Electrical Distribution Protection
Presentation
MicroLogic Active control units are designed to provide protection against overcurrents and ground-fault currents.
Description
When choosing protection characteristics, take into account:
-
Overcurrents (overloads and short-circuits) and potential ground-fault currents
-
Conductors that need protection
-
Coordination and selectivity between the devices
-
The presence of harmonic currents
Protection characteristics can be represented on a trip curve that shows the circuit breaker trip time as a function of the measured current and protection settings. Protection settings are indexed on the rated current In of the MicroLogic Active control unit.
Rated Current In
The protection setting ranges depend on the rated current In, defined by the sensor plug inserted in the MicroLogic Active control unit.
Contact your Schneider Electric Services representative to replace or modify the sensor plug. Mechanical mismatch protection prevents the installation of a sensor plug that is not compatible with the circuit breaker frame.
For IEC standard circuit breakers, the range of sensor plugs available is shown in the following table.
|
In |
Commercial reference |
Frame rated current |
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
MTZ1 |
MTZ2 |
MTZ3 |
|||||||||||||||
|
06 |
08 |
10 |
12 |
16 |
08 |
10 |
12 |
16 |
20 |
25 |
32 |
40 |
40 |
50 |
63 |
||
|
400 A |
LV947053 |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
– |
– |
– |
– |
– |
– |
|
630 A |
LV933091 |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
– |
– |
– |
– |
– |
– |
|
800 A |
LV933092 |
– |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
– |
– |
– |
– |
– |
– |
|
1,000 A |
LV933093 |
– |
– |
✔ |
✔ |
✔ |
– |
✔ |
✔ |
✔ |
✔ |
– |
– |
– |
– |
– |
– |
|
1,250 A |
LV833094 |
– |
– |
– |
✔ |
✔ |
– |
– |
✔ |
✔ |
✔ |
✔ |
✔ |
✔ |
– |
– |
– |
|
1,600 A |
LV933095 |
– |
– |
– |
– |
✔ |
– |
– |
– |
✔ |
✔ |
✔ |
✔ |
✔ |
– |
– |
– |
|
2,000 A |
LV933982 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
✔ |
✔ |
✔ |
– |
– |
– |
|
2,500 A |
LV933983 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
✔ |
✔ |
– |
– |
– |
|
3,200 A |
LV933984 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
✔ |
– |
– |
– |
|
3,600 A |
LV936390 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
– |
– |
– |
|
4,000 A |
LV947820 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
– |
– |
– |
|
2,000 A |
LV947821 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
✔ |
✔ |
|
2,500 A |
LV947822 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
✔ |
✔ |
|
3,200 A |
LV947823 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
✔ |
✔ |
|
4,000 A |
LV947824 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
✔ |
✔ |
|
5,000 A |
LV947825 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
✔ |
|
6,300 A |
LV947826 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
✔ |
MicroLogic Active 2.0 Control Unit
|
MicroLogic Active 2.0 control units for IEC standard provide:
The protection functions of MicroLogic Active 2.0 control units operate without an auxiliary power supply. The control unit is powered by the current flowing through the circuit breaker. |
MicroLogic Active 5.0 Control Unit
 |
MicroLogic Active 5.0 control units for IEC standard provide:
The protection functions of MicroLogic Active 5.0 control units operate without an auxiliary power supply. The control unit is powered by the current flowing through the circuit breaker. |
MicroLogic Active 6.0 Control Unit
|
MicroLogic Active 6.0 control units for IEC standard provide:
The protection functions of MicroLogic Active 6.0 control units operate without an auxiliary power supply. The control unit is powered by the current flowing through the circuit breaker. |
 |
DIN / DINF and SELLIM Instantaneous Protections
DIN/DINF and SELLIM instantaneous protections are internal protections used when the short-circuit current reaches the withstand limit of the circuit breaker. These protections are not adjustable and are unlikely to be triggered in normal operating conditions.
The following predefined events can be generated by the DIN / DINF and SELLIM instantaneous protections.
|
Code |
Event |
History |
Severity |
|---|---|---|---|
|
0x6406 (25606) |
Ultimate self-protection (SELLIM) trip |
Trip |
High |
|
0x641D (25629) |
Ultimate self-protection (DIN/DINF) trip |
Trip |
High |
Predefined events cannot be modified by the user. For general information about events, refer to Event management.
Recommended Actions
|
Code |
Event |
Recommended actions |
|---|---|---|
|
0x6406 (25606) |
Ultimate self-protection (SELLIM) trip |
Reset the circuit breaker. See Resetting a Trip Event. |
|
0x641D (25629) |
Ultimate self-protection (DIN/DINF) trip |
Reset the circuit breaker. See Resetting a Trip Event. |
Resetting a Trip Event
For information about resetting the circuit breaker after a trip due to an electrical fault, refer to the relevant document:
-
MasterPacT MTZ1 IEC Circuit Breakers with MicroLogic Active Control Unit - User Guide
-
MasterPacT MTZ2/MTZ3 IEC Circuit Breakers with MicroLogic Active Control Unit - User Guide