ABB ICSI16E1 CS31 input and output module
Low-set phase overcurrent stage I> with definitetime or inverse time characteristic
High-set phase overcurrent stage I>> with in stantaneous function or definite time character istic
Low-set earth-fault stage I0> with definite time
or inverse time characteristic
High-set earth-fault stage I0>> with definite
time characteristic
Six time/current curve sets at inverse time char acteristic of the overcurrent stage I> and the
earth-fault stage I0>
Digital display of measured and set values and
data sets recorded at the moment of relay opera tion
Parametrization of the module by push-buttons
on the front panel or via the serial port using a
portable PC and a suitable software
Continuous hardware and software supervision
including auto-diagnosis
The phase overcurrent unit of the relay module
SPCJ 4D29 is designed for single-phase, twophase or three-phase overcurrent protection. It
includes two overcurrent stages, i.e. a low-set
overcurrent stage I> and a high-set overcurrent
stage I>>.
The low-set or high-set phase overcurrent stage
starts if the current on one or several of the
phases exceeds the set start current value of the
stage concerned. When the stage starts it generates a start signal SS1 or TS1 and simultaneously
the digital display on the front panel indicates
starting. If the overcurrent situation lasts long
enough to exceed the set operate time, the stage
operates and generates a trip signal TS2. At the
same time the operation indicator is lit with red
light. The red operation indicator remains lit
although the stage resets. The indicator is reset
by pushing the RESET push-button. By proper
configuration of the output relay switchgroups
an additional auxiliary trip signal TS1 can be
obtained.
The operation of the low-set phase overcurrent
stage I> or the high-set phase overcurrent stage
I>> can be blocked by routing a blocking signal
BS to the unit. The blocking configuration is set
with switchgroup SGB.
The operation of the low-set phase overcurrent
stage can be based on definite time or inverse
time characteristic. The operation characteristic
is selected with the SGF1/1…3 switches. At
definite time operation characteristic the operate time t> is set in seconds within the range,
0.05...300 s. When the inverse time operation
characteristic (IDMT) is selected, four internationally standardized and two complementary
time/current curves are available. The selector
switches SGF1/1...3 are also used for selecting
the desired operation characteristic.
Note!
The maximum continuous current carrying capacity of the energizing inputs is 4 x In, which
must be observed when relay settings are calculated.
Note!
Because of the maximum measured current
(63 x In), the setting value 2.5 is used for the
IDMT calculation if the set value is greater than
2.5. This makes the operate time faster than the
theoretical IDMT curve. However, the stage
always starts according to the set value.

Note!
The operation of the low-set stage based on
inverse time characteristic will be blocked1) by
starting of the high-set stage. Then the operate
time of the overcurrent unit is determined by
the set operate time of the high-set stage at heavy
fault currents.
1)From program version 183 B and later this
function can be switched off with switch 2 of
the extended switchgroup, SGX. By default
this function is switched off.
The setting range of the operate time t>> of the
high-set phase overcurrent stage is 0.04...300 s.
The operate signal of the two overcurrent stages
is provided with a latching feature (switch
SGB/6) which means that the operate signal
TS2 is kept high after an operation, although
the overcurrent stage resets. The latched TS2
signal is reset by pushing the RESET and PRO GRAM push-buttons simultaneously or via the
serial port using the command V101, see also
chapter "Selector switches".
The set start current value I>> of the high-set
phase overcurrent stage can be doubled auto matically on connection of the protected object
to the network, i.e. at starting. In this way the
start current of the high-set phase overcurrent
stage can be given a lower value than the level of
the connection inrush current. The automatic
doubling function is selected with switch SGF1/5.
The starting, which activates the doubling func tion, is defined as a situation where the phase
currents rise from a value below 0.12 x I> to a
value exceeding 1.5 x I> in less than 60 ms. The
function stops when the currents fall below 1.25x I>.
The setting range of the start current of the high set phase overcurrent stage is 0.5...40 x In.
When the high-set stage is given a start current
setting in the lower end of the setting range, the
relay module will contain two almost identical
overcurrent stages. This enables the overcurrent
unit of the SPCJ 4D29 module to be used, for
example, in two-stage load shedding applica tions.
The high-set phase overcurrent stage can be set
out of operation with switch SGF2/5. When the
high-set stage is set out of operation the display
shows "- - -", indicating that the start current
setting is infinite.