Application

DDSY881 electronic single-phase prepaid energy meter is used to
measure single-phase energy with 50/60Hz rated frequency, it realizes
the functions of prepayment management and load control.

Function and features:
1) Full electronic single-phase active energy measurement
2) Protecting against tamper and fraud
3) Prepayment management system by use of IC card to
commercialize energy so as to pay for it first and use it afterwards
4) Scrolling display energy consuming information which is convenient
for user
5) Warning when residual energy is deficient to remind users of
purchasing energy in time
6) Delay trip at overload automatically
7) IC card adopting ISO standard IC card
8) Adopting large-scale special IC with industrial class design
and high accuracy
9) Special large capacity meter reading card with high accuracy
10) One meter with one IC card which adopts special security
measures to ensure the security and reliability of data
11) Special Setting Card and Meter-replacing Card are
convenient for registration and maintenance of management
department
12) Adopting check and error correction measures in the software
to ensure the data's validity and reliability
13) Reading back energy consuming data automatically through IC
card, convenient for management
14) Adopting power failure treatment technique to ensure the data
being kept for 10 years