Specifications:
Type: DDSD285
Accuracy Class: Class 1, Class 2
Voltage: 220V, 230V
Current: 2.5(15) A 5 (30) A 10(60) A 20(100) A
Note: Customer specified requirement could be satisfied. Technical Data:
(1) Voltage range:
Specified operating range: 0.85Un~1.1Un
Limit range of operation: 0.75Un~1.15Un
(2) Rated frequency: 50Hz
(3) Starting current: 0.004Ib
(4) Power consumption in voltage circuit: <2W or 2.5VA
Power consumption in current circuit: <2.5VA
(5) Dimension (mm): 164.5x112x71 (LxWxH)
(6) Net Weight: 0.7kg
(7) Clock accuracy: Daily timing error less than 0.5s(reference
temperature)
(8) Battery capacity: >1000mAh
(9) Data preservation time: >10years
(10) Temperature range:
Specified operating range: -25C~+55C
Limit range of operation: -40C~+70C Main Functions
(1) Active energy measuring
It can measure total energy and energy of every tariff. The reverse
energy is measured and added to the corresponding forward energy.
The energy measuring range is from 0 to 99999.999 kWh. (2) RTC
An external real time clock realizes the timing and TOU, including
calendar programme and daylight saving time setting. (3) TOU control
It can offer 4 set schedules to realize multi-TOU control. The day
can be maximally divided into 10 periods with 4 tariffs for each
schedule. Work-off days can be also programmed in a week. (4) Energy Record
It can store energy in billing day of each month. The billing day
can be set within 1 to 28 of one month. It may store history energy
data for 12 months. All data may be accessed via personal computer
(PC) or handhold unit (HHU). (5) Display
It can display by LCD indicator during both power supply and power
failure. It supports automatically cyclic display mode and button
pushing display mode. User via PC or HHU can set display items. If
power failure lasts 7 days continuously, display will be turned off
and can be awaked by infrared controller or pushing button. (6) Event Log
It can record last five times of case opening during normal
operation and once of such event in case of power failure. The
other events will be recorded including power down, programme
setting and current reversing. The total happening times of each
event plus their respective latest five stating times and ending
times can all be accessed via PC or hand hold unit (HHU). (7) Communication
It can communicate via an infrared interface, which realizes the
meter reading and parameter setting. There is a separate battery
inside the meter for meter readings under power failure condition. | 
