Masterpact NT and NW power circuit breakers

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A-8
All Masterpact circuit breakers are equipped with a
Micrologic control unit that can be changed on site.
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
Integration of protection functions in an ASIC electronic component used in all
Micrologic control units guarantees a high degree of reliability and immunity to
conducted or radiated disturbances.
On Micrologic A, E, P and H control units, advanced functions are managed by an
independent microprocessor.
Accessories
Certain functions require the addition of Micrologic control unit accessories,
described on page A-25 .
The rules governing the various possible combinations can be found in the
documentation accessible via the Products and services menu of the
web site.
Micrologic name codes Current protection
X: type of protection
2 for basic protection b b
5 for selective protection b b
6 for selective + earth-fault protection b b
7 for selective + earth-leakage protection. b b
Y: control-unit generation
Identification of the control-unit generation.
“0” signifies the first generation.
Z: type of measurement
A for “ammeter” b b
E for “energy” b b
P for “power meter” b b
H for “harmonic meter”. b b
Micrologic 2: basic protection
DB101116
Protection:
long time
+ instantaneous
Micrologic 5: selective protection
DB101117
Protection:
long time
+ short time
+ instantaneous
Micrologic 6: selective + earth-fault protection
DB101117 DB101118
Protection:
long time
+ short time
+ instantaneous
+ earth fault
Micrologic 7: selective + earth-leakage protection
DB101117 DB101119
Protection:
long time
+ short time
+ instantaneous
+ earth leakage up to 3200A
2.0 E
X Y Z
Functions
and characteristics
Micrologic control units
Overview of functions
PB100772-32 PB106351A32
version: 10.1 207E2200.indd