LV power air circuit breakers and switch-disconnectors ... - Piti Group

Performance and
functionality
Micrologic control units
Overview of functions
All Masterpact circuit breakers can be
equipped with a Micrologic control unit.
Control units are designed to protect Power
circuits and loads. Alarms may be
programmed for remote indications.
Measurements of current, voltage,
frequency, power and power quality
optimise continuity of service and energy
management.
Dependability
The use of an ASIC electronic component for protection functions in all Micrologic
control units, guarantees a high degree of reliability and immunity to conducted or
radiated disturbances.
On Micrologic A, P and H* control units, advanced functions are managed by an
independent microprocessor.
Micrologic name codes
5.0 A
X Y Z
t
Micrologic 5: selective protection
X: type of protection
c 5 for selective protection.
c 6 for selective + earth-fault protection.
c 7 for selective + earth-leakage protection.
Y: control-unit generation
Identification of the control-unit generation.
“0” signifies the first generation.
Z: type of measurement
c A for “ammeter”.
c P for “power meter”.
0 Ir Isd Ii I
t
Protection:
long time + short time + instantaneous
Micrologic 6: selective + earth-fault protection
t
0 Ir Isd Ii I
0 Ig
I
Protection:
long time
+ short time
+ instantaneous
+ earth fault
Micrologic 7: selective + earth-leakage protection
t
t
0 Ir Isd Ii I
0 I∆n I
Protection:
long time
+ short time
+ instantaneous
+ earth leakage
* Availability to be announced
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