Quick verdict
If your energy management setup needs a panel-mounted power quality meter that can measure voltage, current, frequency, power factor, kW, kvar, kVA, and THD, the GE PQMII-T20-C-A at USD 649.99 is worth serious consideration. Its RS485 Modbus RTU port makes it easy to fold into an existing monitoring network, and the three analog outputs give you a way to feed data into older SCADA or PLC systems.
Who this meter suits
This meter is best for facilities with 1A or 5A current transformer secondaries and direct voltages up to 600 VAC. If that matches your switchgear, you won't need external signal conditioners for the basic measurements.
What stands out from the listed details
The model configuration reveals a lot. The "T20" option means three 4-20 mA analog outputs, so you can bring real-time values to a chart recorder or controller. The "C" option adds four programmable digital/logic inputs, handy for status monitoring or breaker trips. The "A" communications port is RS485 Modbus RTU, a common protocol for building and industrial energy management.
The meter runs on a wide control power range: 90-300 VDC or 70-265 VAC, so it can work in DC-powered substations as well as standard AC panels. The 40-character backlit LCD is straightforward for on-unit readouts. It measures THD, which might be essential if you're dealing with variable-frequency drives and nonlinear loads.
Trade-offs to keep in mind
This is a pre-owned, thoroughly tested, and fully functional unit, per the listing description. Buying used means you should think about the unit's history and integration into your system. The output relays are rated at 8 amps at 250 VAC resistive, which is fine for many signaling tasks, but you'll want to confirm your load meets that rating.
Also note the current inputs are software selectable for 1A or 5A secondaries; you don't have to order a separate version, but you do need to set the configuration correctly. The transducer outputs and digital inputs are included in this configuration, so if you don't need them, a simpler unit might save you money, but the price here reflects a fully loaded option set.
GE PQMII-T20-C-A
The GE PQMII-T20-C-A brings a professional feature set to your power monitoring panel. At USD 649.99, you're getting a used power quality meter with flexible I/O and Modbus connectivity. Choose this if you need the analog outputs and digital inputs for integration with existing control equipment. The main limitation is the used condition - the listing states it is pre-owned, so include your own acceptance test before putting it into service.
Bottom line
For a facility that already uses Modbus RTU and 1A/5A CTs, the GE PQMII-T20-C-A is a strong match. The combination of THD measurement, multiple power parameters, and four digital inputs covers most energy management needs. As long as the used unit passes your inspection, the listed feature set justifies the price.
