ABB SPAC 531 C User Manual And Technical Description page 5

Description of
function
Design
The feeder terminal SPAC 531 C is housed in a
19 inch subrack of Europe size, height 3U (~133
mm) and the feeder terminal SPAC 631 C is
housed in a half of a full width 19 inch subrack,
height 6U (~266mm). The rear of the subrack is
provided with an extension part of galvanized
steel sheet.
Module
Overcurrent relay module
SPCJ 3C3
Directional neutral current
module SPCS 3C4
Control module SPTO 6D3
I/O module SPTR 4D1 or
SPTR 4D2 (3 pcs)
I/O module SPTR 6B11
Power supply module
SPGU 240A1 or SPGU 48B2
Energizing input module
SPTE 8C3 (SPAC 531 C)
SPTE 8C4 (SPAC 631 C)
The standard subrack is made of anodized alu-
minium section and includes nine operation
modules. In addition, three alternative optional
measuring modules are available.
The functions of the standard modules are ex-
plained in the table below.
Function
Three-phase, two-stage overcurrent protection.
Measures, records and indicates the three phase currents locally
and transmits the data to the remote control system.
Directional two-stage earth-fault protection.
Measures, records and indicates neutral current and residual
voltage locally and transmits the data to the remote control
system.
Reads and indicates the status data of seven disconnectors or
circuit breakers locally and transmits the data to the remote
control system.
Reads seven external binary signals, indicates six of them locally,
and transmits the data to the remote control system.
Measures and indicates three phase currents, three phase-to-
phase voltages, active and reactive power and energy locally and
transmits the information to the remote control system.
Executes local or remote open and close commands for a maxi-
mum of six circuit breakers or disconnectors.
Performs up to five successive high-speed or delayed auto-
reclosures.
Includes 7 optically isolated binary inputs, two OPEN output
contacts and two CLOSE output contacts controlled by the
control module.
Includes 3 optically isolated binary inputs and 5 output contacts
controlled by the relay modules.
Includes an IRF output contact which is common to the relay
modules and the control module.
Forms the voltages required by the modules of the feeder terminal.
Includes matching transformers and calibration electronics for
three phase currents, three phase-to-phase voltages, neutral
current and residual voltage.
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