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Harmonic Measurement Meter

Harmonic Measurement Meter

PD7777-H series digital harmonic multi-functional meter Summary: PD7777-H series digital harmonic multi-functional meter is mainly applied into highly accurate real-time measurement and indication such as voltage, current, active power, reactive power, apparent power, frequency, power factor,...

Product Details

PD7777-H series digital harmonic multi-functional meter

Summary:

PD7777-H series digital harmonic multi-functional meter is mainly applied into highly accurate real-time measurement and indication such as voltage, current, active power, reactive power, apparent power, frequency, power factor, four-quadrant electric energy, voltage/current harmonic content (2nd ~31st), total harmonic content of voltage/current and degree of unbalancedness of voltage/current (including positive, negative, zero sequence) in the electrical circuit. The instrument supports switch quantity input, switch quantity output, analog quantity output, RS485 interface, USB interface and other functions.


1. Main functions and characteristics:

◆It adopts dot colorized LCD sketch display with intuitive and friendly interface.

◆It can measure the electrical parameters such as current, voltage, active/reactive power, apparent power, power factor, frequency, etc. in the electrical network.

◆Accurate measurement four-quadrant energy.

◆power quality monitoring:

Measure the 2nd~31st harmonic content of the voltage, current, total harmonic distortion, bar graph of the display harmonic in the electrical network.

Measure the power quality parameters such as positive sequence, negative sequence, zero sequence of voltage/current, degree of unbalancedness, etc.

Online real-time displayed voltage, current waveform, observing the real-time condition of power grid, which can realize the phase sequence regulation such as voltage and current and loss of phase detection, etc.

◆Input/output function of the modules:

Provide one-way active energy and one-way reactive power impulse output.

Provide multi-way relay switch output function, which can realize upper and lower limit alarm output.

Provide four-way switch input state indicating function, adopting passive stem node resistive signal input method.

◆With the standard RS-485 communication interface, adopting the standard ModBus-RTU communication protocol and the baud rate can be set.

◆Each switch quantity has 500 SOE event recording function.

◆It is characterized with 500 pieces of manual and automatic fault wave recording function, continuously saving loaded curve data records for one year.

◆Parameters such as the current/voltage ratio, indication mode for electrical quantity, the of the meter, electric quantity display mode, communication address of the meter, baud rate, transmitting output object, transmitting output range, alarming object, alarming upper/lower limit, etc. can be randomly programmed and set.

 

2. Model specification and selection description:

(unit: mm)

Model

Measurement display

Energy

Power pulse

RS485 communication

Analog quantity output

Switch quantity output

Switch quantity input

External
size

Display
mode

voltage

current

Active power

Reactive power

Power factor

Frequency

Active energy

Reactive energy

PD7777-3H


96×96

Color LCD graphic display

PD7777-8H

120×120


Note: 

●means the intrinsic functions of the instrument.

 

3. Main technical performance and parameters:

Technical parameters

index

Connection mode

Three phase three wire or three phase four wire optional

 

 

Input

 

Voltage

Rated value

AC100V, 220V, 380V

Overload

Continuous: 1.2 times, instant: 2 times/1s, adopt red    font identification when out of 1.2 times of the rated value

Consumption

<2VA(each phase)

Resistance

>500kΩ

 

Current

Rated value

AC1A, 5A

Overload

Continuous: 1.2 times, instant: 10 times/5s, adopt red    font identification when out of 1.2 times of the rated value

Consumption

<1VA(each phase)

Resistance

<20mΩ(each phase)

Measuring rang of the frequency

45Hz-65Hz

 

 

 

 

 

Output

 

 

Display mode Measuring accuracy

3.5 inch/4.3 inch lattice LCD

Voltage  Class 0.2 Resolution 0.1V
Current  Class 0.2 Resolution 0.001A
Active power  Class 0.2  Resolution 1W
Reactive power  Class 0.5 Resolution 1var
Power factor  Class 0.5 Resolution 0.001

Frequency Class 0.2 Resolution 0.01Hz
Active energy  Class 0.2  Resolution 0.01kWh
Reactive energy  Class 2.0 Resolution 0.01kvarh
The unit can switch automatically, the decimals shift automatically

 

Electric energy

Energy measurement

Support positive/negative measurement active(reactive) energy

Pulse constant

Active power: 10000imp/kWh, Reactive power:    10000imp/kvarh

Pulse signal output

Provide 2 sets(active/reactive energy) of optical signal and optocoupler isolated open collector electrical signal pulse output

 

Communication

Mode

RS-485

Protocol

MODBUS-RTU

Baud rate

1200bps, 2400bps, 4800bps, 9600bps, 19200bps, assumed  to be 9600bps

Switch quantity input

4-way passive dry node input mode

Switch quantity output

Support 4-way relay-state output, relay contact

capacity:AC250V/2A, DC30V/2A(-3H only has 2-way)

Analog quantity output

Current output: DC0mA~10mA, DC0mA~20mA, DC4mA~20mA,

Class 0.5(-3H without this function)

Switch quantity input

4-way passive dry node input mode

Harmonic

2nd ~31st harmonic of voltage/current

Calendar clock

Clock error: 0.5s/d (reference temperature: 23℃)

USB interface

Host mode(-3H without this function)

Working power supply

Range

AC/DC85V~264V

Consumption

≤15VA


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