Kikusui KHA3000, Operation Manual, Page: 62 / 392

62
KHA3000
Using external current shunts
When the current of the device to be measured exceeds the maximum current range of this
product, external current shunts may be connected. Here, the connections for single-phase
two-wire (1P2W), single-phase three-wire (1P3W), three-phase three-wire (3P3W), and
three-phase four-wire (3P4W) systems are described. The impedance shown is used in the
flicker tests. Except for some special cases, the impedance will not be used in the harmonic
current tests.
The voltmeter is for the connection to external measurement points.
L1, L2, and L3 are the three input phases (channels). L1 will be the reference phase for the
measurement. Be sure to connect L1.
Circuit diagram
Single-phase two-wire (1P2W) circuit
Single-phase three-wire (1P3W) circuit
WARNING
• This work has a risk of electric shock. For the AC power supply used for the
measurement circuit, be sure to disconnect the power cord from the outlet, turn off
the switch on the switchboard to which the power cord is connected, and turn off the
POWER switch.
CAUTION
Terminal G of this product is not a protective conductor terminal. It is not grounded even if
the wire is connected to terminal G. For terminals G and N, the respective SOURCE and
LOAD terminals are short-circuited internally.
A
V
L1
N
G
V
SOURCE LOAD
KHA3000
EXT INPUT
L
N
G
L
N
G
AC power
supply
Impedance
network
EUT
External
current shunt
A
V
L1
V
SOURCE LOAD
KHA3000
EXT INPUT
A
V
L2
N
G
V
EXT INPUT
L1
L2
N
G
L2
N
G
AC power
supply
Impedance
network
EUT
External
current shunt