Single Phase STS keypad Smart Prepaid Energy meter 

Main Features of Prepaid Energy Meter:

Energy Measurement

Total and time-sharing forward active & reactive energy measurement

Total and time-sharing reverse active & reactive energy measurement

Save last one to sixteen months energy data

20 digit Standard Transfer Specification(STS)

Credit data transfered from a point of sale (POS) or vending system is made into a numeric token  in a 20 digit number using the Standard Transfer Specification (STS) encryption techniques, which comply with IEC62055 protocol

 Load control function

When the residual energy is 0 or the allowable overdraft that both sides agreed, this meter will send out power-off signal to have load switch cut off power. The power will be recovered automatically after inputting new purchased energy amount.

 Programmable low credit warning

The meter can be programmed for setting user credit warning threshold, When the meter’s residual energy is equal to credit warning threshold, the meter will start the audio & video warning function in a way of warning light flashing

Tamper detection

With event recording function (including cover-opening event, tamper event and power failure event)

Optical port interface

Communication standards DL/T645-2007, 1200bps for communication

Support IEC62056-21 protocol

RS-485 serial interface

Communication standards DL/T645-2007, 2400bps for communication

Support IEC62056(DLMS/COSEM) protocol

LCD display

Number of digits value field Up to 8

Digit size 4x10mm

Picture show of prepaid energy meter:

Certificats of prepaid energy meter :