ABB SPAJ 140 C Overcurrent & Earth-fault Relay 50/60Hz

The ABB SPAJ 140 C is a relay that protects against both overcurrent and earth faults. It is meant for use in medium-voltage distribution systems and provides reliable and versatile protection for radial feeders and other electrical facilities. ​

Specifications:

Model: SPAJ 140 C

Brand: ABB

Type of protection: overcurrent and earth fault

Rated Frequency: 50/60 Hz

Rated Current: Choose 1 A or 5 A ​

Auxiliary Supply: 18–80 V DC or 80–265 V AC ​

Stages of Protection:

2 × Phase Overcurrent (I, I²)

2 × Earth-fault (Io, Io²) ​

Operation: A specific time or an inverse definite minimum time (IDMT) for both overcurrent and earth-fault units ​

Output Relays: There are two heavy-duty trip relays and four signal relays for signaling and tripping.

Display: A numerical display for settings, measured values, fault data, and diagnostic codes ​

Self-Supervision: Hardware and software that are always on self-monitoring with automatic diagnosis ​

Communication: A built-in serial port for sending and receiving data and keeping an eye on things from afar ​

Level of protection: IP54 (case made of aluminum) ​

Uses: protecting feeders, transformers, backups, power utilities, industries, maritime and offshore installations

Features:

• A simple relay with all the necessary features for protecting against overcurrent and earth faults ​
• Proven technology with flexible tripping and signaling options ​
• Included is protection against circuit breaker failure
• Access to settings, fault data, and diagnostics from both near and far ​
• Very resistant to electrical and electromagnetic interference ​

Category:

Category: Protection Relays / Overcurrent & Earth-fault Relays

Brand: ABB

This relay is used a lot in industrial, maritime, and utility settings to protect electrical systems in a dependable and selective way.