Standard End-User Preventive Maintenance Program
Definition
The Standard end-user preventive maintenance program can be carried out by:
-
Trained and qualified maintenance services provider personnel.
-
Schneider Electric field service representatives.
The Standard end-user preventive maintenance program includes the Basic end-user preventive maintenance program.
The Standard end-user preventive maintenance program comprises:
-
Extended visual inspection.
-
Extended function checks.
-
Part and system servicing (cleaning, greasing).
-
Part replacement (based on time intervals or number of units of use).
The Standard end-user preventive maintenance program must be performed every two years in the case of normal operating conditions. Refer to the recommended frequency for the Standard end-user maintenance program for other cases.
Procedures
The Standard end-user procedures are described in detail in MasterPact NT/NW - Basic and Standard End-User Maintenance Procedures for IEC Devices.
|
Part |
Procedure title |
Procedure name |
|---|---|---|
|
Mechanism |
Check the MCH gear motor charging time at 0.85 Un |
Mechanism NIII_2_1 |
|
Check the general condition of the mechanism |
Mechanism NIII_2_2 |
|
|
Check the number of device operating cycles |
Mechanism NIII_2_3 |
|
|
Breaking unit (arc chutes + contacts) |
Check the condition of the breaking unit |
Breaking Unit NIII_2_1 |
|
Check mounting of arc chutes and filter cleanliness |
Breaking Unit NIII_2_2 |
|
|
Auxiliaries |
Check operation of indication contacts (OF, PF) |
Auxiliaries NIII_2_1 |
|
Check closing operation with XF closing voltage release at 0.85 Un |
Auxiliaries NIII_2_2 |
|
|
Check opening operation with MX opening voltage release at 0.70 Un |
Auxiliaries NIII_2_3 |
|
|
Check closing and opening operations with MN undervoltage release |
Auxiliaries NIII_2_4 |
|
|
Check time delay of MNR delayed undervoltage release |
Auxiliaries NIII_2_5 |
|
|
Control unit |
Check overcurrent protection |
Control Unit NIII_2_1 |
|
Save protection settings, reports, and event logs (MicroLogic P and H) |
Control Unit NIII_2_3 |
|
|
Chassis |
Clean chassis and check presence of grease on chassis |
Chassis NIII_2_1 |
|
Check disconnecting contact clusters |
Chassis NIII_2_2 |
|
|
Check operation of safety shutters |
Chassis NIII_2_3 |
|
|
Check operation of CD, CT, CE position contacts and EF auxiliary contacts |
Chassis NIII_2_4 |
|
|
Power connections |
Check connection system |
Power Connections NIII_2_1 |
Tools
Performing the procedures of the maintenance program requires the following:
-
A standard toolbox with electrical tools and equipment for an electrician.
-
Specific tools, detailed in the maintenance procedures. Refer to MasterPact NT/NW - Basic and Standard End-User Maintenance Procedures for IEC Devices.
Time Required
In addition to the Basic end-user maintenance program, the average time required for experienced, trained, and qualified maintenance personnel to perform this maintenance program is as follows:
-
45 minutes for a fixed device with all accessories installed
-
1 hour for a drawout device with all accessories installed