5
The feeder terminal SPAC 536 C is housed in a
19 inch subrack, height 3U (~133 mm) and the
feeder terminal SPAC 636 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.
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.
Description of
function
Design
Module
Function
Combined overcurrent and
Three-, two- or single-phase overcurrent protection and two
earth-fault relay module
stage non-directional earth-fault protection.
SPCJ 4D24
Measures, records and displays the three phase currents and
the neutral current locally and transmits the data to the remote
control system.
Directional earth-fault relay
Directional two-stage earth-fault protection.
module SPCS 3C4
Measures, records and displays neutral current and residual
voltage locally and transmits the data to the remote control
system.
Control module SPTO 6D3
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.
I/O module SPTR 4D1 or
Includes 7 optically isolated binary inputs, two OPEN output
SPTR 4D2 (3 pcs)
contacts and two CLOSE output contacts controlled by the
control module.
I/O module SPTR 6B11
Includes 3 optically isolated binary inputs and 5 output con-
tacts controlled by the relay modules.
Includes an IRF output contact which is common to the relay
modules and the control module.
Power supply module
Forms the voltages required by the modules of the feeder
SPGU 240A1 or SPGU 48B2
terminal.
Energizing input module
Includes matching transformers and calibration electronics for
SPTE 8C3 (SPAC 536 C)
three phase currents, three phase-to-phase voltages, neutral
SPTE 8C4 (SPAC 636 C)
current and residual voltage.
