YOKOGAWA WT500 User Manual

14-4
IM 760201-01E
Measurement Functions Determined for Each Wiring Unit (
Σ
Functions)
For details about how
Σ
function values are computed and determined, see appendix 1.
Item Symbols and Meanings
Voltage (V)
Urms
Σ
: true rms value, Umn
Σ
: rectified mean value calibrated to the rms value, Udc
Σ
: simple
average, Urmn
Σ
: rectified mean value, Uac
Σ
: AC component
Current (A)
Irms
Σ
: true rms value, Imn
Σ
: rectified mean value calibrated to the rms value, Idc
Σ
: simple average,
Irmn
Σ
: rectified mean value, Iac
Σ
: AC component
Active power (W)
P
Σ
Apparent power (VA)
S
Σ
Reactive power (var)
Q
Σ
Power factor
λΣ
Phase difference (°)
fΣ
Integration Time: Integration time
WP
Σ
: Sum of positive and negative watt hours
WP+
Σ
: Sum of positive P (consumed watt hours)
WP–
Σ
: Sum of negative P (watt hours returned to the power supply)
q
Σ
: Sum of positive and negative ampere hours
q+
Σ
: Sum of positive I (ampere hours)
q–
Σ
: Sum of negative I (ampere hours)
WS
Σ
: Integrated value of S
Σ
WQ
Σ
: Integrated value of Q
Σ
You can select to integrate the ampere hours using Irms, Imn, Idc, Irmn, or Iac.
14.3 Normal Measurement Functions (Measured Items)

YOKOGAWA WT500 Specifications

General

Brand	YOKOGAWA
Model	WT500
Category	Measuring Instruments
Language	English