Device Overview

  • The Powersense DC unit is designed to monitor the power consumption of up to five 48V DC rail power supply circuits. 
  • The current transducers allow for simple installation without the need to disrupt the monitored circuits. 
  • The measured voltage is common for all of the five current transducer sensors. 
  • The power voltage is connected to the input terminal (positive pole on the left). 
  • Values measured every 5s (other frequencies are possible as depending on requirements. 
  • The screw terminal is detachable for convenient connection of the input wires.
  • The power is calculated as a product of measured current and voltage. 
  • Possibility of manual calibration of DC transducers for better precision. 
  • There are two LED indicator lights on the transmitter. A green LED indicates the presence of power voltage and a flashing red LED indicates operating status. 
  • The Power supply is protected from incorrect installation. If installed at the wrong polarity, the unit will be protected from shorting out. 



Technical Parameters

  • Power supply from monitored DC rail, acceptable voltage 24V..55V DC
  • Protection against the wrong polarity of the power supply
  • The maximum current through DC transducers: 50A
  • The orientation of DC transducer against the DC wire direction is irrelevant; the absolute value of current is measured
  • Measurement of DC voltage and current and power
  • Radio band 433 MHz, range up to 100m, depending on the shielding of walls and electromagnetic interference
  • Measurements every 5 seconds
  • DC rail voltage indicated on the Homebase display
  • The transmitter is intended for interior use, keep away from moisture, water, snow or ice



Examples of Usage

  • Photovoltaics - monitoring of DC output, individual circuits
  • Telecom System power usage monitoring (for ex. BTS tower power usage monitoring)
  • Data Centers - UPS system battery health and power usage monitoring
  • Battery installations - monitoring of charging and discharging
  • Base Transceiver Station (BTS) - monitoring of radio equipment



Technical Specifications

Product
                                                                        Powersense DC
Part
Transmitter without probes
                                    Transmitters with removable probes              
Model
EHT1
EHT1-CLIP_50
EHT1-CLIP_100
EHT1-CLIP_400
Article number
TBD
TBD
TBD
TBD
Dimensions
110 x 80 x 26 mm
37 x 33 x 20 mm (without cable)
61 x 60 x 16 mm (without cable)
100 x 100 x 25 mm (without cable)
Weight
TBD
21 g
65 g
300 g
Material
plastic
plastic
plastic
plastic
Protection
IP20
IP20
IP20
IP20
Temperature
-20 to 60 °C
-20 to 60 °C
-20 to 60 °C
-20 to 60 °C
Humidity
< 80 %RH non-condensing
< 80 %RH non-condensing
< 80 %RH non-condensing
< 80 %RH non-condensing
Interface
5x probe port (RJ-12)
1x port (RJ-12)
1x port (RJ-12)
1x port (RJ-12)
Antenna

internal



Power supply
24 to 55 VDC from monitored rail
from transmitter
from transmitter
from transmitter
Consumption
< 2 W



Radio protocol
proprietary protocol Chirp 433 MHz (868 MHz optionally)



Built-in sensors
voltage
DC current
DC current
DC current
Resolution of metering
1 W



Accuracy of metering
± 2%



Range of metering
5x < 400 A
< 50 A
< 100 A
< 400 A
Conversion constant