CHINT DTSU666 Series User Manual

DTSU666 series and DSSU666 series
three phase electronic energy meter
ZTY0.464.1448
User manual
Page 4, Total 21
Figure 2 Working principle block diagram
2.1.Principle for the main function module
2.1.1.Metering part
The special metering integrated circuit (ASIC) integrated six load two order ∑-△ type of A/D
conversion, please take the digital signal processing measured by the voltage circuit as well as all the
power, energy, effective values, power factor and frequency. This metering chip can measure the active
power, reactive power, apparent power, active energy, reactive power, apparent energy of each phase
and combined phase, and at the same time measuring current, voltage effective values, power factor,
phase angle, frequency and other parameters, entirely satisfying the needs of power meter. The chip
provides an SPI interface, convenient for metering parameters as well as parameter calibration
between the management MCU.
2.1.2.Data processing part
Management MCU will timely read the electrical parameters such as current, voltage, power, etc.
in the metering chips, judging the current quadrant based on the read data, and judging the current

CHINT DTSU666 Series Specifications

General

Type	Three-phase electronic energy meter
Rated Current	5A
Starting Current	0.004Ib
Frequency	50/60Hz
Display	LCD
Mounting	DIN rail
Operating Temperature	-25°C to +55°C
Storage Temperature	-40°C to +70°C
Protection Level	IP51
Rated Voltage	3x230/400V
Communication	RS485
Weight	0.5 kg
Standards	IEC 62052-11
Accuracy Class	0.5S
Humidity	<95% non-condensing