SPAJ140C Overcurrent and earth-fault relay ABB

Description

Overview

Essential details：SPAJ140C Overcurrent and earth-fault relay ABB

Features Three-phase, low-set phase overcurrent unit with definite time or inverse definite minimum time (IDMT) characteristic Three-phase, high-set phase overcurrent unit with instantaneous or definite time function Low-set, non-directional earth-fault unit with definite time or inverse definite minimum time (IDMT) characteristic
High-set, non-directional earth-fault unit with instantaneous or definite time function Built-in breaker failure protection function
Two heavy-duty and four light-duty output relays with field-selectable configuration
Extensive data communication capabilities over built-in serial port
Outstanding design flexibility for easy selection of appropriate operation schemes for different applications
Numerical display of setting values, measured values, memorized fault values, fault codes etc.
Enhanced system reliability and availability due to continuous hardware and software self-supervision with auto-diagnosis
Powerful software support for setting and parametrizing of the relay and for recording of relay parameters with a portable PC.

SPAJ140C-AA

The combined overcurrent and earth-fault relay SPAJ 140 C is intended to be used for the selective short-circuit and earth-fault protection of radial feeders in solidly earthed, resistanc earthed or impedance earthed power systems.
The integrated protection relay includes a phase overcurrent unit and an earth-fault unit with flexible tripping and signalling facilities. The overcurrent and earth-fault relays can also be
used inother applications requiring single-, twoor three-phase overcurrent protection and nondirectional earth-fault protection. The combined overcurrent and earth-fault relay also features circuit breaker failure protection.

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