METREL MI 2893 User Manual

MI 2893 / MI 2892 / MI 2885 Measurement methods
203
Figure 165: Avg vs. Avgon, switching load current
After 10 minutes values will be:
Irms (rms average) = 50A
Irms (rms AvgOn) = 100A
AvgOn considers only those measurements where current is greater than zero.
Power and energy recording
Active power is aggregated into two different quantities: import (positive-consumed P+) and export
(negative-generated P-). Nonactive power and power factor are aggregated into four parts: positive
inductive (i+), positive capacitive (c+), negative inductive (i+) and negative capacitive (c-).
Consumed/generated and inductive/capacitive phase/polarity diagram is shown on figure below:
GENERATED ACTIVE POWER
CONSUMED REACTIVE POWER
TYPE
Capacitive
CONSUMED ACTIVE POWER
CONSUMED REACTIVE POWER
TYPE
Inductive
GENERATED ACTIVE POWER
GENERATED REACTIVE POWER
TYPE
Inductive
CONSUMED ACTIVE POWER
GENERATED REACTIVE POWER
TYPE
Capacitive
90'
270'
0'
180'
P
Q
N
PF
DPF
P ·t
Q ·t
P+
Qi+
Ni+
PFi+
DPFi+
Ep+
Eq+
Instantaneous
values
Recorded
Values
→
→
→
→
→
→
→
P
-Q
-N
PF
DPF
P ·t
-Q ·t
P+
Qc-
Nc-
PFc+
DPFc+
Ep+
Eq-
Instantaneous
values
Recorded
Values
→
→
→
→
→
→
→
-P
Q
N
-PF
-DPF
-P ·t
Q ·t
P-
Qc+
Nc+
PFc-
DPFc-
Ep-
Eq+
Instantaneous
values
Recorded
Values
→
→
→
→
→
→
→
-P
-Q
-N
-PF
-DPF
-P ·t
-Q ·t
P-
Qi-
Ni-
PFi-
DPFi-
Ep-
Eq-
Instantaneous
values
Recorded
Values
→
→
→
→
→
→
→
CONSUMED ACTIVE
POWER
GENERATED ACTIVE
POWER
GENERATED REACTIVE
POWER
CONSUMED REACTIVE
POWER
Figure 166: Consumed/generated and inductive/capacitive phase/polarity diagram

METREL MI 2893 Specifications

General

Brand	METREL
Model	MI 2893
Category	Measuring Instruments
Language	English