NewTrend · digital AC active power meter
Product overview
The 91-W is a compact single-phase AC active power meter with a five-digit red LED display. It reads active power from 0 to 30000W using the measured voltage input and the supplied 100A current transformer. The panel face measures 45 × 45mm, with a 38mm overall depth.
Technical specifications
| Model | 91-W |
|---|---|
| Measured quantity | Single-phase AC active power |
| Power range | 0–30000W |
| Current measurement | Through supplied 100A CT; illustrated AC 0–99.9A reference |
| Display | 5-digit red LED |
| Display below 10000W | 0.0–9999.9W |
| Display at/above 10000W | 10000–30000W |
| Measurement accuracy | 1% ±2 digits |
| Measurement speed | Approximately 2 readings per second |
| Voltage input | AC 40–300V |
| Supply | Self-powered from the measured AC input |
| Overall dimensions | 45 × 45 × 38mm |
| Mounting | Panel mounting with rear fixing studs |
| Rear dimension references | 34mm terminal-area width; 3mm fixing-stud reference |
| CT connection | White secondary connector to the white socket on the meter rear |
| Voltage connection | Black screw terminals on the rear |
| Included accessory | One 100A current transformer |
| Illustrated CT opening | 15mm |
Display and measurement behaviour
The red display automatically changes resolution with the active-power reading: below 10000W it uses the 0.0–9999.9W format, and from 10000W upward it displays integer values up to 30000W. The original specification gives 1% ±2 digits accuracy and approximately two readings per second.
Wiring and measurement input
Connect the measured AC voltage to the black rear screw terminals. Plug the supplied CT secondary connector into the white rear socket and pass the monitored load conductor through the CT opening, following the original connection illustration. The CT is physically separate from the panel instrument in the supplied photographs. The source calls it “built-in” in one passage, while the wiring and accessory descriptions show this external supplied CT.
Dimensions and panel installation
The original outline shows a 45mm square front, 38mm overall depth, a 34mm rear terminal-area reference and a 3mm fixing-stud reference. Use the rear studs and nuts to secure the meter to the panel. These references are preserved as shown; the rear width is not presented as an independently verified panel-cutout specification.
Applications and included equipment
Typical uses include active-power monitoring in industrial equipment, commercial electrical panels and residential systems. The original package reference includes one 100A CT. The instrument indicates active power in watts; the supplied material does not identify a cumulative kWh function.
