GE AF-600 FP Series, Руководство по эксплуатации

Страница: 65 / 138

Illustration 4.36 Unit Size 63
Illustration 4.37 Unit Size 64
4.3.9 IP21 Drip Shield Installation (Unit
Sizes 41 and 42)
To comply with the IP21 rating, a separate drip shield is
to be installed as explained below:
•
Remove the two front screws
•
Insert the drip shield and replace screws
•
Torque the screws to 5,6 Nm (50 in-lbs)
Illustration 4.38 Drip shield installation.
4.4 Field Installation of Options
4.4.1 Installation of Top-only Duct Cooling
Kit
This description is for the installation of the top section
only of the back-channel cooling kits available for unit
sizes 43, 44 and 52. In addition to the enclosure a 200 mm
vented pedestal is required.
The minimum enclosure depth is 500 mm (600 mm for
unit size 52) and the minimum enclosure width is 600 mm
(800 mm for unit size 52). The maximum depth and width
are as required by the installation. When using multiple
frequency converters in one enclosure mount each drive
on its own back panel and support along the mid-section
of the panel. The back-channel cooling kits are very similar
in construction for all frames. The kits do not support “in
frame” mounting of the frequency converters. The 52 kit is
mounted “in frame” for additional support of the
frequency converter.
Using these kits as described removes 85% of the losses
via the back channel using the drive’s main heat sink fan.
The remaining 15% must be removed via the door of the
enclosure.
Ordering information
Unit size 43 and 44: OPCDUCT4344T
Unit size 52: OPCDUCT52T
4.4.2 Installation of Top and Bottom Covers
Top and bottom covers can be installed on unit sizes 43,
44 and 52. These kits are designed to be used to direct the
back-channel airflow in and out the back of the drive as
opposed to in the bottom and out the top of the drive
(when the drives are being mounted directly on a wall or
inside a welded enclosure).
Notes:
1. If external duct work is added to the exhaust
path of the drive, additional back pressure will be
created that will reduce the cooling of the drive.
The drive must be derated to accommodate the
reduced cooling. First, the pressure drop must be
calculated, then refer to the derating tables
located earlier in this section.
2. A doorfan(s) is required on the enclosure to
remove the heat losses not contained in the
backchannel of the drive and any additional
losses generated from other components installed
inside the enclosure. The total required air flow
must be calculated so that the appropriate fans
can be selected. Some enclosure manufacturers
Mechanical Installation AF-600 FP High Power Operating Instructions
64
4 4