Multifunctional network power instrument

Detailed Product Description

  This series meter has all the functions of SFDB series digital programmablemeters.It can measure almost more than 30 electrical parameters including of three-phase voltage,three-phase current,active power,reactive power,apparent power,frequency,power factor and 4-quadrant energy etc;It displays through 3-row 4-digit or 2-row 6-digit LED nixietubes or LCD screen.It is added with keyboard parameters such as alarm and transmitting output object,alarm delay time ,display object and cycle display time and 2-channel electric energy pulse outputs,4-channel switching value input and 4-quadrant energy measuring functions.The alarm(or switching value)output and transmitting output can enlarge to four channels.

Basic Parameters:

Input Parameters:

Rated voltage:AC 57.7V,100V,220V,380V   

Rated current:AC 1A,5AFrequency range:45~65HZ 

Input network:3-phase3-wire,3-phase4-wire

Accuracy of measurement:

voltage,current,active power.reactive power,apparent power:±0.5%

Frequency:±0.1Hz    Power factor:±0.01PF

active electric energy:±0.5%   reactive electric energy:±2.0%

Start:On the condition of rated voltage,reference frequency and COSΦ=1.0,

      when load operational current is 0.001In,it can start and measure

      the electrical quantity continuously.

Creep:When exerting 115%rated voltage and no current in the current

       circuitry, the instrument is with no electrical quantity accumulation

       and pulse output.

Output parameters:

Pulse output:open-collector optical coupling output,open-collector voltage

              VCC≤48V,current Lz≤500mA

Pulse constant:10000imp/kWh or 10000imp/kvarh.The meaning is:the

                pulse output 10000imp when the meter accumulate to

                1kWh,it stresses that,1kWh is quadratic electric quantity

                data of elecric quantity.Under the cndition of PT and CT,

                the N pulse data responding the primary electric

                energy=1kWh×PT ratio×CT ratio

Alarm(or switching value)output:4-channel relay normally open contact

output,30VDC/1A,240VAC/1A(resistive load)

Switching value input:4-channel dry contact(built-in+5V source)

Analog quantity transmitting output:can provide4-channel outputs at the same time

Output range:DC 0~20mA/4~20mA programmable 

Accuracy:±0.5%

Overload:120% actual output,Max current is 24mA  

Load:≤400Ω

Communication interface:RS485 serial

communication,applying MODBUS_RTU communication protocol