Honeywell SmartDrive HVAC Installation Manual page 25

Honeywell
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4.1.1.2 Cable and fuse sizes, frames MR7 to MR9
The recommended fuse types are gG/gL (IEC 60269-1) or class T (UL & CSA). The fuse volt-
age rating should be selected according to the supply network. The final selection should be
made according to local regulations, cable installation conditions and cable specification. Big-
ger fuses than what is recommended below shall not be used.
Check that the fuse operating time is less than 0.4 seconds. Operating time depends on used
fuse type and impedance of the supply circuit. Consult the factory about faster fuses. Honey-
well offers recommendations also for high speed J (UL & CSA ), aR (UL recognized, IEC
60269-4) and gS (IEC 60269-4) fuse ranges.
Frame Type
230 18P
400 37P
230 22P
MR7
400 45P
230 30P
400 55P
230 37P
400 75P
230 45P
MR8
400 90P
230 55P
400 110
230 75P
400 132
MR9
230 90P
400 160
The cable dimensioning is based on the criteria of the International Standard IEC60364-5-52:Cables
must be PVC-isolated; Max ambient temperature +30°C, max temperature of cable surface +70°C; Use
only cables with concentric copper shield; Max number of parallel cables is 9.
When using cables in parallel,
area and the max number of cables must be observed.
For important information on the requirements of the earthing conductor, see chapter Earthing and earth
fault protection of the standard.
For the correction factors for each temperature, see International Standard IEC60364-5-52.
Fuse
I
L
(gG/gL)
[A]
[A]
75.0
80
72.0
88.0
100
87.0
105.0
125
105.0
143.0
160
140.0
170.0
200
170.0
208.0
250
205.0
261.0
315
261.0
310.0
350
310.0
Table 15. Cable and fuse sizes
NOTE HOWEVER
Mains and
motor cable
Main terminal
2
Cu [mm ]
3*35+16 (Cu)
6-70 mm
3*50+16 (Al)
3*35+16 (Cu)
6-70 mm
3*70+21 (Al)
3*50+25 (Cu)
6-70 mm
3*70+21 (Al)
3*70+35 (Cu)
Bolt size M8
3*95+29 (Al)
3*95+50 (Cu)
Bolt size M8
3*150+41 (Al)
3*120+70 (Cu)
Bolt size M8
3*185+57 (Al)
3*185+95 (Cu)
2*3*120+41 Bolt size M8
(Al)
2*3*95+50 (Cu)
2*3*120+41 Bolt size M8
(Al)
that the requirements of both the cross-sectional
P
OWER CABLING
Terminal cable size
Earth
terminal
Cu/Al 6-70 mm
2
Cu/Al 6-70 mm
2
Cu/Al 6-70 mm
2
Bolt size M8
Bolt size M8
Bolt size M8
Bolt size M8
Bolt size M8
2
2
2