ABB SPAA 341 C /E351 User Manual Download

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Operation
indicators

2. Measured values, settings and start and trip

data are indicated on the displays of the relay
modules. Starting and tripping are indicated
by the red operation code to the left of the
display. The operation codes are explained in
the manuals of the separate protection relay
modules and on the system panel of the
feeder protection relay.

The start indications can be programmed to
remain on even though the stage resets. Nor-
mally, the numbers indicating start are auto-
matically reset, whereas the trip codes have to
be reset by pressing the RESET push-button.
The TRIP indicator at the bottom part of the
front panel can be set to indicate starting and
tripping. The BS1, BS2 and RRES signals
can be configured to automatically reset the
trip indicators. The closing signal of the auto-
reclose relay module is linked to the RRES
input, which can be used to reset the opera-
tion indicators after a successful auto-reclose
sequence. An unreset operation indicator does
not affect the operation of the relay module.

3. Measured values and settings presented on

the display are identified by yellow LEDs on
the front panel.

4. A permanent fault detected by the self-super-

vision system is indicated by the IRF indica-
tor of the concerned relay module. The fault
code appearing on the display when a fault
occurs should be recorded to facilitate main-
tenance and repair.

The operation indicators are described in detail
in the manuals of the individual relay modules.

Fig. 5. Front panel of feeder protection relay
SPAA 341 C /E351.

1. The green LED U

aux

on the system panel is lit

when the power supply unit is operating.

I/O module

The I/O module of the feeder protection relay
SPAA 341 C /E351 is fitted in the rear part of
the relay, in the same direction as the mother PC
board. The module can be withdrawn after
undoing the fixing screws and disconnecting the
protective earth conductor of the cover and the
flat cable connected to the mother PC board.

The I/O module contains the output relays (8
pcs + IRF), the control circuits of the relays, the
electronic circuits for the five external control
inputs and the D connector required for serial
communications. The input and output signals
of the I/O module are linked to the mother
board over a flat cable. The relay module loca-
tions U1 and U2 are identical. The location U3
is intended for the auto-reclose module.

The output signals SS1...SS4, TS1...TS3 and
CBCS control an output relay with the same
designation. The operation of the stages are not
fixed to a particular output relay but can be
programmed for the desired output relays. It
should, however, be noted that the output relays
TS1, TS2, TS3 and CBCS can be used for
circuit breaker control. The configuration of the
switchgroups is described in detail in the relay
module manuals.

The operation of the external control inputs is
determined by the setting of the configuration
switchgroups of the relay modules. The control
inputs can be used for blocking one or several
protection stages, for resetting latched output
relays, selecting second settings, etc.

RS 703 258 - AA

Ser.No.

SPAA 341 C

/E351

0036A

aux

18...80 V –

80...265 V ~

–

SPCJ 4D28

SPCT 5D54

n = 50Hz