Mitsubishi Electric CITY MULTI PUHY-P-YKB-A1 Manuel D'installation page 37

・Wiring example
Ⓐ
3N~380–415 V
L1, L2, L3, N
Ⓐ
~220–240 V
L, N
・Be sure to use the appropriate type of overcurrent breaker. Note that generated overcurrent may include some
amount of direct current.
・Select the type of breaker for an inverter circuit as an earth leakage breaker. (Mitsubishi Electric NV-S series or its
equivalent)
・The earth leakage breaker should be used in combination with a local switch.
・Use a local switch with at least 3 mm (1/8 in) contact separation in each pole.
・Do not connect the power cables L1, L2, and L3 to N. Ensure the correct phase sequence.
・If the power cable is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
・Use dedicated power cables for the outdoor unit and indoor unit. Ensure OC and OS are wired individually.
・Power cable size, device capacity, and system impedance
(If local regulations do not specify the minimum power cable size or device capacity, follow the values in the table
below.)
P200 4.0 (12)
P250 4.0 (12)
P300 4.0 (12)
Outdoor
P350 6.0 (10)
unit
P400 10.0 (8)
P450 10.0 (8)
P500 10.0 (8)
F0 ≤ 16 A * 1.5 (16)
1
Total
operating
current of F0 ≤ 25 A * 2.5 (14)
1
the indoor
units
F0 ≤ 32 A * 1 4.0 (12)
*1 : Use the larger value of F1 or F2 as the value of F0.
F1 = Total of each indoor unit's maximum current × 1.2
F2 = {V1 × (Quantity of Type 1)/C} + {V1 × (Quantity of Type 2)/C} + {V1 × (Quantity of Type 3)/C} + {V1 × (Quantity of Type 4)/C}
*2 : Current sensitivity is calculated using the following formula.
G1 = (V2 × Quantity of Type 1) + (V2 × Quantity of Type 2) + (V2 × Quantity of Type 3) + (V2 × Quantity of Type 4) +
(V3 × Power cable length (km))
KD79S703H01
Ⓑ
Ⓒ
Ⓕ
Ⓑ
Ⓔ Ⓔ
Ⓕ Ⓕ
Minimum size [mm (AWG)]
2
Power cable
Power Earth
after branching
cable wire
point
– 4.0 (12)
– 4.0 (12)
– 4.0 (12)
– 6.0 (10)
– 10.0 (8)
– 10.0 (8)
– 10.0 (8)
1.5 (16) 1.5 (16)
2.5 (14) 2.5 (14)
4.0 (12) 4.0 (12)
Ⓓ
Ⓔ Ⓔ
Ⓕ Ⓕ
Local switch (A)
Earth leakage breaker
Capacity
30 A 100 mA 0.1 sec.
25
or less
30 A 100 mA 0.1 sec.
32
or less
30 A 100 mA 0.1 sec.
32
or less
40 A 100 mA 0.1 sec.
40
or less
60 A 100 mA 0.1 sec.
63
or less
60 A 100 mA 0.1 sec.
63
or less
60 A 100 mA 0.1 sec.
63
or less
20 A current sensitivity
16
*
2
30 A current sensitivity
25
*
2
40 A current sensitivity
32
* 2
GB-35
Earth leakage breaker
Ⓐ
Local switch (Overcurrent breaker and earth
Ⓑ
leakage breaker)
Outdoor unit
Ⓒ
Pull box
Ⓓ
Indoor unit
Ⓔ
Earth
Ⓕ
Overcurrent
breaker allowable system
Fuse
(NFB) (A)
25 30 (IEC 61000-3-3)
32 30 (IEC 61000-3-3)
32 30 (IEC 61000-3-3)
40 40
63 60
63 60
63 60
16 20 (IEC 61000-3-3)
25 30 (IEC 61000-3-3)
32 40 (IEC 61000-3-3)
Maximum
impedance
0.25 Ω
0.22 Ω
0.19 Ω
0.16 Ω