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Specification of electronic wire
Power supply
MCCB
Max : 242V
15A, 30mmA
15A
Min : 198V
Decide the power cable specification and maximum length within 10%
power drop among indoor units.
n
∑ (
k=1
coef: 1.55
: Distance among each indoor unit[m], A
L
k
i
: Running current of each unit[A]
k
Example of Installation
- Total power cable length L = 100(m), Running current of each units 1[A]
- Total 10 indoor units were installed
10[A]
MCCB
0[m]
Apply following equation.
n
Coef×35.6×L
∑ (
1000×A
k=1
When using 2mm
2
power cable
-2.8[V]
220[V]
-(2.8+2.5+2.2+1.9+1.7+1.4+1.1+0.8+0.6+0.3)=-15.1[V]
When using both 2mm
3.5[mm
]
2
-1.6[V]
220[V]
218.4[V]
3.5[mm
]
2
-1.6[V]
220[V]
218.4[V]
ELB
Power cable Earth cable
2
2.0mm
2.0mm
0.1 sec
Coef×35.6×L
×i
k
k
) <20[V]
1000×A
k
: Power cable specification[mm
k
9[A]
Indoor unit1
10[m]
20[m]
×i
k
k
) <20[V]
k
-2.5[V]
2
and 3.5mm
2
power cables
2[mm
-(2.5+2.2+1.9+1.7+1.4+1.1+0.8+0.6+0.3)=-12.4[V]
-1.4[V]
-(2.2+1.9+1.7+1.4+1.1+0.8+0.6+0.3)
217[V]
Communication
cable
2
2
0.75~1.25mm
2
]
1[A]
Indoor unit2
2[mm
]
2
]
2
2[mm
]
2
=-9.9[V]
Indoor unit10
100[m]
204.9[V]
206[V]
207.1[V]
23
E-
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