6
Specification of input and output terminals
Terminal Terminal Function
group
X0 1-2 Phase current I
L1
(5 A).
1-3 Phase current I
L1
(1 A).
4-5 Phase current I
L2
(5 A).
4-6 Phase current I
L2
(1 A).
7-8 Phase current I
L3
(5 A).
7-9 Phase current I
L3
(1 A).
If only one phase current is available for measuring purposes, the ter-
minals X0/1-2 or X0/1-3 for I
L1
should be used. Then the software
switches of the automatic voltage regulating module SPCU 1D50 are
set accordingly.
13-14 Phase-to-phase voltage U
12
(100,110,120 V).
61-62 Auxiliary voltage supply. Terminal 61 positive for DC supply voltage.
Auxiliary voltage range marked on the front panel.
63 Protection earth.
X1 1-2 Manual control signal, changes the regulator to manual mode. The
manual control signal has priority over the automatic control signal.
3-4 Automatic control signal, changes the regulator to automatic mode.
5-6 Lower control signal, gives lower output signal if the unit is in manual
mode. Can also be configured as reduce set voltage input.
7-8 Raise control signal, gives a raise output signal if the unit is in manual
mode. Can also be configured as parallel control input.
9-10 Tap-changer operating input. To avoid regulating pulses when a tap
change is in progress, this input can be connected to the corresponding
tap-changer output.
11-12 Blocking control signal. Can also be configured as remote/local control
input.
13-14 RSV control signal, reduces the voltage set value (U
s
). Can also be
configured as parallel control input.
15-16 Tap-changer position input, mA signal. The positive pole of the signal
is connected to terminal 15.
X2 1-2 Raise output relay
3-4 Lower output relay
5-6 Undervoltage blocking output relay
7-8 Overcurrent blocking output relay. Can also be configured as overvoltage
detection output relay.
9-10-11 Automatic or manual mode output relay, energized in automatic mode
14-15-16 Self-supervision output relay
The voltage regulator SPAU 341 C is connected
to the fibre-optic communication bus via a bus
connection module type SPA-ZC 17 or type
SPA-ZC 21. If the regulator operates in paral-
lel with other regulators, according to the mini-
mizing circulating current principle, the bus
connection module SPA-ZC 100 is used. The
bus connection modules SPA-ZC 17 and SPA-
ZC 21 connect directly to the D-type connec-
tor (SERIAL PORT) on the rear panel of the
regulator, whereas the module SPA-ZC 100 is
connected via a cable type SPA-ZP 25A05.
The opto-connectors of the optical fibres are
plugged into the counter connectors Rx and Tx
of the bus connection module. The communi-
cation mode selector switches of the bus con-
nection module are to be set in position "SPA".
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