VAMP 260
Power monitoring unit
Technical description
VAMP Ltd
6
Vamp 24h support phone : +358 (0)20 753 3264
VM260.EN004
Line voltages and phase voltages
PMU measures the voltage applied to the voltage measuring
inputs. Both the line voltages and the phase voltages can be
measured depending on the connections of the measuring
circuits. The used voltage type is set when configuring. The
minimum and maximum values of voltages are monitored and
stored (see chapter 2.2.12).
Selectable voltages U
a
, U
b
, U
c
Measuring range 0 – 265 Vac
Phase currents
PMU measures the phase currents applied to the current
measuring inputs. Standard measuring currents 1 A or 5 A can
be used. The used current level is defined when ordering. The
minimum and maximum values of currents are monitored and
stored (see chapter 2.2.12).
Phase currents I
L1
, I
L2,
I
L3
Measuring range 0 – 5 x In
In = 1 A or 5 A
Frequency
The frequency is measured from the voltage input. The
minimum and maximum value of the frequency is monitored
and stored (see chapter 2.2.12).
Frequency f
Measuring range 16 - 75 Hz
2.2.2.
Power calculations
Active, reactive and apparent power
All calculated power values (P, Q, and S) are based on voltage
and current measurements. The values are displayed as
primary values. The minimum and maximum of power values
are monitored and stored (see chapter 2.2.12).
Active power P, Reactive power Q, Apparent power S
Measuring range 0 -
±
3 x In x Un
Power factor
The calculation of the power factor P.F. is based on the
measured three-phase voltages and currents. In the addition
cos
ϕ
and tan
ϕ
values are calculated, too. The minimum and
maximum values of power factor, cos
ϕ
and tan
ϕ
are monitored
and stored (see chapter 2.2.12).
Power factor P.F
Measuring range 0 -
1
-1 - 0
