Danfoss VLT AutomationDrive FC 300 Design Manual page 158

Mechanical Installation
Drive type
6-Pulse
6 6
12-Pulse
Table 6.62 Heatsink and Front Channel Airflow
* Airflow per fan. F-frames contain multiple fans.
D-frame cooling fans
All frequency converters in this size range are equipped
with cooling fans to provide airflow along the heatsink.
Units in IP21 (NEMA 1) and IP54 (NEMA 12) enclosures
have a fan mounted in the enclosure door to provide more
airflow to the unit. IP20 enclosures have a fan mounted to
the top of the unit for more cooling. There is a small 24 V
DC mixing fan mounted under the input plate. This fan
operates anytime the frequency converter is powered on.
DC voltage from the power card powers the fans. The
mixing fan is powered by 24 V DC from the main switch
mode power supply. The heatsink fan and the door/top
fan are powered by 48 V DC from a dedicated switch
mode power supply on the power card. Each fan has
tachometer feedback to the control card to confirm that
the fan is operating correctly. On/off and speed control of
the fans is provided to reduce overall acoustical noise and
extend the life of the fans.
The following conditions activate fans on the D-frame:
•
Output current greater than 60% of nominal
•
IGBT over temperature
•
IGBT low temperature
•
Control card over temperature
•
DC hold active
•
DC brake active
•
Dynamic brake circuit active
•
During pre-magnetization of the motor
•
AMA in progress
156
®
VLT
Drive size
380-480 V (T5) 525-690 V (T7)
N110 to N160 N75 to N160
N200 to N315 N200 to N400
- P450 to P500
P355 to P450 P560 to P630
P500 to P1M0 P710 to P1M4
P315 to P1M0 P450 to P1M4
AutomationDrive FC 300 Design Guide 90-1200 kW
Enclosure
Frame size
protection
IP21/NEMA 1 or
D1h, D5h, D6h IP54/NEMA 12
D3h IP20/chassis
IP21/NEMA 1 or
D2h, D7h, D8h IP54/NEMA 12
D4h IP20/chassis
IP21/NEMA 1 or
E1 IP54/NEMA 12
E2 IP00/chassis
IP21/NEMA 1 or
E1
IP54/NEMA 12
E2 IP00/chassis
IP21/NEMA 1
F1/F3, F2/F4
IP54/NEMA 12
F8/F9, F10/F11, IP21/NEMA 1
F12/F13
IP54/NEMA 12
In addition to these conditions, the fans are always started
shortly after mains input power is applied to the frequency
converter. Once fans are started, they run for a minimum
of one minute.
The following conditions activate fans on the E- and F-
frames:
1. AMA
2. DC Hold
3. Pre-Mag
4. DC Brake
5. 60% of nominal current is exceeded
6. Specific heatsink temperature exceeded (power
size dependent)
7. Specific power card ambient temperature
exceeded (power-size dependent)
8. Specific control card ambient temperature
exceeded
External ducts
If more duct work is added externally to the Rittal cabinet
the pressure drop in the ducting must be calculated. Use
the derating charts to derate the frequency converter
according to the pressure drop.
MG34S202 - Rev. 2013-08-19
Airflow m3/h (cfm)
Door fan(s)/Top
fan Heatsink fan(s)
102 (60) 420 (250)
204 (120) 840 (500)
340 (200) 1105 (650)
255 (150)
340 (200)
1445 (850)
255 (150)
700 (412)
985 (580)
525 (309)
700 (412)
985 (580)
525 (309)