PRODUCTS & SERVICE
STS Prepayment Energy Meter
Three-Phase Integrated STS Energy Meter
Three-Phase STS Prepayment Keypad Energy Meter

DTSY541 integrated three phase keypad prepayment meter is the latest one-way prepayment meter according to IEC 62053-21 and IEC 62055-31/41/51. The data transmitting is according to Standard Transfer Specification (STS), the meter case is IP54 enable it suitable for tropical using. Furthermore, the meter is wide current measurement designing, and the maximum current can be 100(A) when the basic current Ib is 5(A). The meter also has terminal cover opening anti-tamer function to ensure the security of the meter.


Item

Sub item

Parameter

Basic

Meter Type

Three Phase four Wires

Measurement Method

Three element

Active Accuracy

Class 1 (IEC 62053-21)

Rated voltage Un

3 x 220V/380V

Operating voltage range

0.8Un~1.2Un

Operating frequency

50Hz

Basic current Ib

10A

Maximum current Imax

100A

Starting current

0.004Ib

Pulse constant

3200 imp/kWh

Power consumption

Current circuit power consumption<=1.0VA
 Voltage circuit power consumption<=1.8W/10VA

Operating temperature range

--25℃ ~ +80℃

Storage temperature

-40℃ ~ +85℃

Communication

Communication interface

1 circuit optical interface;
1 circuit RS485 or PLC(Option);

Communication Protocol

Local: IEC62056-21
Remote: DLMS HDLC or IEC62056-21

Prepayment

Keypad

3X4 Membrane keypad

Prepayment Function

Compatible IEC62055-51, STS Standard

Remote Control

Relay

10(120)A:3 Phase Main contactor(120A);

Load Control

Overload disconnect contactor
(load limit value can be configured)

RTC

RTC (Option)

≤0.5s/day (in 23°C)

RTC support (Option)

10 years battery operation life operating for 
at least 2 years in case of any power failure.

LED&Display

LED

1 Active pulse output;
1 Credit status indicate(two colors)
1 Alarm indicate;

Backlight

Available

Energy

Active: 6+2 display

Structure

Terminal Box

BS Standard

Enclosure protection

IP54

Seal

1 Meter terminal cover seal;
2 Meter cover seal;

Meter Case

Polycarbonate

Dimensions(LxWxH)

285mmx170mmx78mm

Weight

Approx. 2.288kg



1. Measurement

Import/Export active energy 
Instantaneous value measurement
--(current/voltage/Active power/Power Factor of each phase)


2. Anti-tamper Function

Meter Cover open detection and record
Meter terminal open detection and record
Energy reverse detection


3. Event record

Anti-tamper detection event
Power outage
Remote connect/disconnect 
Recharge


4. Prepayment

local keypad credit charging, through 20-digit token. 
Support Friendly credit, can be setting through PC software
Protocol Compatible to IEC62055-51, STS Standard


5. AMI Function

Daily readout: Energy data(kWh)
Real readout: Energy data(kWh),Credit Value(kWh)

Real disconnect/reconnect relay;
Real read relay status;


6. Communication 

Optical interface/1 RS485 or PLC(Option);
Protocol compatible to (Local)IEC62056-21 and (Remote)DLMS HDLC or IEC62056-21;