Power Supply Wiring - Mitsubishi Electric CITY MULTI PLFY-P NCMU-E Série Manuel D'installation

5. Electrical work
A B
~230V
A
~230V
C
Fig. 5-
Total operating current of the indoor
unit
F0 = 15A or less *2
F0 = 20A or less *2
F0 = 30A or less *2
Apply to IEC61000-3-3 about max. permissive system impedance.
*1 The Ground-fault interrupter should support inverter circuit.
The Ground-fault interrupter should combine using of local switch or wiring breaker.
*2 Please take the larger of F1 or F2 as the value for F0.
F1 = Total operating maximum current of the indoor units × 1.2
F2 = {V1 × (Quantity of Type1)/C} + {V1 × (Quantity of Type2)/C} + {V1 × (Quantity of Type3)/C} + {V1 × (Quantity of Others)/C}
Indoor unit
Type 1 PLFY-NBMU, PMFY-NBMU, PEFY-NMSU,
PCFY-NKMU, PKFY-NHMU, PKFY-NKMU
Type 2 PEFY-NMAU
Type 3 PEFY-NMHSU
Others Other indoor unit
C : Multiple of tripping current at tripping time 0.01s
Please pick up "C" from the tripping characteristic of the breaker.
<Example of "F2" calculation>
*Condition PEFY-NMSU × 4 + PEFY-NMAU × 1, C = 8 (refer to right sample chart)
F2 = 18.6 × 4/8 + 38 × 1/8
= 14.05
→ 16A breaker (Tripping current = 8 × 16A at 0.01s)
*3 Current sensitivity is calculated using the following formula.
G1 = V2 × (Quantity of Type1) + V2 × (Quantity of Type2) + V2 × (Quantity of Type3) + V2 × (Quantity of Others)
+ V3 × (Wire length[km])
G1 Current sensitivity
30 or less 30 mA 0.1sec or less
100 or less 100 mA 0.1sec or less
2
Wire thickness (mm /AWG)
2.1/14
3.3/12
5.3/10
D
C C C C C
B D
L1 L2 GR
M1 M2 S 1 2
TB2 TB5 TB15
Minimum wire thickness (mm²/AWG)
Main cable Branch
2.1/14 2.1/14
3.3/12 3.3/12
5.3/10 5.3/10
V1 V2
18.6 2.4
38 1.6
13.8 4.8
0 0
V3
48
56
66
5.. Power supply wiring
• Install an earth line longer than other cables.
• Power supply codes of appliance shall not be lighter than design 245IEC57 or
227IEC57, 245 IEC 53 or 227 IEC 53.
• A switch with at least 3 mm, 1/8 inch contact separation in each pole shall be
provided by the air conditioner installation.
[Fig. 5-]
Ground-fault interrupter
A
Local switch/Wiring breaker
B
Indoor unit
C
Pull box
D
Ground Capacity Fuse
2.1/14 15 15
3.3/12 20 20
5.3/10 30 30
Breaker for wir-
Ground-fault interrupter *1
ing (NFB)
15 15A current sensitivity *3
20 20A current sensitivity *3
30 30A current sensitivity *3
Sample chart
6000
600
SAMPLE
60
10
1
0.1
0.01
1 2 3 4 6
Rated Tripping current (x)
8 10 20
C
7