Mitsubishi Electric City Multi R2 Series Installation Manual page 44

・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.)
(E)P200
(E)P250
(E)P300
(E)P350
Outdoor
unit
(E)P400
(E)P450
(E)P500
(E)P550
1
Total
operating
current of 1
the indoor
units
1
*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))
*3 Meets technical requirements of IEC 61000-3-3.
WT08432X01
Ⓑ
Ⓒ
Ⓕ
Ⓖ
Ⓑ
Ⓔ
Ⓕ Ⓕ
Minimum size [mm 2 (AWG)]
Power cable
Power Earth
after branching
cable wire
point
4.0 (12) – 4.0 (12)
4.0 (12) – 4.0 (12)
4.0 (12) – 4.0 (12)
6.0 (10) – 6.0 (10)
10.0 (8) – 10.0 (8)
10.0 (8) – 10.0 (8)
10.0 (8) – 10.0 (8)
10.0 (8) – 10.0 (8)
1.5 (16) 1.5 (16) 1.5 (16)
2.5 (14) 2.5 (14) 2.5 (14)
4.0 (12) 4.0 (12) 4.0 (12)
Ⓗ
Ⓓ
Ⓔ Ⓔ Ⓔ
Ⓕ Ⓕ
Earth leakage breaker
30 A 100 mA 0.1 sec.
or less
30 A 100 mA 0.1 sec.
or less
30 A 100 mA 0.1 sec.
or less
40 A 100 mA 0.1 sec.
or less
60 A 100 mA 0.1 sec.
or less
60 A 100 mA 0.1 sec.
or less
60 A 100 mA 0.1 sec.
or less
60 A 100 mA 0.1 sec.
or less
20 A current sensitivity
* 2
30 A current sensitivity
* 2
40 A current sensitivity
2
*
GB-42
Ⓐ
Earth leakage breaker
Ⓑ
Local switch (Overcurrent breaker and earth
leakage breaker)
Ⓒ
Outdoor unit
Ⓓ
Pull box
Ⓔ
Indoor unit
Ⓕ
Earth
Ⓖ
Main BC controller
Ⓗ
In an R2 system: Sub BC controller
In a Hybrid City Multi system: Sub-HBC
Local switch (A)
Overcurrent
breaker
Capacity Fuse
(NFB) (A)
25 25 30
32 32 30
32 32 30
40 40 40
63 63 60
63 63 60
63 63 60
63 63 60
16 16 20
25 25 30
32 32 40
Maximum
allowable system
impedance
* 3
3
*
* 3
(IEC 61000-3-3)
(IEC 61000-3-3)
(IEC 61000-3-3)