AEMC instruments 2136.35, Руководство пользователя

Страница: 139 / 144

Power Quality Analyzer PowerPad
®
IV Model 8345 131
k Kilo (10
3
)
KF
K factor calculated per IEEE C57.110. A transformer’s ability to be
used with loads that consume non-sinusoidal currents
L Line (channel)
m Milli (10
-3
)
M
Mega (10
6
)
MAX
Maximum value calculated over either 10 cycles or 12 cycles
depending on whether the frequency is 50 Hz or 60 Hz
MIN
Minimum value calculated over either 10 cycles or 12 cycles
depending on whether the frequency is 50 Hz or 60 Hz
ms Millisecond
MSV Mains signaling voltage
N Non-active power
Nominal voltage Voltage that a network is designated or identified by
NTP Network Time Protocol, enables time synchronization via a time server
P Active power
P Peta (10
15
)
P
DC
DC power
PF Power factor: the ratio of active power to apparent power
PF1 Fundamental power factor
Phase Time relation between current and voltage in AC circuits concernin
PK
The signal’s maximum (+) or minimum (-) peak value over
10/12 cycles
P
lt
Severity of long-term flicker (long-term severity) calculated over 2 h
P
st
Severity of short-term flicker (short-term severity) calculated over
10 min
Q
f
Reactive power
Order of a
harmonic
Integer equal to the ratio of the harmonic frequency to the
fundamental frequency
RMS
The root mean square (RMS) of current or voltage. Square root of
the arithmetic mean of the square of the instantaneous values of a
quantity during a specified interval of time (200 ms, 1 s, or 3 s)
RVC Rapid voltage changes
S Apparent power
S-h Harmonics in power
T Relative date of the time cursor
T
Tera (10
12
)
tan φ Tangent of the voltage phase difference with respect to the current
Toe Ton of oil equivalent (nuclear or non-nuclear)