DTSIYF/DSSIYF79 Carrier Three Phase Four Wire Electronic Prepaid Time of Use Energy MeterDetailed product description：

1、 Product Overview
The DTSIYF79 carrier three-phase four wire electronic prepaid time-sharing energy meter is a new generation intelligent energy meter that uses high-performance single-chip microprocessors and specialized integrated circuits for energy measurement, and adopts advanced SMT technology. It has been carefully optimized, designed, and manufactured. This meter adopts CPU card technology and has functions such as prepaid, self check, pre alarm, online and offline query, and card replacement. At the same time, it can also achieve time-sharing energy metering. This series of meters has the advantages of high accuracy, strong overload capacity, low power consumption, high reliability, good confidentiality, and stable performance. Its main technical indicators are superior to the GB/T18460.3-2001 and GB/T15284-2002 standards, as well as the DL/T698-1999 technical specification standards for low-voltage power user centralized meter reading systems.

2、 Main functions of DTSIYF/DSSIYF79 carrier three-phase four wire electronic prepaid time-sharing energy meter
1) Intelligent control function
The meter has functions such as prepayment, pre alarm, and load control.
2) Time sharing metering function
It can be divided into four rates, calculated based on peak, off peak, off peak, and off peak hours.
3) Remaining battery calculation function
Calculate the remaining power in the energy meter.
4) Time period setting function
The time period (peak, off peak, flat, valley) parameters in the system can be set according to actual needs.
5) Card replacement function
If the purchased power card is lost or damaged, it can be replaced. If the purchased power card has already been plugged into the energy meter, then the purchase in the replacement card
Invalid battery level; If not plugged in, you can input the purchased power. Afterwards, the functions of card replacement and power card purchase are completely the same.
6) Monitoring function
Automatically detect external components, display "E - Error Number", and write fault information back on the user's power purchase card. When an illegal card is inserted, record the number of illegal card insertions.
7) Carrier communication function
The electricity meter has a standard carrier communication interface and can communicate with external devices. The carrier communication protocol complies with the power industry standard DL/T645-1997 Electricity Meter Communication Protocol, and there are also some custom protocols.
8) Infrared communication function
The electricity meter can communicate with the infrared interface of the handheld device through an infrared interface. The protocol it complies with is the same as the RS485 protocol. The communication baud rate is 1200.
9) Carrier communication function
The electric energy meter has a power line carrier (PLC) communication interface, and its communication protocol meets the "Design Specification for Multi functional Electric Card Meters in Hebei Province".

3、 Specifications and technical parameters
1) Electrical parameters
Accuracy level: 1.0
Rated frequency: 50Hz ± 5%
Reference voltage: AC3X220/380V
Extreme working voltage: 70% Un~120% Un
Reference current: 3X1.5 (6) A, 3X5 (20) A, 3X10 (40) A, 3X20 (80) A
Pulse constants: 3200 imp/kWh, 1600 imp/kWh, 800 imp/kWh, 200 imp/kWh
Maximum current: 4 times or more the basic current Ib, and the energy meter will not be damaged when operating at 1.2Imax.
Voltage circuit power consumption:<1.5W, 5VA (per phase)
Current circuit power consumption:<1.0VA (per phase)
2) Environmental conditions
Extreme working temperature: -40 ℃~70 ℃
Storage and transportation temperature: -30 ℃~70 ℃
Annual average humidity: ≤ 85%
3) Rate and time period working parameters:
Clock accuracy: 0.5S/d (23 ℃). When the battery provides clock power, the timing accuracy after 12 hours is better than 1s/d; The allowable change in temperature is 0.1s/(d ·℃).
Battery capacity: 1200mAh (green and environmentally friendly column lithium battery, CR 1/2 AA type)
Data retention time after power outage: ≥ 10 years
Battery power consumption after power outage: ≤ 10 μ A.