SmartDCProtection & alarms
Insulation, residual current, device status and actionable events.
Active conditions
Acknowledging records awareness. The condition stays active.
Elevated connection temperature
Joint J04-A is 61.6 °C, with a 33.2 K rise above local ambient. Review loading and the connection trend, and arrange inspection under the site’s electrical work procedures.
Temperature sensor is not reporting
The last valid J06-B temperature sample is more than 5 minutes old. Current, voltage and breaker telemetry remain available. Thermal condition is unknown until communication is restored.
Insulation & earth monitoring
Floating two-wire system · separate monitors per isolated bus
Pole-to-earth symmetry does not prove good insulation. If A and B became galvanically connected, the insulation monitors would have to be coordinated.| Measurement | Bus A | Bus B | Unit |
|---|---|---|---|
| System insulation resistanceInsulation monitor; valid measurement state | 1.82 | 2.36 | MΩ |
| Residual current · AC+DC RMSDC-capable zero-flux sensor · DC–1 kHz band | 14.2 | 11.6 | mA |
| System leakage capacitanceIMD estimate to protective earth | 6.8 | 6.3 | µF |
| IMD self-test / connectionSimulated instrument diagnostics | Passed | Passed | status |
| Branch fault locatorNo branch-level insulation localization | Not fitted | Not fitted | status |
Pole-to-earth symmetry does not prove good insulation. If A and B became galvanically connected, the insulation monitors would have to be coordinated.
Protective device status
Reported state and configured ratings
Monitoring thresholds
Monitoring limits, not protective relay or breaker settings
The alarms on this page follow these limits, delays and reset points. They are starting points that need equipment-specific review. Independent protection performs any trip action, and this interface has no switching or trip controls.- Connection temperature≥ 60 °CAdvisory after 30 s · resets below 55 °C
- Temperature critical≥ 75 °C10 s delay · resets below 70 °C
- Thermal sample age> 30 sStale until a fresh valid sample arrives
- Insulation resistance< 0.50 MΩValid IMD result · 10 s delay · resets above 0.60 MΩ
- Residual AC+DC RMS> 30 mADC–1 kHz · 10 s delay · resets below 25 mA
- Bus undervoltage< 760 VDC500 ms delay · resets above 770 VDC
- Bus overvoltage> 840 VDC500 ms delay · resets below 830 VDC
- Bus loading> 80%60 s delay · resets below 75%
The alarms on this page follow these limits, delays and reset points. They are starting points that need equipment-specific review. Independent protection performs any trip action, and this interface has no switching or trip controls.
Event history
Eastern time
| Time | Asset | Event | State |
|---|---|---|---|
| 17:36 ET | J06-B | Temperature sensor is not reporting | Active |
| 17:24 ET | J04-A | Elevated connection temperature | Active |
| 16:47 ET | Bus A | Captured voltage dip · 772.4 V · 12.4 ms | Recovered |
| 15:41 ET | A + B | Insulation monitor self-test completed | Passed |