ABB SPAC 315 C User Manual And Technical Description page 50

Energy measurement
by integration
24
Example 14
Reactive power is to be measured in the range
0...2.2 Mvar and the corresponding mA signal
range is 4...20 mA.
>99WS91:1:XX
; Enable power measurement
>99WS14:+4:XX
; Set low limit of mA signal
>99WS15:+20:XX
; Set high limit of mA signal
>99WS18:+0.00:XX
; Set value of power corresponding to low
mA signal limit
>99WS19:+2.20:XX
; Set value of power corresponding to high
mA signal limit
>99WV151:1:XX
; Store set parameters
The scaled active and reactive power values can
be transmitted to remote control systems over
the SPA bus by using variable V3 for active
power and variable V4 for reactive power.
Energy
Input channel 7 can be used as an energy pulse
counter. The measured energy is displayed lo-
cally by three digits in three parts; in kilowatt-
hours, in megawatthours and in gigawatthours.
Correspondingly, the energy value can be read
via the serial bus in three parts with maximum
three digits (parameters V8...V10) but also as
one part in kilowatthours with maximum nine
digits (parameter V5). Before the energy pulse
counter can be used the energy measurement
must be enabled by variable S92. The default
setting of variable S92 is 0, which means that
energy measurement is disabled.
Energy can also be measured by integrating the
measured active and reactive power over time.
In this case the measured active energy in one
direction is displayed locally, whereas both posi-
tive and negative active and reactive energy val-
ues can be read over the SPA bus.
The integration is used automatically if energy
measurement is enabled by parameter S92 and
input channel 7 has not been defined as a pulse
counter input.
The following parameters must be defined for
input channel 7:
S1 = definition of input channel 7
0 = general binary input (default)
1 = pulse counter input without local
LED indication on front panel
2 = pulse counter input with local LED
indication on front panel
S2 = pulse direction
0 = negative pulse
1 = positive pulse (default)
The following parameters must be defined for
channel 0:
S3 = definition of kWh value per pulse, setting
range 0.00...1000 kWh per pulse. Default
setting is 1.
Example 15
Energy measurement via input channel 7 de-
fined as pulse counter input.
>99WS92:1:XX
; Enable energy measurement
>99WS3:5:XX
; Set energy value 5 kWh per pulse
>99W7S1:1:XX
; Set input 7 as a pulse counter without
local indication
>99W7S2:1:XX
; Set a positive polarity of pulses
>99WV151:1:XX
; Store the programmed parameters
Example 16
Energy measurement by integrating the meas-
ured power value over time. Initially the power
measurement must be enabled and the power
values scaled, see examples 13 and 14.
>99WS92:1:XX
; Enable energy measurement
>99WV151:1:XX
; Store the set parameters