Manual Rev. 0.1 - February 2018
2-3
Section 2 - Minimum Installation Requirements
(E-Compact ATSC Transmitters)
Important to note that UPS does not necessarily need to have a battery bank, thus minimizing
the cost of the final product. This solution is much better than a conventional
stabilizer
due to
double conversion as explained earlier.
- The power factor correction (PFC) in the UPS is necessary to reduce the cost of electricity, it
reduces the reactive power (VAr), dimunindo the total power (VA).
Importantly, it is not efficient to have a transmitter with power factor correction (PFC) powered
by a UPS without PFC, because all the advantage achieved by the transmitter is lost on UPS,
not resulting in energy savings. When making this type of connection, you actually had a great
load (resistive behavior) to the UPS, but its electric power sees the input of the UPS (without
PFC, high consumption).
When we have a UPS with power factor correction (PFC), this will present a network for optimal
behavior (low reactive power, low consumption) even connected to a transmitter without PFC,
ie, it will correct the power factor of all the system.
Sizing of the UPS
Figure 2-2
- UPS on-line Double Conversion
RETIFIER
BATTERY
INVERTER
STATIC BYPASS KEY
CC
CA
CC
CA
PTX: Real Power (W)
Cosφ
: Power Factor Correction
%: Efficiency of the UPS
PW UPS = PTX
(COS
(real)
Φ * η
)
(UPS)
