Product Overview
The NPM96ZH/NPM72ZH meters are designed and manufactured using the latest microprocessors and digital signal processing technology. The 320*240 color large screen Chinese display can fully measure a variety of power parameters, and cooperate with other electrical components to realize primary circuit protection and remote data acquisition and control. Use MODBUS-RTU communication protocol via the RS-485 communication interface according to the need, and form the background network monitoring system.
Product Features
- The 320*240 color large screen Chinese display allows the users to view and set the data easily and conveniently.
- The user can intuitively view the total current and voltage harmonics, the total even and odd harmonics amount of current and voltage, and the unbalance rate for current and voltage.
- The key function interface navigation makes operation more convenient and realizes function of similar phone navigation button, so that the instruments are more intelligent.
- Multi-level setting interface, users can directly select the items of interest to set, so that the setting is more convenient.
- The sliding window demand is selected for use by the meter, under which the active demand, reactive power demand and apparent power demand can be measured.
- View the system time, and view the running time of the power meter to date, and judge if any outage occurs before according to the time.
- Directly view the three-phase current/voltage 2nd ~31st harmonic histogram.
- View the maximum and minimum values of three-phase current and voltage and the time of occurrence.
- View the last 20 SOE records (switch value action status and occurrence time).
- Realize remote data acquisition and control.
Main Technical Parameters
| Performance | Parameters | ||
|---|---|---|---|
| Display method | True color Chinese LCD | ||
| Input signal | Voltage | Network | Single phase, three-phase four-wire (three-phase three-wire) |
| Rating value | AC100V、400V | ||
| Overload | 1.2 times for long term overload; 2 times for short term | ||
| Power consumption | <1VA(every phase) | ||
| Impedance | >300kΩ | ||
| Accuracy | True RMS measurement, accuracy class 0.2 | ||
| Current | Rating value | AC1A、5A | |
| Overload | 1.2 times for long term overload; 10 times for instantaneous load (5s) | ||
| Power consumption | <0.4VA(every phase) | ||
| Impedance | <200mΩ | ||
| Accuracy | True RMS measurement, accuracy class 0.2 | ||
| Measurement display | Frequency | 40～65Hz, accuracy 0.05Hz | |
| Power | Active, reactive, apparent power, accuracy class 0.5 | ||
| Electric energy | Four quadrant metering, active power accuracy 0.5, reactive power accuracy class 1.0 | ||
| Display | All Chinese LCD display, programmable setting, display content can be switched or cyclically display | ||
| Operating power | Scope of Work | AC 85V～265V / DC 90V～300V | |
| Power consumption | ≤5VA | ||
| Extension function | Communication Interface | RS485 (for expansion into dual 485, consult with the manufacturer), MODBUS-RTU protocol | |
| Switch interface | DI passive dry contact input, DO output (DO can be set over-limit alarm output) | ||
| Pulse output | 2 way electric energy pulse output, pulse constant can be set | ||
| Transmission output | DC 4 mA～20mA 0.5 class | ||
| Environment | Operating Environment | －10～60℃ Humidity scope: 5～95% (non-condensing) | |
| Storage environment | －40℃～85℃ | ||
| Safety | Withstand voltage | Among input, output, power supply >2kV | |
| Insulation | Input, output, power supply to shell >100MΩ | ||
| Overall dimensions | Frame size | 96×96mm，72×72mm | |
| Opening size | 92×92mm，68×68mm | ||
