Safety
information
Product
information
Mechanical
installation
Electrical
installation
Getting
started
Basic
parameters
Running the
motor
Optimization
NV Media Card
Operation
Building
Automation
Advanced
parameters
Technical
data
Diagnostics
UL listing
information
88 HVAC Drive H300
Issue Number: 3
In low voltage mode only, with frame size 9 to 11, a 24 V supply needs to be provided for the heatsink fan. The fan supply should be connected to
terminal 61 and 62.
Figure 4-19 Location of the heatsink fan supply connector on size 9 to 11
4.7 Heatsink fan supply
When operating on normal mains supply the heatsink fan on all drive sizes is supplied internally by the drive. When operating size 9 to 11 in low
voltage mode it is necessary to connect an external 24V supply to terminal 61 and 62 if heatsink fan operation is required. Please see section 4.6 Low
voltage operation on page 87 for more details.
4.8 Ratings
The input current is affected by the supply voltage and impedance.
Typical input current
The values of typical input current are given to aid calculations for power flow and power loss.
The values of typical input current are stated for a balanced supply.
Maximum continuous input current
The values of maximum continuous input current are given to aid the selection of cables and fuses. These values are stated for the worst case
condition with the unusual combination of stiff supply with bad balance. The value stated for the maximum continuous input current would only be
seen in one of the input phases. The current in the other two phases would be significantly lower.
The values of maximum input current are stated for a supply with a 2 % negative phase-sequence imbalance and rated at the supply fault current
given in Table 4-6.
Table 4-6 Supply fault current used to calculate maximum input currents
61 0V common
62 +24 Vdc heatsink fan supply
Size 9 to 11
Nominal operating voltage 24.0 Vdc
Minimum continuous operating voltage 23.5 Vdc
Maximum continuous operating voltage 27 Vdc
Current consumption Size 9 to 10 (all): 6A
Recommended power supply 24 V, 7 A
Recommended fuse 8A fast blow
Model Symmetrical fault level (kA)
All 100
Fuses
The AC supply to the drive must be installed with suitable protection against overload and short-circuits. Table 4-7 shows recommended
fuse ratings. Failure to observe this requirement will cause risk of fire.
To Next Page
Loading...
