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Description of
functions
Control functions
Measurement
functions
The control module type SPTO 6D3 is used for
reading binary input signals and for local and
remote status indication of the binary signals.The
control module also executes open and close
commands for controllable switching devices of
the switchgear.
Input channels 1...7 are used for reading status
information of the switching devices, i.e. circuit
breakers and disconnectors here after called
objects. Each of these channels include two
physical inputs, one for the "object open" and
one for the "object closed" information. The
control module indicates the status information
locally on the front panel by means of LED
indicators and transfers the status information
to the substation level communication equip-
ment using the SPA serial bus.
The control module reads the status informa-
tion of max. 7 objects. The front panel of the
control module is provided with a LED matrix
used for object status indication. The object
status indication LEDs of the control module
are freely configurable by the user to match the
combinations of switching devices of the
switchgear cubicles.
Input channels 8...17 consist of single binary
input circuits. These channels are basically used
for transferring binary signals, other than circuit
breaker and disconnector status information
As a standard feature the control module SPTO
6D3 includes a pulse counter input by means of
which energy pulse are counted. For additional
measuring functions an optional measuring
module is required. The optional module recti-
fies and processes the analog signals and for-
wards them to the control module, which incor-
porates the actual measuring software. Three
types of optional measuring modules are avail-
able.
When the measuring module type SPTM 8A1 is
used in combination with the control module
SPTO 6D3 three phase currents, three phase-
to-phase voltages and two mA signals can be
measured. The mA inputs are used for measur-
ing active and reactive power. External measur-
ing transducers are needed.
When the measuring module type SPTM 6A2
is used in combination with the control module
SPTO 6D3 three phase currents, three phase-
to-phase voltages and active and reactive power
can be measured. From the current and voltage
signals, over the SPA bus to the substation level
system. The status of input channels 8...13 is
indicated locally by LEDs on the front panel of
the control module.
The control module is capable of providing
open and close commands for six objects. The
commands may be given via the local push-
buttons on the front panel, the SPA serial bus or
the input channels 8...17. The length of the
pulse-shaped OPEN or CLOSE signals can be
determined by the user.
An enable signal must be given by the interlock-
ing program before an OPEN or CLOSE pulse
can be delivered. The enable signal is controlled
by the status of input channels 1...7 and 8...17
and the interlocking program written by the
user.
Signal outputs, SIGNAL5 and 6 can be used for
indicating the status of the input channels 8...17.
The OPEN, CLOSE or SIGNAL outputs can
be controlled by the Direct Output Control
program. This program resembles the interlock-
ing program. The user can define under which
circumstances an output is to be activated. This
control of an output is determined by the status
of inputs 1...7 and 8...17, the position of the
LOCAL/REMOTE key switch and the Direct
Output Control Program written by the user.
input signals the measuring module forms the
signals which are proportional to active power
and reactive power using the Aron connection
principle.
When the measuring module type SPTM 6A3
is used in combination with the control module
SPTO 6D3 three phase currents, three phase-
to-phase voltages as well as active and reactive
power can be measured. From one voltage signal
and two current signals the measuring module
forms the signals which correspond to the three-
phase active and three-phase reactive power.
The voltage to be used and its related current
signals can be selected by means of switches.
Input channel 11 can be used as a pulse counter
input for energy pulses. Energy can also be
calculated by integrating the measured power
values over time.
The measured signals can be scaled for display
locally and for remote transfer over the SPA bus
as primary values.
3
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