Kikusui PWX1500H, Руководство пользователя

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PWX
19
1
Inst
allation
and Prep
aratio
n
Load Cables
 The cables’ allowable current depends on the insulation’s maximum allow-
able temperature.
A cable’s temperature is determined by the resistive loss based on the current, the ambient
temperature, and the cable’s external thermal resistance. The following table shows the cur-
rent capacity of heat-resistant vinyl wires that have a maximum allowable temperature of
60°C, assuming that a wire is stretched out horizontally in air in an ambient temperature of
30°C. The current capacity must be reduced under certain conditions, such as when vinyl
cables that have a low heat resistance are used, when the ambient temperature is 30 °C or
greater, or when cables are bundled together and little heat is radiated.
 Taking measures against noise
When connecting wires that have the same heat resistance, separating the wires as much as
possible to increase heat radiation enables a greater amount of current to flow. However, wir-
ing the + (positive) and - (negative) output wires of the load cable side by side or bundling
them together is more effective against unwanted noise. The Kikusui-recommended currents
shown in the above table are allowable currents that have been reduced in consideration of
the potential bundling of load cables. Use these values as a guideline when connecting load
cables.
 Limitations of the remote sensing function
All wires have resistance. As the wire becomes longer or the current becomes larger, the volt-
age drop in the wire becomes greater. This results in a smaller voltage being applied at the
load end. The PWX series has a sensing function that compensates for this voltage drop up
to approximately 4 V for a single line. If the voltage drop exceeds this level, use wires that
have a greater cross-sectional area.
WARNING
Risk of fire.
• Use load cables whose capacity is adequate for the PWX series rated output current.
• The output connector and its surrounding area become hot. Use cables whose cov-
ers have heat resistance at 85 °C and higher.
Risk of electric shock.
• Use load cables whose rated voltage meets or exceeds the PWX series isolation volt-
age.
Nominal cross-sectional
area [mm
2
]
AWG (reference cross-
sectional area) [mm
2
]
Allowable current
1
[A]
(Ta = 30 °C)
1 Excerpt from Japanese laws related to electrical equipment.
Kikusui-recommended
current [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
22 4 (21.15) 115 80
30 2 (33.62) 139 -
38 1 (42.41) 162 100
50 1/0 (53.49) 190 -
60 2/0 (67.43) 217 -
80 3/0 (85.01) 257 200
100 4/0 (107.2) 298 -
125 - - 344 -
150 - - 395 300
200 - - 469 -