Chauvin Arnoux pel 102, Руководство пользователя

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9. APPENDIX
9.1. MEASUREMENTS
9.1.1. DEFINITION
Calculations are done according to IEC 61557-12 and IEC 61000-4-30.
Geometric representation of active and reactive power:
Figure 39
Diagram in accordance with clauses 12 and 14 of IEC 60375.
The reference of this diagram is the current vector (fixed on the right-hand part of the axis).
The voltage vector V changes its direction according to phase angle
ϕ
.
The phase angle ϕ between voltage V and current I is taken to be positive in the the counterclockwise sense.
9.1.2. SAMPLING
9.1.2.1.
Sampling Period
Depends on mains frequency: 50 Hz, 60 Hz or 400 Hz.
The sampling period is calculated every second.
„
Mains frequency f = 50 Hz
„
From 42.5 to 57.5 Hz (50 Hz ±15%), the sampling period is locked to the mains frequency. 128 samples are available for
each mains cycle.
„
Outside the range 42.5 to 57.5 Hz, the sampling period is 128*50 Hz.
„
Mains frequency f = 60 Hz
„
From 51 to 69 Hz (60 Hz ±15%), the sampling period is locked to the mains frequency. 128 samples are available for
each mains cycle.
„
Outside the range 51 to 69 Hz, the sampling period is 128*60 Hz.
„
Mains frequency f = 400 Hz
„
From 340 to 460 Hz (400 Hz ±15%), the sampling period is locked to the mains frequency. 16 samples are available for
each mains cycle.
„
Outside the range 340 to 460 Hz, the sampling period is 16*400 Hz.
A pure DC measured signal is considered to be outside the frequency ranges. The sampling frequency is then, according to the
preselected mains frequency, 6.4 kHz (50/400 Hz) or 7.68 kHz (60 Hz).
9.1.2.2. Locking of Sampling Frequency
„
By default, the sampling frequency is locked to V1
„
If V1 is missing, the sampling frequency attempts to lock to V2, then V3, I1, I2 and I3
V
P
φ
S
Q
Export active power Import active power
Import reactive
power
Export reactive
power