ABB GDD360C inverter control cabinet logic board
starts delivering a start signal after a preset ~40
ms start time, when the set start current is
exceeded. When the set operate time elapses, the
earth-fault unit operates.
The low-set stage of the overcurrent unit and the
low-set stage of the earth-fault unit may be given
definite time or inverse definite minimum time
(IDMT) characteristic. When the IDMT characteristic is chosen six time/current curves are
available. Four of the curves comply with the BS
142 and IEC 60255 and are named "Normal
inverse", "Very inverse", "Extremely inverse"
and "Long-time inverse". The two additional
inverse time curves called the "RI-curve" and
the "RXIDG-curve" are also provided.
By appropriate configuration of the output relay
matrix, the start signals of the overcurrent and
earth-fault units are obtained as contact functions. The start signals can be used for blocking
co-operating protection relays, for signalling
and for initiating auto-reclosing.
The relay includes one external binary input,
which is controlled by an external control voltage. The function of the control input is determined by selector switches in the protection
relay module. The control input can be used for
blocking the operation of one or more protection stages, for resetting a latched output relay in
the manual reset mode or for enforcing a new set
of relay setting parameters by remote control.

Uaux Auxiliary voltage
A, B, C, D, E, F Output relays
IRF Self-supervision
SGR Switchgroups for the configuration of the output relays
SGB Switchgroup for the configuration of the blocking or control signal
TRIP Trip output relay
SIGNAL 1 Signal on operation of the overcurrent unit
SIGNAL 2 Signal on operation of the earth-fault unit
START 1 Starting or auxiliary trip signal as selected with switchgroup SGR3
START 2 Start signal of the low-set overcurrent stage I>
U1 Overcurrent and earth-fault relay module SPCJ 4D29
U3 Input module SPTE 4E1
U2 Power supply and output relay module SPTU 240 R1 or SPTU 48 R1
T1…T9 Start and operation indications
SERIAL PORT Serial communication port
SPA-ZC_ Bus connection module
Rx/Tx Receiver bus terminal (Rx) and transmitter bus terminal (Tx) of the bus
connection module