Description
Overview of digital multifunction power meter
- The multifunction & multifunctional power meter supports programmable measurement, display, digital communication and pulse transmission output.
- It realizes power parameter measurement, energy metering, data display, collection and transmission.
- Widely used in substation automation, distribution automation, intelligent buildings and enterprise power measurement, management and assessment.
- It has 0.5-level measuring accuracy for voltage and current, with on-site LED display and remote RS-485 interface based on MODBUS-RTU protocol.
Multifunction power meter instructions
| Parameter Item | Specification |
|---|---|
| AC Voltage Sampling Range | 0-400V; external voltage transformer required for sampling voltage over 400V |
| AC Current Sampling Range | 0-5A; external current transformer required for sampling current over 5A |
| Harmonic Measurement Range | 2nd to 31st order harmonics of phase voltage & phase current, range: 0.01%~99.99% |
| Total Harmonic Distortion (THD) Range | 0.1%~999.9% |
| Metering Sampling Rate | 1.0s per time |
| Harmonic Measurement Sampling Rate | 0.5s per time |
| Metering Accuracy | ±0.5%FS |
| Harmonic Measurement Accuracy | ±0.05%FS |
| Display Mode | LED display |
| Current Loop Input Power Consumption | < 0.5VA |
| Voltage Loop Input Power Consumption | < 0.2VA |
| Working Power Supply | AC220V, AC/DC 89-265V; system power consumption < 0.3VA |
| Alarm Output | Independent relay output; contact capacity: 250Vac/5A, 30Vdc/5A |
| Transmission Output | 4-20mA analog output (switchable between 4-20mA and 0-20mA); accuracy ±0.5%FS; load capacity <900Ω; common-source output |
| Communication Interface | RS485 serial communication, supporting MODBUS-RTU protocol |
| Digital Input | Passive dry contact, with optocoupler isolation |
| Electrostatic Discharge Immunity | Air discharge >8KV, Contact discharge >4KV |
| Surge Immunity | >4KV |
| Electrical Fast Transient Burst Immunity | >4KV |
| Power Frequency Withstand Voltage | >2KV |
Interface Display (Partial)
Category
- 100a dc digital multifunction power meter
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- lcd multifunctional power meter
- multifunction dc power meter
- multifunction meter cos power
- multifunction digital power meter
- dc multifunctional wireless digital bi-directional voltage current power meter
Classification & Selection of Digital Meters
| Meter Type | Main Measured Parameters | Signal Input | Typical Application |
|---|---|---|---|
| Single-phase Voltmeter | AC Voltage | Direct 0~400V / PT access | Low-voltage distribution cabinet |
| Single-phase Ammeter | AC Current | Direct 0~5A / CT access | Motor control cabinet |
| Single-phase Power/Energy Meter | Voltage, Current, Active Power, Energy | CT+PT | Civil power distribution |
| Three-phase Multifunction Power Meter | V, I, P, Q, kWh, 2~31st Harmonic, THD | CT+PT | MV switchgear, PV station, substation |
| Digital Power Factor Meter | Power Factor | CT+PT | Reactive power compensation cabinet |
FAQ
Q1: What parameters can this multifunction power meter measure?
A: It measures AC voltage, current, power, energy, 2nd~31st harmonic and THD. External CT/PT is needed for signals exceeding 5A/400V.
Q2: What communication does it support?
A: Standard RS485 port with Modbus-RTU protocol; optional switchable 4–20mA/0–20mA analog transmission output.
Q3: What is the power supply range?
A: AC220V or universal AC/DC 89~265V, low overall power consumption below 0.3VA.
Q4: How about measurement precision?
A: Basic metering accuracy ±0.5%FS, harmonic accuracy ±0.05%FS.
Q5: Does it have alarm function?
A: Yes, independent relay alarm output, contact rating: 250VAC/5A, 30VDC/5A.
Q6: Is the meter resistant to harsh electromagnetic interference?
A: It passes strict EMC tests: air ESD＞8kV, contact ESD＞4kV, surge & EFT＞4kV, dielectric withstand＞2kV.
Q7: Where is it commonly installed?
A: Widely fitted in switch cabinets, distribution boxes, photovoltaic and wind power projects.
xiao zhang –
Compact digital meter precisely measures voltage, current and power parameters with clear digital readout. Low power consumption and robust anti-interference suit switchgear, PV and distribution cabinet installation.
Jack –
Protection logic is easy to customize with the provided software.