Motor Mechanism
Introduction
The diagrams are shown with circuits de-energized, all devices open, connected, and charged, and relays in normal position.
Terminals
shown in red 
must be connected by the customer.
After tripping initiated by the push-to-trip button or by the MN undervoltage trip release or the MX shunt trip release, device reset can be:
-
automatic
-
remote
-
manual
Following tripping due to an electrical fault (with an SDE contact), reset must be carried out manually.
Motor Mechanism with Automatic Reset
|
Symbol |
Description |
|---|---|
|
Q |
Circuit breaker |
|
A4 |
Opening order |
|
A2 |
Closing order |
|
B4, A1 |
Motor mechanism power supply |
|
L1 |
Manual position () |
|
B2 |
SDE interlocking (mandatory for contact operation) |
|
BPO |
Opening push button |
|
BPF |
Closing push button |
|
SDE |
Electrical-fault indication contact |
Motor Mechanism with Remote Reset
|
Symbol |
Description |
|---|---|
|
Q |
Circuit breaker |
|
A4 |
Opening order |
|
A2 |
Closing order |
|
B4, A1 |
Motor mechanism power supply |
|
L1 |
Manual position () |
|
B2 |
SDE interlocking (mandatory for contact operation) |
|
BPO |
Opening push button |
|
BPF |
Closing push button |
|
SDE |
Electrical-fault indication contact |
Motor Mechanism with Manual Reset
|
Symbol |
Description |
|---|---|
|
Q |
Circuit breaker |
|
A4 |
Opening order |
|
A2 |
Closing order |
|
B4, A1 |
Motor mechanism power supply |
|
L1 |
Manual position () |
|
B2 |
SDE interlocking (mandatory for contact operation) |
|
BPO |
Opening push button |
|
BPF |
Closing push button |
|
SDE |
Electrical-fault indication contact |
Communicating Motor Mechanism
|
Symbol |
Description |
|---|---|
|
Q |
Circuit breaker |
|
B4, A1 |
Motor mechanism power supply |
|
BSCM |
Breaker status control module |