MicroLogic Maintenance Interfaces
Description of Requirements
The MicroLogic trip unit must be powered by a 24 Vdc power supply to carry out local checks on the trip unit. The 24 Vdc supply can be provided by an external power supply, the Service Interface, or the USB maintenance interface:
|
Maintenance interface |
Availability on the trip unit |
|---|---|
|
24 Vdc external power supply module |
✔(1) |
|
Pocket battery for MicroLogic |
✔(2) |
|
Service Interface connected to a PC with EcoStruxure Power Commission |
✔(2) |
|
Stand-alone USB maintenance interface |
✔(2) |
|
USB maintenance interface connected to a PC with EcoStruxure Power Commission software |
✔(2) |
|
(1) Possible on MicroLogic 5, 6, and 7 trip units (2) Not available on MicroLogic 2.3 trip unit installed in a ComPact NSX400K circuit breaker. |
|
The following table shows the different functions of each maintenance interface:
|
Maintenance interface |
Modifying settings |
Checking settings |
Testing |
Saving settings |
|---|---|---|---|---|
|
24 Vdc external power supply module |
✔ |
✔(1) |
– |
– |
|
Pocket battery |
✔ |
✔(1) |
– |
– |
|
Service Interface connected to a PC with EcoStruxure Power Commission software |
✔ |
✔ |
✔ |
✔ |
|
Stand-alone USB maintenance interface |
✔ |
✔(1) |
✔(2) |
– |
|
USB maintenance interface connected to a PC with EcoStruxure Power Commission software |
✔ |
✔ |
✔ |
✔ |
|
(1) In full for MicroLogic trip units 5, 6, and 7 (for MicroLogic 2 and 4 trip units, only the position of the dials is checked) (2) Only on tripping via the push-to-trip button |
||||
Modifying Settings
 WARNING |
|---|
|
HAZARD OF NUISANCE TRIPPING OR FAILURE TO TRIP
Protection setting adjustments must be done by qualified
electrical personnel.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.
|
Modifying settings requires a thorough knowledge of the installation characteristics and safety rules.
Checking Settings
Settings can be checked without the need for any particular precautions. It is recommended that they be carried out by a qualified person.
Testing the Circuit Breaker Mechanism
 CAUTION |
|---|
|
HAZARD OF NUISANCE TRIPPING
Protection tests must be done by qualified electrical
personnel.
Failure to follow these instructions can result in injury or equipment damage.
|
When testing the circuit breaker trip mechanism, the necessary precautions must be taken:
-
Not to disrupt operations
-
Not to trip inappropriate alarms or actions