Multifunctional network power instrument

SFDBE Series Multifunctional Network Power Instrument

  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

Multifunctional network power instrument