Carlo Gavazzi WM5-96 - Manual (Page 32)

30
WM5-96 Instruction Manual
Programming WM5 96
Power retransmission by means of a 0-20mA analog output.
It’s necessary to measure a consumed power up to 100kW and
retransmit this value by means of a signal from 4 to 20 mA: the mod-
ule to be used is AO2050 (2x from 0 to 20mA), the instrument is to be
programmed as follows:
VARIABLE: W
∑ (system active power).
MIN OUT: 20.0% means 4 mA the calculation to be carried out is the fol-
lowing: (100*minimum output) / fullscale output =100*4mA/ 20mA=20%.
MAX OUT: 100.0% means 20mA, the calculation to be carried out is:
(100*maximum output) / fullscale output = 100*20mA/20mA= 100.
MIN IN: 0,0k; the multiple k,M,G can be selected on the instrument
according to the chosen VT and CT values.
MAX IN: 100.0k; the k, M, G multiples can be selected on the instru-
ment according to the selected VT and CT values.
Transmission of active consumed and generated power by means
of -5/+5mA analog output.
It’s necessary to measure both the consumed active power up to
100kW and the generated active power up to -100kW and retransmit
this value by means of a signal from -5 to +5mA: the module to be
used is AO2052 (2x from -5/+5mA), the instrument is to be pro-
grammed as follows:
VARIABLE: W
∑ (system active power).
MIN OUT: -100% means -5mA, the calculation to be carried out is:
(100*minimum output)/ fullscale output= 100*5mA/-5mA=-100%.
MAX OUT: 100,0% means 20mA, the calculation to be carried out is:
(100*max output)/ fullscale output= 100*5mA/5mA= +100%.
MIN IN: -100,0k; the multiples k,M and G can be selected on the
instrument on the basis of the VT and CT values.
MAX IN: 100,0k; the multiples K, M and G can be selected on the
instrument depending on the VT and CT values being selected.
Retransmission of the POWER FACTOR (PF) by means of the
0-20mA analog output.
It’s necessary to retransmit the whole range of the admitted values for
the PF with a signal from 0 to 20mA. Particular attention must be paid
to the value of the PF variable which may vary from C0,001 and L0,000
(for each phase): these values will be retransmitted and will then cor-
respond to 0 and 20 mA. When the PF will have a value equal to 1,
being in the middle between C0,001 and L0,000, the value of the out-
put will correspond to the middle of the scale, that is 10mA. As a con-
sequence, the instrument will have to be programmed as follows:
VARIABLE: PF L1 (or L2 or L3 or PF ∑).
MIN OUT: 0,0%.
MAX OUT: 100,0%.
MIN IN: C0,001 (the C symbol shows a CAPACITIVE value).
MAX IN: L0,001 (the L symbol shows an INDUCTIVE value). L0,001
has been chosen as minimum value to be set in order to avoid any
undesirable swifting of the repeated outputs.
Programming examples of the analog
outputs