Maintenance Indicators

The counters embedded in the BSCM generate information relating to the number of volt-free contact operations. These volt-free contacts qualify:

The number of open/close operations (OF contact) and open on a fault operations (SD and SDE contacts) on the ComPact NSX circuit breaker
The number of close, open, and reset operations on the motor mechanism

Access the maintenance counters embedded in the MicroLogic trip unit with the communication network.

Counters are assigned to each type of protection:
- Long-time protection
- Short-time protection
- Instantaneous protection
- Ground-fault protection
- Earth-leakage protection
- Jam motor protection
- Phase unbalance protection
- Long-start motor protection
- Underload motor protection
Ten counters are assigned to the alarms associated with measurements. These counters reset if the alarm is reconfigured.
One counter indicates the number of operating hours. This counter is updated every 24 hours.
Four counters are assigned to the load profile: Each counter counts the number of operating hours per loading section (for example, one counter indicates the number of operating hours for the loading section 50–79% of In).
Six counters are assigned to the temperature profile: each counter counts up the number of operating hours per temperature section (for example, one counter indicates the number of operating hours for the temperature section 60–74 °C (60–165 °F)).
Use maintenance counters to enter quantitative information about operations performed on the MicroLogic trip unit (such as the number of push-to-trip tests) or the status of the MicroLogic trip unit (such as the number of Err screens or protection setting lock/unlock operations).
One counter indicates the amount of wear on the circuit breaker contacts as a percentage. When this figure reaches 100%, the contacts must be changed.