DTAD666 three-phase digital multifunctional electric energy meter

RS485 communication; Infrared communication; Fiber optic interface (ST, RJ45); Communication protocols: IEC61850-9-2, IEC61850-8-1, DL/T 645-2007

Voltage and current sampling are completed outside the meter and converted into digital signals. The sampled signals are transmitted to the energy meter through optical fibers, and the measurement algorithm is implemented by a high-speed DSP

● It has forward active power, reverse active power, reactive power measurement in 4 quadrants, instantaneous quantity calculation, and demand measurement

Can measure current, voltage, active power, reactive power, power factor, phase angle, grid frequency, battery voltage, etc

● It has two sets of programmable time zone tables, two sets of time period tables, and 254 public holidays: each set of time zone tables has 14 annual time zones; Each time slot table has 8 daily time slots, 14 time slots, and 4 rates

● Support at least 12 months of monthly settlement

● Support automatic wheel display, key display, and power failure display

● Record meter voltage loss, undervoltage, overvoltage, phase failure, total voltage loss, voltage reverse phase sequence, current reverse phase sequence, voltage imbalance, current imbalance, loss of current, overcurrent, interruption, reverse current flow, overload, power outage, demand exceeding limit, total power factor exceeding limit, etc

The load record content can be selected from any combination of six data items: "voltage, current, frequency", "active and reactive power", "power factor", "total active and reactive energy", "total reactive energy in four quadrants", and "current demand". The load curve function can also be customized according to customer requirements

● It can be frozen regularly, instantly, daily, agreed upon, hourly, etc

● Active reporting of battery level and events can be done through MMS interface

After a power outage, the energy meter can be awakened by pressing a button for meter reading, or by using an infrared communication port for meter reading. If there is no button operation after the electric energy meter is awakened, it will automatically cycle through the display and then turn off the LCD display. If there is a button operation, the LCD display will be turned off after 30 seconds of button operation

When both external power sources are cut off, the energy meter is powered by the internal battery to maintain uninterrupted operation. At the same time, the energy meter automatically enters a sleep state to reduce battery power consumption. When the external power source resumes power supply, the energy meter exits the sleep state. In sleep mode, it can be awakened through infrared or button pressing