Three-phase Programmable intelligent digital display meters are applied in electric power network and automatic control system, mainly measuring all the parameters in the power system, such as current, voltage, frequency, power factor, active power, reactive power and so on. In according to its additional functions, the meters can be divided into X, K, D, S four series.

X series of intelligent digital display meters, mainly measure and display the electrical parameters in the electric power network, such as current, voltage, power, frequency and power factor and so on, with the features of intuitive display, high precision, good reliability, anti-vibration, etc. AC True effective value measurement can be used to a serious wave distortion place.

On the basis of X series ,K series intelligent digital display meters have added with the functions of setting ratio keyboard and one channel RS485 communication interface output(supports Modbus RTU protocol) in order to facilitate digital display meters in the group networking.

D series digital display transmission meters on the basis of X Series meters have added with the functions of analog transmitting output(4-20m A and so on) and one channel RS485 communication interface which supports Modbus-RTU protocol, and can be directly three lines digital display or single-line digital switch.

S series Digital alarm monitoring control meters have increased the functions of relay output (to achieve “the excess limit alarm or telecontrol function”) on the basis of X series meters: RS485 digital interface which supports Modbus-RTU implement “remote” function, the variable ratio and communication parameters can be easily and momentarily set through meter panel buttons.

The Products meet the standard of GB/T22264.1-2008, GB/T 13978-2008.

2.     Typical Product Pictures

3.     Models and Meaning of Products

4.     Products Models

5.     Technical Specifications

6.     Outline Dimension

DC284U-2K4

DC284U-9K4

DC284U-AK4

7.     Typical Signal Input Wiring Diagram

Note: the above diagram is only for reference, the actual parameters in the factory shall prevail.

Wiring Instruction:

l   Input voltage cannot exceed rated input voltage (100V or 400V), otherwise should consider using PT, in order to make maintenance easily, advice to use connector bar.

l   Standard rated input current is 5A or 1A, if in the situation of more than 5A, should use exterior CT. If using CT with other meters, wiring method should be series connection, before removing the wire of input current, make sure that cut off CT one circuit or Short sub-secondary circuit in advance, in order to make maintenance easily, advice to use connector bar.

l   Make sure input voltage is correspond with input current, phase no. consistent, directions are consistent, otherwise the value and the symbol of power and electric energy will be wrong.

l   The meter can work in three-phase four-wire or three-phase three-wire mode, the users should select the appropriate wiring way based on the site situation. Usually under the situation without center line, use three-phase three-wire mode, while three-phase four-wire mode under the situation of center line. Please pay attention that onsite wiring mode must be consistent with the wiring default setting of the meter, otherwise the data of measured by meters will be incorrect.

8.     Ordering Example

When order please specify the required models, power supply, signal input, the transformation ratio, display requirements and relative content. Accuracy class, the default is Class 0.5. For example, if need Class 0.2, please specify when ordering.

l   Model: DC284U-AK4

l   Power supply: AC 220V

l   Signal Input: AC380V

l   Other: other factory pre-sets (if no indication when ordering, ex-factory products will be delivered in accordance with the default setting).