sel
Ir
Ir
tsd
tsd
Guaranteeing continuity of
service, selectivity between
Legrand circuit breakers is
optimal thanks to the improved
performance of DPX³ devices.
In critical configurations, the
dynamic selectivity and logical
selectivity offered by the protection
units in electronic DPX³ circuit
breakers provide total continuity
of service in any situation.
LOGICAL SELECTIVITY
This is “smart” selectivity obtained
via communication between
electronic DPX³ (and/or DMX³)
circuit breakers interconnected
by an external wired connection.
It can be used to obtain total
selectivity on several levels
and reduce the thermal and
electrodynamic stresses on the
cables or the bars, thus optimising
the installation.
CURRENT SELECTIVITY
ANDTIME SELECTIVITY
The accurate settings
of electronic DPX³ MCCBs
ensures optimum current
andtime selectivity.
DYNAMIC SELECTIVITY
Electronic DPX³ MCCBs can be set in
2 positions:
“Low” for a normal selectivity level
“High” for a higher selectivity level
Electronic circuit breakers set to
“High” have a slight tripping delay
which means a high selectivity
level can be obtained, even for
the highest short-circuit currents.
current
selectivityzone
time selectivity zone energy
selectivity zone
selectivity limit
BROCHUREMCCBs FROM 16 A TO 1600 A
WWW.LEGRAND.COM
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