A portable tool lets us check power on live systems safely and quickly, without shutdowns, making routine testing easy in industrial and EV setups.
Routine power quality checks in industrial plants, commercial buildings, and EV charging setups are often hard to carry out because many meters use fixed current transformers that need cables to be disconnected and panels to be opened. In live systems, this leads to shutdowns, safety risks, and extra labour, which makes frequent or quick checks difficult in places like EV stations, production lines, and critical panels.
To solve this, Volterra Techniks introduced the VT-PM604 in Q4 2025. This portable three-phase power monitor uses flexible Rogowski current probes, so current can be measured without disconnecting cables or shutting down systems. This lets technicians test live installations quickly and safely, making it suitable for routine maintenance and energy audits.
The VT-PM604 supports 3-phase 4-wire, 3-phase 3-wire, and single-phase systems, covering most electrical setups used in India. It measures voltage, current, active and reactive power, energy, demand, power factor, and harmonics, giving a clear view of system performance without the complexity of lab-grade instruments. Harmonic analysis is supported up to the 51st order for both voltage and current, which is useful in systems with EV chargers, variable frequency drives, and solar inverters. This helps teams check distortion and load behaviour in running systems.
For field use, the unit includes a TFT display and an internal lithium battery that runs for up to eight hours, with support for a DC adaptor for longer monitoring. Built-in data logging allows intervals from one second to several hours, and data can be exported in CSV format via USB. An RJ45 port supports PC connectivity for further analysis. Typical uses include EV charging station maintenance, electrical audits in commercial and industrial sites, plant diagnostics, and checks in solar PV and UPS systems. By avoiding fixed CTs, the VT-PM604 makes power monitoring easier where shutdowns are not practical.
