Digital Power Meter

Model Number

RTM300

The RTM 300 provides full scale ±0.2% class high accuracy measurements of voltages, currents, power, energy, power factor, frequency, demand, maximum/minimum, THD, and harmonic analysis, and digital input/output channels in power system. Saving various events and power factor control are also possible. A variety of information about power quality, such as harmonic analysis, THD, vector diagram is displayed on GLCD screen with high visibility.

The device is applied to the advanced applications, such as power quality monitoring and analysis.

The RTM 300 supports RS485 communication. PowerDX^TM software allows you to monitor and setup the device on communication network.

Features

Measurements

• 128 sampling rate, sampling/cycle
  
• Full Scale ± 0.2% class
  
• 12bit AD Converter
  
• Harmonic analysis[1 ~ 63rd]
  
• Vector diagram, K factor, Crest factor
  
• Demand measurements
  
• Maximum hold of voltages, currents, power
  
• Minimum hold of voltages
  
• Phase voltages[R, S, T]
  
• Line to line voltages[RS, ST, TR]
  
• Phase currents[R, S, T]
  
• kW, kVar
  
• MWh, MVarh
  
• Power factor
  
• Frequency

Functions

• Power quality[harmonic analysis]
• Power factor control, event recorder
  
• Harmonic distortion capability
  
• Auto frequency tracking of input signal
  
• Independently insulated input signal
  
• Rail to rail analog input having linearity
  
• High speed saving of SPI-type FRAM
  

Communications

• RS485 port
  
• Modbus RTU protocol
  
• Auto interface with PowerDX software
  

Digital I/O

• Digital input, 11 channels, wet contact[DC110V]
  
• Digital output, 11 channels, dry contact
  
• Digital output, mode selection[pulse or latch]
  
• Digital output, pulse time selection<

• DC 110V
  
• AC 85 ~ 265V
  

Applications

Basic Metering

The RTM 300 provides full scale ±0.2%high accuracy measurements for power system parameters[voltages, currents, power, energy, power factor, frequency, and demand], supplemented by a variety of power quality in power system. Recently most of power system environments comprise industrial loads with non-linearity generating many harmonics. However, the RTM 300 guarantees high accuracy measurements in the power system distorted with harmonics.

Online Monitoring/Control

RTM 300 provides a variety of information about power quality, such as harmonic analysis, event recoder, k factor, crest factor, vector diagram, and etc. This makes it possible to analyze and take advantage of the quality information of power system.

Power Management

The RTM 300 has a RS485 port and supports Modbus RTU protocol. Users easily build online power monitoring system by PowerDX software or any other automation programs. Particularly the digital inputs and outputs of the RTM 300 make it possible for users to recognize the information of the digital contacts[OCR, OCGR and etc.] and control the digital output channels on communication.

Remodeling

The electrical energy data from the meters offers users the information for management and analysis of energy usage, adapted to operate or plan the power facilities of energy suppliers and consumers recently or in the near future. Particularly demand measurements can be used as principal data to reduce energy cost..