Avid Technology MV3000 DELTA, Техническое руководство

Страница: 59 / 188

T1689 Technical Manual Rev 07 Specification
MV3000 Air Cooled DELTA MV DELTA Cooling System: High Performance Version (MVC3014-4001)
Page 59
2.11 MV DELTA COOLING SYSTEM: HIGH PERFORMANCE VERSION (MVC3014-4001)
Figure 2–21. – MVC3014-4001 DELTA High Performance Cooling System
2.11.1.1 Introduction
Each DELTA rectifier and transistor module is principally cooled by a fan located above the module itself.
The fan force cools the DELTA modules by drawing air in through the bottom mounting plate from the DELTA
module heat sink, which is then expelled through a chosen aperture (front, rear or top) to allow a dirty air
configuration.
2.11.1.2 Features
•
Common design for use in transistor, rectifier, and reactor modules.
•
Single-phase a.c. supply
•
Air outlet may be in any of three directions, top front, or back. Two blanking plates are supplied
to blank off the unused apertures.
•
The fan assembly may be sealed directly to a suitable opening in the cubicle roof plate meaning
no additional ducting is required.
•
Attaches directly to the DELTA upper cross rails, additional fixings only being required to attach
air outlet ducting (application dependant).
•
Fan assembly steelwork contains upper guide rails for DELTA module installation.
•
Fan impeller may be removed from the front of the cubicle without removing the DELTA module.
•
Motor current & output limit protection.
•
Soft start.
•
Over temperature protection wired through internal monitoring relay with auto restart
(temperature dependant).
•
Line under voltage / phase failure detection.
NOTE: As the fan is an extractor, any leakage is into the ‘dirty air’ path. Care must be taken when ducting the
airflow out of the cubicle as this has a positive pressure differential to the remainder of the cubicle.