ABB SPAC 536 C User Manual page 6

6
To be able to measure analog signals the control
module requires an optional module.
Module
Measuring module SPTM 8A1 Rectifies three phase currents and three phase-to-phase
(optional module 1)
Measuring module SPTM 6A2 Rectifies three phase currents and three phase-to-phase
(optional module 2)
Measuring module SPTM 6A3 Rectifies three phase currents and three phase-to-phase
(optional module 3)
The combined overcurrent and earth-fault relay
module SPCJ 4D24 and the directional earth-
fault relay module SPCS 3C4 are withdrawable
Euro-size (100 x 160 mm) modules.
The control module type SPTO 6D3, too, is
designed as a plug-in unit. This module includes
two PC boards: a CPU board and a front PC
board which are mechanically connected to
each other. The three I/O modules SPTR 4D_
and the optional measuring module are located
behind the module's front PC board. The I/O
modules and the optional measuring modules
can be withdrawn after the control module has
been removed.
The input and output signals of the I/O module
U7 (SPTR 4D_) are all linked via the multi-
pole connector X3. In the same way the signals
of I/O module U8 are linked via multi-pole
connector X4 and the signals of I/O module U9
via multi-pole connector X5.
The functions of the three optional modules
available are as follows:
Function
voltages.
Forms voltage signals of external mA-input signals.
voltages.
Forms using internal current and voltage signals the signals
corresponding to active and reactive power.
(Aron connection).
voltages.
Forms using one internal voltage signal and two current
signals the signals corresponding to active and reactive power.
In SPAC 536 C the power supply module
SPGU 240A1 or SPGU 48B2 and the I/O
module SPTR 6B11 are located behind the
system front panel. The modules can be with-
drawn after removal of the system panel.
In SPAC 636 C the power supply module
SPGU 240A1 or SPGU 48B2 is located behind
the leftmost front plate of the lower level of the
subrack. The I/O module SPTR 6B11 is located
behind the system front panel. The modules are
withdrawable.
The relay modules SPCJ 4D24 and SPCS 3C4
are fastened to the case with two finger screws
and the control module SPTO 6D3 with four
finger screws. These modules can be pulled out
of the subrack after the finger screws have been
loosened.
Note !
Before a module is withdrawn from or inserted
into the subrack the auxiliary supply must be
switched off.