Publicité
4.4 Selecting And Preparing The
Electrical Wiring
4.4.1 Electrical compliance
This equipment conforms to:
EN/IEC 61000-3-12 specifications which states that the
short circuit capacity (of the power supply), Ssc, is
greater than or equal to the minimum Ssc value of the
interface point between the user's power supply and the
public system.
The
installation
personnel
responsibility
to
consult
operators when necessary to ensure that the equipment
only connects to a power supply with short circuit
capacity, Ssc, greater than or equal to the minimum Ssc
value.
Capacity
20/22.4kW
28kW
33.5kW
Note:
The European / international technical standards
specified a harmonic current limit for devices connected
to a public low-voltage system where the input current
of each phase > 16 A and ≤ 75 A.
Table 4.8
Outdoor Unit
System
Voltage
Frequency
(V)
(Hz)
20kW
380-415
50/60
22.4kW
380-415
50/60
380-415
50/60
28kW
33.5kW
380-415
50/60
Phase and frequency of power supply system: 3N~ 50/60Hz, Voltage: 380-415V
Abbreviations:
MCA: Minimum Circuit Amps; TOCA: Total Over-current Amps; MFA: Maximum Fuse Amps; MSC: Maximum Starting
Current (A); RLA: Rated Load Amps; FLA: Fan Load Amps.
Units are suitable for use on electrical systems where voltage supplied to unit terminals is not below or above listed range
limits. Maximum allowable voltage variation between phases is 2%.
Select wire size based on the value of MCA.
TOCA indicates the total overcurrent amps value of each OC set.
MFA is used to select overcurrent circuit breakers and residual-current circuit breakers.
MSC indicates the maximum current on compressor start-up in amps.
RLA is based on the following conditions: indoor temperature 27°C DB, 19°C WB; outdoor temperature 35°C DB.
or
users
have
the
the
distribution
network
Table 4.6
Minimum Ssc value(kW)
4607
5092
6401
Min.
Max.
MCA
(V)
(V)
(A)
342
456
19.0
342
456
19.0
342
456
21.0
342
456
26.4
INFORMATION
i
4.4.2 Safety device requirements
1. Select
the
wire
individually for each unit based on the table 4.7 and
table 4.8， where the rated current in table 4.7 means
MCA in table 4.8.
2. Maximum allowable voltage range variation between
phases is 2%.
3. Select circuit breaker that having a contact separation
in all poles not less than 3 mm providing full
disconnection, where MFA is used to select the
current circuit breakers and residual current operation
breakers:
Nominal cross-sectional area (mm
Rated current
of appliance
（A）
≤ 3
> 3 and ≤ 6
> 6 and ≤ 10
> 10 and ≤ 16
> 16 and ≤ 25
> 25 and ≤ 32
> 32 and ≤ 50
> 50 and ≤ 63
Power Current
Compressor
TOCA
MFA
MSC
(A)
(A)
(A)
24.3
25
-
24.3
25
-
24.3
25
-
33.2
32
-
16
diameters(
minimum
Table 4.7
Cable for fixed
Flexible cords
wiring
1 to 2.5
0.5 and 0.75
1 to 2.5
0.75 and 1
1 to 2.5
1 and 1.5
1.5 to 4
1.5 and 2.5
2.5 to 6
2.5 and 4
4 to 10
4 and 6
6 to 16
6 and 10
10 to 25
10 and 16
Fan Motor
RLA
Power
FLA
(A)
(kW)
(A)
12.0
0.17+0.17
2.1+2.1
12.4
0.17+0.17
2.1+2.1
18.4
0.17+0.17
2.1+2.1
19.6
0.17+0.17
2.1+2.1
value)
2
)
V.1
Publicité
