Hioki PW3198 Manual

8
Power Quality Survey Applications
The power supply of the ofce equipment sometimes shuts down Medical equipment malfunctions
Surveying a Solar Power Generation System
S
urvey Objective
The power supply of a printer at the office shuts down even
though it is not operated. Equipment other than the printer can also
sometimes perform a reset unexpectedly.
S
urvey Objective
Replacing the equipment with a new one by the service pro-
vider did not improve the malfunction. A survey of the power supply
was required to clarify the cause.
S
urvey Objective
•
Maintain a solar power generation system and check its operation (verify the power quality)
• Troubleshoot (impact on the peripheral equipment, operation shutdown, etc.)
M
easurement Method
Select the “U Events” course in the PW3198 in the same way
as with the office equipment example.
M
easurement Method
Set up the PW3198 on the site and measure the voltage, cur-
rent, and power. To survey the power quality, select the “Standard
power quality measurement” course in the PRESETS menu. To
measure the DC voltage, connect
channel 4 to the primary
side of the solar panel.
A
nalysis Report
All parameters can be recorded simultaneously with a single measurement.
• Identify changes in the output voltage of the power conditioner
• Presence or absence of the occurrence of a transient overvoltage
• Frequency fluctuation important for system interconnection
•
Identify changes in the harmonic voltage and current included in the output
• Power (AC), integral power (AC), etc.
Example of Voltage Waveforms at the Time of Line Switching
Example of Determining Inow or Outow
(Inow of 5th and 7th Order Harmonic)
Outow
Outow
Inow
Connection Example
Primary DC
measurement
(ch4)
Secondary AC
measurement
(ch1 and ch2)
Solar panel
Power conditioner
A
nalysis Report
It was determined that a voltage dip (voltage drop) occurred
and impacted the operation of the equipment. If a voltage dip
occurs every day on a regular basis, the probable cause is the start
of a large air-conditioning unit, pump, heater, or similar equipment.
A
nalysis Report
No failure occurred during the measurement period, but a
periodic voltage drop was confirmed. The voltage drop may have
been caused by the periodic start and operation of the electrical
equipment connected to the power supply line. Equipment, such as
a laser printer, copier, and electrical heater, may start themselves
periodically due to residual heat. An instantaneous voltage drop is
likely to have been caused by inrush current from equipment that
consumes a large amount of power.
Voltage drop occurs periodically
Voltage dip occurs
Voltage waveforms
Current waveforms
Voltage Fluctuation Graph Voltage and Current Waveforms at the Time Voltage Dip Occurs
M
easurement Method
Setup is very easy. Just install the PW3198 on the site,
and measure the voltage, current, and power. To troubleshoot,
just select the clamp-on sensor and wiring, and then select the
“U Events” course.
Line

Hioki PW3198 Specifications

General

Brand	Hioki
Model	PW3198
Category	Measuring Instruments
Language	English