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A-46
Functions and
characteristics
Motor protection
Micrologic 6 E-M electronic trip units
(cont.)
Micrologic 6 E-M provides Power Meter
functions with energy metering. With the
FDM121 display unit, all metering data and
operating indicators are available on the
switchboard front panel. This version also
displays the thermal image of the motor.
Power Meter functions
The built-in Power Meter functions of the Micrologic 6 E-M are the same as those for
the Micrologic 6-E presented in the section on distribution
(see page A-20)
. When
used exclusively in the three-phase version, neutral measurements are excluded.
Operating-assistance functions
The operating-assistance functions of the Micrologic 6 E-M are the same as those
for the Micrologic 6-E presented in the section on distribution
(see page A-22)
.
Special functions for motor feeders
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Phase sequence
The order in which the phases L1, L2, L3 are connected determines the direction of
motor rotation. If two phases are inverted, the direction is reversed.
Information on the direction of rotation is provided. It can be linked to an alarm to
detect an inversion in the direction following servicing on the supply under de-
energised conditions and disable restarting.
Thermal image of the rotor and stator
Micrologic 6 E-M offers a thermal-image function.
Taking into account the Ir setting and the class, an algorithm simulates rotor and
stator temperature rise. It includes the slow temperature rise of the stator and its
metal mass. Also included is the faster temperature rise of the copper rotor.
The thermal protection function trips the circuit breaker when the calculated thermal
image reaches 100 % of the permissible temperature rise.
The communication indicates the thermal-image value as a percentage of the
permissible temperature rise. One or more alarms may be assigned to selected
thresholds. A red LED on the front signals when the value exceeds 95 %.
An SDx module with two outputs programmed for thermal-image values can be used
to implement other alarm functions.
PB103365
Micrologic 6 E-M.
DB111404
E
S
C
I
1
I
2
I
3
I
165 A
100 120
%
165 A
100 120
%
164A
100 120
%
DB111405
E
S
C
°
m
otor = 9
7
%
Current values.
Thermal-image alarm.
DB111403
PC screen with motor thermal image and value monitoring.
The additional technical characteristics are identical to those of Micrologic 6-E
(see pages A-21
and A-23)
.
559E1500.indd
version: 1.0