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Keypad Prepayment Energy Meters comply with STS standard, and use 20 digits
encrypted token as data exchange media.
STS is now used over 84 countries.
STS Supply Group Code (SGC

Advantages of STS Keypad Prepayment Energy Meter

Compatibility - STS ensures inter-operability between system components from different
manufacturers of prepayment systems.

International Standard - Comply with IEC62055 the only international series of specifications of prepayment meter.

Security - As safe as bank account. Security is approved by National Institute of Standards and Technology (NIST) and Federal Information Processing Standards (FIPS).

Virtual Media - Virtual media data exchange mode supports multiple vending methods such as
SMS, Scratch card, POS or E-vend etc.

Easy Maintenance - Compared with IC card meter, keypad meter has no require of store and
manage thousands of cards.

Active power measurement - Reverse current can be cumulated as forward one or measured

Parameter monitor - Power consumption, balance power, voltage, current, power load, consumption
history, max demand etc.

Power load control - If over load lasts for 45 seconds, meter will trip off
power and reinstall in 150 seconds. If meter trips 5 times in 30 minutes, it will suspend power for 45
minutes before reinstall. Reinstall can be done manually or automatically.

Life-line power load function applicable - When applied, customer can still use power under life-line
power load even there is no credit in the meter.

Night time& holiday assured function - Meter can be configured that it will not cut off power during
night or holidays.

Harmful appliance recognition - Meter can recognize harmful appliance (such as hot pot or heater in
dormitory) and cut off power to protect system.

Over-draft function - When applied, customer can over-draft and use power after meter runs out of
credit. Over-draft amount can be configured.

Pre-warning and Warning function - Meter will give sound and visible alarm when balance power is
less than pre-warning and warning threshold. Meter also give warning for over load, temper, wire false
or other abnormal situation.

Anti-tamper function
- Meter can record up to 50 events with time and type, such as terminal cover open,
Event recordreverse current, bypass, recharge, key change, over load or battery low etc.


Single Phase Keypad Energy Meter

Single phase Keypad Energy Meter is developed with advanced measuring, controlling and
communicating technologies. Meter is equipped with high accuracy measuring function as
well as power control function.
STS approval No. STS-154




SANS 1524-1
BS 5685

Model No. DDZ1513
Accuracy Class1.0
Rated Voltage 220/230/240V AC
Rated Current 5(30)A; 5(60)A; 5(80)A; 10(80)A; 10(100)A
Rated Frequency 50Hz/60Hz
Meter Constant 1000imp/kWh
Start Current ≤20mA
IP Class IP 54
Protocol IEC62056-21 Baud rate 2400bps
Communication O p t i c a l , R S 4 8 5 / 2 3 2 , E S K O M p o r t S C S S C A A A 9
PLC, Pair Cable, RF (items marked with are applicable)


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