Table Of Contents - ABB SPAJ 142 C User Manual And Technical Description

1MRS 750873-MUM EN
Issued 1997-10-14
Modified 2002-04-24
Version B (replaces 34 SPAJ 18 EN1)
Checked MK
Approved OL
Data subject to change without notice
Contents
Characteristics
Application
2
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 (modified 2002-04) ................................................................................ 10
Maintenance and repairs ............................................................................................... 13
Spare parts .................................................................................................................... 13
Dimensions and instructions for mounting .................................................................. 14
Ordering information ................................................................................................... 15
The complete manual for the relay SPAJ 142 C contains the following partial manuals:
General relay description
General characteristics of D-type relay modules
Combined overcurrent and earth-fault module SPCJ 4D29
Three-phase low-set overcurrent unit with defi-
nite time or inverse time (IDMT) characteristic.
Three-phase high-set overcurrent unit with in-
stantaneous or definite time function.
Low-set non-directional earth-fault protection
with definite time or inverse time (IDMT) char-
acteristic.
High-set non-directional earth-fault protection
with instantaneous or definite time function.
Built-in breaker failure protection scheme.
The combined overcurrent and earth-fault re-
lay SPAJ 142 C is intended to be used for the
selective short-circuit and earth-fault protection
of radial feeders in solidly earthed, resistance
earthed or impedance earthed power systems.
The integrated protective relay comprises both
an overcurrent unit and an earth-fault unit with
SPAJ 142 C
Combined overcurrent
and earth-fault relay
1MRS 750873-MUM EN
1MRS 750066-MUM EN
1MRS 750119-MUM EN
Fully selectable output relay configuration.
Extensive data communication facilities over
serial port.
Outstanding design flexibility for easy selection
of appropriate operational scheme for various
applications.
Numerical display of setting values, current
measured values, memorized fault values etc.
Continuous selfsupervision with autodiagnosis
for internal faults.
highly flexible tripping and signalling facilities.
The feeder protection can be used in applications
requiring a single-, two- or three-phase over-
current protection and a non-directional earth-
fault protection. The overcurrent and earth-fault
relay also comprises a circuit breaker failure pro-
tection.