Mitsubishi Electric PLFY-WP VBM-E Installation Manual page 8

Electrical or
Total operating current of the indoor unit
F 16 A or less *2
F 25 A or less *2
F 32 A or less *2
Apply to IEC61 -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 F .
F1 Total operating maximum current of the indoor units × 1.2
F2 1 × (Quantity of Type1) C
Indoor unit
Type 1 PLF - BM, PEF - MS, PFF - LRMM
Type 2 PEF - MA
C : Multiple of tripping current at tripping time . 1s
Please pick up C from the tripping characteristic of the breaker.
Example of F2 calculation
*Condition PEF - MS × 4 PEF - MA × 1, C
F2 1 .6 × 4 3 × 1
14. 5
16 A breaker (Tripping current
*3 Current sensitivity is calculated using the following formula.
G1 2 × (Quantity of Type1) 2 × (Quantity of Type2)
3 × (Wire length[km])
G1 Current sensitivity
3 or less 3 mA
1 or less 1 mA
Wire thickness
2
1.5 mm
2
2.5 mm
2
4. mm
8
Minimum wire thickness (mm²)
Main cable Branch
1.5 1.5
2.5 2.5
4. 4.
1 × (Quantity of Type2) C 1 × (Quantity of Type3) C
1
1 .6
3
(refer to right sample chart)
× 16 A at . 1s)
2 × (Quantity of Type3)
.1sec or less
.1sec or less
3
4
56
66
Ground-fault interrupter *1
Ground
1.5 2 A current sensitivity *3
2.5 3 A current sensitivity *3
4. 4 A current sensitivity *3
1 × (Quantity of Others) C
2
2.4
1.6
2 × (Quantity of Others)
T pes o control ca les
Wiring trans ission ca les
Types of transmission cable
Cable diameter
Length
2 M-NET Re ote control ca les
Types of remote control cable Shielding wire M
Cable diameter
Length
MA Re ote control ca les
Types of remote control cable 2-core cable (unshielded)
Cable diameter
Length
Local switch (A)
Breaker for wiring
(NFB)
Capacity Fuse
16 16
25 25
32 32
Sample chart
6000
600
SAMPLE
60
10
1
0.1
0.01
1 2 3 4 6 8 10
C
Rated Tripping current (x)
Shielding wire C S or CPE S
More than 1.25 mm²
Less than 2 m
S
.5 to 1.25 mm²
Add any portion in excess of 1 m to within the
longest allowable transmission cable length 2
.3 to 1.25 mm²
Less than 2 m
2
3
4
20
m