Monitoring the MCH Gear Motor
Presentation
The MCH gear motor undergoes wear due to the number of charging operations. It is recommended to check it at periodic intervals to decide whether the gear motor must be changed or not. To avoid regular inspection of the gear motor, events are generated when the gear motor reaches 80% or 100% of the recommended maximum number of charging operations.
Operating Principle
The MicroLogic X control unit:
-
Counts the number of charging sequences performed to rearm the closing mechanism after each circuit breaker closure.
-
Measures and records the last charging time of the MCH gear motor to rearm the closing mechanism.
-
Calculates the percentage of wear of the MCH gear motor
-
Generates an event when:
-
MCH gear motor reaches 80% of recommended maximum number of charging operations
-
MCH gear motor reaches 100% of recommended maximum number of charging operations
-
For more information about the recommended number of operations, refer to DOCA0099•• MasterPacT MTZ - IEC Switch-Disconnectors and Circuit Breakers with MicroLogic X Control Unit - Maintenance Guide.
Resetting the MCH Gear Motor Data
| NOTICE |
|---|
|
invalid monitoring
After replacement of the MCH gear
motor, reset the charging operation counter to zero.
Failure to follow these instructions will result in incorrect
operation count.
|
The following MCH gear motor data can be reset or set to zero with EcoStruxure Power Commission software (password-protected):
-
Charging operation counter
-
Last charging time
Data Availability
The MCH gear motor data is available as follows:
-
On the MicroLogic X display screen, at:
-
With EcoStruxure Power Commission software
-
With the EcoStruxure Power Device app through Bluetooth or USB OTG connection
-
On a remote controller using the communication network
| Monitoring data | MicroLogic X HMI | EPC software | EPD software | Communication |
|---|---|---|---|---|
|
Percentage wear |
Yes |
No |
Yes |
No |
|
Charging operation counter |
No |
Yes |
Yes |
Yes |
|
Last charging time |
No |
Yes |
Yes |
Yes |
Predefined Events
The monitoring of the MCH gear motor generates the following events:
|
Code |
Event |
History |
Severity |
|---|---|---|---|
|
0x1450 (5200) |
|
Diagnostic |
Medium |
|
0x1451 (5201) |
|
Diagnostic |
High |
Recommended Actions
|
Code |
Event |
Recommended actions |
|---|---|---|
|
0x1450 (5200) |
|
Plan to replace the MCH. |
|
0x1451 (5201) |
|
Replace the MCH. |
Contact Schneider Electric Support or your Schneider Electric Services representative for more information about who can carry out the recommended actions.