Hioki PW8001-01 User Manual

76
Measuring E󰀩ciency and Loss
3.5 Measuring E󰀩ciency and Loss
The instrument can calculate the e󰀩ciency η (%) and loss (W) using the active power values and
motor power values, and display them. For example, the instrument can calculate e󰀩ciency and
loss between input and output of various power converters (e.g., inverters, power conditioners) as
well as motors, and simultaneously calculate the overall e󰀩ciency.
E󰀩ciency and loss equations
You can set four or fewer equations (
η
1 to
η
4 and Loss1 to Loss4) for each of e󰀩ciency (η) and
loss (Loss).
Display screen [INPUT] > [EFFICIENCY]
1
Select the parameters of the input side
of the equation.
2
Select the parameters of the output
side of the equation.
Select the input-side measured power value
on the left and the output-side measured
power value on the right for each gure on
the screen. Up to six inputs and outputs can
be selected for each e󰀩ciency calculation
equation. E󰀩ciency is calculated using the
sum of the six.
Pout1
Pout2
Pout3
Pout4
Most recently calculated
e󰀩ciency value
Most recently calculated
e󰀩ciency value
Output parameters
Input parameters
Pout5
Pout6
Pin1
Pin2
Pin3
Pin4
Pin5
Pin6
Input side Pin = Pin1 + Pin2 + Pin3 + Pin4
+ Pin5 + Pin6
Output side Pout = Pout1 + Pout2 + Pout3
+ Pout 4 + Pout5 + Pout6
η 100
×
|Pout| / |Pin|
Loss |Pin| − |Pout|
• Motor power (Pm) measurement is selectable only for the motor analysis-equipped model. Congure
settings using the motor input settings screen to measure the motor power (Pm).
• See “Conguring the motor input settings” (p. 84).
• Calculations across wiring congurations with di󰀨erent power ranges are performed using data for the larger
of the two power ranges.
• Calculations across wiring congurations with di󰀨erent synchronization sources are performed using the
most recent data at the time of calculation.
To moderate measured value uctuation
• Measured values may exhibit variations when loads uctuates severely or transiently. In this
case, reduce the data refresh interval (to 200 ms) and also use the average function’s moving
average mode.
• When either the input or output is DC, variation in measured e󰀩ciency values can be limited by
using the same synchronization source setting for the channel used for DC measurement as for
the AC side.
HIOKI PW8001A961-00

Hioki PW8001-01 Specifications

General

Brand	Hioki
Model	PW8001-01
Category	Measuring Instruments
Language	English