KPM37 OEM Three Phase Wireless DIN Rail Energy Meter (4G/WiFi/LoRa)
⚙️ Rogowiski Coil
🎯 Class 0.5S
- DIN 35mm rail mounting structure, compact size, and easy installation.
- Optional Rogowiski coil input, optional 200A, 600A, 1000A, 2000A, etc.
- 2-31st harmonic calculation& analysis
- Programmable CT/PT, supporting current measurement up to 6000A.
- Optional RS485 / WiFi / 4G/ Lora communication, Modbus-RTU / MQTT protocol
- Time-of-use multi-rate energy consumption measurement, usable for up to 5 rates per day.
- Rich expansion functions, including temperature and leakage monitoring.
- Optional DC24V power supply for option.
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Features
KPM37 Wireless OEM Din Rail Three Phase RS485/4G/LoRa/WIFI Energy Meter
KPM37 three phase wireless iot RS485 LoRa din rail 4G WiFi iot energy meter features a DIN 35mm rail mounting structure and an LCD display, integrating three-phase power parameter measurement, power quality analysis, and time statistics functions. It has the advantages of small size, high accuracy, high reliability, easy installation, etc. Optional RS485, WiFi, 4G, and LoRa communication interfaces are available. It is widely used in retrofitting projects or in locations with limited space and where laying communication cables is difficult.
Functions of KPM37 Wireless 4G LoRa Din Rail Three Phase WiFi Energy Meter
- Communication protocol: Modbus-RTU, DL/T645, MQTT
- Optional function: 4 digital inputs; 2 digital outputs;
- 4 wires temperature measurement; residual current measurement.
- Optional connection: Lora, WiFi, 4G, RS485
- Installation method: DIN rail 35MM three phase energy meter
- Around 1 week offline data storage for wireless communication
- Support CTs and rogowisky coil input
- Measurement: three phase UL-L, UL-N, I, F, PF, P, Q, S, four-quadrant power, etc.
- High accuracy: U Class 0.2; I Class 0.2; P Class 0.5S.
- Active energy Class 0.5S.
- Reactive energy Class 2.0.
Power quality analysis:
- Voltage deviation
- Demand and max&min value
- Voltage/Current imbalance
- Phase angle measurement
- 2-31st harmonics content and THD
Record function:
- 8 sets of alarm records
- 100 Fault alarm record
- 100 digital inputs and outputs SOE event record
- 12-month multi rate power consumption record
- 7 days offline data storage for wireless communication
KPM37 Wireless OEM Din Rail Three Phase 4G/LoRa/WIFI Energy Meter Model
Specification Of KPM37 Wireless OEM Din Rail Three Phase 4G/LoRa/WIFI Energy Meter
| Input voltage | Rated voltage | 3×220V/380V |
|---|---|---|
| Overall power consumption | <2VA | |
| Frequency range | 45~65Hz | |
| Input current | Rated current | 0.2-1 (80) A, max 100A |
| Frequency range | 45~65Hz | |
| Working power source | Operating Voltage | 85-305VAC/70-430VDC, optional DC24V |
| Rated power | <3VA | |
| Input voltage | Rated voltage | 57.7/100VAC,220/380VAC 380V/660V (Customized) |
| Overload capacity | 1.2 times rated voltage allowed, continuous work; 2 times the rated voltage allowed 1second | |
| Power consumption | <0.5VA/phase(rated) | |
| Measurement range | L-N: 10~380VAC, LL: 90~660VAC | |
| Frequency range | 45~65Hz | |
| Input current | Rated current | Default 5A, Input range 1-6A, Optional 1A, Input range 1-1.2A |
| Overload capacity | 1.2 times rated current allowed, continuous work; 20 times the rated current allowed 1 second | |
| Power consumption | <0.75VA/phase (Rated current 5A); <0.25VA/phase (Rated current 1A) | |
| Frequency range | 45~65Hz | |
