Operation Manual

Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling - ATSC - High Power
Manual Rev. 0.0 - April 2016
1-19
1.4.5.10 Electrical Distribution Drawer (MCCB)
This drawer is responsible for the distribution and protection of AC power equipment, and has
the following characteristics:
- Inrush current limitation of equipment (inrush).
- Equipment protection in the event of over-voltage or phase failure in the AC network.
- Provides + 50V for the load bank drawer.
- Provides + 8V for the reflectometer.
- Provides + 15V for the relay.
Figure 1-12 - MCCB
NOTA:
The MOD GV MCCB drawer has different power capacities according to the respective transmitter
models, requiring the transmitter power specification.
Table 1-4 Models of electric distribution drawer (MCCB) as the transmitter model
TRANSMITTER MODEL
MCCB MODEL
EC701HP
NOT APPLICABLE
EC702HP
MOD GV 40031 MCCB
EC703HP
MOD GV 40030 MCCB
EC704HP
MOD GV 4993 MCCB
EC706HP
MOD GV 40061 MCCB
EC708HP
MOD GV 40062 MCCB
For more information on the electrical distribution drawer, see the Annex.
1.4.5.11 Cooling System
The transmitter’s cooling is obtained by forced air ventilation through of the ventilation of the
power drawers and excitation drawer. Within each power drawer there are fans modules that
promote circulation of air within them and especially the in the fins of the power modules’ heat
sinks.
The rear and top covers with vents also aid in cooling the transmitter, providing the drawers’
output with direct air power for the environment.