ABB SPAJ 141 C - Characteristics and Application; Application Overview

2
1MRS 750872-MUM EN
Issued 97-10-13
Version A (replaces 34 SPAJ 17 EN1)
Checked
Approved
Data subject to change without notice
Station
Automation
SPAJ 141 C
Combined overcurrent
and earth-fault relay
Contents Characteristics ................................................................................................................ 2
Application.....................................................................................................................2
Description of operation................................................................................................. 3
Connection diagram....................................................................................................... 4
Connections ................................................................................................................... 6
Control signals between the modules.............................................................................. 7
Signal abbreviations used................................................................................................ 7
Operation indicators....................................................................................................... 8
Power supply and output relay module........................................................................... 9
Technical data............................................................................................................... 10
Maintenance and repairs............................................................................................... 13
Spare parts .................................................................................................................... 13
Dimensions and instructions for mounting .................................................................. 14
Ordering information................................................................................................... 15
The complete manual for the relay SPAJ 141 C contains the following partial manuals:
General relay description 1MRS 750872-MUM EN
General characteristics of D-type relay modules 1MRS 750066-MUM EN
Combined overcurrent and earth-fault module SPCJ 4D24 1MRS 750121-MUM EN
Characteristics
Three-phase low-set overcurrent unit with defi-
nite time or inverse definite minimum time
(IDMT) characteristic.
Three-phase high-set overcurrent unit with in-
stantaneous or definite time function.
Low-set sensitive, non-directional earth-fault
protection with definite time characteristic.
High-set non-directional earth-fault protection
with instantaneous or definite time function.
Built-in breaker failure protection scheme.
Fully field-selectable output relay configuration.
Extensive data communication capabilities over
built-in serial port.
Outstanding design flexibility for easy selection
of appropriate operation schemes for various
applications.
Numerical display of setting values, current
measured values, memorized fault values etc.
Continuous self-supervision with auto-diagno-
sis of internal faults.
Application
The combined overcurrent and earth-fault relay
SPAJ 141 C is intended to be used for the selec-
tive short-circuit and earth-fault protection of
radial feeders in resistance earthed or impedance
earthed power systems. The integrated protec-
tive relay comprises both an overcurrent unit and
an earth-fault unit with highly flexible tripping
and signalling facilities. The feeder protection can
be used in applications requiring a single-, two-
or three-phase overcurrent protection and a non-
directional earth-fault protection. The overcur-
rent and earth-fault relay also comprises a circuit
breaker failure protection.