Cooling And Airflow (125 Hp And Above) - GE AF-650 GP Design And Installation Manual

Installation

2.3.2 Cooling and Airflow (125 hp and above)

Cooling
Cooling can be obtained in different ways, by using the cooling ducts in the bottom and the top of the unit, by taking air in
and out the back of the unit or by combining the cooling possibilities.
2 2
Duct cooling
A back-channel cooling kit is available to direct the heat sink cooling air out of the panel when an IP20/chassis frequency
converter is installed in a Rittal enclosure. Use of this kit reduces the heat in the panel and smaller door fans can be
specified on the enclosure.
Back cooling
The back channel cooling air can be ventilated out of the room so that the heat from the back channel is not dissipated
into the control room. A door fan(s) is required on the enclosure to remove the heat not contained in the backchannel of
the frequency converters and any additional losses generated by other components inside the enclosure. The total required
air flow must be calculated so that the appropriate fans can be selected.
Airflow
The necessary airflow over the heat sink must be secured. The flow rate is in Table 2.2.
Protection
IP20/Chassis
IP00/Chassis
IP21/Nema 1
IP54/Nema 12
Table 2.2 Heat sink Airflow
1) Airflow per fan. Unit Sizes 6X contain multiple fans.
16
Unit size Door fan(s)/Top fan
43h 102 m
44h
204 m
51
340 m
41h
102 m
42h
204 m
52
255 m
61, 62, 63, 64 700 m
41h
102 m
42h
204 m
52 255 m
61, 62, 63, 64
525 m
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3
/hr (60 CFM)
3
/hr (120 CFM)
3
/h (200 cfm)
3
/hr (60 CFM)
3
/hr (120 CFM)
3
/h (150 cfm)
3 1)
/h (412 cfm)
3
/hr (60 CFM)
3
/hr (120 CFM)
3
3/h (150 cfm)
3 1)
/h (309 cfm)
Heat sink fan(s)
3
420 m /hr (250 CFM)
3
840 m /hr (500 CFM)
3
1445 m /h (850 cfm)
3
420 m /hr (250 CFM)
3
840 m /hr (500 CFM)
3
1445 m /h (650 cfm)
3 1)
985 m /h (580 cfm)
3
420 m /hr (250 CFM)
3
840 m /hr (500 CFM)
3
1445 m /h (650 cfm)
3 1)
985 m /h (580 cfm)
MG35M402