Mitsubishi Electric CITY MULTI PKFY-P VLM Series Installation Manual page 10

6. Electrical work
Total operating current of the indoor unit
F0 = 16 A or less *2
F0 = 25 A or less *2
F0 = 32 A 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-VEM, PMFY-VBM, PEFY-VMS, PCFY-VKM, PKFY-VKM,
PLFY-VCM, PLFY-VFM, PKFY-VLM
Type 2 PEFY-VMA
Type 3 PEFY-VMHS
Others Other indoor unit
C : Multiple of tripping current at tripping time 0.01 s
Please pick up "C" from the tripping characteristic of the breaker.
<Example of "F2" calculation>
*Condition PEFY-VMS × 4 + PEFY-VMA × 1, C = 8 (refer to right sample chart)
F2 = 19.8 × 4/8 + 38 × 1/8
= 14.65
→ 16 A breaker (Tripping current = 8 × 16 A at 0.01 s)
*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 0.1 sec or less
100 or less 100 mA 0.1 sec or less
Wire thickness
2
1.5 mm
2
2.5 mm
4.0 mm 2
6.3. Types of control cables
1. Wiring transmission cables
Types of transmission cable
Cable diameter
Length
2. M-NET Remote control cables
Types of remote control cable
Cable diameter
Length
3. MA Remote control cables
Types of remote control cable
Cable diameter
Length
10
RH79A015H01_en.indd 10
Minimum wire thickness (mm²)
Main cable Branch Ground
1.5 1.5
2.5 2.5
4.0 4.0
V3
48
56
66
Shielding wire CVVS or CPEVS
More than 1.25 mm
2
Less than 200 m
Shielding wire MVVS
More than 0.5 to 1.25 mm
2
Add any portion in excess of 10 m to within the longest allowable
transmission cable length 200 m.
2-core cable (unshielded)
0.3 to 1.25 mm
2
Less than 200 m
Ground-fault interrupter *1
1.5 20 A current sensitivity *3
2.5 30 A current sensitivity *3
4.0 40 A current sensitivity *3
V1 V2
19.8 2.4
38 1.6
13.8 4.8
0 0
Local switch (A)
Breaker for wiring
(NFB)
Capacity Fuse
16 16 20
25 25 30
32 32 40
Sample chart
6000
600
SAMPLE
60
10
1
0.1
0.01
1 2 3 4 6 8 10
C
Rated Tripping current (x)
20
2019/02/01 16:14:06