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Drive (CDM) Design
T1689 Technical Manual Rev 07
InItial CDM ARRANGEMENT
MV3000 Air Cooled DELTA
Page 86
3.6.1.4
Cooling System
Each DELTA module must be cooled by an MVC3014-4001 fan assembly.
This fan assembly is an integral part of the frame system and locates above the DELTA module. Details for the
installation of this fan assembly are in Section 5.5.
Only one fan may be mounted above each DELTA Power Module. Fan support brackets must be fitted to aid in
the load bearing of the unit.
Consider the cooling path within the cubicle, DELTA power modules are designed to be force ventilated from
an air intake at the bottom of the cubicle and vented at the top of the cubicle. Also consider the type of
cooling air required, for instances where ‘dirty air’ is permitted through the DELTA module, a ‘dirty air’ duct is
available.
The fan assembly itself has the ability to channel air out from the front, top or rear; it is recommended that the
airflow outlet be through the top or rear of the drive enclosure.
Adequate clearance for the fan assembly and any required ducting must be considered for installation and
maintenance.
3.6.2
Enclosure Size
See Section 3.9.1: Enclosure (/s) for other enclosure requirements.
3.6.2.1
Depth
DELTA drives require a minimum enclosure depth of 600 mm. Standard DELTA mounting frames are available
for use in 600 mm and 800 mm (23.6 or 31.5 in) deep Rittal TS8 style enclosures.
See Section 2: Specification.
The mounting frames position the DELTA power modules close to the rear of the enclosure. This maximises the
space at the front of the DELTA power modules for interconnections and for mounting SMPS modules and CDM
shrouding.
3.6.2.2
Height
It is usual for DELTA drives to be installed into 1600 mm to 2400 mm tall enclosures. The enclosure height is
application specific and depends on the other equipment fitted around the DELTA modules and the final
installation space requirement. The DELTA module mounting frame may be fitted at any height within the
enclosure, but the height is determined by the following constraints:
•
Position of cooling system;
•
Location and type of reactors;
•
Cable entry;
•
Position of auxiliary equipment.
3.6.2.3
Width
The width of the enclosure is predominantly determined by the number of DELTA power modules used in each
bridge (up to a maximum of three per bridge).
DELTA power modules are mounted side by side, on a pitch of 250 mm. If the control components are
mounted into the same enclosure, ensure there is sufficient width for these, to the side of the power modules.
The horizontal position of the DELTA power modules is determined by the mounting frame.
3.6.3
CDM Installation In Multiple Enclosures
If a CDM is to be installed into multiple enclosures, these must be electrical bonded as detailed in Section
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