hager h3+ - Power Measurements

476LE005550A
Function of the Energy trip unit
3.3 Measurement function
List of unbalance values:
Electrical variable Symbol used
Version
3 P
Version
4 P
Phase current unbalance I1 Unb, I2 Unb, I3 Unb
X X
Neutral current unbalance IN Unb
– X
Instantaneous maximum phase current
unbalance without neutral
Max Unb I
X –
Instantaneous maximum phase current
unbalance with neutral
Max Unb I
– X
Ph-Ph voltage unbalance U12 Unb, U23 Unb, U31 Unb
X X
Ph-Ph maximum instantaneous voltage
unbalance
Max Unb U
X X
Ph-N voltage unbalance V1N Unb, V2N Unb, V3 Unb
– X
Ph-N maximum instantaneous voltage
unbalance
Max Unb V
– X
Note
Unbalance values are indicated in the form of relative values as a %.
Maximum unbalance values are expressed in the form of absolute values as a %.
3.3.5
Measuring power
The Energy trip unit calculates the following electrical power in real-time
(every second):
- Active power per phase
- Reactive power per phase
- Apparent power per phase
- Total active power
- Total reactive power
- Total apparent power
The exhaustive list of variables calculated, associated with their mathematical
definition and their availability according to version 3P or 4P, is given in the following
table:
Electrical parameter Symbol Definition
Version
3 P
Version
4 P
Active power per phase P1, P2, P3
– X
Apparent power
per phase
S1, S2, S3
A
– X
Reactive power
per phase
Q1, Q2, Q3
– X
Total active power Ptot
X X
Total reactive power Qtot
Vector or arithmetic addition depend-
ing on configuration, see § 3.3.10
X X
Total apparent power Stot
Vector or arithmetic addition depend-
ing on configuration, see § 3.3.10
X X