Control
Relay & load management
Smart metering · Residential
NV33 Polyphase revenue meter
Revenue metering, power quality and load control in one meter. Built for three-phase supplies or single-phase installations with two controllable loads.
Open datasheetPDF · 2.7 MB
200kHzAnalog sampling
100 AMaximum current
IP54Ingress protection
2Load-control channels
20 yrData retention
One meter. More possibilities.
The NV33 is a flexible three-element monitoring meter with independently controlled relays. Configure it for single-, two- or three-phase supplies, with load control to suit the installation.
In a single-phase configuration, two remote load-control channels support applications such as hot water and EV charging. Traditional ripple control and cloud-based services give retailers and network operators flexible ways to manage demand.
Connected to the Nexbe cloud platform, the meter brings revenue data, power quality and asset visibility together.
Quality
IEEE & IEC reporting
Faults
Waveform analysis
Features & benefits
Revenue-grade metering with confirmed data delivery.
Dependable energy records for revenue collection and billing.
Two remote relay-control channels in residential single-phase installations.
Manage flexible loads using ripple control or cloud-based services.
100 kHz waveform capture and spectrum analysis, including sub-harmonics.
Investigate voltage and current disturbances remotely with high-resolution waveform data.
IEEE 1159.3 and IEC 61000-4-30 power quality reporting.
Bring power quality information into existing reporting and analysis systems.
Supply impedance estimation for connection integrity monitoring.
Identify degraded supply quality and potentially unsafe electrical connections earlier.
Technical specification
Show full technical specification
Physical & wiring
| Wiring forms | 1-phase 2-wire2-phase 3-wire3-phase 4-wire |
|---|---|
| Security | Security tags & tamper detection |
| Dimensions | 165 × 218 × 79 mm |
| Net weight | 1.6 kg |
Current & relays
| Starting current | 40 mA |
|---|---|
| Base current | 10 A |
| Minimum current | 0.5 A |
| Maximum current | 100 A |
| Supply-control switch | 100 A · IEC 62055-31 UC3 |
| Load-control switch | 50 A · IEC 62055-31 UC3 |
Voltage
| Nominal | 240 V (L-N) / 415 V (L-L) |
|---|---|
| Operating | 184-264 V (L-N) |
| Impulse | 10 kV |
| Surge | 4 kV |
Environment
| Operating temperature | -25 °C to +60 °C |
|---|---|
| Storage temperature | -40 °C to +70 °C |
| Relative humidity | 75% mean |
| Ingress protection | IP54 |
| Protective class | II |
Power quality & sampling
| Analog sampling | 200 kHz |
|---|---|
| Revenue sampling | 20 kHz |
| Waveform capture | 100 kHz for 1 cycleor 20 kHz for 1 cycle |
| Harmonics | Sub-, odd, even and inter-harmonics to the 200th |
| Parameters | Vrms, Irms, PF, Hz, kW, kVA, kvar, THD, impedance |
Ripple control
| Protocols | Decabit, Telenerg |
|---|---|
| Carrier frequency | 120-2,000 Hz |
| Bandwidth | 1-50 Hz |
| Signal level | (0.1-3.0 V) to (1.0-20 V) |
Reporting
| Revenue | HHR & TOU in HERM and EIEP3 formatsActive & reactive, import & export |
|---|---|
| Power quality | IEEE 1159.3 (PQDIF)IEC 61000-4-30 |
Data memory
| Energy storage | 6 MB |
|---|---|
| Event storage | 1 MB |
| Register memory | > 48 months |
| Retention | 20 years |
| Encryption | 256-bit AES |
Communications & timing
| Wi-Fi | 2.4 GHz 802.11 b/g/n |
|---|---|
| Cellular | LTE CAT-M1 (eSIM) |
| Clock accuracy | < 5 s/month, unsynchronised |
| Synchronisation | NTP server when connected |
| Battery backup | 10 years at 23 °C, unpowered |
Meter constant
| Active | 1 imp/kWh |
|---|---|
| Reactive | 1 imp/varh |
| Programmable | 1-1,000 imp/unit |
Accuracy & standards
| Accuracy class | 1% active · 2% reactive |
|---|---|
| IEC | 62052-11, 62052-3162053-21, 62053-2362054-21 |
| EN | 50470-1, 50470-3 |
Product downloads
Preview PDF Smart metering
NV33
Polyphase revenue metering, 100 A maximum current and flexible residential load control.
PDF · 2 pages · 2.7 MBOpen PDF
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