| Input/Output | Switch input | 4-way passive main line contact DI input, internal supply DC24V power source |
| Relay output | 2-way DO output, Contact capacity 250VAC/5A, 30VDC/5A | |
| Power quality monitor | Harmonic measurement | Voltage/current 2~31st harmonic distortion rate, total harmonic distortion rate |
| Programmable voltage current transformation ratio | Phase voltage, phase current | |
| Harmonic distortion rate (THD) | Voltage, current | |
| Measurement accuracy | Voltage | ±0.2%(0.01V) |
| Current | ±0.2%(0.01A) | |
| Active power | ±0.5%(0.1W) | |
| Reactive power | ±2.0%(0.1var) | |
| Apparent power | ±0.5% (0.1VA) | |
| Active energy | 0.5S (0.1kWh) | |
| Reactive energy | ±2.0%(0.1kvarh) | |
| Power factor | ±0.5%(0.001) | |
| Frequency | ±0.02Hz(0.01Hz) | |
| Communication interface | Communication interface | RS485 / WIFI / 4G / Lora |
| Communication protocol | Modbus-RTU, DL/T645-2007, MQTT, 1200~38400bps | |
| Electrical insulation | Power frequency withstand voltage | AC2kV/min~1mA Input-output-power source |
| Insulation resistance | >50MΩ | |
| Impact voltage | 5kV (Peak), 1.2/50us | |
| Working environment | Operating temperature | -25℃ ~ +70℃ |
| Relative humidity | 5%~95% No condensation | |
| Storage temperature | -30℃ ~ +75℃ | |
| Altitude | No more than 4000m | |
| Electromagnetic Compatibility | Surge (impact) immunity | GB/T17626.5-2008, Level4, IEC61000-4-2, level 4 |
| Fast pulse group immunity | GB/T 17626.4-2008,Level4,IEC61000-4-5, level 4 | |
| Electrostatic discharge immunity | GB/T 17626.2-2006,Level4,IEC61000-4-4, level 4 | |
| Power frequency magnetic field immunity | GB/T 17626.8-2006,Level4,IEC61000-4-8, level 4 |
Appication Of KPM37 Wireless OEM Din Rail Three Phase 4G/LoRa/WIFI Energy Meter
KPM37 Three Phase Energy Meter Triangle system: 2 voltage transformer(PT), 3 current transformers(CT) ( device set to P3L3)
For system secondary line voltage <265V
KPM37 Wireless OEM Din Rail Three Phase 4G/LoRa/WIFI Energy Meter Download
Expert Technical Q&A for KPM37 Wireless Energy Meter
Q1: How does the KPM37 solve the challenge of remote data transmission in existing industrial facilities?
A: The KPM37 energy meter is specifically designed for industrial retrofitting where rewiring is impractical. It features a standard RS485 (Modbus-RTU) interface for local integration and supports modular wireless upgrades including 4G, WiFi, and LoRa. This allows engineers to transmit real-time power data directly to the cloud or a central EMS without laying kilometers of communication cables, significantly reducing installation time and costs.
Q2: Is the KPM37 suitable for high-precision billing and power quality analysis?
A: Absolutely. The KPM37 energy meter meets the Class 0.5S accuracy standard (IEC 62053-22), making it reliable for internal sub-billing and energy cost allocation. Beyond basic metering, it provides deep insights into power quality by monitoring total harmonic distortion (THD) and individual harmonics up to the 31st order, helping facility managers identify potential risks to sensitive industrial machinery.
Q3: Can I use the KPM37 in a multi-loop monitoring environment with limited cabinet space?
A: Yes. The KPM37 energy meter utilizes a compact DIN-rail mount design. For multi-loop requirements, it can be paired with external split-core CTs (Current Transformers), which allows for non-intrusive installation. This “plug-and-play” compatibility with various CT ratios makes it the preferred choice for dense electrical distribution boards where space is at a premium.
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