KPM312 series three-phase rail-type intelligent power energy efficiency terminal adopts a DIN35mm rail-type installation structure and LCD screen display. It can measure the electrical parameters of 4 three-phase loops, 2nd to 31st harmonics, statistical operation time, etc., and is equipped with 1 RS485 as a standard Communication interface that can realize network management of instruments through Modbus-RTU or MQTT communication protocol. It can also be expanded to 4 channels of switching inputs and 4 channels of relay outputs, and external open-type transformers are easily connected to the construction of renovation projects. KPM312 has the advantages of compact size, high precision, good reliability, and easy installation. It is mostly used in system integration, renovation projects, and projects with limited or inconvenient installation space.
Feature
- 4-channel 3-phase electric parameter measurement such as AC voltage, current, four-quadrant electric energy, active/reactive power, apparent power power factor, frequency, demand, maximum value, etc.
- 1 RS485 communication interface, Modbus-RTU, MQTT, or DL/T645-2007 communication protocol
- High accuracy for U, I, P, active energy, and reactive energy meter
- Programmable voltage and current ratio
- Expandable 4 channels of passive switching input
- Expandable 4-way relay output
- Expandable Lora, WiFi, 4G communication
- Expandable 4 temperature inputs
- 7+1-digit FSTN liquid screen display
Specification
| Working power source | Operating Voltage | AC 85~260VAC |
| Rated power consumption | < 3VA | |
| Input voltage | Rated voltage | 3*220VAC |
| Overvoltage capability | 1.2 times rated voltage allowed, continuous work;
2 times the rated voltage allowed 10S |
|
| Rated power consumption | <0.5VA(per phase) | |
| Measurement range | LN：50~260VAC | |
| Frequency range | 45-65Hz | |
| Input current | Rated current | 5-800A based on CT range |
| Overload capacity | 1.2 times rated current allowed, continuous work;
20 times the rated current allowed 1S |
|
| Rated power consumption | ＜0.75VA/phase（5A）; <0.45VA/phase (1A) | |
| Frequency range | 45-65Hz | |
| Power quality monitor | Harmonic measurement | U/I 2-31st harmonic distortion rate |
| Harmonic distortion rate | Phase voltage, Phase Current | |
| Imbalance rate | Voltage, Current | |
| Measurement accuracy | Voltage | ±0.2%（0.01V） |
| Current | ±0.2%（0.01A） | |
| Active power | ±0.5%（0.01W） | |
| Reactive power | ±2.0%（0.01var） | |
| Power factor | ±0.5%（0.001） | |
| Frequency | ±0.02 (0.01Hz) | |
| Active energy | ±0.5%（0.1kwh） | |
| Reactive energy | ±2.0%（0.1kvarh） | |
| Communication | Communication | RS485, WIFI, 4G, LORA |
| Communication protocol | Modbus-RTU, 1200-38400BPS MQTT |
|
| DI & DO | Digital input | 4-way passive main line contact DI input, internal supply DC24V power supply |
| Relay output | 4-Way DO output, contact capacity 250VAC / 5A, 30VDC / 5A | |
| Working environment | Operating temperature | -25℃ ~ +70℃ |
| Storage temperature | -30℃ ~ +75℃ | |
| Relative humidity | 5% ~ 95% No condensation | |
| Altitude | Not more than 3000m | |
| Electrical
insulation |
Dielectric strength | Power frequency voltage AC 2kV, working time 1 min |
| Insulation resistance | ＞50MΩ | |
| Impact voltage | 5kV (Peak),1.2/50us | |
| Electromagnetic Compatibility | Electrostatic discharge immunity | IEC61000-4-3, level 4 |
| Fast pulse group immunity | IEC61000-4-4, level 4 | |
| Surge immunity | IEC61000-4-5, level 4 | |
| Power frequency magnetic field immunity | IEC61000-4-8, level 4 |
Wiring
Application
- Energy management system integration
- Old project or wireline modification
- Projects with limited space or inconvenient installation
- Measured circuits are near or in one cabinet
