Compere KPM33 – Three-Phase DIN Rail Smart Energy Meter (WiFi / 4G / LoRaWAN)
 
The Compere KPM33 Three-Phase DIN Rail Smart Energy Meter is a high-precision, multifunctional energy monitoring device designed for industrial, commercial, and microgrid applications.
 
Built with an advanced integrated DSP measurement chip, the KPM33 delivers highly accurate metering, prepaid functionality, four-quadrant energy statistics, and flexible wireless communication options.
 
It supports automatic remote data collection, reducing manual meter reading errors and enabling precise electricity billing and load control.
 
Key Features:
High-precision measurement using integrated DSP technology
Voltage accuracy: Level D
Active Energy accuracy: Level B (Class 1.0)
Power accuracy: Level B
Measures:
Three-phase voltage and current
Active, reactive, and apparent power
Active, reactive, and apparent energy
Power factor
Frequency
Four-quadrant energy statistics
Multi-rate energy tracking
Up to 5 rates per day
14 time zones per year
24 time periods per day
Up to 8 time period tables
12-month frozen energy consumption data record
Prepaid functionality with built-in magnetic latching relay
Remote charging and load control support
Energy data network disconnection and continuation function
Storage of up to 7 days of 15-minute interval energy data
Automatic data recovery after network reconnection
Direct current input: 0.2–80A
LED pulse output
1 channel passive optocoupler pulse output
Built-in real-time clock with maintenance-free battery
Compact 35mm DIN rail mounting for easy installation
 
Communication Options:
The KPM33 supports multiple communication methods to suit various project requirements:
RS485 (Standard) – Modbus-RTU protocol
WiFi (Optional)
4G LTE (Optional – CAT1 module)
LoRaWAN (Optional)
 
Important: Only one wireless communication option (WiFi / 4G / LoRa) can be selected per meter.
 
Supported communication protocols:
Modbus-RTU
MQTT (optional)
Modbus-RTU transparent transmission
 
Meters with WiFi or 4G include built-in communication hardware – no external modem required.
 
Prepaid & Load Control Functionality:
Integrated magnetic latching relay for remote load control
Supports prepaid metering with remote top-up
Automatic power on/off control
Ideal for tenant billing, energy management, and microgrid systems
 
Technical Specifications:
Measurement Parameters
Three-phase voltage and current
Active, reactive, and apparent power
Power factor
Frequency
Active and reactive energy
Four-quadrant energy statistics
2–31st order harmonic monitoring
 
Input Ratings:
Rated voltage: 3 × 220V / 380V
Rated current: 0.2–80A (direct input)
Frequency range: 45–65 Hz
 
Accuracy:
Voltage: ±0.2%
Current: ±0.2%
Active Power: ±0.5%
Reactive Power: ±2.0%
Active Energy: ±0.5%
Reactive Energy: ±2.0%
Power Factor: ±0.5%
Frequency: ±0.02 Hz
 
Communication:
RS485 (standard)
Optional WiFi / 4G / LoRa
Protocols: Modbus-RTU, MQTT
Baud rate: 1200–19200 bps
 
Electrical Characteristics:
Operating Voltage: 85–305VAC / 70–430VDC
Power Consumption: <2VA
Power frequency withstand voltage: AC 2kV/min
Insulation resistance: >50MΩ
Impact voltage: 5kV (1.2/50µs)
 
Environmental Specifications:
Operating Temperature: –30°C to +75°C
Storage Temperature: –25°C to +70°C
Relative Humidity: 5% – 95% (non-condensing)
Maximum Altitude: ≤4000 m
 
Mechanical & Installation:
Standard 35mm DIN rail mounting
Compact modular design
Dimensions: 126 × 100 × 76 mm
LCD display with backlight
 
Applications:
Prepaid energy billing systems
Microgrid power measurement
Automatic meter reading
Remote load control
Industrial and commercial energy management
Building automation systems
 
 
Choose the model best suited to your communication requirements:
KPM33-RS485 – Standard Modbus-RTU version
KPM33-WiFi – Built-in WiFi communication
KPM33-4G – Integrated 4G LTE communication
KPM33-LoRa – LoRaWAN communication
KPM33B – Prepaid load control version
KPM33D – Dual-source monitoring version
(Custom configurations available – specify options when ordering)
 
Key Advantages:
High measurement accuracy
Prepaid functionality with remote control
Multiple wireless communication options
Data continuity after network loss
Compact DIN-rail design
Ideal for smart metering and IoT applications
Reliable performance in harsh environments
 
Lead Time:
3-5 Days