Kikusui KHA3000, Operation Manual, Page: 53 / 392

3
KHA3000
53
Common Information on Measurement Circuits
W
iring M
easurem
ent Circuits
Mechanism of Voltage Measurement
The figure below shows voltage terminal switching circuits. In the single-phase two-wire,
single-phase three-wire and three-phase four-wire circuits, the switch provided on one end of
each voltmeter connects the voltmeter of each phase between L1 and N, L2 and N, or L3 and
N.
In the three-phase three-wire circuit, the voltmeter of each phase is connected between L1
and L2, L2 and L3, or L3 or L1.
WARNING
• If the input voltage exceeds 400 Vrms, the primary circuit of equipment connected
directly to an outlet (CAT II) cannot be measured. Only the circuit that is not directly
connected to a commercial power supply (CAT I) is measured.
• With the input voltage equal to or less than 400 Vrms, the circuit that is not directly
connected to a commercial power supply (CAT I) and the primary circuit of
equipment connected directly to an outlet (CAT II) can be measured.
Item Performance Remarks
Maximum input voltage 600 Vrms/900 Vpeak Voltage input terminals and current input terminals
between L1 and N, L2 and N, L3 and N, L1 and
L2, L2 and L3, and L3 and L1
Measurement category CAT I
*1
between 500
Vrms (exclusive) and 600 Vrms
Measurement category CAT II
*2
below 400 Vrms
*1. Used to measure circuits that are not directly connected to a commercial power supply
*2. Used to measure the primary circuit of equipment (home appliances, portable tools, etc.) that
is directly connected to a low voltage facility such as outlets
Maximum input current 40 Arms/100 Apeak Current input terminal
Instrument loss (input
resistance) of voltage
measurement About 4.7 M  Voltage input terminals between L1 and N, L2 and
N, L3 and N, L1 and L2, L2 and L3, and L3 and L1
Instrument loss (input
resistance) of voltage
measurement About 3.5 m  Current input terminal
A
V
A
V
A
V
G
N
V
L1
L2
L3
V
V
V
SOURCE LOAD
KHA3000
VOLTAGE
SENSING/INPUT
A
V
L1
L2
L3
N
න⋧㧞✢
න⋧㧟✢
ਃ⋧㧠✢
3P3W
1P2W
1P3W
3P4W