ABB SPAU 341 C User Manual

3
Function of
control inputs
Tap-changer operating input (TCO)
The tap-changer operating input is used to de-
clare that a raise or lower command is executed.
I >, U< internal blocking inputs
These inputs are activated by the automatic con-
trol module SPCU 1D50 in an overcurrent or
undervoltage situation. Manual control is
blocked by an overcurrent situation. In an und-
ervoltage situtation, however, manual control
is still enabled. A LED indicator is provided for
each blocking.
External blocking input
If the unit is externally blocked by the control
input, the corresponding blocking LED is lit
and any tap-changer control is prevented.
U > , overvoltage detection input
This input is activated by the module SPCU
1D50 in an overvoltage situation. During such
a condition, an indicating LED is lit, but manual
tap-changer control is still possible.
SPCN 1D56
RESET
STEP
IRF
POS
0112A
PROGRAM
MAN
BLOCK
TCO
>
I
U
<
U
>
Front panel
Simplified device symbol
Self-supervision alarm indicator
Position indication LED
Display for setting values, position indication
and measured values
Reset and display step push-button
LED indicators for blockings, raise/lower
control and tap-changer operation
Program push-button
Raise push-button
Lower push-button
Manual control indication LED
Type designation of the module
Fig 1. Front panel of the manual voltage regulating module SPCN 1D56

ABB SPAU 341 C Specifications

General

Brand	ABB
Model	SPAU 341 C
Category	Relays
Language	English