ABB SPAJ140C / SPAJ1 140 C Overcurrent & Earth Fault Relay – Product Description

Overview

The ABB SPAJ140C is a combined overcurrent and earth-fault relay from ABB’s SPACOM family. It protects medium-voltage feeders by detecting overcurrent and ground faults and tripping circuit breakers promptly. Moreover, it features advanced self-supervision, fault recording, and digital display functions, ensuring reliable operation in demanding industrial environments.

Technical Specifications

• Model: SPAJ140C

• Type: Overcurrent and Earth-Fault Relay

• System Compatibility: ABB SPACOM family

• Rated Frequency: 50 / 60 Hz

• Rated Current (In): 1 A or 5 A (selectable via CTs)

• Auxiliary Supply Voltage: 80–265 V AC / 18–80 V DC

• Protection Functions: Overcurrent (definite/inverse time), Earth-fault (instantaneous/time-delayed), Breaker failure

• Display: Digital display for settings and fault records

• Communication: Serial port (optional fiber optic interface)

• Operating Temperature: –10 °C to +55 °C

• Storage Temperature: –40 °C to +85 °C

• Mounting: Panel-mounted

• Dimensions (W × H × D): ~220 × 150 × 200 mm

• Weight: 3.5 kg

• Certifications: CE compliant

• Country of Origin: Finland / Sweden

• Application Areas: Feeder protection, radial distribution networks, industrial substations

FAQ

Q: What is the primary function of the SPAJ140C relay?
A: It provides overcurrent and earth-fault protection for medium-voltage feeders.

Q: Which ABB family does it belong to?
A: SPAJ140C is part of the ABB SPACOM relay family.

Q: What types of protection are available?
A: Overcurrent (definite/inverse), earth-fault (instantaneous/time-delayed), and breaker failure protection.

Q: How is the relay mounted?
A: The relay is designed for panel-mounted installation in industrial control systems.

Q: Which industries typically use this relay?
A: Power generation, industrial substations, chemical plants, and medium-voltage distribution networks.