Kikusui KHA3000, Руководство по эксплуатации, Страница: 51 / 392

3
KHA3000
51
Common Information on Measurement Circuits
W
iring M
easurem
ent Circuits
Parts to be Prepared by the Customer
●
Electric wire
Used to connect the devices of a measurement circuit
●
Crimping terminal
Attached to the end of an electric wire to securely connect the wire to the terminal of a
device
●
Relay outlet
Used when the EUT uses a power cord with a plug
●
The following four types of impedance are used according to limit value standards
IEC 61000-3-11 and IEC 61000-3-12:
• 0.25

+ jn0.25

(single-phase)
• 0.15

+ jn0.15

(three-phase)
• 0.10

+ jn0.10

(three-phase neutral wire)
• The voltage drop caused by the EUT falls within the range from 3 % to 5 % of the voltage
and the ratio of the reactance component to the resistance component falls within the
range from 0.5 to 0.75.
Selecting the Type of Electric Wire
Select the type of wire according to the input current of the EUT. For a rough idea for
selection, the table below lists nominal sectional areas of wire and the corresponding
permissible current values.
Use a crimping terminal to terminate the wire. The crimping terminal must have a screw
mounting hole with a diameter of 6 mm and fit the wire. When the EUT uses a power cord
with a plug, connect the wire to the LOAD terminals using a relay outlet. Do the same for the
wire used for the relay outlet.
L
N
G
Nominal sectional
area [mm
2
]
AWG (Reference
sectional area)
[mm
2
]
Permissible current
*1
[A]
(Ta = 30
°C
)
*1. Excerpt from Japanese laws related to electrical equipment
Current
recommended by
Kikusui [A]
2 14 (2.08) 27 10
3.5 12 (3.31) 37 -
5.5 10 (5.26) 49 20
8 8 (8.37) 61 30
14 6 (13.3) 88 50
• Kikusui recommends wire of a nominal sectional area of 8 mm
2
or larger. Use as short a wire
as possible. Kikusui recommends a wire length of 1.5 m or shorter. For the test system, note
the IEC 61000-4-7 standard requirements (voltage drop by wiring impedance).