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Parameter assignment / addressing
9.1 Setting the parameters
Parameter
Setting buttons
L
I
R
t
R
S
I
sd
I
t
2
sd
t
sd
I
I
i
N
I
N
120
Effect on
Brief description
characteristic curve
Tripping current of the
overload protection I
0.4 to 1 x I
Delay (or time-lag
class) in the overload
range. The set time is
the tripping time at 6 x
I
R
Tripping current of the
short-time delayed
short-circuit protection
I
sd
Change from a
constant time delay to a
I
2
in the short-circuit
range I
Delay time of the short-
circuit protection.
Please note: The
selection between t
constant and I
characteristic t
to 0.5 s with the
position of the rotary
encoding switch
Tripping current of the
instantaneous short-
circuit release I
to 11 x I
Tripping current of the
neutral conductor
protection I
x I
Cause
Setting to the operating current of
=
the circuit to be protected
R
n
Improved selectivity in the
overload range in switchgear with
several grade levels when the
rated currents differ only slightly
. t
= 2.5 to 30 s
R
Short-circuit release with time
delay. In this way, time selectivity
can be achieved with
= 1.5 to 10 x I
downstream switching devices.
R
Improved selectivity with
downstream switchgear, e.g.
t characteristic curve
LVHRC fuses
t
= ON or OFF
2
sd
Improved selectivity of the short-
circuit protection in switchgear
with several grade levels
=
sd
t
2
= 0
sd 1)
Instantaneous short-circuit
tripping for immediate shutdown
= 1.25
of the molded case circuit
i
breaker when the permissible
n
short-circuit current is exceeded
Overload protection of a neutral
conductor or protection of a
= 0.5 or 1
conductor with reduced cross-
N
section
R
System Manual, 11/2013, 110 0110 - 02 DS 03
3VL IEC molded case circuit breakers
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