination.
- Event Recording: High-resolution fault recording for post-event analysis.
- Local Indication: Clear LED indicators and display for local status monitoring.
Application Scenarios:
Widely used in utility substations, industrial power distribution, and commercial building electrical systems.
Performance Parameters:
- Accuracy: High-precision current measurement for reliable fault detection.
- Speed: Fast tripping times for high-magnitude faults.
Material Composition:
Robust metal enclosure with EMI shielding and high-quality solid-state components.
Structural Features:
Standard rack or flush-mount form factor with front-panel keypad and display.
Working Principle:
Continuously samples phase and neutral currents, comparing them against configured protection thresholds. Upon detecting a fault condition, it issues a trip command to the circuit breaker.
Installation Requirements:
Connect CTs with correct polarity. Ensure proper grounding of the relay chassis.
Usage Precautions:
Never open the CT secondary circuit while energized. Perform secondary injection testing to verify protection settings before commissioning.
