Integrated Power Monitoring Device (ZSA)
Power monitoring device with full-wave and harmonic analysis, independent bidirectional energy metering, event and extreme-value logging, and an IP52 front panel.
Overview
Key Features
Full-wave and harmonic analysis
Three-phase voltage, current, power and individual harmonic parameters.
Independent bidirectional energy
Forward and reverse active and reactive energy accumulated separately.
Digital inputs and outputs
2DI+2DO or 7DI+2DO, programmable.
High-speed MODBUS communication
RS485 with physical isolation, 1200~38400bps.
Event and extreme logging
Events, extremes, maximum demand, 24-hour curve, 30-day peaks.
Dot-matrix LCD
26 pages of electrical parameters for on-site checking.
Technical Data
| Wiring | Three-phase three-wire, three-phase four-wire |
| Voltage range | AC 5~500V, overload 1.2 times continuous / 2 times for 1s |
| Current range | AC 20mA~5A, overload 1.2 times continuous / 10 times for 5s |
| Frequency | 45 ~ 65Hz |
| Power supply | AC220V / AC85~265V / DC100~300V, ≤5VA |
| Energy pulse | 1 channel, constant 8000imp/kWh |
| Communication | RS485, MODBUS-RTU, 1200~38400 |
| Digital output | 3A/250VAC, 3A/30VDC |
| Measurement class | Electrical quantities 0.5; active energy 0.5; reactive energy 1.0 |
| Display | Dot-matrix LCD, 26 pages of electrical parameters |
| Operating temperature | -10℃ ~ +45℃ |
| Degree of protection | Front panel IP52 |
Models & Selection
| Parameter | ZSA-31331-R | ZSA-31333-R |
|---|---|---|
| Wiring | Three-phase three-wire / three-phase four-wire | Three-phase three-wire / three-phase four-wire |
| Digital I/O | 2DI+2DO | 7DI+2DO |
| Communication | RS485 MODBUS-RTU | RS485 MODBUS-RTU |
| Panel size | 72×72mm / 96×96mm | 72×72mm / 96×96mm |
Model naming rule：ZSA-31331-R ZSA-31333-R
Installation
FAQ
Which electrical parameters can be measured?
Three-phase voltage, current, power, power factor and frequency are measured, together with total harmonics and individual harmonic components, presented as 26 parameter pages on the display.
How do I choose between the two models?
ZSA-31331-R provides 2DI+2DO and ZSA-31333-R provides 7DI+2DO. The choice follows the number of remote control and remote measurement points required by the installation.
What is the energy metering accuracy?
Electrical quantities and active energy are class 0.5, reactive energy is class 1.0, and frequency accuracy is ±0.2Hz. The energy pulse output has a constant of 8000imp/kWh.
What are the installation and environmental conditions?
The device mounts through a 72×72mm or 96×96mm panel cut-out. The front panel is rated IP52 and the operating temperature is -10℃~+45℃.
What certification applies and how is pricing provided?
Certification is held through a CE / CMA / CNAS accredited laboratory. Price is quoted per model and option; Request a quote with the model code and the DI/DO configuration required.