WEG PFW03-M8 Configuration Manual

PFW03-M8

Automatic Power Factor Controller

PFW03-M8

• It measures active (P) and reactive (Q) power
of the system to which it is connected;

• With the result of such measurement, it
activates capacitors in case it is necessary to
compensate reactive inductive loads;

• Through the front panel, you can easily access
all settings and readings of electrical quantities;

• One isolated RS485 port;

• Two output alarm relays;

PFW03-M8

Main differences between the M8 model and the other PFWs

PFW03-M12/M24/T12/T24 PFW03-M8

Graphic LCD display Standard LCD Display

Dynamic monitoring of the capacitors --------

Several stage control modes Smart mode only

Automatic reading of the stages Manual selection of the stages

Stages with reactors/inductors Stages with capacitors only

Real time clock --------

Hourly, daily and monthly records No records

Fixed stages can be set No fixed stages

Demand measurement --------

Individual and total harmonic measurements

up to 51st order

Energy measurements --------

No setting of critical alarms Setting of critical alarms

Only total harmonic distortion

measurement up to 31st order

PFW03-M8

Description of the display functions

1) Stages;

2) Units and indicators;

3) Menu bar;

4) Quadrant indicator

5) Target cosφ;

6) Automatic mode;

7) Manual mode;

8) Alarm indicator;

9) Communication indicator;

10)Alarm relay indicator;

11)Indication bar of the stages

in operation in relation to

the total stages

PFW03-M8

Description of the display functions

The direction of the energy flow is obtained by the
angular phase shift φ between voltage and current.
A positive value of the active/reactive power
indicates energy being consumed.
A negative value indicates energy being generated.
E.g.:
P= +10kWh, Q= +5kVAr => Quadrant-1
P= -10kWh, Q= +5kVAr => Quadrant-2
P= -10kWh, Q= -5kVAr => Quadrant-3

P= +10kWh, Q= -5kVAr => Quadrant-4

PFW03-M8

Connections

Current

measurement

input

RS485

terminals

GEN input

Power supply and
voltage
measurement

Terminals of the
alarm relays

Connection of
the stages