Hearing the motor through the cable
Passer-T captures the electrical signature of motors and generators — three-phase stator current and voltage — at the same fidelity as Passer-V captures vibration. The raw stream goes to a Larus gateway, where Motor Current Signature Analysis (MCSA), torque estimation and load profiling are performed.
Why current? Because the motor itself is a sensor. Broken rotor bars, air-gap eccentricity, bearing faults, mechanical unbalance and load anomalies all leave fingerprints in the stator current spectrum. Catching them in current is often easier (and cheaper) than instrumenting every shaft with vibration sensors — especially on assets where mechanical access is restricted.
Why teams pick Passer-T
- Non-intrusive. Clamp-on CTs and a voltage tap in the MCC. No mechanical work on the motor.
- Hard-to-instrument assets. Submersible pumps, hot-end fans, pumps in remote stations — anywhere mechanical sensors are impractical.
- Pairs with Passer-V for fusion diagnostics. Synced via PTP, the combined vibration + current view dramatically improves diagnostic confidence and false-alarm rate.
- Same data path. Raw stream to Larus. Diagnostics evolve in software, not in the cabinet.
What it does not do
- No on-board MCSA / spectrum analysis — those live on Larus.
- No power-quality compliance reporting (THD, sag/swell) — that’s a different product class. Passer-T focuses on motor health, not utility-grade PQ.
Typical configurations
| Use case | Setup |
|---|---|
| Single critical motor (e.g., main mill drive) | 1× Passer-T, 1× Larus-100 |
| Pump station with 4 motors | 2× Passer-T (sharing voltage tap), 1× Larus-100 |
| Asset with both vibration & current diagnostics | 1× Passer-V + 1× Passer-T + 1× Larus-100 |