DDSY1598 Smart Prepaid Energy Meter
DDSY1598 Single Phase Smart Prepaid Energy Meter is a digital electricity meter that uses the Standard Transfer Specification (STS) open protocol to manage prepaid electricity billing while incorporating “smart” two-way communication networks. Just like the water meter, it allows users to buy electricity in advance using a secure 20-digit encrypted token, but it also adds advanced grid-management features like remote reading and instant power cut-off alerts.

I.  How DDSY1598 Single Phase Smart Prepaid Energy Meter Works?

i.  The STS Encryption: When you buy electricity (via mobile money, an app, or a kiosk), the system generates a unique 20-digit token based on your specific meter serial number. Even if someone intercepts that code, it is completely useless to any other meter.

ii. Loading Credit: You type the code into a keypad on the meter, or onto a wireless Customer Interface Unit (CIU) inside your house.

iii.The “Smart” Layer: Traditional STS meters are completely offline. A Smart STS meter includes a wireless radio (like GPRS, 4G, NB-IoT, or LoRaWAN). This means the meter can talk back to the utility company in real-time, allowing for automatic token loading over-the-air without typing anything, remote tamper alerts, and live monitoring of electricity consumption.

II. Key Features and Benefits of DDSY1598 Single Phase Smart Prepaid Energy Meter

• Zero Debt Risk: Utilities get paid upfront, and consumers can never accidentally run up a massive, unexpected electricity bill.
• Over-the-Air Top-Ups: Because it is a smart meter, when you buy credit on your phone, the utility can push the token directly to your meter over the cellular or IoT network, bypassing the need to manually punch in 20 digits.
• Tamper & Theft Detection: The meter instantly alerts the utility company if the case is opened, if a magnetic bypass is attempted, or if wires are illegally hooked up.
• Flexible Tariffs: Utilities can remotely update electricity rates or implement time-of-use pricing (making electricity cheaper during off-peak hours).
• Split Type Design: The actual meter can be locked securely on a pole outside the property to prevent tampering, while the user keeps the sleek keypad interface (CIU) inside the house to check their remaining balance.

III.Functions of DDSY1598 Single Phase Smart Prepaid Energy Meter 

• Power outage detection and recording

• Purchase record

• When meter cover is open, meter’s relay trips off.

• When terminal cover is open, meter’s relay trips off.

• When communication cover is open, meter’s relay trips off.

• Over voltage

• Under voltage

IV. Advantages of DDSY1598  Single Phase Smart Prepaid Energy Meter

• Eliminates manual meter reading
• Prevents electricity theft
• Helps in budget management
• Reduces billing disputes
• Improves energy efficiency

Function&Feature

Programmable low credit alert & have an alarm based on a minimum credit threshold. The meter can be programmed to set user credit alert threshold.
When the remaining credit in the meter is exhausted, the relay built into the meter will automatically cut off the power to the load. Customer’s power will be restored after recharging.
The 8-digit LCD screen displays the acceptance or rejection of a 20-digit token.
When you open the terminal cover or the meter cover when the power is on, the meter cuts off the power supply and signals the anomaly (on the LCD screen and by LED). You need an anti-fraud code (maintenance tokens to reconnect the integrated contactor).
Neutral measurement is optional
In the case of detection of a bypass current, the meter will integrate the highest value of the current for the measurement of the active energy.
Recent 10 times purchase charging TOKEN with time flag can be recorded and checked.
Programmable lower voltage or higher voltage threshold.
Alternate prepayment mode to postpaid by special TOKEN code.

Main Parameters

Item Description
Type Single phase two-wire
STS Prepayment Meter Single-phase smart prepaid energy meter uses electronic technology to measure energy and having metering technology.
Standard IEC62052-11,IEC62053-21,IEC60068-2-27, IEC62055-41, IEC62056-21, IEC60068-2-6
Rated Voltage 230V (-40%, +15%)
Current 5( 60)A or 5( 100)A
Active Class 0.5 or 1.0
Frequency 50Hz±5%
Starting Current < 0,4%*Ib (CosФ = 1)
Meter Constant 1000imp/kWh
Tariff Index 1
Displayer Backlit LCD: 6+2
Wiring Symmetrical connection: LNNL
High Voltage 1,2/50 µs (IEC1036) 6kV
Resistance to external magnetic induction 0,5mT
Communication Interface Local: Optical port, RS485 or M-bus ; Uplink: PLC, RF or GPRS module
Communication mode IEC62056-21 mode E
Communication protocol DLMS/COSEM
Housing material Unbreakable, non-combustible, flame retardant, non-fire propagating, heat-resistant molded plastic material
Protection Index IP54 of IEC60529
Installation BS5685-1:1997
Operating Temperature -25°C~70°C
Stockage Temperature -25°C~85°C
Humidity <=95%
Life Span 20 years
Dimension 203x125x58mm