Description

3-PHASE TRANSDUCER OF POWER NETWORK PARAMETERS

The P43 transducer is a programmable digital instrument destined for the measurement and parameter conversion of 3 or 4-wire three-phase power networks, in balanced and unbalanced systems.

It ensures the measurement and conversion of measured values into standard analog current signals. Relay outputs signal the overflow of selected quantities, and the pulse output can be used for the consumption monitoring of the 3-phase active energy.

Quantities measured and calculated by the transducer:

l phase voltages………………………………………………. U1, U2, U3

l phase–to-phase voltages ……………………………….. U12, U23, U31

l 3-phase mean voltage ……………………………………. U

l phase-to-phase mean voltage ………………………… UPP

l three-phase mean current……………………………….. I

l phase currents ……………………………………………… I1, I2, I3

l phase active powers………………………………………. P1, P2, P3

l phase reactive powers……………………………………. Q1, Q2, Q3

l phase apparent powers………………………………….. S1, S2, S3

l phase active power factors……………………………… Pf1, Pf2, Pf3

l reactive/active ratio of power factors………………… tgj1, tgj2,tgj 3

l three-phase mean power factors……………………… Pf, tgj

l three-phase active, reactive and apparent powers…. P, Q, S

l active mean power (e.g.15 min.)………………………. Pav

l voltage values THD………………………………………… U1, U2, U3

l current values THD ………………………………………… I1, I2, I3

l phase values cosj………………………………………….cosj1,cosj2, cosj3

l three-phase values cosj…………………………………. cosj

l phase values j………………………………………………. j1, j3, j3

l calculated current in the neutral cunductor wire… In

l three-phase active and reactive energy……………. Ept, Eqt,

l frequency …………………………………………………….. f

l energy consumption – power guard………………….. Pord

 

The transducer possesses an archive, in which 9000 last mean power values, with time marker, suitably synchronized with the clock (15, 30 or 60 minutes) are stored.

Maximal and minimal values are measured for all quantities. Additionally, there is the possibility to accommodate the transducer to external measuring transducers. The transducer has a detection and signaling of incorrect phase sequence. The actualization time of all accessible quantities does not exceed 1 second. All quantities and configuration parameters are accessible through the RS-485 interface and the USB interface.

Transducer output signals are galvanically isolated from the input signals and the supply. Outside the transducer, there are socket-plug screw terminal strips, to which a conductor with maximal diameter 2,5mm2 can be connected