Control
Relay & load management
Smart metering · External CT
NV30CT Polyphase network meter
Three-phase metering for external current transformers, combining revenue data, power quality and three independently controlled relays.
Open datasheetPDF · 1.9 MB
200kHzAnalog sampling
5 ARated secondary current
IP54Ingress protection
3Relay channels
20 yrData retention
Connect to the bigger picture.
The NV30CT supports solid-core and split-core current transformers rated up to 5 A on the secondary, with improved accuracy at lower load currents.
Three control relays provide switchgear signalling and actuator control. Ripple and cloud-based services support flexible load management, while waveform capture and impedance estimation help teams investigate supply quality.
Use one connected asset to bring revenue metering, power analytics and remote control into the Nexbe cloud platform.
Quality
IEEE & IEC reporting
Faults
Waveform analysis
Features & benefits
Revenue-grade metering with confirmed data delivery.
Dependable energy records for revenue collection and billing.
Three control relays for switchgear signalling and actuator control.
Coordinate loads through traditional 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.
Flexible CT installations
Select solid-core or split-core current transformers to suit your installation. Programmable ratios support 50-1,000 A primary currents with 5 A secondaries.
Technical specification
Show full technical specification
Physical & wiring
| Wiring form | 3-phase 4-wire + 3 CTs + 3 × 16 A relays |
|---|---|
| Security | Security tags & tamper detection |
| Dimensions | 165 × 218 × 79 mm |
| Net weight | 1.4 kg |
Secondary current & CTs
| Starting current | 20 mA |
|---|---|
| Rated current | 5 A |
| Maximum current | 6 A |
| VA burden | < 0.5 VA |
| CT ratio | 5 A secondary / 50-1,000 A primary (programmable) |
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 | 1-10,000 imp/unit |
Accuracy & approval status
| Accuracy class | 0.5% active · 1% reactive |
|---|---|
| IEC, AS & EN approvals | Pending, as listed in the supplied datasheet |
Product downloads
Preview PDF Smart metering
NV30CT
External-CT network metering with three control relays and 200 kHz analog sampling.
PDF · 2 pages · 1.9 MBOpen PDF
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